setencodefilter.java

本程序是作者用JBuilder 开发的一个娱乐系统模块.

package com.singnet.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;

public class SetEncodeFilter implements Filter {

    protected FilterConfig filterConfig = null;

    protected String defaultEncoding = null;

    /**//* (non-Javadoc)
     * @see javax.servlet.Filter#init(javax.servlet.FilterConfig)
     */
    public void init(FilterConfig arg0) throws ServletException {
        // TODO Auto-generated method stub
        this.filterConfig = arg0;
        this.defaultEncoding = filterConfig.getInitParameter("defaultencoding");
    }

    /**//* (non-Javadoc)
     * @see javax.servlet.Filter#doFilter(javax.servlet.ServletRequest, javax.servlet.ServletResponse, javax.servlet.FilterChain)
     */
    public void doFilter(
        ServletRequest request,
        ServletResponse response,
        FilterChain chain)
        throws IOException, ServletException {
        // TODO Auto-generated method stub
        request.setCharacterEncoding(selectEncoding(request));
        chain.doFilter(request, response);
    }


    public void destroy() {

        this.defaultEncoding = null;
        this.filterConfig = null;
    }


    protected String selectEncoding(ServletRequest request) {

        return this.defaultEncoding;
    }

}