How to write two parasmeters in Spring MyBatis Mapper? - spring

Question

I'm currently implements Comments on comments.
When a member views a given post, they should be able to see comments on comments and comments.
To satisfy the above conditions, you need the index value of the post and the index value of the comment. That is, two parameter values ​​are required.
So I wrote the following logic.
boardDaoMapper.xml
<select id="selectCommentOfComment" parameterType="java.util.HashMap" resultType="java.util.HashMap">
select * from board_comment_of_comment where board_idx = #{board_idx} and board_comm_idx = #{board_comm_idx}
</select>
And the BoardDao code:
public List<HashMap<String, Object>> selectCommentOfComment(int board_idx, int board_comm_idx);
And the BoardService:
#Override
public List<HashMap<String, Object>> getBoardCommentOfComment(int board_idx, int board_comm_idx)
{
System.out.println("ServieImple getBoardCommentOfComment Function Call >> " + board_idx + " / " + board_comm_idx);
List<HashMap<String, Object>> c_of_c_list = boardDao.selectCommentOfComment(board_idx, board_comm_idx);
return c_of_c_list;
}
And BoardController code:
#RequestMapping("viewPage.do")
public String viewPage(HttpSession session,HttpServletRequest request, HttpServletResponse response,Model model,
#RequestParam(value="board_idx", defaultValue="1") int board_idx) throws IOException,IllegalStateException
{
checkLogin(request, response, session);
// 해당 게시물에 대한 댓글들의 idx값 조회 (board_comm_idx)
List<HashMap<String, Object>> commentList= bService.getBoardForComment(boardData.getBoard_idx());
System.out.println("Board_idx Value was : " + board_idx);
// 해당 게시물에 대한 댓글들의 개수만큼 for문을 돌고..
for(int i = 0; i < commentList.size(); i++)
{
// board_comm_idx 값을 변수에 저장
int board_comm_idx= (Integer) commentList.get(i).get("board_comm_idx");
List<HashMap<String, Object>> getCommentOfComentList =
bService.getBoardCommentOfComment(board_idx, board_comm_idx);
System.out.println("GetCommentOfCommentList : " + getCommentOfComentList);
model.addAttribute("cocList", getCommentOfComentList);
}
return "viewPage";
}
Values ​​are good for two parameters.(at BoardService) Like that..
ServieImple getBoardCommentOfComment Function Call >> 2 / 3
However, this does not perform well and causes an error.
org.apache.ibatis.binding.BindingException: Parameter 'board_idx' not found. Available parameters are [0, 1, param1, param2]
at org.apache.ibatis.binding.MapperMethod$ParamMap.get(MapperMethod.java:165)
at org.apache.ibatis.reflection.wrapper.MapWrapper.get(MapWrapper.java:44)
at org.apache.ibatis.reflection.MetaObject.getValue(MetaObject.java:116)
at org.apache.ibatis.executor.BaseExecutor.createCacheKey(BaseExecutor.java:186)
at org.apache.ibatis.executor.CachingExecutor.createCacheKey(CachingExecutor.java:129)
at org.apache.ibatis.executor.CachingExecutor.query(CachingExecutor.java:76)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:108)
at org.apache.ibatis.session.defaults.DefaultSqlSession.selectList(DefaultSqlSession.java:102)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.mybatis.spring.SqlSessionTemplate$SqlSessionInterceptor.invoke(SqlSessionTemplate.java:358)
at com.sun.proxy.$Proxy11.selectList(Unknown Source)
at org.mybatis.spring.SqlSessionTemplate.selectList(SqlSessionTemplate.java:198)
at org.apache.ibatis.binding.MapperMethod.executeForMany(MapperMethod.java:119)
at org.apache.ibatis.binding.MapperMethod.execute(MapperMethod.java:63)
at org.apache.ibatis.binding.MapperProxy.invoke(MapperProxy.java:52)
at com.sun.proxy.$Proxy13.selectCommentOfComment(Unknown Source)
at service.BoardServiceImple.getBoardCommentOfComment(BoardServiceImple.java:367)
at controller.BoardController.viewPage(BoardController.java:175)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at org.springframework.web.bind.annotation.support.HandlerMethodInvoker.invokeHandlerMethod(HandlerMethodInvoker.java:180)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.invokeHandlerMethod(AnnotationMethodHandlerAdapter.java:440)
at org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter.handle(AnnotationMethodHandlerAdapter.java:428)
at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:963)
at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:897)
at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:970)
at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:861)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:635)
at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:846)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:742)
I think Mapper has a problem.
Why is this happening and how should I fix it?
Your comments are valuable. Please tell me your opinion.

Answer 1

The problem with the current approach
You currently your mapping set up in a way that doesn't accept your parameters into the DAO layer parameterType="java.util.HashMap"
This being the case, iBatis is expecting a HashMap to be passed.
There are multiple ways that you can go about fixing your code.
1.) Using Named Parameters (Depending on your version) > 3
public List<HashMap<String, Object>> selectCommentOfComment(#Param("board_idx") int board_idx, #Param("board_comm_idx") int board_comm_idx);
And remove the parameter type from your mapping xml.
2.) Pass in the expected object
You can fix your DAO method signature to reflect your mapping. And make the corresponding changes in the service.
DAO:
public List<HashMap<String, Object>> selectCommentOfComment(HashMap<String, Object> parameter);
SERVICE:
public List<HashMap<String, Object>> getBoardCommentOfComment(int board_idx, int board_comm_idx)
{
HashMap<String, Object> parameters = new HashMap<String, Object>();
parameters.put("board_idx", board_idx);
parameters.put("board_comm_idx", board_comm_idx");
List<HashMap<String, Object>> c_of_c_list = boardDao.selectCommentOfComment(board_idx, board_comm_idx);
return c_of_c_list;
}
You can draw additional inspiration from their documentation.
http://www.mybatis.org/mybatis-3/sqlmap-xml.html