Interface StudentDAO
package com.example;
import java.util.List;
import javax.sql.DataSource;
public interface StudentDAO {
/**
* This is to be used to initialize
* databaseconnection.
*/
public void setDataSource(DataSource ds);
/**
* This is to be used to create
* a record in Student table.
*/
public void create(String name, Integer age);
/**
* This is to be used to list down
* a record from the Student table corresponding
* to a passed student id.
public Student getStudent(Integer id);
/**
* This is to be used to list down
* all the records from the Student table.
*/
public List<Student> listStudents();
/**
* This is to be used to delete
* a record from the Student table corresponding
* to a passed student id.
*/
public void delete(Integer id);
/**
* This is to be used to update
* a record into the Student table.
*/
public void update(Integer id, Integer age);
}
Student.java
package com.example;
public class Student {
}
StudentMapper.java
import java.sql.ResultSet;
import java.sql.SQLException;
import org.springframework.jdbc.core.RowMapper;
public class StudentMapper implements RowMapper<Student> {
}
package com.example;
import java.util.List;
import javax.sql.DataSource;
import org.springframework.jdbc.core.JdbcTemplate;
public class StudentJDBCTemplate implements StudentDAO {
private DataSource dataSource;
private JdbcTemplate jdbcTemplateObject;
public void setDataSource(DataSource dataSource) {
this.dataSource = dataSource;
this.jdbcTemplateObject = new JdbcTemplate(dataSource);
}
public void create(String name, Integer age) {
String SQL = “insert into Student (name, age) values (?, ?)”;
jdbcTemplateObject.update(SQL, name, age);
System.out.println(“Created Record Name = “ + name + “ Age = “ + age);
return;
}
public Student getStudent(Integer id) {
String SQL = “select * from Student where id = ?”;
Student student = jdbcTemplateObject.queryForObject(SQL,
new Object[]{id}, new StudentMapper());
return student;
}
public List<Student> listStudents() {
String SQL = “select * from Student”;
List <Student> students = jdbcTemplateObject.query(SQL, new StudentMapper());
return students;
}
public void delete(Integer id) {
String SQL = “delete from Student where id = ?”;
jdbcTemplateObject.update(SQL, id);
System.out.println(“Deleted Record with ID = “ + id);
return;
}
public void update(Integer id, Integer age){
String SQL = “update Student set age = ? where id = ?”;
jdbcTemplateObject.update(SQL, age, id);
System.out.println(“Updated Record with ID = “ + id);
return;
}
}
<?xml version=“1.0” encoding=“UTF-8”?>
<beans xmlns=“http://www.springframework.org/schema/beans”
xmlns:xsi=“http://www.w3.org/2001/XMLSchema-instance”
xmlns:context=“http://www.springframework.org/schema/context”
xmlns:jdbc=“http://www.springframework.org/schema/jdbc”
xmlns:lang=“http://www.springframework.org/schema/lang”
xsi:schemaLocation=“http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.3.xsd
http://www.springframework.org/schema/jdbc
http://www.springframework.org/schema/jdbc/spring-jdbc-4.3.xsd
http://www.springframework.org/schema/lang
http://www.springframework.org/schema/lang/spring-lang-4.3.xsd”>
<bean id=“dataSource” class=“org.springframework.jdbc.datasource.DriverManagerDataSource”>
<property name=“driverClassName” value=“com.mysql.jdbc.Driver”/>
<property name=“url” value=“jdbc:mysql://localhost:3306/Test”/>
<property name=“username” value=“root”/>
<property name=“password” value=““/>
</bean>
<bean id=“studentJDBCTemplate” class=“com.example.StudentJDBCTemplate”>
<property name=“dataSource” ref=“dataSource”/>
</bean>
</beans>
package com.example;
import java.util.List;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.example.StudentJDBCTemplate;
public class MainApp {
public static void main(String[] args) {
ApplicationContext context = new ClassPathXmlApplicationContext(“Beans.xml”);
StudentJDBCTemplate studentJDBCTemplate =
(StudentJDBCTemplate)context.getBean(“studentJDBCTemplate”);
System.out.println(“------Records Creation--------”);
studentJDBCTemplate.create(“Hari”, 11);
studentJDBCTemplate.create(“Nuha”, 2);
studentJDBCTemplate.create(“Ayan”, 15);
System.out.println(“------Listing Multiple Records--------”);
List<Student> students = studentJDBCTemplate.listStudents();
for (Student record: students) {
System.out.print(“ID : “ + record.getId());
System.out.print(“, Name : “ + record.getName());
System.out.println(“, Age : “ + record.getAge());
}
System.out.println(“----Updating Record with ID = 2 -----”);
studentJDBCTemplate.update(2, 20);
System.out.println(“----Listing Record with ID = 2 -----”);
Student student = studentJDBCTemplate.getStudent(2);
System.out.print(“ID : “ + student.getId());
System.out.print(“, Name : “ + student.getName());
System.out.println(“, Age : “ + student.getAge());
}
}