操作xml基本上就q么东西Q你仔细看看Q很单的
import java.io.File;
import java.io.FileOutputStream;
import java.util.Iterator;
import java.util.List;
import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.Node;
import org.dom4j.io.SAXReader;
import org.dom4j.io.XMLWriter;
public class HiberCFG {
/**
* @param args
*/
public void readXML(){
try{
String fname="hibernate.cfg.xml";
SAXReader reader=new SAXReader();
Document document=reader.read(new File(fname));
Element root=document.getRootElement();
List list=root.selectNodes("/hibernate-configuration/session-factory/property");
for(Iterator it=list.iterator();it.hasNext();){
Node node=(Node)it.next();
if(node.valueOf("@name").equals("hibernate.connection.url")){
//原url
String url=node.getText();
System.out.println(url);
//IP地址前的部分
String a1=url.substring(0,url.indexOf("http://")+2);
System.out.println(a1);
//IP地址后部?BR> String a2=url.substring(url.indexOf(":",(url.indexOf("http://")+2)),url.length());
System.out.println(a2);
String newIP="192.168.0.1";
//修改后的url
String newUrl=a1+newIP+a2;
System.out.println(newUrl);
//新url替换
node.setText(newUrl);
}
}
//文件保?BR> String indent=" ";//~进W号
boolean newLines=true;// 是否产生新行(即一个元素一?
XMLWriter writer=new XMLWriter(new FileOutputStream(fname),new org.dom4j.io.OutputFormat(indent,newLines,"utf-8"));
writer.write(document);
writer.flush();
writer.close();
System.out.println("成功");
}
catch(Exception ex){
System.out.println("p|");
ex.printStackTrace();
}
}
public static void main(String[] args) {
// TODO Auto-generated method stub
HiberCFG h=new HiberCFG();
h.readXML();
}
}
]]>
代码重复几乎是最常见的异味了(jin)。他也是Refactoring的主要目标之一。代码重复往往来自于copy-and-paste的编E风根{与他相对应OAOO是一个好pȝ的重要标志?/P>
2.Long method
它是传统l构化的“遗毒”。一个方法应当具有自我独立的意图Q不要把几个意图攑֜一赗?/P>
3.Large Class
大类是你把太多的责Ml了(jin)一个类。这里的规则是One Class One Responsibility.
4.Divergent Change
一个类里面的内容变化率不同。某些状态一个小时变?sh)ơ，某些则几个月一q才变(sh)ơ；某些状态因斚w的原因发生变化，而另一些则因ؓ(f)其他斚w的原因变?sh)ơ。面向对象的抽象是把相对不变的和相对变化相隔离。把问题变化的一斚w和另一斚w盔RR这使得q些相对不变的可以重用。问题变化的每个斚w都可以单独重用。这U相异变化的共存?sh)得重用非常困难?/P>
5.Shotgun Surgery
q正好和上面相反。对pȝ一个地方的改变涉及(qing)到其他许多地方的相关改变。这些变化率和变化内容相似的状态和行ؓ(f)通常应当攑֜同一个类中?/P>
6.Feature Envy
对象的目的就是封装状态以?qing)与q些状态紧密相关的行ؓ(f)。如果一个类的方法频J用get Ҏ(gu)存取其他cȝ状态进行计，那么你要考虑把行为移到涉?qing)状态数目最多的那个cR?/P>
7.Data Clumps
某些数据通常像孩子一h玩耍：(x)一起出现在很多cȝ成员变量中，一起出现在许多Ҏ(gu)的参CQ这些数据或许应该自q立Ş成对象?/P>
8.Primitive Obsession
面向对象的新手通常?fn)惯使用几个原始cd的数据来表示一个概c(din)譬如对于范_(d)他们?x)用两个数字。对于MoneyQ他们会(x)用一个QҎ(gu)来表C。因Z没有使用对象来表N题(sh)存在的概念，q得代码变的难以理解，解决问题的难度大大增加。好的习(fn)惯是扩充语言所能提供原始类型，用小对象来表C围、金额、{化率、邮政编码等{?/P>
9.Switch Statement
Z帔R的开兌句是OO 的大敌，你应当把他变?sh)子cRstate或strategy.
10. Parallel Inheritance Hierarchies
q行的承层ơ是shotgun surgery的特D情c(din)因为当你改变(sh)个层ơ中的某一个类Ӟ你必d时改变另外一个层ơ的q行子类?/P>
11. Lazy Class
一个干zM多的cR类的维护需要额外的开销Q如果一个类承担?jin)太的责QQ应当消除它?/P>
12. Speculative Generality
一个类实现?jin)从未用到的功能和通用性。通常q样的类或方法唯一的用htestcase.不要犹UQ删除它?/P>
13. Temporary Field
一个对象的属性可能只在某些情况下才有意义。这L(fng)代码难以理解。专门徏立一个对象来持有q样的孤儿属性，把只和他相关的行为移到该cR最常见的是一个特定的法需要某些只有该法才有用的变量?/P>
14. Message Chain
消息铑֏生于当一个客户向一个对象要求另一个对象，然后客户又向q另一对象要求另一个对象，再向q另一个对象要求另一个对象，如此如此。这Ӟ你需要隐藏分z?/P>
15. Middle Man
对象的基本特性之一是装Q而你l常?x)通过分派d现封装。但是这一步不能走得太q，如果你发C个类接口的一大半Ҏ(gu)都在做分z，你可能需要移去这个中间h?/P>
16. Inappropriate Intimacy
某些cȝ互之间太亲密Q它们花费了(jin)太多的时间去砖研别h的私有部分。对人类而言Q我们也怸应该太假正经Q但我们应当让自qcM格遵守禁Ʋ主义?/P>
17. Alternative Classes with Different Interfaces
做相同事情的Ҏ(gu)有不同的函数signatureQ一致把它们往cdơ上U，直至协议一致?/P>
18. Incomplete Library Class
要徏立一个好的类库非常困难。我们大量的E序工作都基于类库实现。然而，如此q泛而又相异的目标对库构提Z(jin)苛刻的要求。库构徏者也不是万能的。有时候我们会(x)发现库类无法实现我们需要的功能。而直接对库类的修Ҏ(gu)非常困难。这时候就需要用各种手段q行Refactoring.
19. Data Class
对象包括状态和行ؓ(f)。如果一个类只有状态没有行为，那么肯定有什么地方出问题?sh)(jin)?/P>
20. Refused Bequest
类传下来很多行为和状态，而子cd是用?jin)其中的很小一部分。这通常意味着你的cdơ有问题?/P>
21. Comments
l常觉得要写很多注释表示你的代码难以理解。如果这U感觉太多，表示你需要Refactoring?/P>
胜于博而止于精
法乎天地
以归q大?BR>用以八方
皆近乎至?
可言亦
]]>
下蝲解压后，jar包复制到 \WEB-INF\lib 目录后重启服务器Qjspsmart卛_正常使用?/P>
1、uploadimage.jsp
<%@ page contentType="text/html;charset=gb2312" language="java" import="java.io.*,java.awt.Image,java.awt.image.*,com.sun.image.codec.jpeg.*,
java.sql.*,com.jspsmart.upload.*,java.util.*,cn.oof.database.*,cn.oof.house.*"%>
<%
SmartUpload mySmartUpload =new SmartUpload();
long file_size_max=4000000;
String fileName2="",ext="",testvar="";
String url="uploadfile/images/"; //应保证在根目录中有此目录的存?BR>//初始?BR>mySmartUpload.initialize(pageContext);
//只允怸载此cL?BR>try {
mySmartUpload.setAllowedFilesList("jpg,gif");
//上蝲文g
mySmartUpload.upload();
} catch (Exception e){
%>
<SCRIPT language=javascript>
alert("只允怸?jpg?gifcd囄文g");
window.location='upfile.jsp';
</script>
<%
}
try{
com.jspsmart.upload.File myFile = mySmartUpload.getFiles().getFile(0);
if (myFile.isMissing()){%>
<SCRIPT language=javascript>
alert("请先选择要上传的文g");
window.location='upfile.jsp';
</script>
<%}
else{
//String myFileName=myFile.getFileName(); //取得上蝲的文件的文g?BR> ext= myFile.getFileExt(); //取得后缀?BR> int file_size=myFile.getSize(); //取得文g的大?nbsp;
String saveurl="";
if(file_size<file_size_max){
//更改文g名，取得当前上传旉的毫U数?BR> Calendar calendar = Calendar.getInstance();
String filename = String.valueOf(calendar.getTimeInMillis());
saveurl=request.getRealPath("/")+url;
saveurl+=filename+"."+ext; //保存路径
myFile.saveAs(saveurl,mySmartUpload.SAVE_PHYSICAL);
//out.print(filename);
//-----------------------上传完成Q开始生成羃略图-------------------------
java.io.File file = new java.io.File(saveurl); //d刚才上传的文?BR> String newurl=request.getRealPath("/")+url+filename+"_min."+ext; //新的~略图保存地址
Image src = javax.imageio.ImageIO.read(file); //构造I(yng)mage对象
float tagsize=200;
int old_w=src.getWidth(null); //得到源图?BR> int old_h=src.getHeight(null);
int new_w=0;
int new_h=0; //得到源图?BR> int tempsize;
float tempdouble;
if(old_w>old_h){
tempdouble=old_w/tagsize;
}else{
tempdouble=old_h/tagsize;
}
new_w=Math.round(old_w/tempdouble);
new_h=Math.round(old_h/tempdouble);//计算新图长宽
BufferedImage tag = new BufferedImage(new_w,new_h,BufferedImage.TYPE_INT_RGB);
tag.getGraphics().drawImage(src,0,0,new_w,new_h,null); //l制~小后的?BR> FileOutputStream newimage=new FileOutputStream(newurl); //输出到文件流
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(newimage);
encoder.encode(tag); //qJPEG~码
newimage.close();
}
else{
out.print("<SCRIPT language='javascript'>");
out.print("alert('上传文g大小不能过"+(file_size_max/1000)+"K');");
out.print("window.location='upfile.jsp;'");
out.print("</SCRIPT>");
}
}
}catch (Exception e){
e.toString();
}
%>
2 upload.htm
<html>
<head>
<title>请选择上传的图?lt;/title>
</head>
<body>
<table border="0" align="center" cellpadding="0" cellspacing="0">
<tr>
<td height="45" align="center" valign="middle"><form action="uploadimage.jsp" method="post" enctype="multipart/form-data" name="form1">
请选择上传的图?BR> <input type="file" name="file">
<input type="submit" name="Submit" value="上传">
</form></td>
</tr>
</table>
</body>
</html>
]]>
]]>
import java.util.*;
import java.io.*;
import java.net.*;
public class SinoDetect {
static final int GB2312 = 0;
static final int GBK = 1;
static final int HZ = 2;
static final int BIG5 = 3;
static final int EUC_TW = 4;
static final int ISO_2022_CN = 5;
static final int UTF8 = 6;
static final int UNICODE = 7;
static final int ASCII = 8;
static final int OTHER = 9;
static final int TOTAL_ENCODINGS = 10;
// Frequency tables to hold the GB, Big5, and EUC-TW character
// frequencies
int GBFreq[][];
int GBKFreq[][];
int Big5Freq[][];
int EUC_TWFreq[][];
//int UnicodeFreq[94][128];
public static String[] nicename;
public static String[] codings;
public SinoDetect() {
// Initialize the Frequency Table for GB, Big5, EUC-TW
GBFreq = new int[94][94];
GBKFreq = new int[126][191];
Big5Freq = new int[94][158];
EUC_TWFreq = new int[94][94];
codings = new String[TOTAL_ENCODINGS];
codings[GB2312] = "GB2312";
codings[GBK] = "GBK";
codings[HZ] = "HZ";
codings[BIG5] = "BIG5";
codings[EUC_TW] = "CNS11643";
codings[ISO_2022_CN] = "ISO2022CN";
codings[UTF8] = "UTF8";
codings[UNICODE] = "Unicode";
codings[ASCII] = "ASCII";
codings[OTHER] = "OTHER";
nicename = new String[TOTAL_ENCODINGS];
nicename[GB2312] = "GB2312";
nicename[GBK] = "GBK";
nicename[HZ] = "HZ";
nicename[BIG5] = "Big5";
nicename[EUC_TW] = "CNS 11643";
nicename[ISO_2022_CN] = "ISO 2022-CN";
nicename[UTF8] = "UTF-8";
nicename[UNICODE] = "Unicode";
nicename[ASCII] = "ASCII";
nicename[OTHER] = "OTHER";
initialize_frequencies();
}
public static void main(String argc[])
{
SinoDetect sinodetector;
int result = OTHER;
argc = new String[1];
//argc[0] = "c:\\chinesedata\\codeconvert\\voaunit.txt";
argc[0] = "中文";
sinodetector = new SinoDetect();
if (argc[0].startsWith("http://") == true)
{
try {
result = sinodetector.detectEncoding(new URL(argc[0]));
}
catch (Exception e) {
System.err.println("Bad URL " + e.toString());
}
} else {
//result = sinodetector.detectEncoding(new File(argc[0]));
result = sinodetector.detectEncoding(argc[0].getBytes());
}
System.out.println(nicename[result]);
}
/** Function : detectEncoding
Aruguments: URL
Returns : One of the encodings from the Encoding enumeration
(GB2312, HZ, BIG5, EUC_TW, ASCII, or OTHER)
Description: This function looks at the URL contents
and assigns it a probability score for each encoding type.
The encoding type with the highest probability is returned.
*/
public int detectEncoding(URL testurl) {
byte[] rawtext = new byte[10000];
int bytesread = 0, byteoffset = 0;
int guess = OTHER;
InputStream chinesestream;
try {
chinesestream = testurl.openStream();
while ((bytesread = chinesestream.read(rawtext, byteoffset, rawtext.length - byteoffset)) > 0) {
byteoffset += bytesread;
};
chinesestream.close();
guess = detectEncoding(rawtext);
}
catch (Exception e) {
System.err.println("Error loading or using URL " + e.toString());
guess = OTHER;
}
return guess;
}
/** Function : detectEncoding
Aruguments: File
Returns : One of the encodings from the Encoding enumeration
(GB2312, HZ, BIG5, EUC_TW, ASCII, or OTHER)
Description: This function looks at the file
and assigns it a probability score for each encoding type.
The encoding type with the highest probability is returned.
*/
public int detectEncoding(File testfile) {
FileInputStream chinesefile;
byte[] rawtext;
rawtext = new byte[(int)testfile.length()];
try {
chinesefile = new FileInputStream(testfile);
chinesefile.read(rawtext);
}
catch (Exception e) {
System.err.println("Error: " + e);
}
return detectEncoding(rawtext);
}
/** Function : detectEncoding
Aruguments: byte array
Returns : One of the encodings from the Encoding enumeration
(GB2312, HZ, BIG5, EUC_TW, ASCII, or OTHER)
Description: This function looks at the byte array
and assigns it a probability score for each encoding type.
The encoding type with the highest probability is returned.
*/
public int detectEncoding(byte[] rawtext) {
int[] scores;
int index, maxscore = 0;
int encoding_guess = OTHER;
scores = new int[TOTAL_ENCODINGS];
// Assign Scores
scores[GB2312] = gb2312_probability(rawtext);
scores[GBK] = gbk_probability(rawtext);
scores[HZ] = hz_probability(rawtext);
scores[BIG5] = big5_probability(rawtext);
scores[EUC_TW] = euc_tw_probability(rawtext);
scores[ISO_2022_CN] = iso_2022_cn_probability(rawtext);
scores[UTF8] = utf8_probability(rawtext);
scores[UNICODE] = utf16_probability(rawtext);
scores[ASCII] = ascii_probability(rawtext);
scores[OTHER] = 0;
// Tabulate Scores
for (index = 0; index < TOTAL_ENCODINGS; index++) {
if (scores[index] > maxscore) {
encoding_guess = index;
maxscore = scores[index];
}
}
// Return OTHER if nothing scored above 50
if (maxscore <= 50) {
encoding_guess = OTHER;
}
return encoding_guess;
}
/* Function: gb2312_probability
Argument: pointer to byte array
Returns : number from 0 to 100 representing probability
text in array uses GB-2312 encoding
*/
int gb2312_probability(byte[] rawtext) {
int i, rawtextlen = 0;
int dbchars = 1, gbchars = 1;
long gbfreq = 0, totalfreq = 1;
float rangeval = 0, freqval = 0;
int row, column;
// Stage 1: Check to see if characters fit into acceptable ranges
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen-1; i++) {
//System.err.println(rawtext[i]);
if (rawtext[i] >= 0) {
//asciichars++;
} else {
dbchars++;
if ((byte)0xA1 <= rawtext[i] && rawtext[i] <= (byte)0xF7 &&
(byte)0xA1 <= rawtext[i+1] && rawtext[i+1] <= (byte)0xFE)
{
gbchars++;
totalfreq += 500;
row = rawtext[i] + 256 - 0xA1;
column = rawtext[i+1] + 256 - 0xA1;
if (GBFreq[row][column] != 0) {
gbfreq += GBFreq[row][column];
} else if (15 <= row && row < 55) {
gbfreq += 200;
}
}
i++;
}
}
rangeval = 50 * ((float)gbchars/(float)dbchars);
freqval = 50 * ((float)gbfreq/(float)totalfreq);
return (int)(rangeval + freqval);
}
/* Function: gb2312_probability
Argument: pointer to byte array
Returns : number from 0 to 100 representing probability
text in array uses GB-2312 encoding
*/
int gbk_probability(byte[] rawtext) {
int i, rawtextlen = 0;
int dbchars = 1, gbchars = 1;
long gbfreq = 0, totalfreq = 1;
float rangeval = 0, freqval = 0;
int row, column;
// Stage 1: Check to see if characters fit into acceptable ranges
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen-1; i++) {
//System.err.println(rawtext[i]);
if (rawtext[i] >= 0) {
//asciichars++;
} else {
dbchars++;
if ((byte)0xA1 <= rawtext[i] && rawtext[i] <= (byte)0xF7 && // Original GB range
(byte)0xA1 <= rawtext[i+1] && rawtext[i+1] <= (byte)0xFE)
{
gbchars++;
totalfreq += 500;
row = rawtext[i] + 256 - 0xA1;
column = rawtext[i+1] + 256 - 0xA1;
//System.out.println("original row " + row + " column " + column);
if (GBFreq[row][column] != 0) {
gbfreq += GBFreq[row][column];
} else if (15 <= row && row < 55) {
gbfreq += 200;
}
}
else if ((byte)0x81 <= rawtext[i] && rawtext[i] <= (byte)0xFE && // Extended GB range
(((byte)0x80 <= rawtext[i+1] && rawtext[i+1] <= (byte)0xFE) ||
((byte)0x40 <= rawtext[i+1] && rawtext[i+1] <= (byte)0x7E)))
{
gbchars++;
totalfreq += 500;
row = rawtext[i] + 256 - 0x81;
if (0x40 <= rawtext[i+1] && rawtext[i+1] <= 0x7E) {
column = rawtext[i+1] - 0x40;
} else {
column = rawtext[i+1] + 256 - 0x80;
}
//System.out.println("extended row " + row + " column " + column + " rawtext[i] " + rawtext[i]);
if (GBKFreq[row][column] != 0) {
gbfreq += GBKFreq[row][column];
}
}
i++;
}
}
rangeval = 50 * ((float)gbchars/(float)dbchars);
freqval = 50 * ((float)gbfreq/(float)totalfreq);
// For regular GB files, this would give the same score, so I handicap it slightly
return (int)(rangeval + freqval) - 1;
}
/* Function: hz_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses HZ encoding
*/
int hz_probability(byte[] rawtext) {
int i, rawtextlen;
int hzchars = 0, dbchars = 1;
long hzfreq = 0, totalfreq = 1;
float rangeval = 0, freqval = 0;
int hzstart = 0, hzend = 0;
int row, column;
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen; i++) {
if (rawtext[i] == '~') {
if (rawtext[i+1] == '{') {
hzstart++;
i+=2;
while (i < rawtextlen - 1) {
if (rawtext[i] == 0x0A || rawtext[i] == 0x0D) {
break;
} else if (rawtext[i] == '~' && rawtext[i+1] == '}') {
hzend++;
i++;
break;
} else if ((0x21 <= rawtext[i] && rawtext[i] <= 0x77) &&
(0x21 <= rawtext[i+1] && rawtext[i+1] <= 0x77)) {
hzchars+=2;
row = rawtext[i] - 0x21;
column = rawtext[i+1] - 0x21;
totalfreq += 500;
if (GBFreq[row][column] != 0) {
hzfreq += GBFreq[row][column];
} else if (15 <= row && row < 55) {
hzfreq += 200;
}
} else if ((0xA1 <= rawtext[i] && rawtext[i] <= 0xF7) &&
(0xA1 <= rawtext[i+1] && rawtext[i+1] <= 0xF7)) {
hzchars+=2;
row = rawtext[i] + 256 - 0xA1;
column = rawtext[i+1] + 256 - 0xA1;
totalfreq += 500;
if (GBFreq[row][column] != 0) {
hzfreq += GBFreq[row][column];
} else if (15 <= row && row < 55) {
hzfreq += 200;
}
}
dbchars+=2;
i+=2;
}
} else if (rawtext[i+1] == '}') {
hzend++;
i++;
} else if (rawtext[i+1] == '~') {
i++;
}
}
}
if (hzstart > 4) {
rangeval = 50;
} else if (hzstart > 1) {
rangeval = 41;
} else if (hzstart > 0) { // Only 39 in case the sequence happened to occur
rangeval = 39; // in otherwise non-Hz text
} else {
rangeval = 0;
}
freqval = 50 * ((float)hzfreq/(float)totalfreq);
return (int)(rangeval + freqval);
}
/** Function: big5_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses Big5 encoding
*/
int big5_probability(byte[] rawtext) {
int score = 0;
int i, rawtextlen = 0;
int dbchars = 1, bfchars = 1;
float rangeval = 0, freqval = 0;
long bffreq = 0, totalfreq = 1;
int row, column;
// Check to see if characters fit into acceptable ranges
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen-1; i++) {
if (rawtext[i] >= 0) {
//asciichars++;
} else {
dbchars++;
if ((byte)0xA1 <= rawtext[i] && rawtext[i] <= (byte)0xF9 &&
(((byte)0x40 <= rawtext[i+1] && rawtext[i+1] <= (byte)0x7E) ||
((byte)0xA1 <= rawtext[i+1] && rawtext[i+1] <= (byte)0xFE)))
{
bfchars++;
totalfreq += 500;
row = rawtext[i] + 256 - 0xA1;
if (0x40 <= rawtext[i+1] && rawtext[i+1] <= 0x7E) {
column = rawtext[i+1] - 0x40;
} else {
column = rawtext[i+1] + 256 - 0x61;
}
if (Big5Freq[row][column] != 0) {
bffreq += Big5Freq[row][column];
} else if (3 <= row && row <= 37) {
bffreq += 200;
}
}
i++;
}
}
rangeval = 50 * ((float)bfchars/(float)dbchars);
freqval = 50 * ((float)bffreq/(float)totalfreq);
return (int)(rangeval + freqval);
}
/* Function: euc_tw_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses EUC-TW (CNS 11643) encoding
*/
int euc_tw_probability(byte[] rawtext) {
int i, rawtextlen = 0;
int dbchars = 1, cnschars = 1;
long cnsfreq = 0, totalfreq = 1;
float rangeval = 0, freqval = 0;
int row, column;
// Check to see if characters fit into acceptable ranges
// and have expected frequency of use
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen-1; i++) {
if (rawtext[i] >= 0) { // in ASCII range
//asciichars++;
} else { // high bit set
dbchars++;
if (i + 3 < rawtextlen && (byte)0x8E == rawtext[i] &&
(byte)0xA1 <= rawtext[i+1] && rawtext[i+1] <= (byte)0xB0 &&
(byte)0xA1 <= rawtext[i+2] && rawtext[i+2] <= (byte)0xFE &&
(byte)0xA1 <= rawtext[i+3] && rawtext[i+3] <= (byte)0xFE) { // Planes 1 - 16
cnschars++;
//System.out.println("plane 2 or above CNS char");
// These are all less frequent chars so just ignore freq
i+=3;
} else if ((byte)0xA1 <= rawtext[i] && rawtext[i] <= (byte)0xFE && // Plane 1
(byte)0xA1 <= rawtext[i+1] && rawtext[i+1] <= (byte)0xFE)
{
cnschars++;
totalfreq += 500;
row = rawtext[i] + 256 - 0xA1;
column = rawtext[i+1] + 256 - 0xA1;
if (EUC_TWFreq[row][column] != 0) {
cnsfreq += EUC_TWFreq[row][column];
} else if (35 <= row && row <= 92) {
cnsfreq += 150;
}
i++;
}
}
}
rangeval = 50 * ((float)cnschars/(float)dbchars);
freqval = 50 * ((float)cnsfreq/(float)totalfreq);
return (int)(rangeval + freqval);
}
/* Function: iso_2022_cn_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses ISO 2022-CN encoding
WORKS FOR BASIC CASES, BUT STILL NEEDS MORE WORK
*/
int iso_2022_cn_probability(byte[] rawtext) {
int i, rawtextlen = 0;
int dbchars = 1, isochars = 1;
long isofreq = 0, totalfreq = 1;
float rangeval = 0, freqval = 0;
int row, column;
// Check to see if characters fit into acceptable ranges
// and have expected frequency of use
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen-1; i++) {
if (rawtext[i] == (byte)0x1B && i+3 < rawtextlen) { // Escape char ESC
if (rawtext[i+1] == (byte)0x24 && rawtext[i+2] == 0x29 &&
rawtext[i+3] == (byte)0x41) { // GB Escape $ ) A
i += 4;
while (rawtext[i] != (byte)0x1B) {
dbchars++;
if ((0x21 <= rawtext[i] && rawtext[i] <= 0x77) &&
(0x21 <= rawtext[i+1] && rawtext[i+1] <= 0x77)) {
isochars++;
row = rawtext[i] - 0x21;
column = rawtext[i+1] - 0x21;
totalfreq += 500;
if (GBFreq[row][column] != 0) {
isofreq += GBFreq[row][column];
} else if (15 <= row && row < 55) {
isofreq += 200;
}
i++;
}
i++;
}
} else if (i+3 < rawtextlen &&
rawtext[i+1] == (byte)0x24 && rawtext[i+2] == (byte)0x29 &&
rawtext[i+3] == (byte)0x47) {
// CNS Escape $ ) G
i+=4;
while (rawtext[i] != (byte)0x1B) {
dbchars++;
if ((byte)0x21 <= rawtext[i] && rawtext[i] <= (byte)0x7E &&
(byte)0x21 <= rawtext[i+1] && rawtext[i+1] <= (byte)0x7E)
{
isochars++;
totalfreq += 500;
row = rawtext[i] - 0x21;
column = rawtext[i+1] - 0x21;
if (EUC_TWFreq[row][column] != 0) {
isofreq += EUC_TWFreq[row][column];
} else if (35 <= row && row <= 92) {
isofreq += 150;
}
i++;
}
i++;
}
}
if (rawtext[i] == (byte)0x1B && i+2 < rawtextlen &&
rawtext[i+1] == (byte)0x28 && rawtext[i+2] == (byte)0x42) { // ASCII: ESC ( B
i+=2;
}
}
}
rangeval = 50 * ((float)isochars/(float)dbchars);
freqval = 50 * ((float)isofreq/(float)totalfreq);
//System.out.println("isochars dbchars isofreq totalfreq " + isochars + " " + dbchars + " " + isofreq + " " + totalfreq + " " + rangeval + " " + freqval);
return (int)(rangeval + freqval);
//return 0;
}
/* Function: utf8_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses UTF-8 encoding of Unicode
*/
int utf8_probability(byte[] rawtext) {
int score = 0;
int i, rawtextlen = 0;
int goodbytes = 0, asciibytes = 0;
// Maybe also use UTF8 Byte Order Mark: EF BB BF
// Check to see if characters fit into acceptable ranges
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen; i++) {
if ((rawtext[i] & (byte)0x7F) == rawtext[i]) { // One byte
asciibytes++;
// Ignore ASCII, can throw off count
} else if (-64 <= rawtext[i] && rawtext[i] <= -33 && // Two bytes
i+1 < rawtextlen &&
-128 <= rawtext[i+1] && rawtext[i+1] <= -65) {
goodbytes += 2;
i++;
} else if (-32 <= rawtext[i] && rawtext[i] <= -17 && // Three bytes
i+2 < rawtextlen &&
-128 <= rawtext[i+1] && rawtext[i+1] <= -65 &&
-128 <= rawtext[i+2] && rawtext[i+2] <= -65) {
goodbytes += 3;
i+=2;
}
}
if (asciibytes == rawtextlen) { return 0; }
score = (int)(100 * ((float)goodbytes/(float)(rawtextlen-asciibytes)));
// If not above 98, reduce to zero to prevent coincidental matches
// Allows for some (few) bad formed sequences
if (score > 98) {
return score;
} else if (score > 95 && goodbytes > 30) {
return score;
} else {
return 0;
}
}
/* Function: utf16_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses UTF-16 encoding of Unicode, guess based on BOM
// NOT VERY GENERAL, NEEDS MUCH MORE WORK
*/
int utf16_probability(byte[] rawtext) {
//int score = 0;
//int i, rawtextlen = 0;
//int goodbytes = 0, asciibytes = 0;
if (((byte)0xFE == rawtext[0] && (byte)0xFF == rawtext[1]) || // Big-endian
((byte)0xFF == rawtext[0] && (byte)0xFE == rawtext[1])) { // Little-endian
return 100;
}
return 0;
/* // Check to see if characters fit into acceptable ranges
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen; i++) {
if ((rawtext[i] & (byte)0x7F) == rawtext[i]) { // One byte
goodbytes += 1;
asciibytes++;
} else if ((rawtext[i] & (byte)0xDF) == rawtext[i]) { // Two bytes
if (i+1 < rawtextlen &&
(rawtext[i+1] & (byte)0xBF) == rawtext[i+1]) {
goodbytes += 2;
i++;
}
} else if ((rawtext[i] & (byte)0xEF) == rawtext[i]) { // Three bytes
if (i+2 < rawtextlen &&
(rawtext[i+1] & (byte)0xBF) == rawtext[i+1] &&
(rawtext[i+2] & (byte)0xBF) == rawtext[i+2]) {
goodbytes += 3;
i+=2;
}
}
}
score = (int)(100 * ((float)goodbytes/(float)rawtext.length));
// An all ASCII file is also a good UTF8 file, but I'd rather it
// get identified as ASCII. Can delete following 3 lines otherwise
if (goodbytes == asciibytes) {
score = 0;
}
// If not above 90, reduce to zero to prevent coincidental matches
if (score > 90) {
return score;
} else {
return 0;
} */
}
/* Function: ascii_probability
Argument: byte array
Returns : number from 0 to 100 representing probability
text in array uses all ASCII
Description: Sees if array has any characters not in
ASCII range, if so, score is reduced
*/
int ascii_probability(byte[] rawtext) {
int score = 70;
int i, rawtextlen;
rawtextlen = rawtext.length;
for (i = 0; i < rawtextlen; i++) {
if (rawtext[i] < 0) {
score = score - 5;
} else if (rawtext[i] == (byte)0x1B) { // ESC (used by ISO 2022)
score = score - 5;
}
}
return score;
}
void initialize_frequencies() {
int i, j;
for (i = 0; i < 93; i++) {
for (j = 0; j < 93; j++) {
GBFreq[i][j] = 0;
}
}
for (i = 0; i < 126; i++) {
for (j = 0; j < 191; j++) {
GBKFreq[i][j] = 0;
}
}
for (i = 0; i < 93; i++) {
for (j = 0; j < 157; j++) {
Big5Freq[i][j] = 0;
}
}
for (i = 0; i < 93; i++) {
for (j = 0; j < 93; j++) {
EUC_TWFreq[i][j] = 0;
}
}
GBFreq[20][35] = 599; GBFreq[49][26] = 598;
GBFreq[41][38] = 597; GBFreq[17][26] = 596;
GBFreq[32][42] = 595; GBFreq[39][42] = 594;
GBFreq[45][49] = 593; GBFreq[51][57] = 592;
GBFreq[50][47] = 591; GBFreq[42][90] = 590;
GBFreq[52][65] = 589; GBFreq[53][47] = 588;
GBFreq[19][82] = 587; GBFreq[31][19] = 586;
GBFreq[40][46] = 585; GBFreq[24][89] = 584;
GBFreq[23][85] = 583; GBFreq[20][28] = 582;
GBFreq[42][20] = 581; GBFreq[34][38] = 580;
GBFreq[45][9] = 579; GBFreq[54][50] = 578;
GBFreq[25][44] = 577; GBFreq[35][66] = 576;
GBFreq[20][55] = 575; GBFreq[18][85] = 574;
GBFreq[20][31] = 573; GBFreq[49][17] = 572;
GBFreq[41][16] = 571; GBFreq[35][73] = 570;
GBFreq[20][34] = 569; GBFreq[29][44] = 568;
GBFreq[35][38] = 567; GBFreq[49][9] = 566;
GBFreq[46][33] = 565; GBFreq[49][51] = 564;
GBFreq[40][89] = 563; GBFreq[26][64] = 562;
GBFreq[54][51] = 561; GBFreq[54][36] = 560;
GBFreq[39][4] = 559; GBFreq[53][13] = 558;
GBFreq[24][92] = 557; GBFreq[27][49] = 556;
GBFreq[48][6] = 555; GBFreq[21][51] = 554;
GBFreq[30][40] = 553; GBFreq[42][92] = 552;
GBFreq[31][78] = 551; GBFreq[25][82] = 550;
GBFreq[47][0] = 549; GBFreq[34][19] = 548;
GBFreq[47][35] = 547; GBFreq[21][63] = 546;
GBFreq[43][75] = 545; GBFreq[21][87] = 544;
GBFreq[35][59] = 543; GBFreq[25][34] = 542;
GBFreq[21][27] = 541; GBFreq[39][26] = 540;
GBFreq[34][26] = 539; GBFreq[39][52] = 538;
GBFreq[50][57] = 537; GBFreq[37][79] = 536;
GBFreq[26][24] = 535; GBFreq[22][1] = 534;
GBFreq[18][40] = 533; GBFreq[41][33] = 532;
GBFreq[53][26] = 531; GBFreq[54][86] = 530;
GBFreq[20][16] = 529; GBFreq[46][74] = 528;
GBFreq[30][19] = 527; GBFreq[45][35] = 526;
GBFreq[45][61] = 525; GBFreq[30][9] = 524;
GBFreq[41][53] = 523; GBFreq[41][13] = 522;
GBFreq[50][34] = 521; GBFreq[53][86] = 520;
GBFreq[47][47] = 519; GBFreq[22][28] = 518;
GBFreq[50][53] = 517; GBFreq[39][70] = 516;
GBFreq[38][15] = 515; GBFreq[42][88] = 514;
GBFreq[16][29] = 513; GBFreq[27][90] = 512;
GBFreq[29][12] = 511; GBFreq[44][22] = 510;
GBFreq[34][69] = 509; GBFreq[24][10] = 508;
GBFreq[44][11] = 507; GBFreq[39][92] = 506;
GBFreq[49][48] = 505; GBFreq[31][46] = 504;
GBFreq[19][50] = 503; GBFreq[21][14] = 502;
GBFreq[32][28] = 501; GBFreq[18][3] = 500;
GBFreq[53][9] = 499; GBFreq[34][80] = 498;
GBFreq[48][88] = 497; GBFreq[46][53] = 496;
GBFreq[22][53] = 495; GBFreq[28][10] = 494;
GBFreq[44][65] = 493; GBFreq[20][10] = 492;
GBFreq[40][76] = 491; GBFreq[47][8] = 490;
GBFreq[50][74] = 489; GBFreq[23][62] = 488;
GBFreq[49][65] = 487; GBFreq[28][87] = 486;
GBFreq[15][48] = 485; GBFreq[22][7] = 484;
GBFreq[19][42] = 483; GBFreq[41][20] = 482;
GBFreq[26][55] = 481; GBFreq[21][93] = 480;
GBFreq[31][76] = 479; GBFreq[34][31] = 478;
GBFreq[20][66] = 477; GBFreq[51][33] = 476;
GBFreq[34][86] = 475; GBFreq[37][67] = 474;
GBFreq[53][53] = 473; GBFreq[40][88] = 472;
GBFreq[39][10] = 471; GBFreq[24][3] = 470;
GBFreq[27][25] = 469; GBFreq[26][15] = 468;
GBFreq[21][88] = 467; GBFreq[52][62] = 466;
GBFreq[46][81] = 465; GBFreq[38][72] = 464;
GBFreq[17][30] = 463; GBFreq[52][92] = 462;
GBFreq[34][90] = 461; GBFreq[21][7] = 460;
GBFreq[36][13] = 459; GBFreq[45][41] = 458;
GBFreq[32][5] = 457; GBFreq[26][89] = 456;
GBFreq[23][87] = 455; GBFreq[20][39] = 454;
GBFreq[27][23] = 453; GBFreq[25][59] = 452;
GBFreq[49][20] = 451; GBFreq[54][77] = 450;
GBFreq[27][67] = 449; GBFreq[47][33] = 448;
GBFreq[41][17] = 447; GBFreq[19][81] = 446;
GBFreq[16][66] = 445; GBFreq[45][26] = 444;
GBFreq[49][81] = 443; GBFreq[53][55] = 442;
GBFreq[16][26] = 441; GBFreq[54][62] = 440;
GBFreq[20][70] = 439; GBFreq[42][35] = 438;
GBFreq[20][57] = 437; GBFreq[34][36] = 436;
GBFreq[46][63] = 435; GBFreq[19][45] = 434;
GBFreq[21][10] = 433; GBFreq[52][93] = 432;
GBFreq[25][2] = 431; GBFreq[30][57] = 430;
GBFreq[41][24] = 429; GBFreq[28][43] = 428;
GBFreq[45][86] = 427; GBFreq[51][56] = 426;
GBFreq[37][28] = 425; GBFreq[52][69] = 424;
GBFreq[43][92] = 423; GBFreq[41][31] = 422;
GBFreq[37][87] = 421; GBFreq[47][36] = 420;
GBFreq[16][16] = 419; GBFreq[40][56] = 418;
GBFreq[24][55] = 417; GBFreq[17][1] = 416;
GBFreq[35][57] = 415; GBFreq[27][50] = 414;
GBFreq[26][14] = 413; GBFreq[50][40] = 412;
GBFreq[39][19] = 411; GBFreq[19][89] = 410;
GBFreq[29][91] = 409; GBFreq[17][89] = 408;
GBFreq[39][74] = 407; GBFreq[46][39] = 406;
GBFreq[40][28] = 405; GBFreq[45][68] = 404;
GBFreq[43][10] = 403; GBFreq[42][13] = 402;
GBFreq[44][81] = 401; GBFreq[41][47] = 400;
GBFreq[48][58] = 399; GBFreq[43][68] = 398;
GBFreq[16][79] = 397; GBFreq[19][5] = 396;
GBFreq[54][59] = 395; GBFreq[17][36] = 394;
GBFreq[18][0] = 393; GBFreq[41][5] = 392;
GBFreq[41][72] = 391; GBFreq[16][39] = 390;
GBFreq[54][0] = 389; GBFreq[51][16] = 388;
GBFreq[29][36] = 387; GBFreq[47][5] = 386;
GBFreq[47][51] = 385; GBFreq[44][7] = 384;
GBFreq[35][30] = 383; GBFreq[26][9] = 382;
GBFreq[16][7] = 381; GBFreq[32][1] = 380;
GBFreq[33][76] = 379; GBFreq[34][91] = 378;
GBFreq[52][36] = 377; GBFreq[26][77] = 376;
GBFreq[35][48] = 375; GBFreq[40][80] = 374;
GBFreq[41][92] = 373; GBFreq[27][93] = 372;
GBFreq[15][17] = 371; GBFreq[16][76] = 370;
GBFreq[51][12] = 369; GBFreq[18][20] = 368;
GBFreq[15][54] = 367; GBFreq[50][5] = 366;
GBFreq[33][22] = 365; GBFreq[37][57] = 364;
GBFreq[28][47] = 363; GBFreq[42][31] = 362;
GBFreq[18][2] = 361; GBFreq[43][64] = 360;
GBFreq[23][47] = 359; GBFreq[28][79] = 358;
GBFreq[25][45] = 357; GBFreq[23][91] = 356;
GBFreq[22][19] = 355; GBFreq[25][46] = 354;
GBFreq[22][36] = 353; GBFreq[54][85] = 352;
GBFreq[46][20] = 351; GBFreq[27][37] = 350;
GBFreq[26][81] = 349; GBFreq[42][29] = 348;
GBFreq[31][90] = 347; GBFreq[41][59] = 346;
GBFreq[24][65] = 345; GBFreq[44][84] = 344;
GBFreq[24][90] = 343; GBFreq[38][54] = 342;
GBFreq[28][70] = 341; GBFreq[27][15] = 340;
GBFreq[28][80] = 339; GBFreq[29][8] = 338;
GBFreq[45][80] = 337; GBFreq[53][37] = 336;
GBFreq[28][65] = 335; GBFreq[23][86] = 334;
GBFreq[39][45] = 333; GBFreq[53][32] = 332;
GBFreq[38][68] = 331; GBFreq[45][78] = 330;
GBFreq[43][7] = 329; GBFreq[46][82] = 328;
GBFreq[27][38] = 327; GBFreq[16][62] = 326;
GBFreq[24][17] = 325; GBFreq[22][70] = 324;
GBFreq[52][28] = 323; GBFreq[23][40] = 322;
GBFreq[28][50] = 321; GBFreq[42][91] = 320;
GBFreq[47][76] = 319; GBFreq[15][42] = 318;
GBFreq[43][55] = 317; GBFreq[29][84] = 316;
GBFreq[44][90] = 315; GBFreq[53][16] = 314;
GBFreq[22][93] = 313; GBFreq[34][10] = 312;
GBFreq[32][53] = 311; GBFreq[43][65] = 310;
GBFreq[28][7] = 309; GBFreq[35][46] = 308;
GBFreq[21][39] = 307; GBFreq[44][18] = 306;
GBFreq[40][10] = 305; GBFreq[54][53] = 304;
GBFreq[38][74] = 303; GBFreq[28][26] = 302;
GBFreq[15][13] = 301; GBFreq[39][34] = 300;
GBFreq[39][46] = 299; GBFreq[42][66] = 298;
GBFreq[33][58] = 297; GBFreq[15][56] = 296;
GBFreq[18][51] = 295; GBFreq[49][68] = 294;
GBFreq[30][37] = 293; GBFreq[51][84] = 292;
GBFreq[51][9] = 291; GBFreq[40][70] = 290;
GBFreq[41][84] = 289; GBFreq[28][64] = 288;
GBFreq[32][88] = 287; GBFreq[24][5] = 286;
GBFreq[53][23] = 285; GBFreq[42][27] = 284;
GBFreq[22][38] = 283; GBFreq[32][86] = 282;
GBFreq[34][30] = 281; GBFreq[38][63] = 280;
GBFreq[24][59] = 279; GBFreq[22][81] = 278;
GBFreq[32][11] = 277; GBFreq[51][21] = 276;
GBFreq[54][41] = 275; GBFreq[21][50] = 274;
GBFreq[23][89] = 273; GBFreq[19][87] = 272;
GBFreq[26][7] = 271; GBFreq[30][75] = 270;
GBFreq[43][84] = 269; GBFreq[51][25] = 268;
GBFreq[16][67] = 267; GBFreq[32][9] = 266;
GBFreq[48][51] = 265; GBFreq[39][7] = 264;
GBFreq[44][88] = 263; GBFreq[52][24] = 262;
GBFreq[23][34] = 261; GBFreq[32][75] = 260;
GBFreq[19][10] = 259; GBFreq[28][91] = 258;
GBFreq[32][83] = 257; GBFreq[25][75] = 256;
GBFreq[53][45] = 255; GBFreq[29][85] = 254;
GBFreq[53][59] = 253; GBFreq[16][2] = 252;
GBFreq[19][78] = 251; GBFreq[15][75] = 250;
GBFreq[51][42] = 249; GBFreq[45][67] = 248;
GBFreq[15][74] = 247; GBFreq[25][81] = 246;
GBFreq[37][62] = 245; GBFreq[16][55] = 244;
GBFreq[18][38] = 243; GBFreq[23][23] = 242;
]]>
一、安装篇
jspSmartUpload是由www.jspsmart.com|站开发的一个可免费使用的全功能的文件上传下载组Ӟ适于嵌入执行上传下蝲操作的JSP文g中。该lg有以下几个特点：(x)
1、用简单。在JSP文g中仅仅书写三五行JAVA代码可以搞定文件的上传或下载，方便?nbsp;
2、能全程控制上传。利用jspSmartUploadlg提供的对象及(qing)其操作方法，可以获得全部上传文g的信息（包括文g名，大小Q类型，扩展名，文g数据{）(j)Q方便存取?nbsp;
3、能对上传的文g在大、类型等斚w做出限制。如此可以o(h)掉不W合要求的文件?nbsp;
4、下载灵zR仅写两行代码，p把Web服务器变成文件服务器。不文件在Web服务器的目录下或在其它Q何目录下Q都可以利用jspSmartUploadq行下蝲?nbsp;
5、能文件上传到数据库中Q也能将数据库中的数据下载下来。这U功能针对的是MYSQL数据库，因ؓ(f)不具有通用性，所以本文不准备举例介绍q种用法?nbsp;
jspSmartUploadlg可以从www.jspsmart.com|站上自׃载，压羃包的名字是jspSmartUpload.zip。下载后Q用WinZip或WinRAR其解压到Tomcat的webapps目录下（本文以Tomcat服务器ؓ(f)例进行介l）(j)。解压后Q将webapps/jspsmartupload目录下的子目录Web-inf名字改ؓ(f)全大写的WEB-INFQ这样一改jspSmartUploadcL能用。因为TomcatҎ(gu)件名大小写敏感，它要求Web应用E序相关的类所在目录ؓ(f)WEB-INFQ且必须是大写。接着重新启动TomcatQ这样就可以在JSP文g中用jspSmartUploadlg?jin)?nbsp;
注意Q按上述Ҏ(gu)安装后，只有webapps/jspsmartupload目录下的E序可以使用jspSmartUploadlgQ如果想让Tomcat服务器的所有Web应用E序都能用它Q必d如下工作Q?nbsp;
1Q进入命令行状态，目录切换到Tomcat的webapps/jspsmartupload/WEB-INF目录下?nbsp;
2Q运行JAR打包命o(h)Qjar cvf jspSmartUpload.jar com
Q也可以打开资源理器，切换到当前目录，用WinZipcom目录下的所有文件压~成jspSmartUpload.zipQ然后将jspSmartUpload.zip换名为jspSmartUpload.jar文g卛_。）(j)
3Q将jspSmartUpload.jar拯到Tomcat的shared/lib目录下?nbsp;
二、相关类说明?nbsp;
?nbsp;Filec?nbsp;
q个cd装了(jin)一个上传文件的所有信息。通过它，可以得到上传文g的文件名、文件大、扩展名、文件数据等信息?nbsp;
FilecM要提供以下方法：(x)
1、saveAs作用Q将文g换名另存?nbsp;
原型Q?nbsp;
public void saveAs(java.lang.String destFilePathName)
?nbsp;
public void saveAs(java.lang.String destFilePathName, int optionSaveAs)
其中QdestFilePathName是另存的文g名，optionSaveAs是另存的选项Q该选项有三个|分别是SAVEAS_PHYSICAL,SAVEAS_VIRTUALQSAVEAS_AUTO。SAVEAS_PHYSICAL表明以操作系l的根目录ؓ(f)文g根目录另存文ӞSAVEAS_VIRTUAL表明以Web应用E序的根目录为文件根目录另存文gQSAVEAS_AUTO则表Clg军_Q当Web应用E序的根目录存在另存文g的目录时Q它?x)选择SAVEAS_VIRTUALQ否则会(x)选择SAVEAS_PHYSICAL?nbsp;
例如QsaveAs("/upload/sample.zip",SAVEAS_PHYSICAL)执行后若Web服务器安装在C盘，则另存的文g名实际是c:\upload\sample.zip。而saveAs("/upload/sample.zip",SAVEAS_VIRTUAL)执行后若Web应用E序的根目录是webapps/jspsmartuploadQ则另存的文件名实际是webapps/jspsmartupload/upload/sample.zip。saveAs("/upload/sample.zip",SAVEAS_AUTO)执行时若Web应用E序根目录下存在upload目录Q则其效果同saveAs("/upload/sample.zip",SAVEAS_VIRTUAL)Q否则同saveAs("/upload/sample.zip",SAVEAS_PHYSICAL)?nbsp;
Q对于WebE序的开发来_(d)最好用SAVEAS_VIRTUALQ以便移植?nbsp;
2、isMissing
作用Q这个方法用于判断用h否选择?jin)文Ӟ也即对应的表单项是否有倹{选择?jin)文件时Q它q回false。未选文件时Q它q回true?nbsp;
原型Qpublic boolean isMissing()
3、getFieldName
作用Q取HTML表单中对应于此上传文件的表单的名字?nbsp;
原型Qpublic String getFieldName()
4、getFileName
作用Q取文g名（不含目录信息Q?nbsp;
原型Qpublic String getFileName()
5、getFilePathName
作用Q取文g全名Q带目录Q?nbsp;
原型Qpublic String getFilePathName
6、getFileExt
作用Q取文g扩展名（后缀Q?nbsp;
原型Qpublic String getFileExt()
7、getSize
作用Q取文g长度Q以字节计）(j)
原型Qpublic int getSize()
8、getBinaryData
作用Q取文g数据中指定位Ud的一个字节，用于(g)文件等处理?nbsp;
原型Qpublic byte getBinaryData(int index)。其中，index表示位移Q其值在0到getSize()-1之间?nbsp;
?nbsp;Filesc?nbsp;
q个c表C所有上传文件的集合Q通过它可以得C传文件的数目、大等信息。有以下Ҏ(gu)Q?nbsp;
1、getCount
作用Q取得上传文件的数目?nbsp;
原型Qpublic int getCount()
2、getFile
作用Q取得指定位Ud的文件对象FileQ这是com.jspsmart.upload.FileQ不是java.io.FileQ注意区分）(j)?nbsp;
原型Qpublic File getFile(int index)。其中，index为指定位U，其值在0到getCount()-1之间?nbsp;
3、getSize
作用Q取得上传文件的总长度，可用于限制一ơ性上传的数据量大?nbsp;
原型Qpublic long getSize()
4、getCollection
作用Q将所有上传文件对象以Collection的Ş式返回，以便其它应用E序引用Q浏览上传文件信息?nbsp;
原型Qpublic Collection getCollection()
5、getEnumeration
作用Q将所有上传文件对象以EnumerationQ枚举）(j)的Ş式返回，以便其它应用E序览上传文g信息?nbsp;
原型Qpublic Enumeration getEnumeration()
?nbsp;Requestc?nbsp;
q个cȝ功能{同于JSP内置的对象request。只所以提供这个类Q是因ؓ(f)对于文g上传表单Q通过request对象无法获得表单的|必须通过jspSmartUploadlg提供的Request对象来获取。该cL供如下方法：(x)
1、getParameter
作用Q获取指定参C倹{当参数不存在时Q返回gؓ(f)null?nbsp;
原型Qpublic String getParameter(String name)。其中，name为参数的名字?nbsp;
2、getParameterValues
作用Q当一个参数可以有多个值时Q用此方法来取其倹{它q回的是一个字W串数组。当参数不存在时Q返回gؓ(f)null?nbsp;
原型Qpublic String[] getParameterValues(String name)。其中，name为参数的名字?nbsp;
3、getParameterNames
作用Q取得Request对象中所有参数的名字Q用于遍历所有参数。它q回的是一个枚丑֞的对象?nbsp;
原型Qpublic Enumeration getParameterNames()
?nbsp;SmartUploadc这个类完成上传下蝲工作?nbsp;
AQ上传与下蝲q的方法：(x)
只有一个：(x)initialize?nbsp;
作用Q执行上传下载的初始化工作，必须W一个执行?nbsp;
原型Q有多个Q主要用下面这个：(x)
public final void initialize(javax.servlet.jsp.PageContext pageContext)
其中QpageContext为JSP面内置对象Q页面上下文Q?nbsp;
BQ上传文件用的Ҏ(gu)Q?nbsp;
1、upload
作用Q上传文件数据。对于上传操作，W一步执行initializeҎ(gu)Q第二步p执行q个Ҏ(gu)?nbsp;
原型Qpublic void upload()
2、save
作用Q将全部上传文g保存到指定目录下Qƈq回保存的文件个数?nbsp;
原型Qpublic int save(String destPathName)
和public int save(String destPathName,int option)
其中QdestPathName为文件保存目录，optionZ存选项Q它有三个|分别是SAVE_PHYSICAL,SAVE_VIRTUAL和SAVE_AUTO。（同FilecȝsaveAsҎ(gu)的选项之值类|(j)SAVE_PHYSICAL指示lg文件保存到以操作系l根目录为文件根目录的目录下QSAVE_VIRTUAL指示lg文件保存到以Web应用E序根目录ؓ(f)文g根目录的目录下，而SAVE_AUTO则表C由lg自动选择?nbsp;
注：(x)save(destPathName)作用{同于save(destPathName,SAVE_AUTO)?nbsp;
3、getSize
作用Q取上传文g数据的总长?nbsp;
原型Qpublic int getSize()
4、getFiles
作用Q取全部上传文gQ以Files对象形式q回Q可以利用Filescȝ操作Ҏ(gu)来获得上传文件的数目{信息?nbsp;
原型Qpublic Files getFiles()
5、getRequest
作用Q取得Request对象Q以便由此对象获得上传表单参C倹{?nbsp;
原型Qpublic Request getRequest()
6、setAllowedFilesList
作用Q设定允怸传带有指定扩展名的文Ӟ当上传过E中有文件名不允许时Q组件将抛出异常?nbsp;
原型Qpublic void setAllowedFilesList(String allowedFilesList)
其中QallowedFilesList为允怸传的文g扩展名列表，各个扩展名之间以逗号分隔。如果想允许上传那些没有扩展名的文gQ可以用两个逗号表示。例如：(x)setAllowedFilesList("doc,txt,,")允怸传带doc和txt扩展名的文g以及(qing)没有扩展名的文g?nbsp;
7、setDeniedFilesList
作用Q用于限制上传那些带有指定扩展名的文件。若有文件扩展名被限Ӟ则上传时lg抛出异常?nbsp;
原型Qpublic void setDeniedFilesList(String deniedFilesList)
其中QdeniedFilesList为禁止上传的文g扩展名列表，各个扩展名之间以逗号分隔。如果想止上传那些没有扩展名的文gQ可以用两个逗号来表C。例如：(x)setDeniedFilesList("exe,bat,,")禁止上传带exe和bat扩展名的文g以及(qing)没有扩展名的文g?nbsp;
8、setMaxFileSize
作用Q设定每个文件允怸传的最大长度?nbsp;
原型Qpublic void setMaxFileSize(long maxFileSize)
其中QmaxFileSizeZؓ(f)每个文g允许上传的最大长度，当文件超出此长度Ӟ不被上传?nbsp;
9、setTotalMaxFileSize
作用Q设定允怸传的文g的总长度，用于限制一ơ性上传的数据量大?nbsp;
原型Qpublic void setTotalMaxFileSize(long totalMaxFileSize)
其中QtotalMaxFileSize为允怸传的文g的总长度?BR>
1、setContentDisposition
作用Q将数据q加到MIME文g头的CONTENT-DISPOSITION域。jspSmartUploadlg?x)在q回下蝲的信息时自动填写MIME文g头的CONTENT-DISPOSITION域，如果用户需要添加额外信息，L(fng)此方法?nbsp;
原型Qpublic void setContentDisposition(String contentDisposition)
其中QcontentDispositiond的数据。如果contentDisposition为nullQ则lg自动添?attachment;"Q以表明下载的文g作ؓ(f)附gQ结果是IE览器将?x)提C另存文Ӟ而不是自动打开q个文gQIE览器一般根据下载的文g扩展名决定执行什么操作，扩展名ؓ(f)doc的将用wordE序打开Q扩展名为pdf的将用acrobatE序打开Q等{）(j)?nbsp;
2、downloadFile
作用Q下载文件?nbsp;
原型Q共有以下三个原型可用，W一个最常用Q后两个用于Ҏ(gu)情况下的文g下蝲Q如更改内容cdQ更改另存的文g名）(j)?nbsp;
?nbsp;public void downloadFile(String sourceFilePathName)
其中QsourceFilePathName下蝲的文件名Q带目录的文件全名）(j)
?nbsp;public void downloadFile(String sourceFilePathName,String contentType)
其中QsourceFilePathName下蝲的文件名Q带目录的文件全名）(j),contentType为内容类型（MIME格式的文件类型信息，可被览器识别）(j)?nbsp;
?nbsp;public void downloadFile(String sourceFilePathName,String contentType,String destFileName)
其中QsourceFilePathName下蝲的文件名Q带目录的文件全名）(j),contentType为内容类型（MIME格式的文件类型信息，可被览器识别）(j),destFileNameZ载后默认的另存文件名?nbsp;
三、文件上传篇
?nbsp;表单要求
对于上传文g的FORM表单Q有两个要求Q?nbsp;
1、METHOD应用POSTQ即METHOD="POST"?nbsp;
2、增加属性：(x)ENCTYPE="multipart/form-data"
下面是一个用于上传文件的FORM表单的例子：(x)
<FORM METHOD="POST" ENCTYPE="multipart/form-data"
ACTION="/jspSmartUpload/upload.jsp">
<INPUT TYPE="FILE" NAME="MYFILE">
<INPUT TYPE="SUBMIT">
</FORM>
?nbsp;上传的例?nbsp;
1、上传页面upload.html
本页面提供表单，让用户选择要上传的文gQ点?上传"按钮执行上传操作?nbsp;
面源码如下Q?nbsp;
<!--
文g名：(x)upload.html
?nbsp; 者：(x)U|软g制作中心(j)雨亦?zhsoft88@sohu.com)
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>文g上传</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<p> </p>
<p align="center">上传文g选择</p>
<FORM METHOD="POST" ACTION="jsp/do_upload.jsp"
ENCTYPE="multipart/form-data">
<input type="hidden" name="TEST" value="good">
<table width="75%" border="1" align="center">
<tr>
<td><div align="center">1?nbsp;
<input type="FILE" name="FILE1" size="30">
</div></td>
</tr>
<tr>
<td><div align="center">2?nbsp;
<input type="FILE" name="FILE2" size="30">
</div></td>
</tr>
<tr>
<td><div align="center">3?nbsp;
<input type="FILE" name="FILE3" size="30">
</div></td>
</tr>
<tr>
<td><div align="center">4?nbsp;
<input type="FILE" name="FILE4" size="30">
</div></td>
</tr>
<tr>
<td><div align="center">
<input type="submit" name="Submit" value="上传它！">
</div></td>
</tr>
</table>
</FORM>
</body>
</html>
2、上传处理页面do_upload.jsp
本页面执行文件上传操作。页面源码中详细介绍?jin)上传方法的用法Q在此不赘述?jin)?nbsp;
面源码如下Q?nbsp;
<%--
文g名：(x)do_upload.jsp
?nbsp; 者：(x)U|软g制作中心(j)雨亦?zhsoft88@sohu.com)
--%>
<%@ page contentType="text/html; charset=gb2312" language="java"
import="java.util.*,com.jspsmart.upload.*" errorPage="" %>
<html>
<head>
<title>文g上传处理面</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<%
// 新徏一个SmartUpload对象
SmartUpload su = new SmartUpload();
// 上传初始?BR>su.initialize(pageContext);
// 讑֮上传限制
// 1.限制每个上传文g的最大长度?BR>// su.setMaxFileSize(10000);
// 2.限制M传数据的长度?BR>// su.setTotalMaxFileSize(20000);
// 3.讑֮允许上传的文Ӟ通过扩展名限Ӟ(j),仅允许doc,txt文g?BR>// su.setAllowedFilesList("doc,txt");
// 4.讑֮止上传的文Ӟ通过扩展名限Ӟ(j),止上传带有exe,bat,
jsp,htm,html扩展名的文g和没有扩展名的文件?BR>// su.setDeniedFilesList("exe,bat,jsp,htm,html,,");
// 上传文g
su.upload();
// 上传文件全部保存到指定目录
int count = su.save("/upload");
out.println(count+"个文件上传成功！<br>");
// 利用Request对象获取参数之?BR>out.println("TEST="+su.getRequest().getParameter("TEST")
+"<BR><BR>");
// 逐一提取上传文g信息Q同时可保存文g?BR>for (int i=0;i<su.getFiles().getCount();i++)
{
com.jspsmart.upload.File file = su.getFiles().getFile(i);
// 若文件不存在则l?BR>if (file.isMissing()) continue;
// 昄当前文g信息
out.println("<TABLE BORDER=1>");
out.println("<TR><TD>表单名QF(tun)ieldNameQ?lt;/TD><TD>"
+ file.getFieldName() + "</TD></TR>");
out.println("<TR><TD>文g长度QSizeQ?lt;/TD><TD>" +
file.getSize() + "</TD></TR>");
out.println("<TR><TD>文g名（F(tun)ileNameQ?lt;/TD><TD>"
+ file.getFileName() + "</TD></TR>");
out.println("<TR><TD>文g扩展名（F(tun)ileExtQ?lt;/TD><TD>"
+ file.getFileExt() + "</TD></TR>");
out.println("<TR><TD>文g全名QF(tun)ilePathNameQ?lt;/TD><TD>"
+ file.getFilePathName() + "</TD></TR>");
out.println("</TABLE><BR>");
// 文件另?BR>// file.saveAs("/upload/" + myFile.getFileName());
// 另存CWEB应用E序的根目录为文件根目录的目录下
// file.saveAs("/upload/" + myFile.getFileName(),
su.SAVE_VIRTUAL);
// 另存到操作系l的根目录ؓ(f)文g根目录的目录?BR>// file.saveAs("c:\\temp\\" + myFile.getFileName(),
su.SAVE_PHYSICAL);
}
%>
</body>
</html>
四、文件下载篇
1、下载链接页面download.html
面源码如下Q?nbsp;
<!--
文g名：(x)download.html
?nbsp; 者：(x)U|软g制作中心(j)雨亦?zhsoft88@sohu.com)
-->
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>下蝲</title>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
</head>
<body>
<a href="jsp/do_download.jsp">点击下蝲</a>
</body>
</html>
2、下载处理页面do_download.jsp do_download.jsp展示?jin)如何利用jspSmartUploadlg来下载文Ӟ从下面的源码中就可以看到Q下载何其简单?nbsp;
源码如下Q?nbsp;
<%@ page contentType="text/html;charset=gb2312"
import="com.jspsmart.upload.*" %><%
// 新徏一个SmartUpload对象
SmartUpload su = new SmartUpload();
// 初始?BR>su.initialize(pageContext);
// 讑֮contentDisposition为null以禁止浏览器自动打开文gQ?BR>//保证点击链接后是下蝲文g。若不设定，则下载的文g扩展名ؓ(f)
//docӞ览器将自动用word打开它。扩展名为pdfӞ
//览器将用acrobat打开?BR>su.setContentDisposition(null);
// 下蝲文g
su.downloadFile("/upload/如何赚取我的W一桉.doc");
%>
注意Q执行下载的面Q在Java脚本范围外（?lt;% ... %>之外Q，不要包含HTML代码、空根{回车或换行{字W，有的话将不能正确下蝲。不信的话，可以在上q源码中%><%之间加入一个换行符Q再下蝲一下，保证出错。因为它影响?jin)返回给览器的数据(hu)，D解析出错?nbsp;
3、如何下载中文文?nbsp;
jspSmartUpload虽然能下载文Ӟ但对中文支持不。若下蝲的文件名中有汉字Q则览器在提示另存的文件名Ӟ昄的是一堆ؕ码，很扫人兴。上面的例子是q样。（q个问题?sh)是众多下蝲lg所存在的问题，很少有h解决Q搜索不到相兌料，可叹Q）(j)
Z(jin)ljspSmartUploadlg增加下蝲中文文g的支持，我对该组件进行了(jin)研究Q发现对q回l浏览器的另存文件名q行UTF-8~码后，览器便能正显CZ文名字了(jin)。这是一个o(h)人高兴的发现。于是我对jspSmartUploadlg的SmartUploadcd?jin)升U处理，增加?jin)toUtf8Stringq个Ҏ(gu)Q改动部分源码如下：(x)
public void downloadFile(String s, String s1, String s2, int i)
throws ServletException, IOException, SmartUploadException
{
if(s == null)
throw new IllegalArgumentException("File ''" + s +
"'' not found (1040).");
if(s.equals(""))
throw new IllegalArgumentException("File ''" + s +
"'' not found (1040).");
if(!isVirtual(s) && m_denyPhysicalPath)
throw new SecurityException("Physical path is
denied (1035).");
if(isVirtual(s))
s = m_application.getRealPath(s);
java.io.File file = new java.io.File(s);
FileInputStream fileinputstream = new FileInputStream(file);
long l = file.length();
boolean flag = false;
int k = 0;
byte abyte0[] = new byte[i];
if(s1 == null)
m_response.setContentType("application/x-msdownload");
else
if(s1.length() == 0)
m_response.setContentType("application/x-msdownload");
else
m_response.setContentType(s1);
m_response.setContentLength((int)l);
m_contentDisposition = m_contentDisposition != null ?
m_contentDisposition : "attachment;";
if(s2 == null)
m_response.setHeader("Content-Disposition",
m_contentDisposition + " filename=" +
toUtf8String(getFileName(s)));
else
if(s2.length() == 0)
m_response.setHeader("Content-Disposition",
m_contentDisposition);
else
m_response.setHeader("Content-Disposition",
m_contentDisposition + " filename=" + toUtf8String(s2));
while((long)k < l)
{
int j = fileinputstream.read(abyte0, 0, i);
k += j;
m_response.getOutputStream().write(abyte0, 0, j);
}
fileinputstream.close();
}
/**
* 文件名中的汉字转ؓ(f)UTF8~码的串,以便下蝲时能正确昄另存的文件名.
* U|软g制作中心(j)雨亦?003.08.01
* @param s 原文件名
* @return 重新~码后的文g?BR> */
public static String toUtf8String(String s) {
StringBuffer sb = new StringBuffer();
for (int i=0;i<s.length();i++) {
char c = s.charAt(i);
if (c >= 0 && c <= 255) {
sb.append(c);
} else {
byte[] b;
try {
b = Character.toString(c).getBytes("utf-8");
} catch (Exception ex) {
System.out.println(ex);
b = new byte[0];
}
for (int j = 0; j < b.length; j++) {
int k = b[j];
if (k < 0) k += 256;
sb.append("%" + Integer.toHexString(k).
toUpperCase());
}
}
}
return sb.toString();
}
注意源码中粗体部分，原jspSmartUploadlg对返回的文g未作M处理Q现在做?jin)编码的转换工作Q将文g名{换ؓ(f)UTF-8形式的编码Ş式。UTF-8~码对英文未作Q何处理，对中文则需要{换ؓ(f)%XX的Ş式。toUtf8StringҎ(gu)中，直接利用Java语言提供的编码{换方法获得汉字字W的UTF-8~码Q之后将其{换ؓ(f)%XX的Ş式?nbsp;
源码编译后打包成jspSmartUpload.jarQ拷贝到Tomcat的shared/lib目录下（可ؓ(f)所有WEB应用E序所׃nQ，然后重启Tomcat服务器就可以正常下蝲含有中文名字的文件了(jin)。另QtoUtf8StringҎ(gu)也可用于转换含有中文的超U链接，以保证链接的有效Q因为有的WEB服务器不支持中文链接?nbsp;
结QjspSmartUploadlg是应用JSPq行B/SE序开发过E中l常使用的上传下载组Ӟ它用简单，方便。现在我又ؓ(f)其加上了(jin)下蝲中文名字的文件的支持Q真个是如虎ȝQ必赢得更多开发者的青睐?/DIV>
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