ibatis传入数组或List类型参数小结

小结一下ibatis框架下，传入参数为数组类型或者是List类型的sql写法。标签里面都不需要表名  

    1.传入字符串数组，不需要标明parameterClasss，数组和List类型对象一样都可以用<iterate>标签进行遍历。

 

<select id="selectOrgIdByNameStr" resultClass="Integer">
        SELECT id
        FROM org
        WHERE name IN
        <iterate close=")" open="("  conjunction=",">
            <![CDATA[
                 #[]#
            ]]>
       </iterate>
    </select>

    java调用代码（注意空指针问题）：

 

@Override
    public List<Integer> selectOrgIdByNameStr(String[] orgArchArr) {
         return baseDao.queryForList("org.selectOrgIdByNameStr", orgArchArr, Integer.class);
    }

    2.传入List<Integer>，这个时候parameterClass传的是List接口的类路径，而不是List的泛型参数的类路径！

 

<select id="searchWaiters" parameterClass="java.util.List" resultClass="com.chat.domain.zone.WaiterCgExt">
        SELECT w.id, pin as userName, org_id as orgId, w.name, erp, job_no as jobNo, level, max_csu, gid,cg.name chatGroupName, r.yn groupYn, cg.yn chatGroupYn
        FROM waiter w left join waiter_relation r on  w.id = r.wid LEFT JOIN chat_group cg on r.gid = cg.id, org o
        WHERE o.id = w.org_id
            AND w.yn = 1
            AND o.yn = 1
            AND w.id IN <iterate open="(" close=")" conjunction=",">
                #wid[]#
            </iterate>
    </select>

    java调用代码如下，注意空指针问题。

@Override
    public List<WaiterCgExt> searchWaiters(ModAccManVo vo) {
        List<Integer> widList = baseDao.queryForList("zone.waiter.searchWaitersId", vo, Integer.class);
        if(CollectionUtils.isEmpty(widList)) {
            return new ArrayList<WaiterCgExt>();
        }
        return baseDao.queryForList("zone.waiter.searchWaiters", widList, WaiterCgExt.class);
    }

    3.传入的List的元素是复杂的对象类型，类型类型里面包含id属性。同样，parameterClass传入的是List接口的类路径，而不是List的泛型参数的类路径。遍历的时候，用#list[].id#就行了，“.”后面跟上要枚举的属性名称

<select id="selectWaitersByOrgList" resultClass="com.chat.domain.zone.Waiter" parameterClass="java.util.List">
        SELECT id, pin as userName
        FROM waiter
        WHERE org_id IN
            <iterate open="(" close=")" conjunction=",">
                #list[].id#
            </iterate>
            AND yn = 1
    </select>

   

    以上代码在本机都正常运行。