java utf-8_java如何把string转为utf-8

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java不同编码之间进行转换，都需要使用unicode作为中转。

String str = "任意字符串";

str = new String(str.getBytes("gbk"),"utf-8");

备注说明：62616964757a686964616fe58685e5aeb931333366303731

str.getBytes("UTF-8"); 意思是以UTF-8的编码取得字节

new String(XXX,"UTF-8"); 意思是以UTF-8的编码生成字符串

举例：

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