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Java

SetCharacterEncodingFilter.java：源码内容

							/*
 * Created on 2005-6-17
 * Made In GamVan 
 * 
 */
package com.gamvan.filters;
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;
//import javax.servlet.UnavailableException;
public class SetCharacterEncodingFilter implements Filter {
    protected String encoding = null;
    protected FilterConfig filterConfig = null;
    protected boolean ignore = true;
  
    public void init(FilterConfig filterConfig) throws ServletException {
        this.filterConfig = filterConfig;
        this.encoding = filterConfig.getInitParameter("encoding");
        String value = filterConfig.getInitParameter("ignoer");
        if(value==null)
            this.ignore=true;
        else if(value.equalsIgnoreCase("true"))
            this.ignore=true;
        else if(value.equalsIgnoreCase("yes"))
            this.ignore=true;
        else
            this.ignore = false;
       
    }
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) 
    					throws IOException, ServletException {
        if(this.ignore||(request.getCharacterEncoding()==null)){
            String encoding = selectEncoding(request);
            if(encoding!=null)
                request.setCharacterEncoding(encoding);
        }
        chain.doFilter(request,response);
    }
    public void destroy() {
        this.encoding = null;
        this.filterConfig = null;
 
    }
    protected String selectEncoding(ServletRequest request) {
        return this.encoding;
    }
}

						