ibatIS中的isNotNull、isEqual、isEmpty

isNull判断property字段是否是null，用isEmpty更方便，包含了null和空字符串

例子一：
isEqual相当于equals，数字用得多些，一般都是判断状态值
<isEqual property="state" compareValue="0">
< /isEqual>
或
<isEqual property="state" compareProperty="nextState">
< /isEqual>

例子一：

传入的map或者类的属性name等于"1"吗，是就附加and和vvvv = '哈哈'
<isEqual property="name" compareValue="1" prepend="and">
vvvv = '哈哈'
< /isEqual>

传入的map或者类的属性name是null吗，是就附加and和vvvv = null
< isNull property="name" prepend="and">
vvvv = null
< /isNull>

我的应用：

###说明

1.         功能描述

用户可自行设置部分非重要弹出公告的设置。

2.         功能需求

1)         允许用户自行屏蔽“返销公告”，“银行存款通知”，“在线存款通知”三种类型公告。

2)         可在以上三种公告弹出页面上使用复选框设置不再通知此类公告。

3.         界面需求

1)         弹出公告页：

在“返销公告”（ 25 ），“银行存款通知”（ 63 ）及“在线存款通知”（ ）三种类型公告页面上增加复选框“不再弹出此类公告”。

2)         公告提示设置：

可直接对以上三种公告进行屏蔽设置（开启 10| 关闭11）。

4.         业务流程

5.         逻辑需求

用户存储屏蔽状态存储于 t_bussiness_set 中的“返销公告屏蔽”（ sale_back ），“银行存款通知”（ remittance_bank ），“在线存款通知”（ remittance_online ）字段。

6.         性能需求

7.         相关模块

8.         数据库相关表

1)         T_bussiness_set                                  商户设置表

2)         T_notice                                                 公告表

1.sqlMap

<select id="querySingleModelByOut"  parameterClass="com.hanpeng.base.phone.model.TBussinessNotice" 
	resultClass="com.hanpeng.base.phone.model.TBussinessNotice">
	select * from (select row_.*, rownum rownum_ from (
		SELECT
			i.NOTICE_NUM  as noticeNum ,			
			i.BUSSINESS_ID  as bussinessId ,			
			i.STATE  as state ,			
			i.READ_DATE  as readDate ,
			n.NOTICE_TITLE as noticeTitle ,			
			n.NOTICE_INFO as noticeInfo ,			
			n.CREATE_DATE as createDate ,			
			n.EMPLOYEE_ID as employeeId ,			
			n.NOTICE_TYPE as noticeType ,			
			n.NOTICE_SHOW_TYPE as noticeShowType ,			
			n.FINISH_DATE as finishDate ,			
			n.PUBLISH_DATE as publishDate 
		FROM  T_BUSSINESS_NOTICE i left join T_NOTICE n on n.NOTICE_NUM = i.NOTICE_NUM 
		WHERE
		n.PUBLISH_DATE &lt;= sysdate AND n.FINISH_DATE &gt;= sysdate
		<isNotEmpty prepend=" AND " property="bussinessId"> 
			i.BUSSINESS_ID = #bussinessId# </isNotEmpty>
		<isNotEmpty prepend=" AND " property="state"> 
			i.STATE = #state# </isNotEmpty>
		<isNotEmpty prepend=" AND " property="noticeShowType"> 
			n.NOTICE_SHOW_TYPE = #noticeShowType# </isNotEmpty>
		<isEqual property="saleBack" compareValue="10" prepend=" AND ">
			n.NOTICE_TYPE!='25'</isEqual>
		<isEqual property="remittanceBank" compareValue="10" prepend=" AND ">
			n.NOTICE_TYPE!='63'</isEqual>
		<isEqual property="remittanceOnline" compareValue="10" prepend=" AND ">
			n.NOTICE_TYPE!=''</isEqual>
   	)row_ where rownum &lt;=1 ) where rownum_&gt;=0
</select>

 2.Action

/**
 * 查询公告弹出
 * @return
 * @author wwy
 * @date 2011-10-13 下午13:35:11
 */
public void queryByOut(){
	try {
		PrintWriter out = this.getResponse().getWriter();
		
		if(getUserId() != null){
			bussinessNotice = noticeService.selectSingleModelByOut("26",getUserId());	
			if(bussinessNotice==null){
				out.print("");
			}
			else{
				out.print("{\"noticeNum\":\""+bussinessNotice.getNoticeNum()+"\"}");
			}
		}else{
			out.print("");
		}
	} catch (Exception e) {
		log.error("弹出式公告查询失败" + e.fillInStackTrace());
	}
}

 3.serviceImpl

public TBussinessNotice selectSingleModelByOut(String state,
		String bussinessId) {
	TBussinessNotice tbn = new TBussinessNotice();
	tbn.setBussinessId(bussinessId);
	tbn.setState("17");
	tbn.setNoticeShowType(state);
	
	TBussinessSet bussinessSet = BussinessSetService.queryById(bussinessId);//设置状态，sqlMap根据状态isEqual判断
	tbn.setSaleBack(bussinessSet.getSaleBack());
	tbn.setRemittanceBank(bussinessSet.getRemittanceBank());
	tbn.setRemittanceOnline(bussinessSet.getRemittanceOnline());
	
	return bussinessNoticeDao.selectSingleModelByOut(tbn);
}

4.frameTop.jsp

<script type="text/javascript">
	//弹出公告查询
	var autoNotice = setInterval(getNotice,1000*60); 
	function getNotice(){
		clearInterval(autoNotice);
		$.ajax({
			type:'post',	
			url:'Notice_queryByOut',
			dataType:'json',
			success:function(data){
				if(data!=null){
					$.hpDialog.open('Notice_detailByNotice?initLoadMethod=c&id='+data.noticeNum);
				}else{
					autoNotice = setInterval(getNotice,1000*60);
				}
		 	}
		});
	}
	function noticeCallback(){
		getNotice(); 
	}
</script>

 5.noticeDetail.jsp

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<title>公告明细</title>
<meta http-equiv="X-UA-Compatible" content="IE=7" />
<%@ include file="/cssBasePage.jsp"%>
<script type="text/javascript" src="<%=path %>/jsp/phone/interaction/notice/noticeDetail.js"></script>
</head>

<body>
<form id="form1">
<div class="jf_tanchu">
	<div class="jf_tanchutit">${ bussinessNotice.noticeTitle}</div>
	<div class="jf_tanchubox">
		<div class="jf_tanchubox_right">
		公告类型：<v:dcolor code="${ bussinessNotice.noticeType}"/>&nbsp;&nbsp;&nbsp;&nbsp;
		发布时间：<fmt:formatDate value="${ bussinessNotice.createDate}" pattern="yyyy-MM-dd"/>
		</div>
		${bussinessNotice.noticeInfo}
	</div>
</div>
<s:if test="bussinessNotice.noticeType=='25'||bussinessNotice.noticeType=='63'||bussinessNotice.noticeType==''">
<div>
	<input type="hidden" name="noticeType" value="${bussinessNotice.noticeType}"/>
	<input type="checkbox" id="isSelect" name="isSelect" value="${bussinessNotice.noticeType}" οnclick="javascript:noTips();"/>
	<label for="isSelect">不再通知此类公告</label>
</div>
</s:if>
</form>
<div class="jf_tanchubot">
	<s:if test="initLoadMethod == \"c\" ">
		<hp:HpButton TJsClick="var win = $.dialog.open.origin;win.noticeCallback();$.dialog.close();" TValue="confirmed" id=""></hp:HpButton>
	</s:if>
	<s:else>
		<hp:HpButton TJsClick="$.dialog.close();" TValue="close" id=""></hp:HpButton>
	</s:else>
</div>
</body>
</html>

 6.noticeDetail.js

function noTips(){
	var formParam = $("#form1").serialize();
	$.ajax({
		type:'post',	
		url:'Notice_noTipsNotice',
		data:formParam,
		cache:false,
		dataType:'json',
		success:function(data){
	 	}
	});
}