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);}}