java String编码转换

[java] view plain copy

/**
    * 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;
    }

 /**
  * 字符串编码转换的实现方法
  * @param str  待转换编码的字符串
  * @param oldCharset 原编码
  * @param newCharset 目标编码
  * @return
  * @throws UnsupportedEncodingException
  */
 public String changeCharset(String str, String oldCharset, String newCharset)
   throws UnsupportedEncodingException {
  if (str != null) {
   //用旧的字符编码解码字符串。解码可能会出现异常。
   byte[] bs = str.getBytes(oldCharset);
   //用新的字符编码生成字符串
   return new String(bs, newCharset);
  }
  return null;
 }