关于字符编码过滤器的问题

package com.csdn.tool;

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 java.io.IOException;



public class CharacterEncodingFilter implements Filter {

	private FilterConfig config;

	private String encoding = "UTF-8";



	public void destroy() {

		config = null;

	}

	@Override

	public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException, ServletException {

		request.setCharacterEncoding(encoding);

		chain.doFilter(request, response);

	}



	public void init(FilterConfig config) throws ServletException {

		this.config = config;

		String s = config.getInitParameter("encoding");

		if (s != null) {

			encoding = s;

		}

	}

}

这段代码仅提示

@Override

	public void doFilter(ServletRequest request,ServletResponse response,FilterChain chain) throws IOException, ServletException {

		request.setCharacterEncoding(encoding);

		chain.doFilter(request, response);

	}

这个方法没能正确重载Filter的方法doFilter() 去掉@Override符号就好了  但是我查看了Servlet API文档

Filter接口确实有这个方法 求大牛给出解决办法

------解决方案--------------------
继承了人家的接口却不实现？
没看懂你意思
转码：

public void doFilter(ServletRequest arg0, ServletResponse arg1, 

FilterChain arg2) throws IOException, ServletException { 

//参数转换，因为我们已经它肯定是Http协议的请求。 

HttpServletRequest request = (HttpServletRequest)arg0; 

HttpServletResponse response = (HttpServletResponse)arg1; 

//设置request和response使用的编码均为UTF-8。 

request.setCharacterEncoding("UTF-8"); 

response.setCharacterEncoding("UTF-8"); 

response.setContentType("text/html;charset=UTF-8");