Spring（七）--Spring JDBC

Spring JDBC

1.需要的实体类和数据库

2.需要的dao层

package com.xdf.dao;

import com.xdf.bean.Student;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

import java.io.Serializable;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;

/**
 * dao的实现类
 * 书写sql
 * JdbcDaoSupport====>BaseDao
 * JdbcDaoSupport有两个重要的属性
 * 01.jdbcTemplate    模版
 * 02.需要 dataSource  ===>数据源
 *
 * JdbcDaoSupport  所有的增删改 都是update
 *                            查询是query
 *
 */
public class StudentDaoImpl extends JdbcDaoSupport implements StudentDao {

       public int add(Student student) {
        String sql="insert into student values(?,?)";
        return getJdbcTemplate().update(sql,student.getsId(),student.getsName());
      }

    public int del(Serializable id) {
           String sql="delete from student where sid=?";
        return getJdbcTemplate().update(sql,id);
    }

    public int update(Student student) {
           String sql="update student set sname=?  where sid=?";
        return getJdbcTemplate().update(sql,student.getsName(),student.getsId());
    }

    public List<Student> getAll() {
           String sql="select * from student";
           //使用匿名内部类
        return getJdbcTemplate().query(sql,new RowMapper<Student>(){
                /**
                 * 这里的ResultSet是返回一个对象！
                 * 我们之前使用的是 一个结果集！
                 */
                public Student mapRow(ResultSet rs, int rowNum) throws SQLException {
                    //创建student对象  依次返回
                    Student student=new Student();
                    student.setsId(rs.getInt("sid"));
                    student.setsName(rs.getString("sname"));
                    return student;
                }
        });
    }
}

3.需要的service层

package com.xdf.service;

import com.xdf.bean.Student;
import com.xdf.dao.StudentDao;

import java.io.Serializable;
import java.util.List;

public class StudentServiceImpl implements   StudentService {

    //交给spring容器实例化dao层对象
    private StudentDao dao;

    public StudentDao getDao() {
        return dao;
    }

    public void setDao(StudentDao dao) {
        this.dao = dao;
    }

    public int add(Student student) {
        return dao.add(student);
    }

    public int del(Serializable id) {
        return dao.del(id);
    }

    public int update(Student student) {
        return dao.update(student);
    }

    public List<Student> getAll() {
        return dao.getAll();
    }
}

4.需要的jdbc.properties

5.需要的核心配置文件

<?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:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:c="http://www.springframework.org/schema/c"
       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.xsd
        http://www.springframework.org/schema/tx
        http://www.springframework.org/schema/tx/spring-tx.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--引入需要的jdbc.properties文件-->
    <context:property-placeholder location="classpath:jdbc.properties"/>

    <!--01.使用spring自带的数据源
    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
         <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>-->

    <!--02.使用c3p0自带的数据源
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
         <property name="driverClass" value="${jdbc.driverClassName}"/>
         <property name="jdbcUrl" value="${jdbc.url}"/>
         <property name="user" value="${jdbc.userName}"/>
         <property name="password" value="${jdbc.password}"/>
    </bean>-->


    <!--03.使用dbcp自带的数据源-->
    <bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource">
         <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>
    <!--配置dao层对象-->
    <bean  id="studentDao" class="com.xdf.dao.StudentDaoImpl">
        <property name="dataSource" ref="dataSource"/>
    </bean>

    <!-- 配置service层对象-->
     <bean  id="studentService" class="com.xdf.service.StudentServiceImpl">
         <property name="dao" ref="studentDao"/>
     </bean>
</beans>

6.测试类

　　　　未完待续！！！