java unicode 汉字 java unicode转汉字

import java.io.UnsupportedEncodingException;

public class TestUnicode{

public static void main(String[] args) throws UnsupportedEncodingException {
    String s = "简介";
    System.out.println(s+" --的unicode编码是："+gbEncoding(s));
    System.out.println(gbEncoding(s) + " --转换成中文是："+decodeUnicode(gbEncoding(s)));
    
    //System.out.println(gbEncoding(s) + " --转换成中文是："+decodeUnicode("\\u7b80\\u4ecb"));
}

/*
 * 中文转unicode编码
 */
public static String gbEncoding(final String gbString) {
    char[] utfBytes = gbString.toCharArray();
    String unicodeBytes = "";
    for (int i = 0; i < utfBytes.length; i++) {
        String hexB = Integer.toHexString(utfBytes[i]);
        if (hexB.length() <= 2) {
            hexB = "00" + hexB;
        }
        unicodeBytes = unicodeBytes + "\\\\u" + hexB;
    }
    return unicodeBytes;
}
/*
 * unicode编码转中文
 */
public static String decodeUnicode(final String dataStr) {
    int start = 0;
    int end = 0;
    final StringBuffer buffer = new StringBuffer();
    while (start > -1) {
        end = dataStr.indexOf("\\u", start + 2);
        String charStr = "";
        if (end == -1) {
            charStr = dataStr.substring(start + 2, dataStr.length());
        } else {
            charStr = dataStr.substring(start + 2, end);
        }
        char letter = (char) Integer.parseInt(charStr, 16); // 16进制parse整形字符串。
        buffer.append(new Character(letter).toString());
        start = end;
    }
    return buffer.toString();
}

/**
* 处理字符串 将字符串中的unicode字符转为汉字
* @param asciicode
* @return
*/

public static String ascii2native ( String asciicode )
{
    String[] asciis = asciicode.split ("\\\\u");
    StringBuffer nativeValue = new StringBuffer();
     nativeValue.append(asciis[0]) ;
    try
    {
        for ( int i = 1; i < asciis.length; i++ )
        {
            String code = asciis[i];
            nativeValue.append((char) Integer.parseInt (code.substring (0, 4), 16));
            if (code.length () > 4)
            {
                nativeValue.append(code.substring (4, code.length ())) ;
            }
        }
    }
    catch (NumberFormatException e)
    {
        return asciicode;
    }
    return nativeValue.toString();
}

}