java String 转utf-8编码

/**
* Get XML String of utf-8
* 
* @return XML-Formed string
*/
public static String getUTF8XMLString(String xml) {
    // A StringBuffer Object
    StringBuffer sb = new StringBuffer();
    sb.append(xml);
    String xmString = "";
    String xmlUTF8="";
    try {
        xmString = new String(sb.toString().getBytes("UTF-8"));
        xmlUTF8 = URLEncoder.encode(xmString, "UTF-8");
        System.out.println("utf-8 编码：" + xmlUTF8) ;
    } catch (UnsupportedEncodingException e) {
        // TODO Auto-generated catch block
         e.printStackTrace();
    }
         // return to String Formed
         return xmlUTF8;
}

utf-8转Java String

 /**
* @param fromStr : 要转换的原始字符串
* @return : 得到转换后的字符串
 */
private String is(String fromStr) {
  StringBuffer stringBufferResult = new StringBuffer();
    for (int i = 0; i < fromStr.length(); i++) {
        char chr = fromStr.charAt(i);
        if (chr == '%') {
            StringBuffer stringTmp = new StringBuffer();
            stringTmp.append(fromStr.charAt(i + 1)).append(fromStr.charAt(i + 2));
        //转换字符，16进制转换成整型
            stringBufferResult.append((char) (Integer.valueOf(stringTmp.toString(), 16).intValue()));
             i = i + 2;
            continue;
        }
        stringBufferResult.append(chr);
    }

    String newStr = null; //编码转换
    try {
        newStr = new String(stringBufferResult.toString().getBytes("Cp1252"), "UTF-8");
    } catch (UnsupportedEncodingException e) {
        e.printStackTrace();
     }
    return newStr;
}