spring03：spring整合JDBC和aop事务

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一、spring整合JDBC
1.spring提供了很多模板整合Dao技术
2.spring中提供了一个可以操作数据库的对象.对象封装了jdbc技术.
　　 JDBCTemplate => JDBC模板对象

与DBUtils中的QueryRunner非常相似.

package com.kankan.jdbctemplate;

import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.junit.Test;
import org.springframework.jdbc.core.JdbcTemplate;

import java.beans.PropertyVetoException;

/**
 * @author kankan
 * @creater 2019-04-29 8:02
 */
public class Demo {
    @Test
    public void fun() throws Exception {
        //0 准备连接池
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass("com.mysql.jdbc.Driver");
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/web09");
        dataSource.setUser("root");
        dataSource.setPassword("123");

        //1.创建JDBC模板对象
        JdbcTemplate jt = new JdbcTemplate();

        jt.setDataSource(dataSource);

        //2.书写sql，并执行
        String sql = "insert into category values('c005','看看')";

        jt.update(sql);
    }
}

3.1 导包
　　 4+2：4代表：

2代表：com.springsource.org.apache.commons.logging-1.1.1.jar、com.springsource.org.apache.log4j-1.2.15.jar（老版本要导入的，导入可以保证一定能运行）

spring-test、spring-aop、junit4类库

c3p0连接池、JDBC驱动

spring-jdbc、spring-tx事务

3.2 准备数据库（两个字段id（自增长）和name即可）

　　 3.3 书写Dao

package com.kankan.jdbctemplate;

import com.kankan.bean.User;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
//使用JDBC模板实现增删改查
public class UserDaoImpl implements UserDao{

    private JdbcTemplate jt;

    public JdbcTemplate getJt() {
        return jt;
    }

    public void setJt(JdbcTemplate jt) {
        this.jt = jt;
    }

    @Override
    public void save(User u) {
        String sql = "insert into user values(?,?)";
        jt.update(sql,u.getId(),u.getName());
    }

    @Override
    public void delete(Integer id) {
        String sql = "delete from user where id = ?";
        jt.update(sql,id);
    }

    @Override
    public void update(User u) {
        String sql = "update user set name=? where id=?";
        jt.update(sql,u.getName(),u.getId());
    }

    @Override
    public User getById(Integer id) {
        String sql = "select * from user where id=?";
        return jt.queryForObject(sql, new RowMapper<User>() {

            @Override
            public User mapRow(ResultSet resultSet, int arg1) throws SQLException{
                User u = new User();
                u.setId(resultSet.getInt("id"));
                u.setName(resultSet.getString("name"));
                return u;
            }
        },id);
    }

    @Override
    public int getTotalCount() {
        String sql = "select count(*) from user";
        Integer count = jt.queryForObject(sql,Integer.class);
        return count;
    }

    @Override
    public List<User> getAll() {
        String sql = "select * from user";
        List<User> list = jt.query(sql, new RowMapper<User>() {
            @Override
            public User mapRow(ResultSet resultSet, int i) throws SQLException {
                User u = new User();
                u.setId(resultSet.getInt("id"));
                u.setName(resultSet.getString("name"));
                return u;
            }
        });
        return list;
    }
}

3.4 spring配置
　　 依赖关系

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- 1.将连接池放入spring容器 -->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/user" ></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver" ></property>
        <property name="user" value="root" ></property>
        <property name="password" value="123" ></property>
    </bean>


    <!-- 2.将JDBCTemplate放入spring容器 -->
    <bean name="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
        <property name="dataSource" ref="dataSource"></property>
    </bean>

    <!-- 3.将UserDao放入spring容器 -->
    <bean name="userDao" class="com.kankan.jdbctemplate.UserDaoImpl" >
         <property name="jt" ref="jdbcTemplate" ></property>
        <!--<property name="dataSource" ref="dataSource" ></property>-->
    </bean>

</beans>

3.5 测试

package com.kankan.jdbctemplate;

import com.kankan.bean.User;
import com.mchange.v2.c3p0.ComboPooledDataSource;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.annotation.Resource;
import java.beans.PropertyVetoException;

/**
 * @author kankan
 * @creater 2019-04-29 8:02
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring-config.xml")
public class Demo {

    @Resource(name="userDao")
    private UserDao ud;

    /*@Test
    public void fun() throws Exception {
        //0 准备连接池
        ComboPooledDataSource dataSource = new ComboPooledDataSource();
        dataSource.setDriverClass("com.mysql.jdbc.Driver");
        dataSource.setJdbcUrl("jdbc:mysql://localhost:3306/user");
        dataSource.setUser("root");
        dataSource.setPassword("123");

        //1.创建JDBC模板对象
        JdbcTemplate jt = new JdbcTemplate();

        jt.setDataSource(dataSource);

        //2.书写sql，并执行
        String sql = "insert into user values(2,'看看')";

        jt.update(sql);
    }*/

    @Test
    public void fun1() throws Exception {
        User u = new User();
        u.setId(3);
        u.setName("tom");
        ud.save(u);
    }

    @Test
    public void fun2() throws Exception {
        User u = new User();
        u.setId(3);
        u.setName("miss");
        ud.update(u);
    }

    @Test
    public void fun3() throws Exception {
       ud.delete(3);
    }

    @Test
    public void fun4() throws Exception {
        System.out.println(ud.getById(2));
    }

    @Test
    public void fun5() throws Exception {
        System.out.println(ud.getTotalCount());
    }

    @Test
    public void fun6() throws Exception {
        System.out.println(ud.getAll());
    }
}

4.进阶内容
　　 4.1 JDBCDaoSupport

public class UserDaoImpl extends JdbcDaoSupport

package com.kankan.jdbctemplate;

import com.kankan.bean.User;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.core.RowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;

import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.List;
//使用JDBC模板实现增删改查
public class UserDaoImpl extends JdbcDaoSupport implements UserDao{

    //private JdbcTemplate jt;

    /*public JdbcTemplate getJt() {
        return super.getJdbcTemplate();
    }

    public void setJt(JdbcTemplate jt) {
        this.jt = jt;
    }*/

    @Override
    public void save(User u) {
        String sql = "insert into user values(?,?)";
        super.getJdbcTemplate().update(sql,u.getId(),u.getName());
    }

    @Override
    public void delete(Integer id) {
        String sql = "delete from user where id = ?";
        super.getJdbcTemplate().update(sql,id);
    }

    @Override
    public void update(User u) {
        String sql = "update user set name=? where id=?";
        super.getJdbcTemplate().update(sql,u.getName(),u.getId());
    }

    @Override
    public User getById(Integer id) {
        String sql = "select * from user where id=?";
        return super.getJdbcTemplate().queryForObject(sql, new RowMapper<User>() {

            @Override
            public User mapRow(ResultSet resultSet, int arg1) throws SQLException{
                User u = new User();
                u.setId(resultSet.getInt("id"));
                u.setName(resultSet.getString("name"));
                return u;
            }
        },id);
    }

    @Override
    public int getTotalCount() {
        String sql = "select count(*) from user";
        Integer count = super.getJdbcTemplate().queryForObject(sql,Integer.class);
        return count;
    }

    @Override
    public List<User> getAll() {
        String sql = "select * from user";
        List<User> list = super.getJdbcTemplate().query(sql, new RowMapper<User>() {
            @Override
            public User mapRow(ResultSet resultSet, int i) throws SQLException {
                User u = new User();
                u.setId(resultSet.getInt("id"));
                u.setName(resultSet.getString("name"));
                return u;
            }
        });
        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"
       xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd">

    <!-- 1.将连接池放入spring容器 -->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/user" ></property>
        <property name="driverClass" value="com.mysql.jdbc.Driver" ></property>
        <property name="user" value="root" ></property>
        <property name="password" value="123" ></property>
    </bean>


    <!-- 2.将JDBCTemplate放入spring容器 -->
<!--    <bean name="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" >
        <property name="dataSource" ref="dataSource"></property>
    </bean>-->

    <!-- 3.将UserDao放入spring容器 -->
    <bean name="userDao" class="com.kankan.jdbctemplate.UserDaoImpl" >
         <!--<property name="jt" ref="jdbcTemplate" ></property>-->
        <property name="dataSource" ref="dataSource" ></property>
    </bean>

</beans>

4.1 读取外部的Properties配置
　　 db.properties 注意加前缀（更好区分，防止重名）

 <!--指定spring读取db.properties配置文件-->
    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 1.将连接池放入spring容器 -->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}" ></property>
        <property name="driverClass" value="${jdbc.driverClass}" ></property>
        <property name="user" value="${jdbc.user}" ></property>
        <property name="password" value="${jdbc.password}" ></property>
    </bean>

二、使用注解配置spring
　　1.事务回顾
　　 事务特性:acid

事务并发问题：脏读、不可重复读、幻读

事务的隔离级别：1 读未提交、2 读已提交、4 可重复读、8 串行化

2.spring封装了事务管理代码
　　 事务操作：打开事务、提交事务、回滚事务

事务操作对象
　　 因为在不同平台,操作事务的代码各不相同.spring提供了一个接口

2.1 PlatformTransactionManager 接口
　　 DataSourceTransactionManager

HibernateTransitionmanager

注意:在spring中玩事务管理.最为核心的对象就是TransactionManager对象

2.2 spring管理事务的属性介绍
　　 事务的隔离级别：1 读未提交、2 读已提交、4 可重复读、8 串行化

是否只读：true 只读、false 可操作

事务的传播行为：

<?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"
       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">

    <!--指定spring读取db.properties配置文件-->
    <context:property-placeholder location="classpath:db.properties"/>

    <!-- 1.将连接池放入spring容器 -->
    <bean name="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" >
        <property name="jdbcUrl" value="${jdbc.jdbcUrl}" ></property>
        <property name="driverClass" value="${jdbc.driverClass}" ></property>
        <property name="user" value="${jdbc.user}" ></property>
        <property name="password" value="${jdbc.password}" ></property>
    </bean>

    <!-- 2.将UserDao放入spring容器 -->
    <bean name="accountDao" class="com.kankan.dao.AccountDaoImpl" >
         <!--<property name="jt" ref="jdbcTemplate" ></property>-->
        <property name="dataSource" ref="dataSource" ></property>
    </bean>

    <!-- 3.将accountService放入spring容器 -->
    <bean name="accountService" class="com.kankan.service.AccountServiceImpl" >
        <!--<property name="jt" ref="jdbcTemplate" ></property>-->
        <property name="ad" ref="accountDao" ></property>
    </bean>


</beans>

package com.kankan.dao;

/**
 * @author kankan
 * @creater 2019-04-30 15:00
 */
public interface AccountDao {

    //加钱
    void addMoney(Integer id,Double money);

    //减钱
    void delMoney(Integer id,Double money);
}

package com.kankan.dao;

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

/**
 * @author kankan
 * @creater 2019-04-30 15:07
 */
public class AccountDaoImpl extends JdbcDaoSupport implements AccountDao {

    @Override
    public void addMoney(Integer id, Double money) {
        getJdbcTemplate().update("UPDATE t_account SET money = money+? WHERE id=?",money,id);

    }

    @Override
    public void delMoney(Integer id, Double money) {
        getJdbcTemplate().update("UPDATE t_account SET money = money-? WHERE id=?",money,id);
    }
}

package com.kankan.service;

/**
 * @author kankan
 * @creater 2019-04-30 15:32
 */
public interface AccountService {

    //转账方法
    void transfer(Integer from,Integer to,Double money);

}

package com.kankan.service;

import com.kankan.dao.AccountDao;

/**
 * @author kankan
 * @creater 2019-04-30 15:33
 */
public class AccountServiceImpl implements AccountService {

    private AccountDao ad;

    public AccountDao getAd() {
        return ad;
    }

    public void setAd(AccountDao ad) {
        this.ad = ad;
    }

    @Override
    public void transfer(Integer from, Integer to, Double money) {

        //加钱
        ad.addMoney(from,money);

        //减钱
        ad.delMoney(to,money);

    }
}

jdbc.jdbcUrl=jdbc:mysql://localhost:3306/user
jdbc.driverClass=com.mysql.jdbc.Driver
jdbc.user=root
jdbc.password=123

package com.kankan.tx;

import com.kankan.service.AccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.annotation.Resource;

/**
 * @author kankan
 * @creater 2019-04-30 15:52
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:spring-config.xml")
public class Demo {
    @Resource(name = "accountService")
    private AccountService as;

    @Test
    public void fun1(){
        as.transfer(1,2,100d);
    }
}

3.spring管理事务方式

3.1 编码式（了解）
　　 3.1.1 将核心事务管理器配置到spring容器

<!--事务核心管理器，封装了所有事务操作，依赖于连接池-->
    <bean name="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <!--引用类型注入-->
        <!--为transactionManager对象中dataSource属性注入dataSource对象-->
        <property name="dataSource" ref="dataSource"></property>
    </bean>

3.1.2 配置TransactionTemplate模板

 <!--事务模板对象-->
    <bean name="transactionTemplate" class="org.springframework.transaction.support.TransactionTemplate">
        <!--为transactionTemplate对象中transactionManager属性注入transactionManager对象-->
        <property name="transactionManager" ref="transactionManager"></property>
    </bean>

3.1.3 将事务模板注入Service

<!-- 3.Service -->
    <bean name="accountService" class="com.kankan.service.AccountServiceImpl" >
        <!--<property name="jt" ref="jdbcTemplate" ></property>-->
        <!--引用类型注入-->
        <!--为accountService对象中ad属性注入accountDao对象-->
        <property name="ad" ref="accountDao" ></property>

        <!--为accountService对象中tt属性注入transactionTemplate对象-->
        <property name="tt" ref="transactionTemplate"></property>
    </bean>

3.1.4 在Service中调用模板

package com.kankan.service;

import com.kankan.dao.AccountDao;
import org.springframework.transaction.TransactionStatus;
import org.springframework.transaction.support.TransactionCallbackWithoutResult;
import org.springframework.transaction.support.TransactionTemplate;

/**
 * @author kankan
 * @creater 2019-04-30 15:33
 */
public class AccountServiceImpl implements AccountService {

    private AccountDao ad;

    private TransactionTemplate tt;

    public TransactionTemplate getTt() {
        return tt;
    }

    public void setTt(TransactionTemplate tt) {
        this.tt = tt;
    }

    public AccountDao getAd() {
        return ad;
    }

    public void setAd(AccountDao ad) {
        this.ad = ad;
    }

    //匿名内部类访问外部要加final
    @Override
    public void transfer(final Integer from, final Integer to, final Double money) {

        //封装好事务函数
        //打开事务
        //调用doInTransactionWithoutResult -- 出异常会回滚事务
        //提交事务
        tt.execute(new TransactionCallbackWithoutResult() {
            @Override
            protected void doInTransactionWithoutResult(TransactionStatus transactionStatus) {
                //加钱
                ad.addMoney(from,money);

                int i = 1/0;//触发错误，验证代码是否正确

                //减钱
                ad.delMoney(to,money);
            }
        });
    }
}

事务中有异常发生时候：


3.2 xml配置(aop)
　　 3.2.1 导包
　　 aop、aspect、aop联盟和weaving织入包

3.2.2 导入新的约束(tx)

beans: 最基本
　　 context:读取properties配置
　　 aop:配置aop
　　 tx:配置事务通知
3.2.3 配置通知

<!-- 配置事务通知 -->
    <tx:advice id="txAdvice" transaction-manager="transactionManager" >
        <tx:attributes>
            <!-- 以方法为单位,指定方法应用什么事务属性
                isolation:隔离级别
                propagation:传播行为
                read-only:是否只读
             -->
            <tx:method name="save*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="persist*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="update*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="modify*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="delete*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="remove*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
            <tx:method name="get*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true" />
            <tx:method name="find*" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="true" />
            <tx:method name="transfer" isolation="REPEATABLE_READ" propagation="REQUIRED" read-only="false" />
        </tx:attributes>
    </tx:advice>

3.2.4 配置将通知织入目标

<!-- 配置织入 -->
    <aop:config  >
        <!-- 配置切点表达式 -->
        <aop:pointcut expression="execution(* com.kankan.service.*ServiceImpl.*(..))" id="txPc"/>
        <!-- 配置切面 : 通知+切点
                 advice-ref:通知的名称
                 pointcut-ref:切点的名称
         -->
        <aop:advisor advice-ref="txAdvice" pointcut-ref="txPc" />
    </aop:config>

3.3 注解配置(aop)
　　 导包、tx约束和xml配置(aop)相同
　　 3.3.1 开启注解管理事务

<!-- 开启使用注解管理aop事务 -->
<tx:annotation-driven/>

3.3.2 使用注解

package com.kankan.tx;

import com.kankan.service.AccountService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;

import javax.annotation.Resource;

/**
 * @author kankan
 * @creater 2019-04-30 15:52
 */
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration("classpath:applicationContext2.xml")
public class Demo1 {
    @Resource(name = "accountService")
    private AccountService as;

    @Test
    public void fun1(){
        as.transfer(1,2,100d);
    }
}