编码与解码那些事

package com.et.io.convert;

import java.io.UnsupportedEncodingException;

public class ConvertDemo01 {
public static void main(String[] args) throws UnsupportedEncodingException {
String str ="中国";
byte[] data =str.getBytes();
//字节数不完整
System.out.println(new String(data,0,3));
}

public static void test1() throws UnsupportedEncodingException {
//解码byte-->char
String str="中国";    //gbk
//编码char --> byte
byte[] data =str.getBytes();
//编码与解码字符集统一
System.out.println(new String(data));
//不统一字符集出现乱码
data=str.getBytes("UTF-8");//设定编码字符集
System.out.println(new String(data));
//编码
byte[] data2 = "中国".getBytes("UTF-8");
//解码
str=new String(data2,"UTF-8");
System.out.println(new String(str));
}
}