servletencodefilter.java

java相关的j2me,j2se的一些相关资料

package cn.sh.web;

import javax.servlet.*;
import java.io.IOException;
import javax.swing.JOptionPane;

public class ServletEncodeFilter implements Filter {
    private FilterConfig _filterConfig = null;
    private String encoding;
    
    public void init(FilterConfig filterConfig) throws ServletException { //服务器启动时会调用此方法
        _filterConfig = filterConfig;
        encoding=_filterConfig.getInitParameter("encoding");
        System.out.println("服务器启动!编码为"+encoding);
    }
    
    public void destroy() { //服务器关闭时会调用此方法
        _filterConfig = null; //服务器关闭时将FilterConfig的对象置为null
        System.out.println("服务器关闭!编码为"+encoding);
    }
    
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        request.setCharacterEncoding(encoding);   //设置字符编码
        response.setContentType("text/html;charset="+encoding);
        chain.doFilter(request, response);  //////必须使用此,才能传递控制到下一个过滤器
    }
}