charactorencodingfilter.java

动态网站管理发布系统

package com.ntsky.filter;

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.http.HttpServletRequest;

/**
 *  <p>
 *
 *  Title: </p> CharactorEncodingFilter<p>
 *
 *  Description: </p> CharactorEncodingFilter <p>
 *
 *  Copyright: Copyright (c) 2005</p> <p>
 *
 *  Company: </p>
 *
 *@author     not attributable
 *@version    1.0
 */

public class CharactorEncodingFilter implements Filter {
	private FilterConfig filterConfig;
	/**
	 *  Description of the Method
	 *
	 *@param  filterConfig          Description of Parameter
	 *@exception  ServletException  Description of Exception
	 *@since                        empty
	 */
	public void init(FilterConfig filterConfig) throws ServletException {
		this.filterConfig = filterConfig;
	}

	/**
	 *  Description of the Method
	 *
	 *@param  request               Description of Parameter
	 *@param  response              Description of Parameter
	 *@param  chain                 Description of Parameter
	 *@exception  IOException       Description of Exception
	 *@exception  ServletException  Description of Exception
	 *@since                        empty
	 */
	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
		HttpServletRequest req = (HttpServletRequest)request;
		String convert = GenericUtil.trim(filterConfig.getInitParameter("NEED_CONVERT"));
		String encoding = GenericUtil.trim(filterConfig.getInitParameter("ENCODING"));

		if(Boolean.valueOf(convert).booleanValue() && !GenericUtil.isNullOrBlank(encoding)) {
			if(!GenericUtil.trim(req.getCharacterEncoding()).equalsIgnoreCase(encoding)) {
				req.setCharacterEncoding(encoding);
			}
		}
		try {
			chain.doFilter(request, response);
		}
		catch(Exception ex) {
			ex.printStackTrace();
		}
	}
	/**
	 *  Description of the Method
	 *
	 *@since    empty
	 */
	public void destroy() {
		this.filterConfig = null;
	}
}