java 从 IBatis 获取 Map<String,CustomData>
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Fetch Map<String,CustomData> from IBatis
提问by Echo
I am creating an ibatis quesry that its result should be :
我正在创建一个 ibatis 查询，其结果应该是：
Map<String,CustomData>
My ibatis query:
我的 ibatis 查询：
<resultMap id="dataMap" class="java.util.HashMap">
<result property="key" column="UUID"/>
<result property="value" resultMap ="customData"/>
</resultMap>
<resultMap id="customData" class="com.model.CustomData">
<result property="x" column="X_COL"/>
</resultMap>
<select id="fetchData"
resultClass="java.util.HashMap"
parameterClass="java.util.Map">
SELECT
UUID AS UUID,
(CASE
WHEN SOME_DATA IS NOT NULL THEN 'TRUE'
END) AS X_COL
FROM TABLE
</select>
CustomData is a java class:
CustomData 是一个 Java 类：
public class CustomData{
private String x;
//Getters & Setters
}
I expect to get the following on the Java:
我希望在 Java 上获得以下内容：
Map<String,CustomData>
However I get the following:
但是我得到以下信息：
Map<String,String>
Any ideas !
有任何想法吗 ！
回答by zoom
You should try to replace the resultClassattribute in your selecttag by a resultMapwith a "dataMap"value like this :
您应该尝试将标记中的resultClass属性替换select为resultMap具有如下"dataMap"值的a ：
<select id="fetchData"
resultMap="dataMap"
parameterClass="java.util.Map">
<!-- your query -->
</select>
In your case the queryForListmethod try to instanciate a java.util.HashMapinstead of this, it should use the dataMapmapping you defined above.
在您的情况下，该queryForList方法尝试实例化 ajava.util.HashMap而不是 this，它应该使用dataMap您在上面定义的映射。
