最近使用Springmvc，GET传输参数的时候，经常出错误，下面介绍添加一个Filter的方法，可以解决这个问题。既支持POST方式也支持GET方式。

首先写一个Filter

package com.qunar.filter;

import java.io.IOException;

import java.io.UnsupportedEncodingException;

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.HttpServletRequest;

import javax.servlet.http.HttpServletRequestWrapper;

import javax.servlet.http.HttpServletResponse;

public class CharacterEncodingFilter implements Filter {

    private String encode = "UTF-8";// 默认UTF-8编码

    public void init(FilterConfig filterConfig) throws ServletException {

        String encoding = filterConfig.getInitParameter("encode");

        if (encoding != null) {

            encode = encoding;

        }

    }

    public void doFilter(ServletRequest req, ServletResponse resp,

            FilterChain chain) throws IOException, ServletException {

        HttpServletRequest request = (HttpServletRequest) req;

        HttpServletResponse response = (HttpServletResponse) resp;

        // 设置request编码

        request.setCharacterEncoding(encode);

        // 设置相应信息

        response.setContentType("text/html;charset=" + encode);

        response.setCharacterEncoding(encode);

        chain.doFilter(new CharacterEncodingRequest(request), response);

    }

    public void destroy() {

    }

}

/**

 * 对Get方式传递的请求参数进行编码

 */

class CharacterEncodingRequest extends HttpServletRequestWrapper {

    private HttpServletRequest request = null;

    public CharacterEncodingRequest(HttpServletRequest request) {

        super(request);

        this.request = request;

    }

    /**

     * 对参数重新编码

     */

    @Override

    public String getParameter(String name) {

        String value = super.getParameter(name);

         if(value == null)

               return null;

         String method = request.getMethod();

        if ("get".equalsIgnoreCase(method)) {

            try {

                value = new String(value.getBytes("ISO8859-1"), request.getCharacterEncoding());

            } catch (UnsupportedEncodingException e) {

                e.printStackTrace();

            }

        }

        return value;

    }

}

然后在xml里面添加这个filter

<filter>

      <filter-name>characterEncodingFilter</filter-name>

      <filter-class>com.qunar.filter.CharacterEncodingFilter</filter-class>

      <init-param>

          <param-name>encode</param-name>

          <param-value>UTF-8</param-value>

      </init-param>

  </filter>

  <filter-mapping>

      <filter-name>characterEncodingFilter</filter-name>

      <url-pattern>/*</url-pattern>

  </filter-mapping>

当然有一些人为了单纯解决GET的编码问题，修改整个站点的编码，直接修改Connector也可以。

<Connector connectionTimeout="" port="" protocol="HTTP/1.1" redirectPort="" URIEncoding="UTF-8"/>

巴特西

JAVA WEB 解决编码问题的filter

首先写一个Filter

然后在xml里面添加这个filter

最新文章

热门文章