Spring Test---DAO 篇

在用Spring框架开发过程中，会定义一些bean。有些bean之间有依赖关系。

单元测试(Unit Test)需要构造被测试的对象，有些可以通过简单的new运算符生成一个实例。对于比较复杂的对象，比如DAO，有一些依赖关系，构造起来比较麻烦。这时可以通过Spring Test Framework的annotation机制来处理这些复杂的对象。

假设文件路径如下：

<Project>/src/com/example/dao

<Project>/test/com/example/dao

package com.example.dao


@ContextConfiguration(
        locations={"classpath:MyDAOTest-context.xml",
                "classpath:other-context-config.xml"
                
        }
        )
public class MyDAOTest extends AbstractJUnit4SpringContextTests {

//    @Resource(name="myDao")
    @Autowired
    private MyDAO myDao;


	@Before
	public void setUp() throws Exception {
	}

	@After
	public void tearDown() throws Exception {
	}
	
	
	
	@Test
	public void testSave() {
	    
	    MyBean entity = new MyBean();
	    //set attributes
	    
	    
	    myDao.saveOrUpdate(entity);
	    
	    Assert.isTrue(true);
	}

}

put MyDAOTest-context.xml, other-context-config.xml under folder <Project>/test

------------------------------MyDAOTest-context.xml-------------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<!--<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">-->

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd 
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd 
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

    
    <bean id="myDao" class="com.example.dao.MyDAOImpl">
        <property name="sessionFactory" ref="amSessionFactory"/>
    </bean>
 
 
 	<bean id="amSessionFactory" parent="sessionFactory"
    	class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<!--   		<property name="packagesToScan"> -->
<!-- 	        <list> -->
<!-- 	            <value>com.example.model</value> -->
<!-- 	        </list> -->
<!-- 	    </property>	   -->
		<property name="packagesToScan" value="com.example.model" />
 	</bean>

</beans>

-------------------------------------------------other-context-config.xm-------------------------------------------------

<?xml version="1.0" encoding="UTF-8"?>
<!--<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd">-->

<beans xmlns="http://www.springframework.org/schema/beans"
    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xmlns:jee="http://www.springframework.org/schema/jee"
    xmlns:tx="http://www.springframework.org/schema/tx"
    xmlns:aop="http://www.springframework.org/schema/aop"
    xsi:schemaLocation="
    http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd 
    http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee-2.5.xsd 
    http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd 
    http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">

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

    <bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
        <property name="driverClassName" value="${oracle.jdbc.driver_class}"/>
        <property name="url" value="${oracle.jdbc.url}"/>
        <property name="username" value="${oracle.jdbc.username}"/>
        <property name="password" value="${oracle.jdbc.password}"/>
	</bean>
	
    <bean id="entityInterceptor"
          class="com.mercury.itg.core.persistency.HibernateITGInterceptor"/>


    <bean id="sessionFactory"
          class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
      
		<property name="configurationClass">
			<value>org.hibernate.cfg.AnnotationConfiguration</value>
		</property>
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
        <property name="hibernateProperties">
            <ref bean="hibernateProperties"/>
        </property>
        <property name="entityInterceptor">
            <ref local="entityInterceptor"/>
        </property>
    </bean>

    <bean id="hibernateProperties"
          class="org.springframework.beans.factory.config.PropertiesFactoryBean">
        <property name="properties">
            <props>
                <prop key="hibernate.dialect">
                    org.hibernate.dialect.Oracle9Dialect
                </prop>
                <prop key="hibernate.show_sql">false</prop>
                <prop key="hibernate.c3p0.minPoolSize">5</prop>
                <prop key="hibernate.c3p0.maxPoolSize">20</prop>
                <prop key="hibernate.c3p0.timeout">600</prop>
                <prop key="hibernate.c3p0.max_statement">50</prop>
                <prop key="hibernate.c3p0.testConnectionOnCheckout">
                    false
                </prop>
            </props>
        </property>
    </bean>

    <bean id="hibernateTemplate"
          class="org.springframework.orm.hibernate3.HibernateTemplate">
        <property name="sessionFactory">
            <ref local="sessionFactory"/>
        </property>
    </bean>

    <bean id="transactionManager"
          class="org.springframework.orm.hibernate3.HibernateTransactionManager">
        <property name="sessionFactory">
            <ref local="sessionFactory"/>
        </property>
    </bean>
    
    <bean id="transactionTemplate"
      class="org.springframework.transaction.support.TransactionTemplate">
      <property name="transactionManager">
			<ref bean="transactionManager" />
		</property>

	</bean>

    <tx:annotation-driven/>
</beans>

 --------------------------------------database.properties-------------------------------------------

oracle.jdbc.driver_class=oracle.jdbc.driver.OracleDriver
oracle.jdbc.url=jdbc:oracle:thin:@localhost:1521:MySID
oracle.jdbc.username=username
oracle.jdbc.password=password
oracle.jdbc.schema=MySchema

oracle.jdbc.system.username=system
oracle.jdbc.system.password=Admin2012
oracle.jdbc.sys.username=sys
oracle.jdbc.sys.password=Admin2012

@ContextConfiguration 究竟做了什么呢？可以通过下面这段代码来解释。

public class MyDAOTest {
    
    protected static ApplicationContext ac = null; 
    static{
        ac = new ClassPathXmlApplicationContext(new String[]{"MyDAOTest-context.xml","other-context-config.xml"});
    }

    protected MyDAO myDao;


	@Before
	public void setUp() throws Exception {
	    myDao = (MappingDAO)ac.getBean("myDao");
	}

	@After
	public void tearDown() throws Exception {
	}
	
	
	@Test
	public void testSave() {
         ...
        }