[Spring] IOC - study

Spring IOC简单注入例子，本例子使用JUnit进行测试。Spring版本：3.2

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项目结构:

Spring所需引用的JAR包：

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Spring XML配置：

springContext.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">

    <import resource="dao.xml"/>

    <import resource="service.xml"/>

</beans>

dao.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">

    <bean name="accountDaoFactory" class="com.my.dao.AccountFactory" abstract="true"></bean>

    <bean name="accountDAO" class="com.my.dao.mysql.AccountDAO" parent="accountDaoFactory"></bean>

</beans>

service.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">

    <bean name="accountServiceFactory" class="com.my.service.AccountServiceFactory" abstract="true"></bean>

    <bean name="accountService" class="com.my.service.mysql.AccountService" parent="accountServiceFactory">

        <property name="account" ref="accountDAO"></property>

    </bean>

</beans>

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DAO的java class:

package com.my.dao;



public abstract class AccountFactory {

    /*

     * Fin account by id

     */

    public abstract Integer findAccount(Integer accountID);

}

package com.my.dao.mysql;



public class AccountDAO extends com.my.dao.AccountFactory {

    /*

     * Find account by account id

     */

    @Override

    public Integer findAccount(Integer accountID) {

        return accountID;

    }

}

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Service的java class:

package com.my.service;



public abstract class AccountServiceFactory {

    protected com.my.dao.AccountFactory account;



    public com.my.dao.AccountFactory getAccount() {

        return account;

    }



    public void setAccount(com.my.dao.AccountFactory account) {

        this.account = account;

    }

    

    /*

     * Find account by id

     */

    public abstract Integer finAccount(Integer accountID);

}

package com.my.service.mysql;



public class AccountService extends com.my.service.AccountServiceFactory {

    @Override

    public Integer finAccount(Integer accountID) {

        return account.findAccount(accountID);

    }

}

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测试类：

package com.my.test;



import org.springframework.context.ApplicationContext;

import org.springframework.context.support.ClassPathXmlApplicationContext;



import com.my.service.AccountServiceFactory;



public class SpringTest {

    private ApplicationContext context = new ClassPathXmlApplicationContext("springContext.xml");

    

    public SpringTest(){

    }

    

    public Integer findAccount(Integer accountID){

        AccountServiceFactory account = (AccountServiceFactory)context.getBean("accountService");

        Integer id = account.finAccount(100);

        return id;

    }

}

JUnit测试：

package com.my.test;



import static org.junit.Assert.*;



import org.junit.Before;

import org.junit.Test;



public class SpringTestTest {



    private SpringTest sp = new SpringTest();



    @Before

    public void setUp() throws Exception {

    }



    @Test

    public void testFindAccount() {

        Integer accountID = 100;

        Integer result = sp.findAccount(accountID);

        assertEquals((Integer)100, result);

        System.out.println(result);

    }

}

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运行JUnit测试结果：