filterencoding.java

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package com.accp;

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;

public class FilterEncoding extends HttpServlet implements Filter {
    private FilterConfig filterConfig;
    String coding ="";
    //Handle the passed-in FilterConfig
    public void init(FilterConfig filterConfig) throws ServletException {
        coding = filterConfig.getInitParameter("code");
        System.out.println("过滤器初始化...1");
        this.filterConfig = filterConfig;
    }

    //Process the request/response pair
    public void doFilter(ServletRequest request, ServletResponse response,
                         FilterChain filterChain) {
       try {
            //过滤中文
            request.setCharacterEncoding(coding);
            filterChain.doFilter(request, response);
        } catch (ServletException sx) {
            filterConfig.getServletContext().log(sx.getMessage());
        } catch (IOException iox) {
            filterConfig.getServletContext().log(iox.getMessage());
        }
    }

    //Clean up resources
    public void destroy() {
         System.out.println("过滤器销毁...4");
    }
}