مثال ResultSetExtractor|الحصول على السجلات من خلال Spring JdbcTemplate

public T query(String sql,ResultSetExtractor<T> rse)

public T extractData(ResultSet rs)throws SQLException,DataAccessException

create table employee(
id number(10),
name varchar2(100),
salary number(10)
);

مكتبة com.w3codebox;
public class Employee {
private int id;
private String name;
private float salary;
//no-arg and parameterized constructors
//getters and setters
public String toString(){
    return id+" "+name+" "+salary;
}
}

مكتبة com.w3codebox;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
إدراج java.util.List;
import org.springframework.dao.DataAccessException;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.ResultSetExtractor;
public class EmployeeDao {
private JdbcTemplate template;
public void setTemplate(JdbcTemplate template) {
    this.template = template;
}
public List<Employee> getAllEmployees(){
 return template.query("select * from employee",new ResultSetExtractor<List<Employee>>(){
    @Override
     public List<Employee> extractData(ResultSet rs) throws SQLException,
            DataAccessException {
        List<Employee> list=new ArrayList<Employee>();
        while(rs.next()){
        Employee e=new Employee();
        e.setId(rs.getInt(1));
        e.setName(rs.getString(2));
        e.setSalary(rs.getInt(3));
        list.add(e);
        }
        return list;
        }
    });
  }
}

<?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:p="http://www.springframework.org/schema/p"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
 http://www.springframework.org/schema/beans/spring-beans-3.0.xsd">
<bean id="ds" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="oracle.jdbc.driver.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:@localhost:1521:xe" />
<property name="username" value="system" />
<property name="password" value="oracle" />
</bean>
<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
<property name="dataSource" ref="ds"></property>
</bean>
<bean id="edao" class="com.w3codebox.EmployeeDao">
<property name="jdbcTemplate" ref="jdbcTemplate"></property>
</bean>
</beans>

مكتبة com.w3codebox;
إدراج java.util.List;
إدراج org.springframework.context.ApplicationContext;
إدراج org.springframework.context.support.ClassPathXmlApplicationContext;
public class Test {
public static void main(String[] args) {
    ApplicationContext ctx=new ClassPathXmlApplicationContext("applicationContext.xml");
    EmployeeDao dao=(EmployeeDao)ctx.getBean("edao");
    List<Employee> list=dao.getAllEmployees();
    لـ for(Employee e:list)
        System.out.println(e);
    }
}