EncodingFilter

最新推荐文章于 2017-07-21 10:12:36 发布

达摩院扫地僧

最新推荐文章于 2017-07-21 10:12:36 发布

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分类专栏： struts 文章标签： filter struts encoding string class null

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本文介绍了一种解决Struts2框架中中文乱码问题的方法。通过在web.xml中配置CharacterEncodingFilter过滤器，并设置字符编码为GBK，可以确保请求和响应的正确编码，从而避免乱码问题。

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针对struts2中的乱码问题，使用filter过滤器来处理中文问题，记录如下：

web.xml配置

<filter>
    <filter-name>FilterCondition</filter-name>
    <filter-class>
     com.fct.util.CharacterEncodingFilter
    </filter-class>
    <init-param>
      <param-name>Encoding</param-name>
      <param-value>gbk</param-value>
    </init-param>
</filter>
<filter-mapping>
    <filter-name>FilterCondition</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping>

Filter类

package com.fct.util;

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.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

public class CharacterEncodingFilter implements Filter {

private String config;

   public void destroy() {
     this.config = null;
   }

   /**
     * name="FilterCondition" <br>
     * init-param name="config" value="gbk"<br>
     * mapping url-pattern="/*"<br>
     */
   public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
     HttpServletRequest req;
     req = (HttpServletRequest) request;

HttpServletResponse res;
res = (HttpServletResponse) response;

     req.setCharacterEncoding(config);
     res.setCharacterEncoding(config);
     chain.doFilter(req, res);

}

   /**
     * 获得web.xml中初始化的参数
     */
   public void init(FilterConfig config) throws ServletException {
     this.config = config.getInitParameter("Encoding");
   }

}