乱码处理.txt

可以解决在jsp页面向action传值遇到的中文乱码问题。

package com.centrain.jstl;

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;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;

import java.io.*;
import java.util.*;

public class FirstFilter extends HttpServlet implements Filter{
	private FilterConfig filterConfig;
	private String coding="";

	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig=filterConfig;
		this.coding=filterConfig.getInitParameter("encoding");
	}
	
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain filterChain) throws IOException, ServletException {
		try{
			System.out.println("使用"+coding+"编码方式对请求进行编码");
			HttpServletRequest hsr=(HttpServletRequest)request;
			hsr.setCharacterEncoding(coding);
			filterChain.doFilter(request, response);
		}catch(ServletException sx){
			filterConfig.getServletContext().log(sx.getMessage());
		}catch(IOException iox){
			filterConfig.getServletContext().log(iox.getMessage());
		}
	}
	public void destroy()
	{
		this.filterConfig=null;
	}
}








~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~web  文件中的内容

	<filter>
		<filter-name>encoding</filter-name>
		<filter-class>[com.centrain.jstl.FirstFilter](工具包的路径名字)</filter-class>
		<init-param>
			<param-name>encoding</param-name>
			<param-value>gb2312</param-value>
	</init-param>	
	</filter>

	<filter-mapping>
		<filter-name>encoding</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>