01_3_查詢指定id的單個對象
阿新 • • 發佈：2018-03-27
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01_3_查詢指定id的單個對象
1. 映射文件配置如下信息
<select id="selectStudentById" resultClass="Student" parameterClass="int">
select sid, name, major, birth, score from student where sid=#sid#
</select>
2. 實現類方法實現
public Student queryStudentById(int id) {
Student student = null;
try {
student = (Student) sqlMapClient
} catch (SQLException e) {
e.printStackTrace();
}
return student;
}
3. 測試及其結果
public static void main(String[] args) {
IStudentDAO dao = new IStudentDAOImpl();
/* for(Student student : dao.queryAllStudent()) {
System.out.println(student);
}
*/
System.out.println(dao.queryStudentById(1));
}
[sid:1, name:李明, major:語文, birth:Tue Mar 27 00:00:00 CST 2018, score:100.0]
01_3_查詢指定id的單個對象