编码过滤器

1. 在web.xml 配置

 <!--编码过滤  utf-8  -->
   <filter>
       <filter-name>EncodingFilter</filter-name>
       <filter-class>com.yongjie.Zlxypt.util.FilterEncoding</filter-class>
   	   <init-param>
   	   	  <param-name>enconding</param-name>
   	   	  <param-value>UTF-8</param-value>
   	   </init-param>
   </filter>
   <filter-mapping>
       <filter-name>EncodingFilter</filter-name>
       <url-pattern>/*</url-pattern>
   </filter-mapping>

2. 过滤器代码

package com.yongjie.Zlxypt.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;
/**
 * 
* @ClassName: FilterEncoding
* @Description: TODO(编码过滤器)
* @date 2017年9月28日 下午4:13:38
*
 */
public class FilterEncoding implements Filter{
	private String enconding;

	@Override
	public void destroy() {

	}

	@Override
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
			throws IOException, ServletException {
		request.setCharacterEncoding(enconding);
		response.setCharacterEncoding(enconding);
		chain.doFilter(request, response);
	}

	@Override
	public void init(FilterConfig config) throws ServletException {
		enconding = config.getInitParameter("enconding");
	}

}