基于tomcat8 编写字符编码Filter过滤器无效问题的解决方法

<span style="font-size:12px;">package com.chaoxing.newspaper.web.filter;import java.io.IOException;import java.lang.reflect.InvocationHandler;import java.lang.reflect.Method;import java.lang.reflect.Proxy;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 {	public void doFilter(ServletRequest req, ServletResponse res, FilterChain chain) throws IOException, ServletException {		System.out.println("过滤器执行");		 final HttpServletRequest request = (HttpServletRequest) req; 	    HttpServletResponse response = (HttpServletResponse) res; 	     	    //解决post请求的中文乱码 	    request.setCharacterEncoding("UTF-8"); 	    response.setCharacterEncoding("UTF-8"); 	    response.setContentType("text/html;charset=UTF-8");				chain.doFilter((ServletRequest) Proxy.newProxyInstance(this.getClass().getClassLoader(), request.getClass().getInterfaces(), new InvocationHandler(){			@Override			public Object invoke(Object proxy, Method method, Object[] args)					throws Throwable {				String methodname = method.getName(); //拿到当前的方法 	      if(methodname.equals("getParameter")){ 	        //执行request.getparameter获取结果 	        String value = (String) method.invoke(request, args); 	        if(value==null){ 	          return null; 	        } 	        if(!request.getMethod().equalsIgnoreCase("get")){ //判断是为get请求 	          return value; 	        } 	        System.out.println(value+"|||||");	        //转换编码返回 	        value = new String(value.getBytes("UTF-8"),"UTF-8"); 	        System.out.println(value+"=======");	        return value; 	      } 	      //交给request执行请求 	      return method.invoke(request, args); 	      } 					} ), res);	}	public void init(FilterConfig fConfig) throws ServletException {		System.out.println("过滤器初始化");	}	@Override	public void destroy() {		System.out.println("过滤器完成");	}}</span>

<span style="font-size:12px;"> <!--解决全站乱码的filter  -->  <filter>   <filter-name>CharacterEncoding</filter-name>   <filter-class>com.XXX.web.filter.CharacterEncodingFilter</filter-class>  </filter>  <filter-mapping>   <filter-name>CharacterEncoding</filter-name>   <url-pattern>/*</url-pattern>  </filter-mapping></span>