编码与解码

/*
编码：字符串转换成字节
解码：字节变字符串
String---->byte[]  str.getBytes();
byte[]--->String;  new String(byte[],charsetname);
编一次解一次
*/
import java.util.*;
import java.lang.Exception;
class CodeDemo
{
	public static void main(String[] args) throws Exception
	{
		String s = "你好";
		byte[] b1 = s.getBytes();
		System.out.println(Arrays.toString(b1));

		String s1 = new String(b1,"ISO8859-1");			//CodeDemo.java:23: 错误: 未报告的异常错误UnsupportedEncodingException; 必须对其进行捕获或声明以便抛出
		System.out.println("s1=" + s1);					//加密

		//对s1进行ISO8859-1编码
		byte[] b2 = s1.getBytes("iso8859-1");
		System.out.println(Arrays.toString(b2));

		String s2 = new String(b2,"gbk");
		System.out.println("s2="+ s2);

	}
}