setcharacterencodingfilter.java

电信的网厅的整站代码

package com.doone.fj1w.fjmgr;

/**
 * Created by IntelliJ IDEA.
 * User: lizhx
 * Date: 2005-7-22
 * Time: 10:50:02
 * Email:[e-mail]
 */
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 destroy() {
        this.encoding = null;
        this.filterConfig = null;
    }
    public void doFilter(ServletRequest request, ServletResponse response,
                          FilterChain chain)
         throws IOException, ServletException {
        if (ignore || (request.getCharacterEncoding() == null)) {
             String encoding = selectEncoding(request);
             if (encoding != null)
                 request.setCharacterEncoding(encoding);
         }

        chain.doFilter(request, response);

     }
    public void init(FilterConfig filterConfig) throws ServletException {

         this.filterConfig = filterConfig;
         this.encoding = filterConfig.getInitParameter("encoding");
         String value = filterConfig.getInitParameter("ignore");
         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;

     }
    protected String selectEncoding(ServletRequest request) {
        return (this.encoding);
    }
}