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JSP page coding

2022-04-23 08:25:00 【beinlife】

/**
law ：
feasible ：utf-8 code --->gbk decode -->gbk code -->utf decode
feasible ：utf-8 code --->iso8859-1 decode -->iso8859-1 code -->utf decode
feasible ：gbk code --->iso8859-1 decode -->iso8859-1 code -->gbk decode

stay JSP When the page gets the value of the form, there will be garbled code , There are two solutions ：
One is to call getParameter Passed before request.setCharacterEncoding Set character encoding ,
The other is called new String(str.getBytes("iso8859-1"), "UTF-8") Decoding after encoding
*/
String s = " Hello ";  
// code ----------------------------------------
byte[] utf = s.getBytes("utf-8");  
byte[] gbk = s.getBytes("gbk");  

System.out.println("---------------------");
System.out.println("gbk Code utf Decode and encode ：" + new String((new String(gbk, "utf-8").getBytes("utf-8")),"gbk")); 
System.out.println("gbk Code iso8859-1 Decode and encode ：" + new String((new String(gbk, "iso8859-1").getBytes("iso8859-1")),"gbk")); 
System.out.println("utf Code gbk Decode and encode ：" + new String((new String(utf ,"gbk").getBytes("gbk")),"utf-8")); 
System.out.println("utf Code iso8859-1 Decode and encode ：" + new String((new String(utf, "iso8859-1").getBytes("iso8859-1")),"utf-8")); 

System.out.println("---------------------");
System.out.println("iso8859-1 code utf decode ：" + new String(s.getBytes("iso8859-1"),"utf-8"));

System.out.println("iso8859-1 code gbk decode ：" + new String(s.getBytes("iso8859-1"),"gbk"));


Output results ：

---------------------
gbk Code utf Decode and encode ： Roller weight copy roller �
gbk Code iso8859-1 Decode and encode ： Hello
utf Code gbk Decode and encode ： Hello
utf Code iso8859-1 Decode and encode ： Hello
---------------------
iso8859-1 code utf decode ：??
iso8859-1 code gbk decode ：??

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https://yzsam.com/2022/04/202204230734169115.html

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