配置web编码过滤器

package com.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;

public class EncodingFilter implements Filter {

    public void destroy() {
        // TODO Auto-generated method stub 
    }

    public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding("UTF-8");
        response.setCharacterEncoding("UTF-8");
        chain.doFilter(request, response);
    }

    public void init(FilterConfig filterConfig) throws ServletException {
      
    }
}

    <filter>
        <filter-name>EncodingFilter</filter-name>
        <filter-class>com.filter.EncodingFilter</filter-class>
    </filter>

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