Java post request garbled solution

In Java WEB projects, Chinese garbled characters are a frequently encountered and very troublesome problem. The link where garbled characters are most likely to occur is the process of the browser sending a request to the server. The following introduces the solution to this problem, I hope it will help everyone. The following transcoding is based on UTF-8. If it is other encoding formats, you can modify it yourself.

1. Response garbled code

(1) Set the server-side encoding: response.setCharacterEncoding("UTF-8");

This setting is above Be sure to precede the response.getWriter() method;

(2) Notify the browser of the data format sent: response.setContentType("text/html;charset=UTF-8");

(3) The browser uses UTF-8 for decoding.

2. Request garbled code

1. Submit in Post mode, the parameters exist in the request body, you only need to set this:

request.setCharacterEncoding("UTF-8");

2. Submit by Get method, the parameters will be spliced ​​after the URI address, and the server will decode according to iso8859-1 by default. There are two solutions:

(1). Modify the reception in the program Request encoding (this method requires transcoding for every request, not recommended)

String str = request.getParameter("s");
str = new String(str.getBytes("iso8859-1"),"UTF-8")

(2) Find the server.xml file in the Tomcat installation folder, search for the 52114130f673a0a75cb6ea1d5ccf6b73 tag and modify it (This method works once and for all)

<Connector URIEncoding="UTF-8" 
        port="8080"   maxHttpHeaderSize="8192"
        maxThreads="150" minSpareThreads="25" maxSpareThreads="75"
        connectionTimeout="20000" disableUploadTimeout="true" />

Just add URIEncoding="UTF-8" to this tag and then restart tomcat.

For more java knowledge, please pay attention to java basic tutorial.

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