Go语言视频零基础入门到精通

inweqp2

1. 首先在你的工程中创建Servlet，package为xiaogu ,name为EncodingFilter,然后把下边代码粘贴过去。

package xiaogu;

import java.io.IOException;
import java.io.PrintWriter;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.util.*;

public class EncodingFilter extends HttpServlet implements Filter {
private FilterConfig filterConfig;
private String trargetEncoding=null;
public void init(FilterConfig filterConfig)throws ServletException{
   this.filterConfig=filterConfig;
   this.trargetEncoding=this.filterConfig.getInitParameter("encoding");
  
}
public void doFilter(ServletRequest request, ServletResponse response,
    FilterChain filterChain) {
   // TODO Auto-generated method stub
   try{
    //在控制台输出目标编码
    System.out.println("trargetEncoding:"+trargetEncoding+"\n");
    //执行编码，实际的处理内容
    request.setCharacterEncoding(trargetEncoding);
    filterChain.doFilter(request,response);
   }
   catch (ServletException sx)
   {
    filterConfig.getServletContext().log(sx.getMessage());
   
   }
   catch (IOException iox){
    filterConfig.getServletContext().log(iox.getMessage());
   }

}
public void destroy() {
   //清空资源
   this.filterConfig=null;
   this.trargetEncoding=null;
  
}
}

2.在web.xml中把下面的代码插到</servlet>与<servlet-mapping>中间，

<filter>
<filter-name>encodingfilter</filter-name>
<filter-class>xiaogu.EncodingFilter</filter-class>//xiaogu为你的Java程序的包名，EncodingFilter是你的java的类名。
<init-param>
<description>encode to UTF-8</description>//UTF-8表示中文编码
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingfilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

nywe21

谢谢楼主总结啊。