Introduction to several garbled code processing methods in Java

java garbled solution:

Solution 1 (if there are many garbled parameters, it will be less efficient)

The default encoding of the browser is ISO-8859-1. The back-end Servlet receives the request parameters, decodes them according to ISO-8859-1, obtains a binary stream, and then encodes it with UTF-8.

Sample code:

// 获得请求参数
String queryString = request.getQueryString();
// 按照ISO-8859-1方式解码
byte[] bytes = queryString.getBytes("ISO-8859-1");
// 按照UTF-8编码
String param = new String(bytes,"UTF-8");

Solution 2 (This method only supports get request)

Modify the server ( tomcat) configuration: In server.xml, the default is ISO-8859-1 (not shown), we can add UTF-8

solution 3 (This method only supports post request)

Set the request parameter encoding directly in the servlet--recommended

//设置请求参数编码 
request.setCharacterEncoding("UTF-8");

If post and get appear garbled at the same time, combine method 2 and method 3. Use

to respond with garbled characters - to respond to

 // 设置MIME类型
response.setContentType("text/html");
// 设置编码
response.setCharacterEncoding("UTF-8");
//设置编码（简写）
response.setContentType("text/html;charset=utf-8");

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