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。

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<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）：

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@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！

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<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。

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@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

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<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。