第九讲：9.2 NameParameterJdbcTemplate

1，复制spring403 改名 spring403-03。修改beans.xml中的中id为jdbctemplate1的bean和id为studentDao1的bean。在beans.xml中， 在NameParameterJdbcTemplate中通过构造的方法注入dataSource1
<?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="namedParameterJdbcTemplate1"class="org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate">
        <constructor-arg ref="dataSource1"></constructor-arg>
</bean>

<bean id="studentDao1" class="com.cruise.dao.impl.StudentDaoImpl">
    <property name="namedParameterJdbcTemplate" ref="namedParameterJdbcTemplate1"></property>
</bean>

<bean id="studentService" class="com.cruise.service.impl.StudentServiceImpl">
    <property name="studentDao" ref="studentDao1"></property>
</bean>

</beans>
2，修改studentDaoImpl类中的成员变量jdbcTemplate为NameParameterJdbcTemplate，重新生成set方法。修改studentDaoImpl中的逻辑代码。
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.RowCallbackHandler;
import org.springframework.jdbc.core.namedparam.MapSqlParameterSource;
import org.springframework.jdbc.core.namedparam.NamedParameterJdbcTemplate;

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

public class StudentDaoImpl implements StudentDao{
   
    private NamedParameterJdbcTemplate namedParameterJdbcTemplate;
   
    public void setNamedParameterJdbcTemplate(NamedParameterJdbcTemplate namedParameterJdbcTemplate) {
       this.namedParameterJdbcTemplate = namedParameterJdbcTemplate;
    }

    @Override
    public int addStudent(Student student) {
       String sql ="insert into t_student values(null,:name,:age)";
       MapSqlParameterSource msps= new MapSqlParameterSource();
       msps.addValue("name", student.getName());
       msps.addValue("age", student.getAge());
       return namedParameterJdbcTemplate.update(sql, msps);
    }

    @Override
    public int updateStudent(Student student) {
       String sql ="update t_student set name=:name ,age=:age where id=:id";
       MapSqlParameterSource msps= new MapSqlParameterSource();
       msps.addValue("name", student.getName());
       msps.addValue("age", student.getAge());
       msps.addValue("id", student.getId());
       return namedParameterJdbcTemplate.update(sql, msps);
    }

    @Override
    public int deleteStudent(Integer id) {
       String sql ="delete from  t_student where id=:id";
       MapSqlParameterSource msps= new MapSqlParameterSource();
       msps.addValue("id", id);
       return namedParameterJdbcTemplate.update(sql, msps);
    }

    @Override
    public List<Student> findStudents() {
       String sql ="select * from t_student";
       final ArrayList<Student> studentList = new ArrayList<Student>();
       namedParameterJdbcTemplate.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;
    }
}
3，运行-测试