Spring and Junit4 integration
@RunWith(SpringJUnit4ClassRunner.class)
Let the tests run in the Spring test environment
@ContextConfiguration When Spring integrates JUnit4 tests, use annotations to introduce multiple configuration files
single file
@ContextConfiguration(locations="../applicationContext.xml")
@ContextConfiguration(classes =SimpleConfiguration.class)
When there are multiple files, {} can be used
@ContextConfiguration(locations = {"classpath*:/spring1.xml", "classpath*:/spring2.xml" })
Annotation configuration in Xml
<context:annotation-config>: Annotation scanning is for beans that have been registered in the Spring container
<context:component-scan>: not only has all the functions of <context:annotation-config>, but also can scan the corresponding beans under the specified package
<context:component-scanbase-package="com.test"/>
When present with <context:component-scan>, the former will be ignored.
Even if the bean is registered and the <context:annotation-config /> scan is enabled at the same time, the injection annotations such as @autowire and @resource will only be injected once, that is, only loaded once.
Aop
1. Create a facet class
2、@Aspect
xml configuration scan <aop:aspectj-autoproxy></aop:aspectj-autoproxy>
3. Aspect class added (entry point and enhancement)
pre-enhancement
@Before("execution(* com.igeekhome.anli.UserDaoImpl.updateUser(..))") publicvoid updateUser() { System.out .println ( " Authorization Verification " ); } |
rear boost
// public entry point @Pointcut("execution(* com.igeekhome.anli.UserDaoImpl.*(..))") privatevoid myPointcut() {}
@AfterReturning(pointcut="myPointcut()", returning="ret") publicvoid deleteUser(Object ret) { System.out .println ( " Delete successful: ......+ return:" + ret ); } |
Surround Enhancement:
@Around("myPointcut()") public Object transactional (ProceedingJoinPoint jp) throws Throwable { System.out .println ( " Open the thing " ); Object object=jp.proceed(); System.out.println ( " Commit transaction " ); returnobject; } |
abnormal enhancement
@AfterThrowing(pointcut="myPointcut()", throwing="ret") publicObject execption(Object ret) {
System.out.println ( " Exception Enhancement " ); returnret; } |
final enhancement
@After("execution(* com.igeekhome.anli.UserDaoImpl.saveUser(..))") public void finall () {
System.out.println ( " Final Enhancement " ) ;
} |
Jdbc
1. The Dao class (the class that writes the sq statement) is succeeded by the JdbcDaoSupport class
<!-- Load property configuration file --> <context:property-placeholder location="classpath:db.properties"/> <!--配置数据源--> <bean id="dataSource" class=" com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${jdbc.className}"></property> <property name="url" value="${jdbc.url}"></property> <property name="username" value="${jdbc.username}"></property> <property name="password" value="${jdbc.password}"></property> <property name="initialSize" value="${jdbc.initialSize}"></property> <property name="maxActive" value="${jdbc.maxActive}"></property> <property name="minIdle" value="${jdbc.minIdle}"></property> </bean>
<!-- Dao实现层继承jdbcdaosupper不需要配置jdbcTemplate模板工具类--> <!--配置jdbcTemplate模板工具类 <bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"> <property name="dataSource" ref="dataSource"></property> </bean>--> <!-- Dao实现层依赖dataSource必须写--> <bean id="accountDAO" class="com.igeekhome.spring.AccountImpl"> <property name="dataSource" ref="dataSource"></property> </bean> |
2、
3、Xml配置db.properties文件和数据源
<!-- 加载属性配置文件 --> <context:property-placeholder location="classpath:db.properties"/> <!--配置数据源--> <bean id="dataSource" class=" com.alibaba.druid.pool.DruidDataSource"> <property name="driverClassName" value="${jdbc.className}"></property> <property name="url" value="${jdbc.url}"></property> <property name="username" value="${jdbc.username}"></property> <!-- <property name="password" value="${jdbc.password}"></property>--> <property name="initialSize" value="${jdbc.initialSize}"></property> <property name="maxActive" value="${jdbc.maxActive}"></property> <property name="minIdle" value="${jdbc.minIdle}"></property> </bean> |
事务
1、xml内容
<!-- 配置事务管理器 --> <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource"></property> </bean>
<!-- 开启事务注解的支持 --> <tx:annotation-driven transaction-manager="transactionManager"/> |
3、在需要事物的类或方法上写上注解
如果 @Transactional 标注在 Class 上面，那么将会对这个 Class 里面所有的 public 方法都包装事务方法。等同于该类的每个公有方法都放上了@Transactional。
如果某方法需要单独的事务定义，则需要在方法上加@Transactional来覆盖类上的标注声明。记住：方法级别的事务覆盖类级别的事务，一般我们在企业开发的时候，类上面定义的事务为只读属性（@Transactional(readOnly=true)），增删改的方法上定义的事务为可写属性（@Transactional(readOnly=false)）！查找的方法上定义的事务为可写属性（@Transactional(readOnly=true)）！