jahiapageformtag.java

java 写的一个新闻发布系统

package org.jahia.taglibs.form;

import org.jahia.data.*;
import org.jahia.params.ParamBean;
import org.jahia.exceptions.JahiaException;
import org.jahia.utils.JahiaConsole;
import org.jahia.services.pages.*;

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

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


/**
 * Generate an html form which name is "jahiaform" and action is the current page request with cache off
 *
 * @author Khue Nguyen <a href="mailto:[e-mail]">[e-mail]</a>
 */
public class JahiaPageFormTag extends TagSupport {

    private static final String CLASS_NAME = JahiaPageFormTag.class.getName();
	public static final String FORM_NAME = "jahiapageform";
	private String name = FORM_NAME;
	private String method = "POST";
		
	public void setName(String name)
	{
		if ( name != null && !name.trim().equals("") )
		{
			this.name = name;
		}
	}

	public String getName()
	{
		return this.name;
	}

	public void setMethod(String method)
	{
		if ( method != null && method.equalsIgnoreCase("get") )
		{
			this.method = method;
		}
	}

	public String getMethod()
	{
		return this.method;
	}
	
    public int doStartTag() {
        ServletRequest request = 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");
        }
        if ( jData == null )
            return EVAL_BODY_INCLUDE;
		
		JahiaPage page = jData.params().getPage();

        try {
            String pageUrl = page.getUrl();
            if ( pageUrl != null && pageUrl.indexOf("/cache/off") == -1 )
            {
				int pos = pageUrl.indexOf("?");
				if ( pos == -1 )
				{
					pageUrl += "/cache/offonce";            
				} else {
					pageUrl = pageUrl.substring(0,pos-1) + "/cache/offonce" + pageUrl.substring(pos);
				}
			}

            JspWriter out = pageContext.getOut();
            StringBuffer buff = new StringBuffer("<form name=\"");
            buff.append(this.name);
            buff.append("\"" );
            buff.append(" action=\"");
            buff.append(pageUrl);
			buff.append("\" method=\"");
			buff.append(this.method);
			buff.append("\">");
            out.print(buff.toString());
        } catch (IOException ioe) {
            JahiaConsole.println(CLASS_NAME+"doStartTag", ioe.toString());
        } catch (JahiaException je) {
            JahiaConsole.println(CLASS_NAME+"doStartTag", je.toString());
        }

        return EVAL_BODY_INCLUDE;
    }

	public int doAfterBody(){
		try {
			JspWriter out = pageContext.getOut();
         	out.print("</form>");
         	return EVAL_PAGE;
        } catch (IOException ioe) {
            JahiaConsole.println(CLASS_NAME+"doStartTag", ioe.toString());
		}
       	return EVAL_PAGE;
	}

}