i18ntag.java

java 写的一个新闻发布系统

package org.jahia.taglibs.util;

import org.jahia.data.JahiaData;
import org.jahia.exceptions.JahiaException;
import org.jahia.utils.JahiaConsole;

import java.io.*;
import java.util.*;

import javax.servlet.http.*;
import javax.servlet.jsp.*;
import javax.servlet.jsp.tagext.*;


/**
 * Class I18nTag : support for I18n within Jahia
 * Do not use this tag in the same time with the JSP directive :
 * <%@ page contentType= "text/html; charset = ... %>
 *
 * The charset attribute is only used when
 * JData.params().settings().getCharSet().equals("") is true
 *
 * @author Khue Nguyen
 */
public class I18nTag extends TagSupport {

    private static final String CLASS_NAME = I18nTag.class.getName();

    protected String contentType = "text/html"; // default value
    protected String charSet	 = "ISO-8859-1";

    public void setContentType(String contentType) {
        this.contentType = contentType;
    }

    public void setCharSet(String charSet) {
        this.charSet = charSet;
    }

    public int doStartTag() {

        HttpServletRequest request = (HttpServletRequest)pageContext.getRequest();
		JahiaData jData = (JahiaData) request.getAttribute("org.jahia.data.JahiaData");
		if (jData == null) {
            HashMap tempEngineMap = (HashMap) request.getAttribute("org.jahia.engines.EngineHashMap");
            jData                 = (JahiaData) tempEngineMap.get("jData");
		}

        // Caution : UTF-8 is not realy a charset !!
		String jahiaCharSet = "";
        if (jData.params().settings().isUtf8Encoding()) {
            jahiaCharSet = "UTF-8";
        }
		//System.out.println(CLASS_NAME+".doStartTag: Jahia Char Set is " + jahiaCharSet);

		StringBuffer buff = new StringBuffer(contentType);
		buff.append(";");
		if (!jahiaCharSet.equals("")) {
            buff.append("charset=");
	    	buff.append(jahiaCharSet);
		} else if (!charSet.equals("")) {
	    	buff.append("charset=");
	    	buff.append(charSet);
		}

		pageContext.getResponse().setContentType(buff.toString());
        JahiaConsole.println(CLASS_NAME + ".doStartTag", "Content type : " + buff.toString());
        
		Locale locale = jData.params().getLocale();
		if ( locale != null ){
	    	((HttpServletResponse)pageContext.getResponse()).setHeader("Content-Language",locale.getLanguage());
	    	((HttpServletResponse)pageContext.getResponse()).setHeader("Vary","Accept-Language");
		}
		return SKIP_BODY;
    }
}