第九讲：9.1 spring使用JdbcDaoSupport

1,复制sping403，改名为spring403-02，StudentDaoImpl 添加继承JdbcDaoSupport,删除JdbcTemplate成员变量及set方法。
package com.cruise.dao.impl;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.List;

import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowCallbackHandler;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

import com.cruise.dao.StudentDao;
import com.cruise.model.Student;

public class StudentDaoImpl extends JdbcDaoSupport implements StudentDao{
    
    @Override
    public int addStudent(Student student) {
       String sql ="insert into t_student values(null,?,?)";
       Object[] params = new Object[]{student.getName(),student.getAge()};
       int i = this.getJdbcTemplate().update(sql,params);
       return i;
    }

    @Override
    public int updateStudent(Student student) {
       String sql ="update t_student set name=? ,age=? where id=?";
       Object[] params = new Object[]{student.getName(),student.getAge(),student.getId()};
       int i = this.getJdbcTemplate().update(sql,params);
       return i;
    }

    @Override
    public int deleteStudent(Integer id) {
       String sql ="delete from  t_student where id=?";
       Object[] params = new Object[]{id};
       int i = this.getJdbcTemplate().update(sql,params);
       return i;
    }

    @Override
    public List<Student> findStudents() {
       String sql ="select * from t_student";
       final ArrayList<Student> studentList = new ArrayList<Student>();
       this.getJdbcTemplate().query(sql, new RowCallbackHandler() {
           
           @Override
           public void processRow(ResultSet rs) throws SQLException {
              Student student = new Student();
              student.setId(rs.getInt("id"));
              student.setName(rs.getString("name"));
              student.setAge(rs.getInt("age"));
              studentList.add(student);
           }
       });
       return studentList;
    }
}
2.在beans.xml中，删除JdbcTemplate的bean，修改studentDao1定义的bean。
<?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:aop="http://www.springframework.org/schema/aop"
    xmlns:context="http://www.springframework.org/schema/context"
    xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd
        http://www.springframework.org/schema/context    
        http://www.springframework.org/schema/context/spring-context.xsd">

<context:property-placeholder location="jdbc.properties"/>

<bean id="dataSource1" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
        <property name="driverClassName" value="${jdbc.driverClassName}"/>
        <property name="url" value="${jdbc.url}"/>
        <property name="username" value="${jdbc.username}"/>
        <property name="password" value="${jdbc.password}"/>
</bean>


<bean id="studentDao1" class="com.cruise.dao.impl.StudentDaoImpl">
    <property name="dataSource" ref="dataSource1"></property>
</bean>

<bean id="studentService" class="com.cruise.service.impl.StudentServiceImpl">
    <property name="studentDao" ref="studentDao1"></property>
</bean>
</beans>
3，测试-运行
package com.cruise.test;

import org.springframework.context.support.ClassPathXmlApplicationContext;

import com.cruise.model.Student;
import com.cruise.service.StudentService;

public class T {
    
    public static void main(String[] args) {
       ClassPathXmlApplicationContext CPXAC=newClassPathXmlApplicationContext("beans.xml");
       StudentService  studentService = (StudentService) CPXAC.getBean("studentService");
              int i = studentService.addStudent(new Student("王黄",21));
             if (i==1) {
           System.out.println("添加成功！");
       }
    }
}