Spring中框架

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1、JdbcTemplate 概述

1.1、什么是 JdbcTemplate

JdbcTemplate 是 Spring 对 JDBC 的封装，目的是使 JDBC 更加易于使用。JdbcTemplate 是 Spring 的一部分。JdbcTemplate 处理了资源的建立和释放。他帮助我们避免一些常见的错误，比如忘了总要关闭连接。他运行核心的 JDBC 工作流，如 Statement 的建立和执行，而我们只需要提供 SQL 语句和提取结果。

1.2、Spring 中其他操作模板

操作关系型数据的：

JdbcTemplate

HibernateTemplate

操作 nosql 数据库的：

RedisTemplate

操作消息队列的：

JmsTemplate

1.3、JdbcTemplate 对象产生

org.springframework.jdbc.core.JdbcTemplate 类

public JdbcTemplate() {
}
 
public JdbcTemplate(DataSource dataSource) {setDataSource(dataSource);
afterPropertiesSet();}
 
public JdbcTemplate(DataSource dataSource, boolean lazyInit) {setDataSource(dataSource);
setLazyInit(lazyInit);
afterPropertiesSet();}

注意：

lazyInit 是否延迟初始化 SQLExceptionTranslator

1.4、JdbcTemplate 常用方法

**execute 方法：** 可以用于执行任何 SQL 语句，一般用于执行 DDL 语句；

**update 方法及 batchUpdate 方法：**update 方法用于执行新增、修改、删除等语句；batchUpdate 方法用于执行批处理相关语句；

**query 方法及 queryForXXX 方法：** 用于执行查询相关语句；

**call 方法：** 用于执行存储过程、函数相关语句。

2、JdbcTemplate 使用 - 上

2.1、创建项目

创建 maven 项目 spring007

2.2、导入 jar 包

一个是 jdbc、tx 的 jar 包

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>com.tyschool</groupId>
    <artifactId>spring007</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.13.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.2.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
        <dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.3</version>
        </dependency>
        <dependency>
            <groupId>commons-dbutils</groupId>
            <artifactId>commons-dbutils</artifactId>
            <version>1.6</version>
        </dependency>
    </dependencies>
</project>

2.3、编写配置文件

applicationContext.xml

<?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">
    <!-- 配置数据源 -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- 连接数据库的必备信息 -->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC"></property>
        <property name="user" value="root"></property>
        <property name="password" value="Root12345"></property>
    </bean>
    <!-- 配置一个数据库的操作模板：JdbcTemplate -->
    <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate">
        <property name="dataSource" ref="dataSource"></property>
    </bean>
</beans>

2.4、创建 javabean

Manager.java

package com.tyschool.spring007.javabean;
 
import java.io.Serializable;
import java.util.Date;
 
public class Manager  implements Serializable {private int mid;
    private String uname;
    private String pword;
    private Date zcsj;
 
    public int getMid() {return mid;
    }
 
    public void setMid(int mid) {this.mid = mid;
    }
 
    public String getUname() {return uname;
    }
 
    public void setUname(String uname) {this.uname = uname;
    }
 
    public String getPword() {return pword;
    }
 
    public void setPword(String pword) {this.pword = pword;
    }
 
    public Date getZcsj() {return zcsj;
    }
 
    public void setZcsj(Date zcsj) {this.zcsj = zcsj;
    }
 
    @Override
    public String toString() {return "Manager{" +
                "mid=" + mid +
                ", uname='" + uname + '\'' +
                ", pword='" + pword + '\'' +
                ", zcsj=" + zcsj +
                '}';
    }
}

2.5、创建持久层

IManagerDao.java

import com.tyschool.spring007.javabean.Manager;
import java.util.List;
 
public interface IManagerDao {public List findAll();
    public Manager findById(int mid);
    public int updateManager(Manager m);
    public int addManager(Manager m);
    public int deleteManager(int mid);
    public List findByName(String name);
    public int allCount();
 
}

ManagerDaoImpl.java

import com.tyschool.spring007.javabean.Manager;
import com.tyschool.spring007.manager.dao.IManagerDao;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.JdbcTemplate;
 
import java.util.ArrayList;
import java.util.List;
import java.util.Map;
 
public class ManagerDaoImpl implements IManagerDao {private JdbcTemplate jdbcTemplate;
 
    public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {this.jdbcTemplate = jdbcTemplate;
    }
 
    public List findAll() {String sql="select * from manager";
        List<Manager> list=jdbcTemplate.query(sql,new BeanPropertyRowMapper<Manager>(Manager.class));
        return list;
    }
 
    public Manager findById(int mid) {String sql="select * from manager where mid=?";
        Manager m=jdbcTemplate.queryForObject(sql,new BeanPropertyRowMapper<Manager>(Manager.class),mid);
        return  m;
    }
 
    public int updateManager(Manager m) {String sql="update manager set uname=?,pword=?,zcsj=? where mid=?";
        int n=jdbcTemplate.update(sql,m.getUname(),m.getPword(),m.getZcsj(),m.getMid());
        return n;
    }
 
    public int addManager(Manager m) {String sql="insert into manager(uname,pword,zcsj)values(?,?,?)";
        int n=jdbcTemplate.update(sql,m.getUname(),m.getPword(),m.getZcsj());
        return n;
    }
 
    public int deleteManager(int mid) {String sql="delete from manager where mid=?";
        int n=jdbcTemplate.update(sql,mid);
        return n;
    }
 
    public List findByName(String name) {String sql="select * from manager where uname like ?";
        List<Manager> list=jdbcTemplate.query(sql,new BeanPropertyRowMapper<Manager>(Manager.class),name);
        return list;
    }
 
    public int allCount() {String sql="select count(*) from manager";
        int n=jdbcTemplate.queryForObject(sql,Integer.class);
        return n;
    }
}

3、JdbcTemplate 使用 - 下

3.1、创建业务层

IManagerService.java

import com.tyschool.spring007.javabean.Manager;
import java.util.List;
 
public interface IManagerService {public List findAll();
    public Manager findById(int mid);
    public int updateManager(Manager m);
    public int addManager(Manager m);
    public int deleteManager(int mid);
    public List findByName(String name);
    public int allCount();
}

ManagerServiceImpl.java

import com.tyschool.spring007.javabean.Manager;
import com.tyschool.spring007.manager.dao.IManagerDao;
import com.tyschool.spring007.manager.service.IManagerService;
 
import java.util.List;
 
public class ManagerServiceImpl implements IManagerService {
    IManagerDao managerDao;
 
    public void setManagerDao(IManagerDao managerDao) {this.managerDao = managerDao;
    }
 
    public List findAll() {return managerDao.findAll();}
 
    public Manager findById(int mid) {return managerDao.findById(mid);
    }
 
    public int updateManager(Manager m) {return managerDao.updateManager(m);
    }
 
    public int addManager(Manager m) {return managerDao.addManager(m);
    }
 
    public int deleteManager(int mid) {return managerDao.deleteManager(mid);
    }
 
    public List findByName(String name) {return managerDao.findByName(name);
    }
 
    public int allCount() {return managerDao.allCount();}
}

3.2、修改配置文件

 <bean id="managerDaoImpl" class="com.tyschool.spring007.manager.dao.impl.ManagerDaoImpl">
        <property name="jdbcTemplate" ref="jdbcTemplate"></property>
    </bean>
    <bean id="managerServiceImpl" class="com.tyschool.spring007.manager.service.impl.ManagerServiceImpl">
        <property name="managerDao" ref="managerDaoImpl"></property>
    </bean>

3.3、创建测试类

STest.java

import com.tyschool.spring007.javabean.Manager;
import com.tyschool.spring007.manager.service.IManagerService;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.jdbc.core.JdbcTemplate;
 
import java.util.Date;
import java.util.List;
import java.util.Map;
 
public class STest {ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
    IManagerService managerService=(IManagerService) ac.getBean("managerServiceImpl");
    @Test
    public void deleteManager(){managerService.deleteManager(4);
    }
    @Test
    public void addManager(){Manager m=new Manager();
        m.setUname("李攻");
        m.setPword("zhangsan");
        m.setZcsj(new Date());
        managerService.addManager(m);
    }
    @Test
    public void updateManager(){Manager m=new Manager();
        m.setMid(5);
        m.setUname("李四");
        m.setPword("lisi");
        m.setZcsj(new Date());
        managerService.updateManager(m);
    }
    @Test
    public void findAll(){List<Manager> list= managerService.findAll();
        for(Manager m:list){System.out.println(m);
        }
    }
    @Test
    public void findById(){Manager m=managerService.findById(5);
        System.out.println(m);
    }
    @Test
    public void findByName(){List<Manager> list=managerService.findByName("李 %");
        for(Manager m:list){System.out.println(m);
        }
    }
    @Test
    public void allCount(){int n= managerService.allCount();
        System.out.println(n);
    }
}

4、数据源配置

4.1、C3P0 数据源

<dependency>
            <groupId>com.mchange</groupId>
            <artifactId>c3p0</artifactId>
            <version>0.9.5.3</version>
</dependency>

<!-- 配置数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
        <!-- 连接数据库的必备信息 -->
        <property name="driverClass" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="jdbcUrl" value="jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC"></property>
        <property name="user" value="root"></property>
        <property name="password" value="Root12345"></property>
</bean>

4.2、DBCP 数据源

需要导入二个 jar 包，commons-dbcp.jar, commons-pool.jar

<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-dbcp2</artifactId>
            <version>2.6.0</version>
</dependency>
<dependency>
            <groupId>org.apache.commons</groupId>
            <artifactId>commons-pool2</artifactId>
            <version>2.7.0</version>
</dependency>

<bean id="dataSource" class="org.apache.commons.dbcp2.BasicDataSource"> 
<property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
<property name="url" value="jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC"></property> 
<property name="username" value="root"></property>
<property name="password" value="Root12345"></property>
</bean>

4.3、Druid 数据源

需要导入一个 jar 包，druid.jar

 <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.22</version>
</dependency>

<bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" destroy-method = "close" >
        <!-- 数据库基本信息配置 -->
        <property name = "driverClassName" value = "com.mysql.cj.jdbc.Driver" />
        <property name = "url" value = "jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC" />
        <property name = "username" value = "root" />
        <property name = "password" value = "Root12345" />
</bean>

4.4、Spring 内置数据源

需要导入一个 jar 包，spring-jdbc.jar

<bean id="dataSource"          class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="com.mysql.cj.jdbc.Driver"></property>
        <property name="url" value="jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC"></property>
        <property name="username" value="root"></property>
        <property name="password" value="Root12345"></property>
    </bean>

4.5、优化配置

4.5.1、创建一个 db.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC
jdbc.username=root
jdbc.password=Root12345

4.5.2、引入 db.properties

方式一：

<bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
        <property name="location" value="classpath:db.properties"/>
</bean>

方式二：

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

4.5.3、修改数据源配置

 <bean id = "dataSource" class = "com.alibaba.druid.pool.DruidDataSource" destroy-method = "close" >
        <!-- 数据库基本信息配置 -->
        <property name = "driverClassName" value = "${jdbc.driver}" />
        <property name = "url" value = "${jdbc.url}" />
        <property name = "username" value = "${jdbc.username}" />
        <property name = "password" value = "${jdbc.password}" />
    </bean>

测试

5、JdbcTemplate 用法提升

5.1、queryForMap 返回一个 Map 集合

5.1.1、修改 ManagerDaoImpl.java

public Map findById1(int mid) {String sql="select * from manager where mid=?";
        Map m=jdbcTemplate.queryForMap(sql,mid);
        return m;
}

5.1.2、修改 STest.java

 @Test
    public void findById1(){Map m=managerService.findById1(5);
        System.out.println(m);
    }

5.2、queryForList 返回一个 List 集合

5.2.1、修改 ManagerDaoImpl.java

public List findById2(int n) {String sql="select * from manager where mid>?";
        List list=jdbcTemplate.queryForList(sql,n);
        return list;
}

5.2.2、修改 STest.java

@Test
public void findById2(){List list=managerService.findById2(5);
        System.out.println(list);
}

5.3、RowMapper 返回自定义对象

5.3.1、修改 ManagerDaoImpl.java

public List findAll1() {String sql="select * from manager";
        List list=jdbcTemplate.query(sql, new RowMapper() {public Object mapRow(ResultSet rs, int rowNum) throws SQLException {Manager m=new Manager();
                m.setMid(rs.getInt("mid"));
                m.setUname(rs.getString("uname"));
                m.setPword(rs.getString("pword"));
                m.setZcsj(rs.getDate("zcsj"));
 
                return m;
            }
        });
        return list;
    }

5.3.2、修改 STest.java

 @Test
    public void findAll1(){List list=managerService.findAll1();
        System.out.println(list);
    }

6、继承 JdbcDaoSupport

6.1、JdbcDaoSupport 类

JdbcDaoSupport 是 spring 框架为我们提供的一个类，该类中定义了一个 JdbcTemplate 对象，我们可以直接获取使用，但是要想创建该对象，需要为其提供一个数据源。

6.2、新建 dao 实现类

ManagerDaoImpl1.java

import com.tyschool.spring007.javabean.Manager;
import com.tyschool.spring007.manager.dao.IManagerDao;
import org.springframework.jdbc.core.BeanPropertyRowMapper;
import org.springframework.jdbc.core.support.JdbcDaoSupport;
 
import java.util.List;
import java.util.Map;
 
public class ManagerDaoImpl1 extends JdbcDaoSupport implements IManagerDao {public List findAll() {String sql="select * from manager";
        List<Manager> list=getJdbcTemplate().query(sql,new BeanPropertyRowMapper<Manager>(Manager.class));
        return list;
    }
 
    public Manager findById(int mid) {return null;
    }
 
    public int updateManager(Manager m) {return 0;
    }
 
    public int addManager(Manager m) {return 0;
    }
 
    public int deleteManager(int mid) {return 0;
    }
 
    public List findByName(String name) {return null;
    }
 
    public int allCount() {return 0;
    }
 
    public Map findById1(int mid) {return null;
    }
 
    public List findById2(int n) {return null;
    }
 
    public List findAll1() {return null;
    }
}

6.3、修改配置文件

<bean id="managerDaoImpl1" class="com.tyschool.spring007.manager.dao.impl.ManagerDaoImpl1">
        <property name="dataSource" ref="dataSource"></property>
</bean>
<bean id="managerServiceImpl" class="com.tyschool.spring007.manager.service.impl.ManagerServiceImpl">
        <property name="managerDao" ref="managerDaoImpl1"></property>
</bean>

测试

7、Spring 中事务控件

7.1、Spring 中的事务接口

在 spring 中为我们提供了一组事务控制的接口，我们可以直接使用来控制事务，要想使用事务控制接口就必须拥有 spring-tx.jar 的包。

在前面我们通过编程的方式实现了我们的事务，现在我们使用配置的方式来完成我们的事务。

7.2、PlatformTransactionManager 类

PlatformTransactionManager 类中有三个方法来操作事务：

getTransaction(TransactionDefinition definition)// 获取事务状态信息

commit(TransactionStatus status)// 提交事务

roolback(TransactionStatus status)// 回滚事务

在事务中我们实际管理的对象是：

org.springframework.jdbc.datasource.DataSourceTransactionManager———spring-jdbc\ibatis

org.springframework.orm.hibernate5.HibernateTransactionManager————hibernate

7.2.1、TransactionDefinition

事务定义信息对象，里面的方法有：

getName()：事务对象名称

getIsolationLevel()：事务隔离级别

getPropagationBehavior()：事务传播行为

getTimeout()：事务超时时间

isReadOnly()：事务是否只读

事务状态：

读写型：增加、修改、删除操作

只读型：查询操作

事务隔离级别：

事务传播行为：

事务传播行为指的就是当一个事务方法被另一个事务方法调用时，这个事务方法应该如何进行。

required

@Transactional(propagation = Propagation.REQUIRED)
public void methodA() {methodB();
// do something
}
 
@Transactional(propagation = Propagation.REQUIRED)
public void methodB() {// do something
}

单独调用 methodB 方法时，因为当前上下文不存在事务，所以会开启一个新的事务。
调用 methodA 方法时，因为当前上下文不存在事务，所以会开启一个新的事务。当执行到 methodB 时，methodB 发现当前上下文有事务，因此就加入到当前事务中来。

supports

@Transactional(propagation = Propagation.REQUIRED)
public void methodA() {methodB();
// do something
}
// 事务属性为 SUPPORTS
@Transactional(propagation = Propagation.SUPPORTS)
public void methodB() {// do something
}

单纯的调用 methodB 时，methodB 方法是非事务的执行的。当调用 methdA 时,methodB 则加入了 methodA 的事务中, 事务地执行。

超时时间：

有的时候为了系统中关键部分的性能问题，它的事务执行时间应该尽可能的短。因此可以给这些事务设置超时时间，以秒为单位。默认值是 -1，没有超时限制。

事务是否只读：

如果后端数据库发现当前事务为只读事务，那么就会进行一系列的优化措施。因此，只有对于那些有可能启动一个新事务的传播行为（REQUIRED,REQUIRES_NEW,NESTED）的方法来说，才有意义。

7.2.2、TransactionStatus

事务对象的状态信息，方法有：

flush()// 刷新事务

hasSavepoint()// 获取是否存在的存储点

isCompleted()// 事务是否完成

isNewTransaction()// 获取事务是否为新事务

isRollbackOnly()// 获取事务是否回滚

setRollbackOnly()// 设置事务回滚

8、基于 XML 事务控制

8.1、修改配置头部信息

xmlns:context="http://www.springframework.org/schema/tx"   xmlns:context="http://www.springframework.org/schema/aop"
 
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

8.2、配置事务管理器

 <!-- 配置一个事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
</bean>

8.3、配置事务

<!-- 事务配置 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager" ></tx:advice>

8.4、配置事务属性

<!-- 事务配置 -->
<tx:advice id="txAdvice" transaction-manager="transactionManager" >
<tx:attributes>
 <tx:method name="*" read-only="false" propagation="REQUIRED"/>
 <tx:method name="find*" read-only="true" propagation="SUPPORTS"/>
</tx:attributes>
</tx:advice>

8.5、配置 AOP 切入点

<!-- 面向切面配置 -->
<aop:config>
<!-- 配置切入点 -->
<aop:pointcut id="pt1" expression="execution(* com.tyschool.spring007.manager.service.impl.*.*(..))"/>
</aop:config>

8.6、配置切入及通知

 <!-- 面向切面配置 -->
<aop:config>
<!-- 配置切入点 -->
<aop:pointcut id="pt1" expression="execution(* com.tyschool.spring007.manager.service.impl.*.*(..))"/>
<!-- 通知与切入点表达式关系 -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt1"/>
</aop:config>

8.7、修改 ManagerDaoImpl1.java

public int updateManager(Manager m) {String sql="update manager set pword=? where mid=?";
        getJdbcTemplate().update(sql,"1234567",5);
        int n=1/0;
        getJdbcTemplate().update(sql,"1234567",3);
        return 0;
}

测试

9、基于注解事务控制（项目创建）

9.1、创建新项目

创建一个注解的项目 spring008

9.2、导包

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>
 
    <groupId>com.tyschool</groupId>
    <artifactId>spring008</artifactId>
    <version>1.0-SNAPSHOT</version>
    <dependencies>
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-core</artifactId>
            <version>2.13.0</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-beans</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-expression</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-context</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aop</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-aspects</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>aopalliance</groupId>
            <artifactId>aopalliance</artifactId>
            <version>1.0</version>
        </dependency>
        <dependency>
            <groupId>org.aspectj</groupId>
            <artifactId>aspectjweaver</artifactId>
            <version>1.9.5</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-test</artifactId>
            <version>5.2.2.RELEASE</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-jdbc</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-tx</artifactId>
            <version>5.2.2.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <version>8.0.11</version>
        </dependency>
    </dependencies>
 
</project>

9.3、创建 javabean

package com.tyschool.spring008.javabean;
 
import java.io.Serializable;
import java.util.Date;
 
public class Manager  implements Serializable {private int mid;
    private String uname;
    private String pword;
    private Date zcsj;
 
    public int getMid() {return mid;
    }
 
    public void setMid(int mid) {this.mid = mid;
    }
 
    public String getUname() {return uname;
    }
 
    public void setUname(String uname) {this.uname = uname;
    }
 
    public String getPword() {return pword;
    }
 
    public void setPword(String pword) {this.pword = pword;
    }
 
    public Date getZcsj() {return zcsj;
    }
 
    public void setZcsj(Date zcsj) {this.zcsj = zcsj;
    }
 
    @Override
    public String toString() {return "Manager{" +
                "mid=" + mid +
                ", uname='" + uname + '\'' +
                ", pword='" + pword + '\'' +
                ", zcsj=" + zcsj +
                '}';
    }
}

9.4、创建持久层与业务层

//IManagerDao.java
import com.tyschool.spring008.javabean.Manager;
 
public interface IManagerDao {public int updateManager(Manager m1, Manager m2);
}
 
//ManagerDaoImpl.java
import com.tyschool.spring008.javabean.Manager;
import com.tyschool.spring008.manager.dao.IManagerDao;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.stereotype.Repository;
 
@Repository("managerDaoImpl")
public class ManagerDaoImpl  implements IManagerDao {@Autowired
    @Qualifier("jdbcTemplate")
    private JdbcTemplate jdbcTemplate;
    public int updateManager(Manager m1, Manager m2) {String sql="update manager set pword=? where mid=?";
        int n1=jdbcTemplate.update(sql,m1.getPword(),m1.getMid());
        int n2=jdbcTemplate.update(sql,m2.getPword(),m2.getMid());
        return 0;
    }
}

//IManagerService.java
import com.tyschool.spring008.javabean.Manager;
 
public interface IManagerService {public int updateManager(Manager m1, Manager m2);
}
 
//ManagerServiceImpl.java
import com.tyschool.spring008.javabean.Manager;
import com.tyschool.spring008.manager.dao.IManagerDao;
import com.tyschool.spring008.manager.service.IManagerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
 
@Service("managerServiceImpl")
public class ManagerServiceImpl implements IManagerService {@Autowired
    @Qualifier("managerDaoImpl")
    IManagerDao managerDao;
    public int updateManager(Manager m1, Manager m2) {return managerDao.updateManager(m1,m2);
    }
}

9.5、配置 applicationContext.xml

<?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"
       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/aop
       http://www.springframework.org/schema/aop/spring-aop.xsd">
    <!--spring 创建对象时要扫描的包 -->
    <context:component-scan base-package="com.tyschool.spring008"></context:component-scan>
</beans>

9.6、编写 Bean

db.properties

jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=jdbc:mysql://192.168.1.123:3306/spring?serverTimezone=UTC
jdbc.username=root
jdbc.password=Root12345

DbUtilsC3P0.java

import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.PropertySource;
import org.springframework.jdbc.core.JdbcTemplate;
import org.springframework.jdbc.datasource.DriverManagerDataSource;
import org.springframework.stereotype.Component;
 
import javax.sql.DataSource;
@Component
@PropertySource(value={"classpath:db.properties"},ignoreResourceNotFound = false)
public class DbUtilsC3P0 {@Value("${jdbc.driver}")
    private String driver;
    @Value("${jdbc.url}")
    private String url;
    @Value("${jdbc.username}")
    private String username;
    @Value("${jdbc.password}")
    private String password;
    // 配置数据源 
    @Bean(name="dataSource")
    public DataSource createDateSource(){DriverManagerDataSource cds=new DriverManagerDataSource();
            cds.setDriverClassName(driver);
            cds.setUrl(url);
            cds.setUsername(username);
            cds.setPassword(password);
        return cds;
    }
    @Bean(name="jdbcTemplate")
    public JdbcTemplate createJdbcTemplate(DataSource dataSource){return new JdbcTemplate(dataSource);
    }
}

9.7、编写测试类

import com.tyschool.spring008.javabean.Manager;
import com.tyschool.spring008.manager.service.IManagerService;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
import java.util.Date;
 
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(value={"classpath:applicationContext.xml"})
public class STest {@Autowired
    @Qualifier("managerServiceImpl")
    IManagerService managerService;
 
    @Test
    public void updateManager(){Manager m1=new Manager();
        m1.setMid(5);
        m1.setUname("李四");
        m1.setPword("lisi1");
        m1.setZcsj(new Date());
 
        Manager m2=new Manager();
        m2.setMid(6);
        m2.setUname("李四");
        m2.setPword("lisi1");
        m2.setZcsj(new Date());
        managerService.updateManager(m1,m2);
    }
}

10、基于注解事务控制（事务处理）

10.1、配置事务管理器

<!-- 配置事务管理器 -->
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
        <property name="dataSource" ref="dataSource"></property>
</bean>

10.2、@Transactional 注解

修改 ManagerServiceImpl.java

import com.tyschool.spring008.javabean.Manager;
import com.tyschool.spring008.manager.dao.IManagerDao;
import com.tyschool.spring008.manager.service.IManagerService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;
 
@Service("managerServiceImpl")
@Transactional(readOnly=true,propagation= Propagation.SUPPORTS)
public class ManagerServiceImpl implements IManagerService {@Autowired
    @Qualifier("managerDaoImpl")
    IManagerDao managerDao;
    @Transactional(readOnly = false,propagation = Propagation.REQUIRED)
    public int updateManager(Manager m1, Manager m2) {return managerDao.updateManager(m1,m2);
    }
}

注意：

@Transactional

出现接口上，表示该接口的所有实现类都有事务支持。

出现在类上，表示类中所有方法有事务支持

出现在方法上，表示方法有事务支持。

优先级：方法、类、接口

10.3、开启事务支持

<!-- 开启 spring 对注解事务的支持 --> 
<tx:annotation-driven transaction-manager="transactionManager"/>

测试

11、基于纯配置类事务控制

11.1、编写配置类

import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.EnableAspectJAutoProxy;
import org.springframework.context.annotation.Import;
import org.springframework.transaction.annotation.EnableTransactionManagement;
 
 
@Configuration
@ComponentScan("com.tyschool.spring008")
@Import({DbUtilsC3P0.class})
@EnableTransactionManagement
public class SpringApplicationContext {
 
}

注意：

@EnableTransactionManagement

开启 spring 对注解事务的支持

11.2、修改 DbUtilsC3P0.java

@Bean(name="transactionManager")
public DataSourceTransactionManager createTransactionManager(DataSource dataSource){return new DataSourceTransactionManager(dataSource);
    }

11.3、修改测试类

@ContextConfiguration(classes = com.tyschool.spring008.utils.SpringApplicationContext.class)

测试