Mybatis error : The error occurred while setting parameters - mybatis

Question

org.apache.ibatis.exceptions.PersistenceException:
### Error querying database. Cause: java.lang.UnsupportedOperationException
### The error may exist in kr/co/techinmotion/mybatis/mappers/dataOutputMapper.xml
### The error may involve kr.co.techinmotion.mybatis.mappers.dataOutputMapper.selectData1-Inline
### The error occurred while setting parameters
### SQL: select * from tbl_id, tbl_feed where tbl_id.id = tbl_feed.upid and tbl_id.token = ?
### Cause: java.lang.UnsupportedOperationException
at org.apache.ibatis.exceptions.ExceptionFactory.wrapException(ExceptionFactory.java:23)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:107)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:98)
at kr.co.techinmotion.daoImpl.DataDaoImplMybatis.selectData1(DataDaoImplMybatis.java:47)
I don't know why this error occurred.
This is my sql in mapper.
<select id="selectData1" parameterType="string" resultType="list">
select * from tbl_id, tbl_feed
where tbl_id.id = tbl_feed.upid
and tbl_id.token = #{token}
</select>
and.. this is DAO.
public class DataDaoImplMybatis implements IdataDao {
private DataDaoImplMybatis(){}
private static DataDaoImplMybatis dao;
public static DataDaoImplMybatis getInstance(){
if(dao == null){
dao = new DataDaoImplMybatis();
}
return dao;
}
SqlSessionFactory sessionFactory = SqlMapSessionFactory.getSqlSessionFactory();
#Override
public List<DataResult1> selectData1(String token){
SqlSession session = sessionFactory.openSession();
List<DataResult1> list = session.selectList("kr.co.techinmotion.mybatis.mappers.dataOutputMapper.selectData1", token);
session.close();
return list;
}
}
please help me.. T_T

Answer 1

The "MyBatis-3-User-Guide" says:
resultType: The fully qualified class name or alias for the expected type that will be returned from this statement. Note that in the case of collections, this should be the type that the collection contains, not the type of the collection itself. Use resultType OR resultMap, not both.

Answer 2

In my case was that added 'useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true' in jdbc.url, that solved my issue:)
jdbc.url=jdbc:mysql://127.0.0.1:3306/xxx?useUnicode=true&characterEncoding=utf8&autoReconnect=true&allowMultiQueries=true

Answer 3

The resultType SHOULD NOT be list, the below shows the revised type, but you have to make sure the select statement can map to DataResult1 accordingly
<select id="selectData1" parameterType="string" resultType="DataResult1">
select * from tbl_id, tbl_feed
where tbl_id.id = tbl_feed.upid
and tbl_id.token = #{token}
</select>
alternatively, you may try this:
<select id="selectData1" parameterType="string" resultType="map">
select * from tbl_id, tbl_feed
where tbl_id.id = tbl_feed.upid
and tbl_id.token = #{token}
</select>
and the changes to the java source code
List<Map<String,Object> list = session.selectList("kr.co.techinmotion.mybatis.mappers.dataOutputMapper.selectData1", token);

Answer 4

1 floor is right, but I want to say resultType = "" respect a row in your database but not all, perhaps you may select count(user_id) from user, now your resultType = 'long', if you select more than two results, you may use resultType = 'map' or yourself map, resultType = 'yourselfMap'

Answer 5

You have to declare the "jdbcType=VARCHAR" or "jdbcType=NUMERIC" of the variable depending upon the type of variable passed in order to pass the null value. Try using this:
<select id="selectData1" parameterType="string" resultType="map">
select * from tbl_id, tbl_feed
where tbl_id.id = tbl_feed.upid
and tbl_id.token = #{token,jdbcType=VARCHAR}
</select>