mybasepage.java

学习tapestry的好书啊,绝对经典实用.

package com.cucu.tapestry.component;

import com.cucu.tapestry.util.PageUtil;
import org.apache.tapestry.IRequestCycle;
import org.apache.tapestry.html.BasePage;

/**
 * 在MyBasePage定义一些Page所共用的参数和方法，以便继承
 *
 * @author 绝情酷哥
 * @version $Id$
 */
public abstract class MyBasePage extends BasePage {
    /**
     * 初始化pageUtil对象 重要
     */
    private PageUtil pageUtil = new PageUtil();


    /**
     * @return 页面中要调用的pageUtil对象
     */
    public PageUtil getPageUtil() {
        return this.pageUtil;
    }

    /**
     * 分页事件
     *
     * @param cycle
     */
    public void doPageBreak(
            IRequestCycle cycle) {
        Object [] parameters = cycle.getListenerParameters();
        String action = (String) parameters[0];
        this.pageUtil = (PageUtil) parameters[1];
        if (action.equalsIgnoreCase("first")) {
            this.pageUtil.setCurrentPageNum(1);
        } else if (action.equalsIgnoreCase("last")) {
            this.pageUtil.setCurrentPageNum(pageUtil.getPageCount());
        } else if (action.equalsIgnoreCase("previous")) {
            this.pageUtil.setCurrentPageNum(
                    pageUtil.getCurrentPageNum() - 1);
        } else if (action.equalsIgnoreCase("next")) {
            this.pageUtil.setCurrentPageNum(
                    pageUtil.getCurrentPageNum() + 1);
        }
    }
}