http请求参数中中文乱码问题解决办法

package cn.woogo.micp.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;

/**
* ClassName: CharacterEncodingFilter
*
* @Description: 处理请求参数乱码问题
*@author Zeus
* @date 2016-5-17
*/
public class CharacterEncodingFilter implements Filter {

   protected String encoding = null;

   protected FilterConfig filterConfig = null;

   protected boolean ignore = true;

    @Override
   public void destroy() {
       this.encoding = null;
       this.filterConfig = null;
    }

    @Override
   public void doFilter(ServletRequest request, ServletResponse response,
            FilterChain chain)throws IOException, ServletException {
       if (ignore || (request.getCharacterEncoding() == null)) {
            String encoding= selectEncoding(request);
           if (encoding != null)
                request.setCharacterEncoding(encoding);
        }
        chain.doFilter(request, response);
    }

    @Override
   public void init(FilterConfig filterConfig) throws ServletException {
       this.filterConfig = filterConfig;
       // 获取初始化参数
        this.encoding = filterConfig.getInitParameter("encoding");
        String value= filterConfig.getInitParameter("ignore");
       if (value == null) {
           this.ignore = true;
        }else if (value.equalsIgnoreCase("true")) {
           this.ignore = true;
        }else if (value.equalsIgnoreCase("yes")) {
           this.ignore = true;
        }else
            this.ignore = false;

    }

   protected String selectEncoding(ServletRequest request) {
       return (this.encoding);
    }
}