com.jdon.strutsutil.taglib.MPageTag.java Source code

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Here is the source code for com.jdon.strutsutil.taglib.MPageTag.java

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/**
 * Copyright 2003-2006 the original author or authors.
 * Licensed under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0
    
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

package com.jdon.strutsutil.taglib;

import java.io.UnsupportedEncodingException;
import java.net.URLEncoder;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;

import org.apache.commons.lang.StringUtils;
import org.apache.struts.config.ModuleConfig;
import org.apache.struts.taglib.html.LinkTag;

import cn.vetech.framework.util.VeStr;

import com.jdon.strutsutil.FormBeanUtil;
import com.jdon.strutsutil.ModelListForm;
import com.jdon.util.Debug;

/**
 * Html:link
 *
 * <p>Copyright: Jdon.com Copyright (c) 2003</p>
 * <p></p>
 * @author banq
 * @version 1.0
 */
public class MPageTag extends LinkTag {

    private final static String module = MPageTag.class.getName();

    public final static String URLNAME = "URL";
    public final static String COUNT = "COUNT";
    public final static String START = "START";
    public final static String ALLCOUNT = "ALLCOUNT";
    public final static String NEXTPAGE = "NEXTPAGE";
    public final static String DISP = "DISP";

    private String actionFormName;

    // --------------------------------------------------------- Public Methods

    /**
     * Render the beginning of the hyperlink.
     *
     * @exception JspException if a JSP exception has occurred
     */
    public int doStartTag() throws JspException {

        // Generate the URL to be encoded
        ModuleConfig config = (ModuleConfig) pageContext.getRequest()
                .getAttribute(org.apache.struts.Globals.MODULE_KEY);

        HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();
        String pageUrl = calculateURL();

        if (StringUtils.isNotBlank(pageUrl)) {
            try {
                String dh = "dh89001";
                String wh = "wh89001";
                String yh = "yh89001";
                String xg = "xg89001";
                pageUrl = VeStr.Replace(pageUrl, "=", dh);
                pageUrl = VeStr.Replace(pageUrl, "?", wh);
                pageUrl = VeStr.Replace(pageUrl, "&", yh);
                pageUrl = VeStr.Replace(pageUrl, "/", xg);

                pageUrl = URLEncoder.encode(pageUrl, "UTF-8");

                pageUrl = VeStr.Replace(pageUrl, dh, "=");
                pageUrl = VeStr.Replace(pageUrl, wh, "?");
                pageUrl = VeStr.Replace(pageUrl, yh, "&");
                pageUrl = VeStr.Replace(pageUrl, xg, "/");

            } catch (UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }

        StringBuffer url = new StringBuffer(pageUrl);
        if (pageUrl.indexOf("?") < 0)
            url.append("?");
        else
            url.append("&");

        ModelListForm form = null;
        try {
            form = (ModelListForm) FormBeanUtil.lookupActionForm((HttpServletRequest) pageContext.getRequest(),
                    actionFormName);
            if (form == null)
                throw new Exception();
        } catch (Exception e) {
            Debug.logError("[JdonFramework]not found actionFormName value: " + actionFormName, module);
            throw new JspException(" not found " + actionFormName);
        }

        int start = form.getStart();
        int allCount = form.getAllCount();
        int count = form.getCount();
        url.append("count=").append(count);

        String nextPage = "";
        if ((allCount > (start + count)))
            nextPage = NEXTPAGE;

        pageContext.setAttribute(URLNAME, url.toString());
        pageContext.setAttribute(START, Integer.toString(start));
        pageContext.setAttribute(COUNT, Integer.toString(count));
        pageContext.setAttribute(ALLCOUNT, Integer.toString(allCount));
        pageContext.setAttribute(NEXTPAGE, nextPage);

        int currentPage = 1;
        if (count > 0) {
            currentPage = (start / count) + 1;
        }

        //??
        if ((currentPage == 1) && (nextPage.length() == 0)) {
            pageContext.setAttribute(DISP, "off"); //?
        } else
            pageContext.setAttribute(DISP, "on");

        // Evaluate the body of this tag
        return (EVAL_BODY_INCLUDE);

    }

    /**
     * Render the end of the hyperlink.
     *
     * @exception JspException if a JSP exception has occurred
     */
    public int doEndTag() throws JspException {

        return (EVAL_PAGE);

    }

    /**
     * Release any acquired resources.
     */
    public void release() {

        super.release();

    }

    public String getActionFormName() {
        return actionFormName;
    }

    public void setActionFormName(String actionFormName) {
        this.actionFormName = actionFormName;
    }

}