时间:2021-07-01 10:21:17 帮助过:12人阅读
aspectJ的aop操作(基于注解,对比day02配置操作)(会用)
*jdbcTemplate操作(实现CRUD)
*spring配置连接池
*spring事务管理
一、AspectJ的基于注解的AOP操作
(day02的配置回顾,略显麻烦,配置稍多)
建立项目记得导入day02操作aop的那些包(如果是复制项目一定要修改项目的context name)
再把配置文件拿过来
- <span style="font-size: 16px"><?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"<span style="color: #000000">
- xmlns:xsi</span>="http://www.w3.org/2001/XMLSchema-instance"<span style="color: #000000">
- xmlns:aop</span>="http://www.springframework.org/schema/aop" xsi:schemaLocation=<span style="color: #000000">"
- </span> http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/beans </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/beans/spring-beans-4.3.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/aop </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/aop/spring-aop.xsd</span><span style="color: #008000">"> </span>
- <!-- 开启aop代理(开启aop操作) -->
- <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
- <!-- 配置创建对象 -->
- <bean id="book" <span style="color: #0000ff">class</span>="cn.aop.Book"></bean>
- <bean id="buyBook" <span style="color: #0000ff">class</span>="cn.aop.BuyBook"></bean>
- </beans></span>
建立两个类:Book 和 BuyBook
依旧使用配置文件创建对象,开启aop操作
在增强的类上使用注解实现增强的操作
在增强的类上使用注解完成aop操作
在类上加@Aspect
在方法上加真正的注解
@Before 前置通知
@AfterReturning 后置通知
@Around 环绕通知
@AfterThrowing 抛出通知
@After 最终通知
value属性值为原来的表达式的值
(表达式写法需要注意)
其它项目不用时请将其关闭!
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.aop;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> Book {
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> buy(){
- System.out.println(</span>"Book.buy"<span style="color: #000000">);
- }
- }</span></span>
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.aop;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.aspectj.lang.annotation.Aspect;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.aspectj.lang.annotation.Before;
- @Aspect
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> BuyBook {
- </span><span style="color: #008000">//</span><span style="color: #008000">方法上使用注解完成真正的增强操作</span>
- @Before(value="execution(* cn.aop.Book.*(..))"<span style="color: #000000">)
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> before1(){
- System.out.println(</span>"BuyBook.before"<span style="color: #000000">);
- }
- }</span></span>
二、jdbcTemplate操作
spring是一站式的框架,对应javaEE三层框架都有不同的解决方案,jdbcTemplate就是对应于DAO层的
spring对不同的持久化层技术都作了不同的支持
JDBC === jdbcTemplate
Hibernate === HibernateTemplate (少写很多的操作)
MyBatis JPA等都有不同的支持
jdbcTemplate使用(CRUD操作)和DBUtils比较类似(但是并没有DBUtils方便,只是jdbc模板是spring封装好的)
具体的使用:
准备工作:
导包:spring-jdbc spring-tx(事务)
说到数据库,当然少不了最最最基本驱动jar包
添加:
依赖连接池获得连接,创建对象,设置数据库信息
创建jdbcTemplate对象,设置数据源
建表
使用jdbcTemplate实现操作(和DBUtils是非常像的)
增加修改在类中,删除不再赘述,只是SQL语句的差异
当然,具体的信息可以通过log4j看到(待补充log4j的详细用法)
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.jdbc;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.junit.Test;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.JdbcTemplate;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.datasource.DriverManagerDataSource;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> JDBCDemo01 {
- @Test
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> add(){
- </span><span style="color: #008000">//</span><span style="color: #008000">创建对象,设置数据库信息</span>
- DriverManagerDataSource dataSource = <span style="color: #0000ff">new</span><span style="color: #000000"> DriverManagerDataSource();
- dataSource.setDriverClassName(</span>"com.mysql.jdbc.Driver"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">本机时可以写成jdbc:mysql:</span><span style="color: #008000">//</span><span style="color: #008000">/mydb</span>
- dataSource.setUrl("jdbc:mysql://localhost:3306/mydb"<span style="color: #000000">);
- dataSource.setUsername(</span>"root"<span style="color: #000000">);
- dataSource.setPassword(</span>"root"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">创建jdbcTemplate对象,设置数据源</span>
- JdbcTemplate jdbcTemplate = <span style="color: #0000ff">new</span><span style="color: #000000"> JdbcTemplate(dataSource);
- </span><span style="color: #008000">//</span><span style="color: #008000">使用jdbcTemplate实现操作(已经建表)</span>
- String sql = "insert into user values(?,?)"<span style="color: #000000">;
- </span><span style="color: #008000">//</span><span style="color: #008000">注意使用的方法,dbutils调的也是update方法,参数是SQL和可变参数</span>
- <span style="color: #0000ff">int</span> i = jdbcTemplate.update(sql, "lulu","123"<span style="color: #000000">);
- System.out.println(i);
- }
- </span><span style="color: #008000">//</span><span style="color: #008000">测试模板的修改方法,这是SQL语句的方法</span>
- <span style="color: #000000"> @Test
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> update(){
- </span><span style="color: #008000">//</span><span style="color: #008000">创建对象,设置数据库信息</span>
- DriverManagerDataSource dataSource = <span style="color: #0000ff">new</span><span style="color: #000000"> DriverManagerDataSource();
- dataSource.setDriverClassName(</span>"com.mysql.jdbc.Driver"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">本机时可以写成jdbc:mysql:</span><span style="color: #008000">//</span><span style="color: #008000">/mydb</span>
- dataSource.setUrl("jdbc:mysql://localhost:3306/mydb"<span style="color: #000000">);
- dataSource.setUsername(</span>"root"<span style="color: #000000">);
- dataSource.setPassword(</span>"root"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">创建jdbcTemplate对象,设置数据源</span>
- JdbcTemplate jdbcTemplate = <span style="color: #0000ff">new</span><span style="color: #000000"> JdbcTemplate(dataSource);
- String sql </span>= "update user set username=? where username=?"<span style="color: #000000">;
- </span><span style="color: #0000ff">int</span> i = jdbcTemplate.update(sql, "lucy","lulu"<span style="color: #000000">);
- System.out.println(i);
- }
- }</span></span>
*查询:查询是重点
(QueryRunner runner = new QueryRunner(dataSource);
runner.query(sql,new BeanHandler<User>(User.class));
具体的ResultSetHandler可参考DBUtils部分)
使用jdbcTemplate实现查询时,有接口RowMapper,但没有像dbutils一样提供实现类
需要自己提供实现类(学习这个的目的不是为了更加方便,而是一般的,如果允许,尽量使用少的技术)
回顾JDBC底层实现查询结果,将结果集封装到对象中
查询的具体实现:
1.返回某一个值
queryForObject(sql, requiredType) 返回类型,如Integer.class(统计记录数)
2.返回一个对象
jdbcTemplate.queryForObject(sql, rowMapper, args)
第二个是结果集的处理,第三个是可变参数
第二个接口可以写匿名内部类,当然也可以单独写个类(更直观)
RowMapper实现类
class MyRowMapper implements RowMapper<User>{
public User mapRow(ResultSet arg0, int arg1) throws SQLException {
第二个 int arg1 表示行号(结果集的行号)
return null;
3.返回一个集合
jdbcTemplate.query(sql, rowMapper, args)
第三个是可变参数(当然有可省略的重载方法),返回的是集合
数据封装也要自己写
给出一个Demo如下(注意最后给出的实现类):
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.jdbc;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> java.sql.ResultSet;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> java.sql.SQLException;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> java.util.List;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.junit.Test;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.JdbcTemplate;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.RowMapper;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.datasource.DriverManagerDataSource;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> JDBCDemo02 {
- </span><span style="color: #008000">//</span><span style="color: #008000">演示查询返回某个值</span>
- <span style="color: #000000"> @Test
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> count(){
- </span><span style="color: #008000">//</span><span style="color: #008000">创建对象,设置数据库信息</span>
- DriverManagerDataSource dataSource = <span style="color: #0000ff">new</span><span style="color: #000000"> DriverManagerDataSource();
- dataSource.setDriverClassName(</span>"com.mysql.jdbc.Driver"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">本机时可以写成jdbc:mysql:</span><span style="color: #008000">//</span><span style="color: #008000">/mydb</span>
- dataSource.setUrl("jdbc:mysql://localhost:3306/mydb"<span style="color: #000000">);
- dataSource.setUsername(</span>"root"<span style="color: #000000">);
- dataSource.setPassword(</span>"root"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">创建jdbcTemplate对象,设置数据源</span>
- JdbcTemplate jdbcTemplate = <span style="color: #0000ff">new</span><span style="color: #000000"> JdbcTemplate(dataSource);
- String sql </span>= "SELECT COUNT(*) FROM user"<span style="color: #000000">;
- Integer i </span>= jdbcTemplate.queryForObject(sql, Integer.<span style="color: #0000ff">class</span><span style="color: #000000">);
- System.out.println(i);
- }
- </span><span style="color: #008000">//</span><span style="color: #008000">演示返回对象</span>
- <span style="color: #000000"> @Test
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> obj(){
- </span><span style="color: #008000">//</span><span style="color: #008000">创建对象,设置数据库信息</span>
- DriverManagerDataSource dataSource = <span style="color: #0000ff">new</span><span style="color: #000000"> DriverManagerDataSource();
- dataSource.setDriverClassName(</span>"com.mysql.jdbc.Driver"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">本机时可以写成jdbc:mysql:</span><span style="color: #008000">//</span><span style="color: #008000">/mydb</span>
- dataSource.setUrl("jdbc:mysql://localhost:3306/mydb"<span style="color: #000000">);
- dataSource.setUsername(</span>"root"<span style="color: #000000">);
- dataSource.setPassword(</span>"root"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">创建jdbcTemplate对象,设置数据源</span>
- JdbcTemplate jdbcTemplate = <span style="color: #0000ff">new</span><span style="color: #000000"> JdbcTemplate(dataSource);
- String sql </span>= "select * from user where username=?"<span style="color: #000000">;
- </span><span style="color: #008000">//</span><span style="color: #008000">和dbutils类似,也是new一个处理器,不过这里需要自己实现</span>
- User user = jdbcTemplate.queryForObject(sql, <span style="color: #0000ff">new</span> MyRowMapper(), "mary"<span style="color: #000000">);
- System.out.println(user);
- }
- </span><span style="color: #008000">//</span><span style="color: #008000">返回对象集合</span>
- <span style="color: #000000"> @Test
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> objlist(){
- </span><span style="color: #008000">//</span><span style="color: #008000">创建对象,设置数据库信息</span>
- DriverManagerDataSource dataSource = <span style="color: #0000ff">new</span><span style="color: #000000"> DriverManagerDataSource();
- dataSource.setDriverClassName(</span>"com.mysql.jdbc.Driver"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">本机时可以写成jdbc:mysql:</span><span style="color: #008000">//</span><span style="color: #008000">/mydb</span>
- dataSource.setUrl("jdbc:mysql://localhost:3306/mydb"<span style="color: #000000">);
- dataSource.setUsername(</span>"root"<span style="color: #000000">);
- dataSource.setPassword(</span>"root"<span style="color: #000000">);
- </span><span style="color: #008000">//</span><span style="color: #008000">创建jdbcTemplate对象,设置数据源</span>
- JdbcTemplate jdbcTemplate = <span style="color: #0000ff">new</span><span style="color: #000000"> JdbcTemplate(dataSource);
- String sql </span>= "select * from user"<span style="color: #000000">;
- List</span><User> list = jdbcTemplate.query(sql, <span style="color: #0000ff">new</span><span style="color: #000000"> MyRowMapper());
- </span><span style="color: #0000ff">for</span><span style="color: #000000"> (User user : list) {
- System.out.println(user.getUsername());
- }
- }
- }<br>//属性封装需要自己实现
- </span><span style="color: #0000ff">class</span> MyRowMapper <span style="color: #0000ff">implements</span> RowMapper<User><span style="color: #000000">{
- </span><span style="color: #0000ff">public</span> User mapRow(ResultSet rs, <span style="color: #0000ff">int</span> num) <span style="color: #0000ff">throws</span><span style="color: #000000"> SQLException {
- String username </span>= rs.getString("username");<span style="color: #008000">//</span><span style="color: #008000">使用索引更高效</span>
- String password = rs.getString("password"<span style="color: #000000">);
- User user </span>= <span style="color: #0000ff">new</span><span style="color: #000000"> User();
- user.setUsername(username);
- user.setPassword(password);
- </span><span style="color: #0000ff">return</span><span style="color: #000000"> user;
- }
- }</span></span>
三、spring配置连接池和dao使用jdbcTemplate:
导包:
c3p0的两个jar包 c3p0 和依赖包 mchange
在配置连接池(原始方式见数据库连接池部分)
ComboPooledDataSource这个类本身里面就有属性和相关的set()方法
可以使用之前学的属性注入!属性注入注入的属性就是参考set()方法命名规范
bean1.xml配置文件:
可以创建service dao 进行稍微正式的测试,顺便复习属性注入
给JdbcTemplate需要传入dataSource ,需要注意注意这个
service注入dao
dao注入jdbcTemplate
jdbcTemplate注入dataSource
- <span style="font-size: 16px"><?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"<span style="color: #000000">
- xmlns:xsi</span>="http://www.w3.org/2001/XMLSchema-instance"<span style="color: #000000">
- xmlns:aop</span>="http://www.springframework.org/schema/aop" xsi:schemaLocation=<span style="color: #000000">"
- </span> http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/beans </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/beans/spring-beans-4.3.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/aop </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/aop/spring-aop.xsd</span><span style="color: #008000">"> </span>
- <!-- 配置c3p0连接池 -->
- <bean id="dataSource" <span style="color: #0000ff">class</span>="com.mchange.v2.c3p0.ComboPooledDataSource">
- <!-- 进行属性注入 -->
- <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
- <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mydb"></property>
- <property name="user" value="root"></property>
- <property name="password" value="root"></property>
- </bean>
- <!-- 在配置中配置依赖注入 -->
- <bean id="userService" <span style="color: #0000ff">class</span>="cn.c3p0.UserService">
- <!-- service中注入dao -->
- <property name="dao" ref="dao"></property>
- </bean>
- <bean id="dao" <span style="color: #0000ff">class</span>="cn.c3p0.UserDao">
- <!-- dao中注入jdbcTemplate -->
- <property name="jdbcTemplate" ref="jdbcTemplate"></property>
- </bean>
- <!-- 创建模板对象 -->
- <bean id="jdbcTemplate" <span style="color: #0000ff">class</span>="org.springframework.jdbc.core.JdbcTemplate">
- <!-- 给模板注入dataSource,具体可以看源码了解(set()方法等) -->
- <property name="dataSource" ref="dataSource"></property>
- </bean>
- </beans></span>
UserDao:
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.c3p0;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.JdbcTemplate;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> UserDao {
- </span><span style="color: #0000ff">private</span><span style="color: #000000"> JdbcTemplate jdbcTemplate;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setJdbcTemplate(JdbcTemplate jdbcTemplate) {
- </span><span style="color: #0000ff">this</span>.jdbcTemplate =<span style="color: #000000"> jdbcTemplate;
- }
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> add() {
- </span><span style="color: #008000">//</span><span style="color: #008000">在这里使用jdbcTemplate new模板对象的过程都交给spring</span>
- String sql = "insert into user values(?,?)"<span style="color: #000000">;
- </span><span style="color: #0000ff">int</span> i = jdbcTemplate.update(sql, "lilei","112"<span style="color: #000000">);
- System.out.println(i);
- }
- }</span></span>
UserService:
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.c3p0;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> UserService {
- </span><span style="color: #0000ff">private</span><span style="color: #000000"> UserDao dao;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setDao(UserDao dao) {
- </span><span style="color: #0000ff">this</span>.dao =<span style="color: #000000"> dao;
- }
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> add(){
- System.out.println(</span>"service.add"<span style="color: #000000">);
- dao.add();
- }
- }</span></span>
四、spring的事务管理
(不用像之前Hibernate一样写大堆的事务的代码)
事务的回顾见JDBC部分
事务的概念
事务的特性
事务的隔离性产生的问题
spring的事务管理主要有两种方式:
1.编程式事务管理(自己写代码,用的少)
2.声明式事务管理(配置文件实现,注解方式实现(简单易用))
相关的API:
PlatformTransactionManager :spring的事务管理器接口,为不同的持久化框架提供了不同的实现类
例如模板的实现类:dataSourceTransactionManager
Hibernate的实现类:HibernateTransactionManager
无论注解还是配置文件都要配置事务管理器
搭建转账的环境演示事务管理的操作:
建表,添加一些数据
创建service和dao以及注入关系的完成(区分业务层和持久层的区别,业务层只处理业务,持久层只和数据库打交道)
Service:
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.acount;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.transaction.annotation.Transactional;
- @Transactional
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> AcountService {
- </span><span style="color: #0000ff">private</span><span style="color: #000000"> AcountDao dao;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setDao(AcountDao dao) {
- </span><span style="color: #0000ff">this</span>.dao =<span style="color: #000000"> dao;
- }
- </span><span style="color: #008000">//</span><span style="color: #008000">service调dao的方法完成逻辑</span>
- <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> acountMoney(){
- dao.decrese();
- </span><span style="color: #008000">//</span><span style="color: #008000">int i = 1/0;</span>
- <span style="color: #000000"> dao.increse();
- }
- }</span></span>
Dao:
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.acount;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.jdbc.core.JdbcTemplate;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> AcountDao {
- </span><span style="color: #0000ff">private</span><span style="color: #000000"> JdbcTemplate jdbcTemplate;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> setJdbcTemplate(JdbcTemplate jdbcTemplate) {
- </span><span style="color: #0000ff">this</span>.jdbcTemplate =<span style="color: #000000"> jdbcTemplate;
- }
- </span><span style="color: #008000">//</span><span style="color: #008000">减少钱的方法</span>
- <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> decrese(){
- String sql </span>= "update acount set money=money+? where name=?"<span style="color: #000000">;
- jdbcTemplate.update(sql, </span>-1000,"小王"<span style="color: #000000">);
- }
- </span><span style="color: #008000">//</span><span style="color: #008000">增加钱的方法</span>
- <span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> increse(){
- String sql </span>= "update acount set money=money+? where name=?"<span style="color: #000000">;
- jdbcTemplate.update(sql, </span>1000,"小李"<span style="color: #000000">);
- }
- }</span></span>
bean2.xml 要引入事务的操作的约束!
一般以后引入四个约束 beans context aop tx 示例见bean2.xml
可以测试无事务操作时可以正确执行
声明式的事务管理:
xml实现:
(使用的是aop的思想)(jdbc的源码查看dataSourceTransactionManager)
bean2.xml
- <span style="font-size: 16px"><?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"<span style="color: #000000">
- xmlns:xsi</span>="http://www.w3.org/2001/XMLSchema-instance"<span style="color: #000000">
- xmlns:aop</span>="http://www.springframework.org/schema/aop"<span style="color: #000000">
- xmlns:context</span>="http://www.springframework.org/schema/context"<span style="color: #000000">
- xmlns:tx</span>="http://www.springframework.org/schema/tx" xsi:schemaLocation=<span style="color: #000000">"
- </span> http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/beans </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/beans/spring-beans-4.3.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/tx </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/tx/spring-tx.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/context </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/context/spring-context.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/aop </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/aop/spring-aop.xsd</span><span style="color: #008000">"></span>
- <!-- 配置c3p0连接池 -->
- <bean id="dataSource" <span style="color: #0000ff">class</span>="com.mchange.v2.c3p0.ComboPooledDataSource">
- <!-- 进行属性注入 -->
- <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
- <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mydb"></property>
- <property name="user" value="root"></property>
- <property name="password" value="root"></property>
- </bean>
- <!-- 配置service对象 -->
- <bean id="acountService" <span style="color: #0000ff">class</span>="cn.acount.AcountService">
- <!-- service中注入dao -->
- <property name="dao" ref="dao"></property>
- </bean>
- <!-- 配置dao对象 -->
- <bean id="dao" <span style="color: #0000ff">class</span>="cn.acount.AcountDao">
- <!-- dao中注入模板 -->
- <property name="jdbcTemplate" ref="jdbcTemplate"></property>
- </bean>
- <!-- 创建模板对象 -->
- <bean id="jdbcTemplate" <span style="color: #0000ff">class</span>="org.springframework.jdbc.core.JdbcTemplate">
- <!-- 模板中注入dataSource -->
- <property name="dataSource" ref="dataSource"></property>
- </bean>
- <!-- 事务的配置实现 -->
- <!-- 1.配置事务管理器 -->
- <bean id="transactionManager" <span style="color: #0000ff">class</span>="org.springframework.jdbc.datasource.DataSourceTransactionManager">
- <!-- 注入dataSource -->
- <property name="dataSource" ref="dataSource"></property>
- </bean>
- <!-- 2.配置事务增强 ,需要指定事务管理器-->
- <tx:advice id="txadvice" transaction-manager="transactionManager">
- <!-- 做事务操作 -->
- <tx:attributes>
- <!-- 设置进行事务操作的方法匹配规则 -->
- <tx:method name="acount*" propagation="REQUIRED"/>
- </tx:attributes>
- </tx:advice>
- <!-- 3.配置切面 -->
- <aop:config>
- <!-- 3.1切入点 -->
- <aop:pointcut expression="execution(* cn.acount.AcountService.*(...))" id="pointcut1"/>
- <!-- 3.2切面 -->
- <aop:advisor advice-ref="txadvice" pointcut-ref="pointcut1"/>
- </aop:config>
- </beans></span>
进行一个简单的测试:
- <span style="font-size: 16px"><span style="color: #0000ff">package</span><span style="color: #000000"> cn.acount;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.junit.Test;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.context.ApplicationContext;
- </span><span style="color: #0000ff">import</span><span style="color: #000000"> org.springframework.context.support.ClassPathXmlApplicationContext;
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span><span style="color: #000000"> Test01 {
- @Test
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">void</span><span style="color: #000000"> test(){
- ApplicationContext context </span>=
- <span style="color: #0000ff">new</span> ClassPathXmlApplicationContext("bean2.xml"<span style="color: #000000">);
- AcountService service </span>= (AcountService) context.getBean("acountService"<span style="color: #000000">);
- service.acountMoney();
- }
- }</span></span>
注解实现:
配置事务管理器
配置开启注解的操作
在要使用事务的方法所在的类上添加注解@Transactional
会自动找到@注解后对类里的所有方法进行事务操作
此时的配置文件如下:
bean4.xml:
- <span style="font-size: 16px"><?xml version="1.0" encoding="UTF-8"?>
- <beans xmlns="http://www.springframework.org/schema/beans"<span style="color: #000000">
- xmlns:xsi</span>="http://www.w3.org/2001/XMLSchema-instance"<span style="color: #000000">
- xmlns:aop</span>="http://www.springframework.org/schema/aop"<span style="color: #000000">
- xmlns:context</span>="http://www.springframework.org/schema/context"<span style="color: #000000">
- xmlns:tx</span>="http://www.springframework.org/schema/tx" xsi:schemaLocation=<span style="color: #000000">"
- </span> http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/beans </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/beans/spring-beans-4.3.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/tx </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/tx/spring-tx.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/context </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/context/spring-context.xsd</span>
- http:<span style="color: #008000">//</span><span style="color: #008000">www.springframework.org/schema/aop </span><span style="color: #008000; text-decoration: underline">http://www.springframework.org/schema/aop/spring-aop.xsd</span><span style="color: #008000">"> </span>
- <!-- 配置c3p0连接池 -->
- <bean id="dataSource" <span style="color: #0000ff">class</span>="com.mchange.v2.c3p0.ComboPooledDataSource">
- <!-- 进行属性注入 -->
- <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
- <property name="jdbcUrl" value="jdbc:mysql://localhost:3306/mydb"></property>
- <property name="user" value="root"></property>
- <property name="password" value="root"></property>
- </bean>
- <!-- 配置事务管理器-->
- <!-- 1.配置事务管理器 -->
- <bean id="transactionManager" <span style="color: #0000ff">class</span>="org.springframework.jdbc.datasource.DataSourceTransactionManager">
- <!-- 注入dataSource -->
- <property name="dataSource" ref="dataSource"></property>
- </bean>
- <!-- 开启事务的注解 ,指定事务管理器-->
- <tx:annotation-driven transaction-manager="transactionManager"/>
- <!-- 配置service对象 -->
- <bean id="acountService" <span style="color: #0000ff">class</span>="cn.acount.AcountService">
- <!-- service中注入dao -->
- <property name="dao" ref="dao"></property>
- </bean>
- <!-- 配置dao对象 -->
- <bean id="dao" <span style="color: #0000ff">class</span>="cn.acount.AcountDao">
- <!-- dao中注入模板 -->
- <property name="jdbcTemplate" ref="jdbcTemplate"></property>
- </bean>
- <!-- 创建模板对象 -->
- <bean id="jdbcTemplate" <span style="color: #0000ff">class</span>="org.springframework.jdbc.core.JdbcTemplate">
- <!-- 模板中注入dataSource -->
- <property name="dataSource" ref="dataSource"></property>
- </bean>
- </beans></span>
在类上加注解:完整的类信息见xml配置实现
- <span style="font-size: 16px"><span style="color: #000000">@Transactional
- </span><span style="color: #0000ff">public</span> <span style="color: #0000ff">class</span> AcountService {</span>
Spring第三天——JdbcTemplate和spring事务管理
标签:classpath line source 环境 private 事务 管理 管理器 lap