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. 1.         功能描述

用户可自行设置部分非重要弹出公告的设置。

1. 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。

1. 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”（ 64 ）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）。

1. 4.         业务流程

 

1. 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。

1. 6.         性能需求

1. 7.         相关模块

1. 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!='64'</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>
        ${bussinessNotice.noticeInfo}
    </div>
</div>
<s:if test="bussinessNotice.noticeType=='25'||bussinessNotice.noticeType=='63'||bussinessNotice.noticeType=='64'">
<div>
    <input type="hidden" name="noticeType" value="${bussinessNotice.noticeType}"/>
    <input type="checkbox" id="isSelect" name="isSelect" value="${bussinessNotice.noticeType}" onclick="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){
        }
    });
}