characterencodingfilter.java

本系统有十分强大的功能

/*******************************************************************************
 * ***** BEGIN LICENSE BLOCK Version: MPL 1.1
 * 
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with the
 * License. You may obtain a copy of the License at http://www.mozilla.org/MPL/
 * 
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for
 * the specific language governing rights and limitations under the License.
 * 
 * The Original Code is the OpenCustomer CRM.
 * 
 * The Initial Developer of the Original Code is Thomas Bader (Bader & Jene
 * Software-Ingenieurb黵o). Portions created by the Initial Developer are
 * Copyright (C) 2005 the Initial Developer. All Rights Reserved.
 * 
 * Contributor(s): Thomas Bader <[e-mail]>
 * 
 * ***** END LICENSE BLOCK *****
 */

package org.opencustomer.framework.webapp.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 org.apache.log4j.Logger;

public final class CharacterEncodingFilter implements Filter
{
    private final static Logger log = Logger.getLogger(CharacterEncodingFilter.class);

    private String encoding = "UTF-8";

    public void init(FilterConfig filterConfig) throws ServletException {
        if (filterConfig.getInitParameter("encoding") != null && filterConfig.getInitParameter("encoding").length() > 0)
            this.encoding = filterConfig.getInitParameter("encoding");

        if (log.isDebugEnabled())
            log.debug("use '" + encoding + "' for request/response encoding");
    }

    /**
     * Take this filter out of service.
     */
    public void destroy() {
        this.encoding = null;
    }
    
    public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException {
        if (log.isDebugEnabled())
            log.debug("client encoding: request=" + request.getCharacterEncoding() + "/response=" + response.getCharacterEncoding());

        request.setCharacterEncoding(encoding);
        response.setCharacterEncoding(encoding);

        chain.doFilter(request, response);
    }
}