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Result Mapping to HashMap
The following example shows using a result map.
It provides a way of mapping resultant columns with java hash map.
01 | <?xml version="1.0" encoding="UTF-8"?> |
02 | <!DOCTYPE sqlMap PUBLIC "-//ibatis.apache.org//DTD SQL Map 2.0//EN" |
05 | <sqlMap namespace="Student"> |
07 | <resultMap id="studentRM" class="java.util.HashMap"> |
08 | <result property="studentId" columnIndex="1" /> |
09 | <result property="fullName" columnIndex="2" /> |
12 | <select id="getAllAsMap" resultMap="studentRM"> |
13 | select STUDENT_ID, (FIRST_NAME || ' ' || LAST_NAME) from STUDENT |
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package com.bethecoder.tutorials.ibatis.tests.basic;
import java.io.IOException;
import java.io.Reader;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import com.ibatis.common.resources.Resources;
import com.ibatis.sqlmap.client.SqlMapClient;
import com.ibatis.sqlmap.client.SqlMapClientBuilder;
public class MapResults {
/**
* @param args
* @throws IOException
* @throws SQLException
*/
public static void main(String[] args) throws IOException, SQLException {
Reader reader = Resources.getResourceAsReader("SqlMapConfig.xml");
SqlMapClient sqlMapClent = SqlMapClientBuilder.buildSqlMapClient(reader);
List<Map> studs = (List<Map>) sqlMapClent.queryForList("Student.getAllAsMap");
for (Map stud : studs) {
System.out.println(stud);
}
}
}
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It gives the following output,
{studentId=1, fullName=Jim Attic}
{studentId=2, fullName=Raj Kumar}
{studentId=3, fullName=Ram Prasad}
{studentId=4, fullName=Arjun Mishra}
{studentId=5, fullName=Vishal Pratap}
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