package com.sun.util;
import java.io.File;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;
import java.security.MessageDigest;
import java.sql.Timestamp;
import java.text.NumberFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
/**
* 字符串操作通用類
*
* @author sunjun
* @version v5.0
*/
public class StringUtil {
// 字符串常量枚舉
public static enum REGEX_ENUM {
EMAIL("^\\w+([-+.']\\w+)*@\\w+([-.]\\w+)*\\.\\w+([-.]\\w+)*$"), CHINESE_CHARACTER(
"[\\u4E00-\\u9FA5]+");
private String value;
private REGEX_ENUM(String value) {
this.value = value;
}
public String toString() {
return this.value;
}
};
/**
* 檢查字符串str是否匹配正則表達式regex
*
* @param regex
* @param str
* @return
*/
public static boolean matcherRegex(String regex, String str) {
Pattern pattern = Pattern.compile(regex);
Matcher matcher = pattern.matcher(str);
return matcher.matches();
}
/**
* 是否為漢字
*
* @param ch
* @return
*/
public static boolean isChineseCharacter(char ch) {
return matcherRegex(REGEX_ENUM.CHINESE_CHARACTER.toString(), String
.valueOf(ch));
}
/**
* 按字節截取字符串
*
* @param str
* 要截取的字符串
* @param byteLength
* 長度
* @return 結果字符串
*/
public static String subString(String str, int byteLength) {
if (isBlank(str))
return "";
if (str.getBytes().length <= byteLength)
return str;
if (str.length() >= byteLength)
str = str.substring(0, byteLength);
int readLen = 0;
String c = null;
StringBuffer sb = new StringBuffer("");
for (int i = 0; i < str.length(); i++) {
c = String.valueOf(str.charAt(i));
readLen += c.getBytes().length;
if (readLen > byteLength)
return sb.toString();
sb.append(c);
}
return sb.toString();
}
/**
* 檢查字符串長度是否在指定長度范圍內(minLength<=str.length<=maxLength)
*
* @param str
* 要檢查的字符串
* @param minLength
* 最小長度
* @param maxLength
* 最大長度
* @return boolean 字符串長度在指定長度范圍內返回true，否則返回false
*/
public static boolean checkLength(String str, int minLength, int maxLength) {
if (isBlank(str))
return false;
int len = str.length();
if (minLength == 0)
return len <= maxLength;
else if (maxLength == 0)
return len >= minLength;
else
return (len >= minLength && len <= maxLength);
}
/**
* 按UTF-8編碼來解碼字符串
*
* @param str
* 要解碼的字符串
* @return String 解碼str后字符串
*/
public static String decodeString(String str) {
return decodeString(str, "UTF-8");
}
/**
* 按指定編碼來解碼字符串
*
* @param str
* @param encoding
* @return
*/
public static String decodeString(String str, String encoding) {
if (isBlank(str))
return "";
try {
return URLDecoder.decode(str.trim(), encoding);
} catch (UnsupportedEncodingException e) {
}
return "";
}
/**
* 按指定編碼來解碼字符串
*
* @param str
* @param encoding
* @return
*/
public static String decodeURI(String str) {
if (isBlank(str))
return "";
try {
return new String(str.getBytes("ISO8859-1"), "UTF-8");
} catch (UnsupportedEncodingException e) {
}
return "";
}
/**
* 按UTF-8編碼來編碼字符串
*
* @param str
* 要編碼的字符串
* @return String 編碼str后字符串
*/
public static String encodeString(String str) {
return encodeString(str, "UTF-8");
}
/**
* 按UTF-8編碼來編碼字符串
*
* @param str
* 要編碼的字符串
* @return String 編碼str后字符串
*/
public static String encodeString(String str, String encoding) {
if (isBlank(str))
return "";
try {
return URLEncoder.encode(str.trim(), encoding);
} catch (UnsupportedEncodingException e) {
}
return "";
}
/**
* 根據時間得到唯一字符串
*
* @return
*/
public static String getOnlyString() {
return String.valueOf(System.currentTimeMillis());
}
/**
* 檢查對象obj是否為空
*
* @param str
* 要檢查的字符串
* @return boolean str為空返回true，否則返回false
*/
public static boolean isBlank(Object obj) {
if (obj == null)
return true;
if (obj instanceof String && obj.toString().trim().length() == 0)
return true;
return false;
}
/**
* 檢查字符串str是否為整型
*
* @param str
* 要檢查的字符串
* @return boolean str為整型返回true，否則返回false
*/
public static boolean isInteger(String str) {
if (isBlank(str))
return false;
try {
Integer.parseInt(str.trim());
return true;
} catch (Exception e) {
}
return false;
}
/**
* 檢查字符串str是否為長整型
*
* @param str
* 要檢查的字符串
* @return boolean str為長整型返回true，否則返回false
*/
public static boolean isLong(String str) {
if (isBlank(str))
return false;
try {
Long.parseLong(str.trim());
return true;
} catch (Exception e) {
}
return false;
}
/**
* 檢查字符串str是否為布爾型
*
* @param str
* 要檢查的字符串
* @return boolean str為布爾型返回true，否則返回false
*/
public static boolean isBoolean(String str) {
if (isBlank(str))
return false;
try {
Boolean.parseBoolean(str.trim());
return true;
} catch (Exception e) {
}
return false;
}
/**
* 檢查字符串str是否為double類型
*
* @param str
* @return
*/
public static boolean isDouble(String str) {
if (isBlank(str))
return false;
try {
Double.parseDouble(str.trim());
return true;
} catch (Exception e) {
}
return false;
}
/**
* 檢查字符串str是否為時間型
*
* @param str
* 要檢查的字符串
* @return boolean str為時間型返回true，否則返回false
*/
public static boolean isDate(String str) {
if (isBlank(str))
return false;
try {
java.sql.Date sqlDate = java.sql.Date.valueOf(str.trim());
return true;
} catch (Exception e) {
}
return false;
}
/**
* 檢查對象數組strings的每個元素是否為空
*
* @param objs
* 要檢查的對象數組
* @return boolean objs數組元素為空返回true，否則返回false
*/
public static boolean isBlanks(Object... objs) {
for (Object obj : objs) {
if (StringUtil.isBlank(obj))
return true;
}
return false;
}
/**
* 檢查字符串數組str是否為長整型數組
*
* @param str
* 要檢查的字符串
* @return boolean str為長整型數組返回true，否則返回false
*/
public static boolean isLongs(String str[]) {
for (int i = 0; i < str.length; i++) {
if (!isLong(str[i]))
return false;
}
return true;
}
/**
* 檢查字符串數組str是否為整型數組
*
* @param str
* 要檢查的字符串
* @return boolean str為整型數組返回true，否則返回false
*/
public static boolean isIntegers(String str[]) {
for (int i = 0; i < str.length; i++)
if (!isInteger(str[i]))
return false;
return true;
}
/**
* 檢查字符串數組str是否為布爾型數組
*
* @param str
* 要檢查的字符串
* @return boolean str為布爾型數組返回true，否則返回false
*/
public static boolean isBooleans(String str[]) {
for (int i = 0; i < str.length; i++)
if (!isBoolean(str[i]))
return false;
return true;
}
/**
* 檢查字符串str是否為時間
*
* @param str
* 要檢查的字符串
* @return str為時間型返回true，否則返回false
*/
public static boolean isTimestamp(String str) {
if (isBlank(str))
return false;
try {
java.sql.Date d = java.sql.Date.valueOf(str.trim());
return true;
} catch (Exception ex) {
}
return false;
}
/**
* 檢查字符串str是否為(yyyy-MM-dd HH:mm:ss)模式的時間
*
* @param str
* 要檢查的字符串
* @return str為時間型返回true，否則返回false
*/
public static boolean isFullTimestamp(String str) {
if (isBlank(str))
return false;
try {
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date = format.parse(str.trim());
return date != null;
} catch (Exception e) {
}
return false;
}
/**
* 將字符數組轉換為長整型數組
*
* @param str
* 字符數組
* @return Long[] 長整型數組
*/
public static Long[] stringsToLongs(String str[]) {
Long lon[] = new Long[str.length];
for (int i = 0; i < lon.length; i++)
lon[i] = new Long(str[i]);
return lon;
}
/**
* 將字符數組轉換為整型數組
*
* @param str
* 字符數組
* @return Integer[] 整型數組
*/
public static Integer[] stringsToIntegers(String str[]) {
Integer array[] = new Integer[str.length];
for (int i = 0; i < array.length; i++)
array[i] = new Integer(str[i]);
return array;
}
/**
* 將字符數組轉換為布爾型數組
*
* @param str
* 字符數組
* @return Boolean[] 布爾型數組
*/
public static Boolean[] stringsToBooleans(String str[]) {
Boolean array[] = new Boolean[str.length];
for (int i = 0; i < array.length; i++)
array[i] = new Boolean(str[i]);
return array;
}
/**
* 將字符數組轉換為浮點型數組
*
* @param str
* 字符數組
* @return double[] 浮點型數組
*/
public static double[] stringsToDoubles(String str[]) {
double array[] = new double[str.length];
for (int i = 0; i < array.length; i++)
array[i] = Double.parseDouble(str[i]);
return array;
}
/**
* 根據指定時間和格式字符串得到時間格式字符串
*
* @param d
* 時間
* @param pattern
* 格式字符串
* @return String 時間格式字符串
*/
public static String formatDate(Date d, String pattern) {
if (isBlank(d))
return "";
SimpleDateFormat format = new SimpleDateFormat(
isBlank(pattern) ? "yyyy-MM-dd HH-mm-ss" : pattern);
return format.format(d);
}
/**
* 根據時間字符串得到時間(yyyy-MM-dd)
*
* @param str
* 時間字符串
* @return Timestamp 時間
*/
public static Timestamp getTimestamp(String str) {
try {
Date d = java.sql.Date.valueOf(str.trim());
return new Timestamp(d.getTime());
} catch (Exception ex) {
}
return null;
}
/**
* 根據時間字符串得到(yyyy-MM-dd HH-mm-ss)格式時間
*
* @param str
* 時間字符串
* @return Timestamp 時間
*/
public static Timestamp getFullTimestamp(String str) {
try {
SimpleDateFormat format = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");
Date date = format.parse(str.trim());
return new Timestamp(date.getTime());
} catch (Exception ex) {
}
return null;
}
/**
* 得到數字格式化后的字符串
*
* @param number
* Number類型
* @param minFractionDigits
* 小數最小位數
* @param maxFractionDigits
* 小數最大位數
* @return String 格式化后的字符串
*/
public static String formatNumber(Number number, int minFractionDigits,
int maxFractionDigits) {
NumberFormat format = NumberFormat.getInstance();
format.setMinimumFractionDigits(minFractionDigits);
format.setMaximumFractionDigits(maxFractionDigits);
return format.format(number);
}
/**
* 字符串高亮<br>
* 解決了高亮前綴或高亮后綴在要高亮顯示的字符串數組在存在時的問題，根據本算法可解決JS高亮顯示時相同的問題
*
* @param text
* 內容
* @param replaceStrs
* 要高亮顯示的字符串數組
* @param beginStr
* 高亮前綴，如<font color=red>
* @param endStr
* 高亮后綴，如</font>
* @return
*/
public static String heightLight(String text, String[] replaceStrs,
String beginStr, String endStr) {
if (text.length() == 0)
return text;
StringBuilder str = new StringBuilder();
for (int i = 0; i < replaceStrs.length; i++) {
String replaceStr = replaceStrs[i];
int index = text.indexOf(replaceStr);
if (index >= 0) {
String afterStr = null;
if (index > 0) {
String beforeStr = text.substring(0, index);
afterStr = text.substring(index + replaceStr.length());
str.append(heightLight(beforeStr, replaceStrs, beginStr,
endStr));
} else
afterStr = text.substring(replaceStr.length());
str.append(beginStr).append(replaceStr).append(endStr);
str
.append(heightLight(afterStr, replaceStrs, beginStr,
endStr));
break;
}
}
if (str.length() == 0)
return text;
return str.toString();
}
/**
* 替換指定的字符串數組為一個字符串<br>
* 速度比String.replaceAll快3倍左右，比apache-common StringUtils.replace快2倍左右
*
* @param text
* @param replaceStrs
* @param newStr
* @return
*/
public static String replaceAll(String text, String[] replaceStrs,
String newStr) {
if (text.length() == 0)
return text;
StringBuilder str = new StringBuilder();
for (int i = 0; i < replaceStrs.length; i++) {
String replaceStr = replaceStrs[i];
int index = text.indexOf(replaceStr);
if (index >= 0) {
String afterStr = null;
if (index > 0) {
String beforeStr = text.substring(0, index);
afterStr = text.substring(index + replaceStr.length());
str.append(replaceAll(beforeStr, replaceStrs, newStr));
} else
afterStr = text.substring(replaceStr.length());
str.append(newStr);
str.append(replaceAll(afterStr, replaceStrs, newStr));
break;
}
}
if (str.length() == 0)
return text;
return str.toString();
}
/**
* 替換指定的字符串為一個字符串<br>
* 速度比String.replaceAll快3倍左右，比apache-common StringUtils.replace快2倍左右
*
* @param text
* @param replaceStr
* @param newStr
* @return
*/
public static String replaceAll(String text, String replaceStr,
String newStr) {
if (text.length() == 0)
return text;
StringBuilder str = new StringBuilder();
int index = text.indexOf(replaceStr);
if (index >= 0) {
String afterStr = null;
if (index > 0) {
String beforeStr = text.substring(0, index);
afterStr = text.substring(index + replaceStr.length());
str.append(replaceAll(beforeStr, replaceStr, newStr));
} else
afterStr = text.substring(replaceStr.length());
str.append(newStr);
str.append(replaceAll(afterStr, replaceStr, newStr));
}
if (str.length() == 0)
return text;
return str.toString();
}
/**
* 替換指定的字符串數組為一個字符串數組<br>
* 速度比String.replaceAll快3倍左右，比apache-common StringUtils.replace快2倍左右
*
* @param text
* @param replaceStrs
* @param newStrs
* @return
*/
public static String replaceAllArray(String text, String[] replaceStrs,
String[] newStrs) {
if (text.length() == 0)
return text;
StringBuilder str = new StringBuilder();
for (int i = 0; i < replaceStrs.length; i++) {
String replaceStr = replaceStrs[i];
int index = text.indexOf(replaceStr);
if (index >= 0) {
String afterStr = null;
if (index > 0) {
String beforeStr = text.substring(0, index);
afterStr = text.substring(index + replaceStr.length());
str
.append(replaceAllArray(beforeStr, replaceStrs,
newStrs));
} else
afterStr = text.substring(replaceStr.length());
str.append(newStrs[i]);
str.append(replaceAllArray(afterStr, replaceStrs, newStrs));
break;
}
}
if (str.length() == 0)
return text;
return str.toString();
}
/**
* 解碼HTML(將>,<,",&轉換成>,<,",& )
*
* @param html
* @return
*/
public static String decodeHTML(String html) {
if (isBlank(html))
return "";
String[] replaceStr = { "&", "<", ">", """ };
String[] newStr = { "&", "<", ">", "\"" };
return replaceAllArray(html, replaceStr, newStr);
}
/**
* 編碼HTML(將>,<,",&
* 轉換成>,<,",&)(高效率，來自FreeMarker模板源碼，比replaceAll速度快很多)
*
* @param html
* @return
*/
public static String encodeHTML(String html) {
if (isBlank(html))
return "";
int ln = html.length();
char c;
StringBuffer b;
for (int i = 0; i < ln; i++) {
c = html.charAt(i);
if (c == '<' || c == '>' || c == '&' || c == '"') {
b = new StringBuffer(html.substring(0, i));
switch (c) {
case '<':
b.append("<");
break;
case '>':
b.append(">");
break;
case '&':
b.append("&");
break;
case '"':
b.append(""");
break;
}
i++;
int next = i;
while (i < ln) {
c = html.charAt(i);
if (c == '<' || c == '>' || c == '&' || c == '"') {
b.append(html.substring(next, i));
switch (c) {
case '<':
b.append("<");
break;
case '>':
b.append(">");
break;
case '&':
b.append("&");
break;
case '"':
b.append(""");
break;
}
next = i + 1;
}
i++;
}
if (next < ln)
b.append(html.substring(next));
html = b.toString();
break;
}
}
return html;
}
/**
* MD5加密
*
* @param plainText
* 要加密的字符串
* @return 加密后的字符串
*/
public static String Md5(String plainText) {
StringBuffer buf = new StringBuffer("");
try {
MessageDigest md = MessageDigest.getInstance("MD5");
md.update(plainText.getBytes());
byte b[] = md.digest();
int i = 0;
for (int offset = 0; offset < b.length; offset++) {
i = b[offset];
if (i < 0)
i += 256;
if (i < 16)
buf.append("0");
buf.append(Integer.toHexString(i));
}
} catch (Exception e) {
e.printStackTrace();
}
return buf.toString();
}
/**
* MD5加密(32)
*
* @param plainText
* 要加密的字符串
* @return
*/
public final static String MD5(String plainText) {
char hexDigits[] = { '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
'a', 'b', 'c', 'd', 'e', 'f' };
try {
byte[] strTemp = plainText.getBytes();
MessageDigest mdTemp = MessageDigest.getInstance("MD5");
mdTemp.update(strTemp);
byte[] md = mdTemp.digest();
int j = md.length;
char str[] = new char[j * 2];
int k = 0;
for (int i = 0; i < j; i++) {
byte byte0 = md[i];
str[k++] = hexDigits[byte0 >>> 4 & 0xf];
str[k++] = hexDigits[byte0 & 0xf];
}
return new String(str);
} catch (Exception e) {
}
return "";
}
}