Custom mybatis mapper for 2 columns

Question

I have a requirement where in I will be getting back data from 2 columns like day and month but I want to convert it in to a Date object nd set it into my bean class.

Is this possible without adding the property to the java class?

I tried checking for custom result handler but the examples were not clear enough.Are there hooks to run some kind of custom handler before returning back from the select method?

Answer 1

What you are talking about in MyBatis terms is called a Result Map Which is used to map fields withing a type to columns withing a database table.

It can be set up in two ways. XML Config :

<resultMap id = "result" type = "Date">
   <result property = "month" column = "monthcolumn"/>
   <result property = "day" column = "daycolumn"/>
   <result property = "year" column = "yearcolumn"/>
</resultMap>

<select id = "getDate" resultMap = "result">
   SELECT * FROM yourtable.dates
</select>

Or if you are using Java Annotations:

@Select("SELECT * FROM yourtable.dates")
@Results(value = {
@Result(property = "day", column = "daycolumn"),
@Result(property = "month", column = "monthcolumn"),
@Result(property = "year", column = "yearcolumn")})     
public Date getDate();