java 中文与Unicode互转

package com.tuan.util;

/*
 * string涓巙nicode涔嬮棿鐩镐簰杞崲
 */
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class UnicodeString {
	
	//转换为unicode
	public static String encodeUnicode(final String gbString) {   
        char[] utfBytes = gbString.toCharArray();   
        String unicodeBytes = "";   
        for (int byteIndex = 0; byteIndex < utfBytes.length; byteIndex++) {   
            String hexB = Integer.toHexString(utfBytes[byteIndex]);   
            if (hexB.length() <= 2) {   
                hexB = "00" + hexB;   
            }   
            unicodeBytes = unicodeBytes + "\\u" + hexB;   
        }   
        return unicodeBytes;
    }  
	
	//unicode转化汉字   
    public static StringBuffer decodeUnicode(final String dataStr) {   
        final StringBuffer buffer = new StringBuffer();   
        String tempStr = "";   
        String operStr = dataStr;   
        if (operStr != null && operStr.indexOf("\\u") == -1)   
            return buffer.append(operStr);   
        if (operStr != null && !operStr.equals("")   
                && !operStr.startsWith("\\u")) {   
            tempStr = operStr.substring(0, operStr.indexOf("\\u"));   
            operStr = operStr.substring(operStr.indexOf("\\u"), operStr.length());// operStr字符一定是以unicode编码字符打头的字符串   
        }   
        buffer.append(tempStr);   
        // 循环处理,处理对象一定是以unicode编码字符打头的字符串   
        while (operStr != null && !operStr.equals("")&& operStr.startsWith("\\u")) {    
            tempStr = operStr.substring(0, 6);   
            operStr = operStr.substring(6, operStr.length());   
            String charStr = "";   
            charStr = tempStr.substring(2, tempStr.length());   
            char letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。   
            buffer.append(new Character(letter).toString());   
            if (operStr.indexOf("\\u") == -1) {   
                buffer.append(operStr);   
            } else { // 处理operStr使其打头字符为unicode字符   
                tempStr = operStr.substring(0, operStr.indexOf("\\u"));   
                operStr = operStr.substring(operStr.indexOf("\\u"), operStr.length());   
                buffer.append(tempStr);   
            }   
        }   
        return buffer;   
    }  


}