在使用jsp的时候，总会遇到中文乱码问题，几天不会的Filter 解决中文乱码的问题，今天解决了。。。也不知到什么缘由，之前的400,错误消失啦，赶忙记录下。。。html

1.index.jspjava

Insert title here

用Filter解决中文乱码问题

---

姓名:

2.接下来则是，对于提交的到display的表单，添加servlet，新建cn.edu.hpu.servlet包，在包下建立DispalyServlet的Servletweb

DispalyServlet.java

app

package cn.edu.hpu.servlet;

import java.io.IOException;

import javax.servlet.ServletException;

import javax.servlet.annotation.WebServlet;

import javax.servlet.http.HttpServlet;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

/**

* Servlet implementation class DispalyServlet

*/

@WebServlet("/display")//注意这里的url

public class DispalyServlet extends HttpServlet {

private static final long serialVersionUID = 1L;

/**

* @see HttpServlet#HttpServlet()

*/

public DispalyServlet() {

super();

// TODO Auto-generated constructor stub

}

/**

* @see HttpServlet#doPost(HttpServletRequest request, HttpServletResponse response)

*/

protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {

// TODO Auto-generated method stub

System.out.println("Message from display servlet.");

response.setCharacterEncoding("utf8");

request.getRequestDispatcher("/display.jsp").forward(request, response);

}

}3.接收页面 display.jsp

pageEncoding="UTF-8"%>

Insert title here

您输入的姓名是:

4.这里是最重要的，添加过滤Filter

package cn.hpu.edu.filter;

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.annotation.WebFilter;

/**

* Servlet Filter implementation class FilterServlet

*/

@WebFilter("/*")

public class FilterServlet implements Filter {

private FilterConfig config = null;

/**

* Default constructor.

*/

public FilterServlet() {

// TODO Auto-generated constructor stub

}

/**

* @see Filter#destroy()

*/

public void destroy() {

// TODO Auto-generated method stub

}

/**

* @see Filter#doFilter(ServletRequest, ServletResponse, FilterChain)

*/

public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {

// TODO Auto-generated method stub

// place your code here

// pass the request along the filter chain

System.out.println("Message from before encoding filter.");

String encoding = config.getInitParameter("encoding");

request.setCharacterEncoding(encoding);

response.setCharacterEncoding(encoding);

chain.doFilter(request, response);

System.out.println("Message after before encoding filter.");

}

/**

* @see Filter#init(FilterConfig)

*/

public void init(FilterConfig config) throws ServletException {

// TODO Auto-generated method stub

this.config = config;

}

}同时要在web.xml中配置Filter的初始化内容

endodingFilter

cn.hpu.edu.filter.FilterServlet

encoding

UTF-8

endodingFilter

/*

到这里，咱们就实现了用Filter解决中文乱码问题