JSP page value transfer garbled code filtering method

In this paper, an example is given to describe the filtering method of JSP page value garbled code. Share it for your reference, as follows:

1. Filter class:

package com.token.t1;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
public class CharacterEncodingFilter implements Filter {
  public void destroy() {
  }
  public void doFilter(ServletRequest request, ServletResponse response,
      FilterChain chain) throws IOException, ServletException {
 　　　　  request.setCharacterEncoding("gbk");
    chain.doFilter(request, response);
  }
  public void init(FilterConfig arg0) throws ServletException {
  }
}

2. xml file configuration:

<?xml version="1.0" encoding="UTF-8"?>
<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
  http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">
<!-- Filter configuration -->
 　　 <filter>
    <filter-name>CharacterEncodingFilter</filter-name>   <!-- This name is the same as <filter-mapping> Under <filter-name> Just be the same  -->
    <filter-class>com.token.t1.CharacterEncodingFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>CharacterEncodingFilter</filter-name>
    <url-pattern> /* </url-pattern>
  </filter-mapping>
  <display-name></display-name>
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

When I use < form > This method cannot be filtered when submitting by default. You need to set method= "post" to filter

I hope this article is helpful to everyone's JSP programming.