String class coding and decoding problem in

String(byte[] bytes,String charsetName):通过指定的字符集解码字节数组
byte[] getByte(String charasetName):使用指定的字符集合吧字符串编码为字节数组

Code: to see to understand becomes not read

String-->byte[]

Decoding: can not read into the can understand

byte[]-->String

String s="你好";
		
		//编码
		//String-->byte[]:
		byte[] bt=s.getBytes();//默认是GBK编码，[-60, -29, -70, -61]
		//byte[] bt=s.getBytes("UTF-8");//[-28, -67, -96, -27, -91, -67]
		//System.out.println(Arrays.toString(bt));
		
		//解码（和编码的格式一定要一样，不然会出错）
		//byte[]--->String
		String ss=new String(bt);
		System.out.println(ss);