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！！！