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jdk 5.0中文文档下蝲

剑事 — Tue, 20 Dec 2005 01:17:00 GMT

BR>完整版中文版
http://www.migti.com/download.ww

下蝲暂停

剑事 2005-12-20 09:17 发表评论

剑事 — Tue, 06 Dec 2005 15:55:00 GMT

JFreeChart 文字模糊问题不��o人满意，�|�上有提到用修改字体的方式来改善�Q�感觉还是效果不怎么��P��所以��l�测试，扑ֈ�了比较满意的解决�Ҏ(gu��)��
下面�q�个图是默认情况下显�C�的字体

下面�q�个是改成黑体字候的昄��情况

可以看到�Ҏ(gu��)��黑体后效果有所改善�Q�不�q�还是有�Ҏ(gu��)��p?BR>�l�箋看下一�?BR>
�q�个是修�Ҏ(gu��)��染参数后的效�?nbsp; 可以看到文字很清��C��Q�实际上和PHOTOSHOP里吧文字讄��成名晰是一��L��。将文字的抗锯��参数关闭�?BR>控制�q�一功能的类��是RenderingHints
��jfreechart里RenderingHints做文字渲染参数的修改
jfreechart.getRenderingHints().put(RenderingHints.KEY_TEXT_ANTIALIASING,RenderingHints.VALUE_TEXT_ANTIALIAS_OFF);

VALUE_TEXT_ANTIALIAS_OFF表示��文字的抗锯齿关�?
使用的关闭抗锯��后，字体��量选择12�?4��L��宋体字�?BR>�q�样文字最清晰好看

剑事 2005-12-06 23:55 发表评论

可能是dom4j的BUG

剑事 — Thu, 20 Oct 2005 14:55:00 GMT

}
}

    public int writeToFile() {
        int returnValue = 0;
        try {
            XMLWriter writer = new XMLWriter(new FileWriter(new File(filename)));
            writer.write(document);
            writer.close();
            returnValue = 1;
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return returnValue;
    }

    public int formatXMLFile(String filename) {
        int returnValue = 0;
        try {
            SAXReader saxReader = new SAXReader();
            Document document = saxReader.read(new File(filename));
            XMLWriter output = null;
            OutputFormat format = OutputFormat.createPrettyPrint();
            format.setEncoding("GBK");
            output = new XMLWriter(new FileWriter(new File(filename)), format);
            output.write(document);
            output.close();
            returnValue = 1;
        } catch (Exception ex) {
            ex.printStackTrace();
        }
        return returnValue;
    }

}

剑事 2005-10-20 22:55 发表评论

JDBC��单封�?节省大量代码

剑事 — Sun, 11 Sep 2005 12:15:00 GMT

��Z��提高写程序效率，做了一个简单的��装JDBC�c?BR>
SqLModify.java

使用�Ҏ(gu��)��

SqLModify.modify("insert into usertable(username,password)values('lucy','123456')");
�q�个是静态方法的调用可以执行insert   update 和直接调用jdbc方式比少写了很多的代�?BR>
��Z��防止�Ҏ(gu��)��字符 �?SQL注入可以用另外的调用方式
SqLModify sqlcom = new SqlModify(true); //true表示建立�q�接
sqlcom.setSql("insert into usertable(username,password)values(?,?)");
sqlcom.setString(1,"lucy");
sqlcom.setString(2,"123456");
sqlcom.exesqlandClose();

如果是插入多条记录可以��用��@�?BR>
SqLModify sqlcom = new SqlModify(true); //true表示建立�q�接
sqlcom.setSql("insert into usertable(username,password)values(?,?)");
for(int i=0;i<30;i++)
{

   sqlcom.setString(1,"lucy");
   sqlcom.setString(2,"123456");
   sqlcom.exesql();
}
sqlcom.closeall();

SqlModify.java
代码

import conn.DBConnManager;

import java.sql.Connection;
import java.sql.PreparedStatement;

public class SqlModify
{
private String SQL;
static SqlModify sqlcom = null;
private DBConnManager conn = null;
private Connection con = null;
private PreparedStatement stmt = null;

public SqlModify()
{

}
public SqlModify(boolean connect)
{
  if(connect)
   connect();
}
public static int modify(String sqlStr)
{
  if(sqlcom==null)
   sqlcom = new SqlModify();
  return sqlcom.exec(sqlStr);
}
public PreparedStatement getStmt()
{
  return stmt;
}
public void connect(String sqlStr)
{
  try{
   connect();
   stmt = con.prepareStatement(sqlStr);
  }catch(Exception e){
   e.printStackTrace();
  }
}
public void connect()
{
  try{
   conn = DBConnManager.getInstance();
   con = conn.getConnection("mssql");
  }catch(Exception e){

  }
}
public int exesqlandClose()
{
  int result = exesql();
  closeall();
  return result;
}
public int exesql()
{
  try{
   return stmt.executeUpdate();
  }catch(Exception e){
   e.printStackTrace();
   return -1;
  }
}
public void setSql(String sql)
{
  try{
   stmt = con.prepareStatement(sql);
  }catch(Exception e){
   e.printStackTrace();
  }finally{

  }
}
public int exec(String sqlStr)
{
  int flag=-2;

  try{
   connect(sqlStr);
   int value=stmt.executeUpdate();
   flag=value;
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }finally{
   closeall();
  }
  return flag;
}
public void closeall()
{
  try{
   if(stmt!=null)
   {
    stmt.close();
   }
   if(conn!=null)
   {
    conn.releaseConnection("mssql",con);
   }

  }catch(Exception e){
   e.printStackTrace();
  }
}
public void setString(int col,String value)
{
  try{
   stmt.setString(col,value);
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }
}
public void setInt(int col,int value)
{

  try{
   stmt.setInt(col,value);
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }

}
public void setLong(int col,long value)
{
  try{
   stmt.setLong(col,value);
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }
}
public void setFloat(int col,float value)
{
  try{
   stmt.setFloat(col,value);
  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }
}
}

剑事 2005-09-11 20:15 发表评论

剑事 — Sun, 28 Aug 2005 14:35:00 GMT

下蝲�|�站
http://www.enterprisedt.com/products/edtftpj/overview.html

FTPClient ftp new FTPClient("211.136.186.169");建立�q�接
ftp.login("username","password"); ��d��
ftp.get("to file","from ftp file"]); 下蝲文�g
ftp.put("file1","file2"); 上传文�g

剑事 2005-08-28 22:35 发表评论

剑事 — Thu, 02 Jun 2005 01:03:00 GMT

记忆��d��跌��{可以打打方便用户使用
getHeader("Referer");方式��单不�q�不能处理post的参�?BR>本来都是用在struts,webwork里的�Q��ؓ了容易看明白改写成jsp方式�?BR>
-------------------------------------------------------------------------------------------------------------
member.jsp   //session限制讉K��?BR>
<%
String url = ""
if(session.getAttribute("username")==null)
{
         url = myRedirect.dealurl(request);//记录当前地址和请求参敎ͼ�dealurl��实际url处理了避免和要请求url有干�?因�ؓ会有& 字符
         response.sendRedirect("weblogin.jsp?url�Q?+url) ;//重定向到��d��面
}
%>
-------------------------------------------------------------------------------------------
weblogin.jsp

<%
String url = request.getParameter("url");
String userid =request.getParameter("userid");
String password =request.getParameter("password");
if(userid!=null) //如果是登录提交执行下面代�?BR>{

if(��d��成功)
  {
   session.setAttribute("userid",userid);
   out.println("");//转向到首�ơ请求的url�Q?geturl(url)是把转化�q�的地址转化回来变成真实url.
  }else{
   out.println("");
  }
}else{//如果不是��d��提交昄��现面��d��界面
%>

�(zh��n)�还没有��d��Q�请先登�?lt;br>
















    �q�里要有个hidden来保存一下，不然提交��没�?BR>

�?amp;nbsp;��P��
�?amp;nbsp;码：
没有注册
扑֛�密码

<%
}
%>

-------------------------------------------------------------------------------------------------------

myRedirect.java

package com.util;

import javax.servlet.http.HttpServletRequest;
import java.util.Enumeration;

public class myRedirect    //对url的�{换类
{
public static String dealurl(HttpServletRequest request)
{
  String url = "";
  url = request.getRequestURL()+"?";
  url +=param(request);
  if(url.indexOf("&")>-1)
   url=url.replaceAll("&","@#@");//实际上就是把�?amp;的字�W��{化成了@#@
  return url;
}
public static String geturl(String url)//�q�个是还原方�?BR> {
  if(url.indexOf("@#@")>-1)
   url=url.replaceAll("@#@","&");
  return url;
}
public static String param(HttpServletRequest request)
{
  String url = "";
  Enumeration param = request.getParameterNames();//得到所有参数名
  while(param.hasMoreElements())
  {
   String pname = param.nextElement().toString();
   url += pname+"="+request.getParameter(pname)+"&";
  }
  if(url.endsWith("&"))
  {
   url = url.substring(0,url.lastIndexOf("&"));
  }
  return url;
}
}
�q�样��d��览器就会自动�{到用户刚刚请求的地址

剑事 2005-06-02 09:03 发表评论

剑事 — Sat, 14 May 2005 01:03:00 GMT

onunload调用下面js函数

if(event.clientX<0&&event.clientY<0)判断��览器是关闭�q�是��h�� Q�因为刷��C��会调用onunload

document.all.WebBrowser.ExecWB(45,1);是无提示的关闭浏览器

removeline.jsp 加上invalidate()代码��可以了

剑事 2005-05-14 09:03 发表评论

剑事 — Wed, 11 May 2005 16:23:00 GMT

原理��是用Map存放单条数据然后攑ֈ�List�?/P>

用�v来可以这栯��?nbsp; List list = rs.selectRS(sqlStr);

for(int i=0;i{
((Map)list.get(i)).get("username");
}
�q�样的话��׃��用每�ơ在写数据库�q�接了，而且有比较复杂的��面格式输出��可以通过�?i 的控制来实现�?/P>

下面是具体实现类可以�l�合struts,webwork2的标�{�来用，我已�l�测试过了没问题
我也看到一些�h是自己写�c�L��代替Map来用�?/P>

package com;

import conn.DBConnManager;
import java.sql.*;
import java.util.*;

public class ResultGather
{
private String sql;
public ResultGather()
{

}
public ResultGather(String sqlcom)
{
  this.sql=sqlcom;
}
public List selectRS(String sqlStr)
{
  this.sql = sqlStr;
  return selectRS();
}
public List selectRS()
{
  List rsall = new ArrayList();
  Map rsTree;
  DBConnManager conn = null;
  Connection con = null;
  Statement stmt = null;
  ResultSet rs = null;
  try{
   conn = DBConnManager.getInstance();
   con = conn.getConnection("mssql");
   stmt = con.createStatement();
   rs = stmt.executeQuery(sql);
   ResultSetMetaData rsmd = rs.getMetaData();//取数据库的列�?nbsp; 我觉得名�?�Q?�Q?..更好�?BR>   int numberOfColumns = rsmd.getColumnCount();
   while(rs.next())
   {
   rsTree = new HashMap(numberOfColumns);//注意要new
     for(int r=1;r     {
      rsTree.put(rsmd.getColumnName(r),rs.getObject(r));
     }
     rsall.add(rsTree);
   }

  }catch(java.lang.Exception ex){
   ex.printStackTrace();
  }finally{
   try{
    if(rs!=null)
     rs.close();
    if(stmt!=null)
     stmt.close();
    if(conn!=null)
     conn.releaseConnection("mssql",con);
   }catch(Exception e){

   }
  }
  return rsall;
}
}

��单的东西交流交流

剑事 2005-05-12 00:23 发表评论

java实现URL带参数请�?get/post)

剑事 — Wed, 11 May 2005 07:37:00 GMT

param 为aaa=111&bbb=222.....格式

-------------------------------------------------
public static String sendGet(String url,String param)
{
  String result = "";
  try{
   String urlName = url + "?"+param;//

   URL U = new URL(urlName);
   URLConnection connection = U.openConnection();
   connection.connect();

   BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
   String line;
   while ((line = in.readLine())!= null)
   {
    result += line;
   }
   in.close();
  }catch(Exception e){
   System.out.println("没有�l�果�Q?+e);
  }
  return result;
}

public static String sendPost(String url,String param)
{
  String result="";
  try{
   URL httpurl = new URL(url);
   HttpURLConnection httpConn = (HttpURLConnection)httpurl.openConnection();
   httpConn.setDoOutput(true);
   httpConn.setDoInput(true);
   PrintWriter out = new PrintWriter(httpConn.getOutputStream());
   out.print(param);
   out.flush();
   out.close();
   BufferedReader in = new BufferedReader(new InputStreamReader(httpConn.getInputStream()));
   String line;
   while ((line = in.readLine())!= null)
   {
    result += line;
   }
   in.close();
  }catch(Exception e){
   System.out.println("没有�l�果�Q?+e);
  }
  return result;
}

剑事 2005-05-11 15:37 发表评论

一个比较简单的输出m行n列表格的�Ҏ(gu��)��

剑事 — Wed, 11 May 2005 07:31:00 GMT

<%
for(int i=0;i<10;i++)
{
     if(i!=0&&i%3==0)
          out.println("");
%>

<%
}
%>

<%=i%>