字符转码过滤器

CharacterEncodingFilter.java

 

package org.com.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;

 

public class CharacterEncodingFilter implements Filter {

 

    private String characterEncoding = null;

    private boolean enabled;

 

    @Override

    public void destroy() {

       // TODO Auto-generated method stub

       characterEncoding = null;

    }

 

    @Override

    public void doFilter(ServletRequest request, ServletResponse response,

           FilterChain chain) throws IOException, ServletException {

       // TODO Auto-generated method stub

       if (enabled || characterEncoding != null) {

           request.setCharacterEncoding(characterEncoding);

           response.setCharacterEncoding(characterEncoding);

       }

       chain.doFilter(request, response);

    }

 

    @Override

    public void init(FilterConfig config) throws ServletException {

       // TODO Auto-generated method stub

       characterEncoding = config.getInitParameter("characterEncoding");

       enabled = "true".equalsIgnoreCase(config.getInitParameter("enabled").trim());

    }

 

}

 

web.xml

<!-- 字符转码过滤器 -->

    <filter>

       <filter-name>CharacterEncodingFilter</filter-name>

       <filter-class>

           org.com.util.CharacterEncodingFilter

       </filter-class>

       <init-param>

           <param-name>characterEncoding</param-name>

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

       </init-param>

       <init-param>

           <param-name>enabled</param-name>

           <param-value>true</param-value>

       </init-param>

    </filter>

    <filter-mapping>

       <filter-name>CharacterEncodingFilter</filter-name>

       <url-pattern>/*</url-pattern>

    </filter-mapping>