Spring--最基础的示例
Spring温习(1)--最基础的示例
文章分类:Java编程
从现在开始，我将从Spring为起点，逐步复习几大框架各方面的知识，以便今后查看使用
第一各Spring示例
必须包:spring-framework-2.5.6\dist\spring.jar
spring-framework-2.5.6\lib\jakarta-commons\common-logging.jar
为了方便测试还需要：spring-framework-2.5.6\lib\junit\junit4.4.jar
第一步，先在spring资源包找到：spring-framework-2.5.6\samples\jpetstore\attributes\WEB-INF\applictionContext.xml
找到后将多余的删除，留下最基本的
Java代码
1. <span style="font-size: medium;"><?xml version="1.0" encoding="UTF-8"?>
2. <beans xmlns="http://www.springframework.org/schema/beans"
3. xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
4. xmlns:context="http://www.springframework.org/schema/context"
5. xmlns:tx="http://www.springframework.org/schema/tx"
6. xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
7. http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
8. http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
9.
10. </beans></span>
<?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:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd">
</beans>
UserDAO.java
Java代码
1. <span style="font-size: medium;">package com.test.domain;
2.
3. public interface UserDAO {
4. void say();
5. }</span><span>
6. </span>
package com.test.domain;
public interface UserDAO {
void say();
}
UserDAOImpl.java
Java代码
1. <span style="font-size: medium;">package com.test.domain;
2.
3. public class UserDAOImpl implements UserDAO {
4.
5. @Override
6. public void say() {
7. System.out.println("i can speak");
8. }
9.
10. }</span><span>
11. </span>
package com.test.domain;
public class UserDAOImpl implements UserDAO {
@Override
public void say() {
System.out.println("i can speak");
}
}
applictionContext.xml
Xml代码
1. <span style="font-size: medium;"><?xml version="1.0" encoding="UTF-8"?>
2. <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
3.
4. <beans>
5. <bean id="userDAO" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<bean id="userDAO" encoding="UTF-8"?>
2. <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
3.
4. <beans>
5. <!--Spring的实例化Bean有三种方式：-->
6. <!-- 使用类构造器直接实例化 -->
7. <bean id="userDAO" factory-method="UserDAOService" />
10. <!-- 使用实例工厂方法实例化 -->
11. <bean id="factory" />
12. <bean id="userDAO2" factory-bean="factory" factory-method="getUserDAOService" />
13. </beans>
14. </span>
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>
<!--Spring的实例化Bean有三种方式：-->
<!-- 使用类构造器直接实例化 -->
<bean id="userDAO" factory-method="UserDAOService" />
<!-- 使用实例工厂方法实例化 -->
<bean id="factory" />
<bean id="userDAO2" factory-bean="factory" factory-method="getUserDAOService" />
</beans>
BeanFactory.java
Java代码
1. <span style="font-size: medium;">package com.test.domain;
2.
3. public class BeanFactory {
4.
5. //使用静态工厂的方法实例化使用
6. public static UserDAO UserDAOService()
7. {
8. return new UserDAOImpl();
9. }
10.
11. public UserDAO getUserDAOService()
12. {
13. return new UserDAOImpl();
14. }
15.
16. }</span><span style="font-size: medium;">
17. </span>
package com.test.domain;
public class BeanFactory {
//使用静态工厂的方法实例化使用
public static UserDAO UserDAOService()
{
return new UserDAOImpl();
}
public UserDAO getUserDAOService()
{
return new UserDAOImpl();
}
}
测试类
Java代码
1. <span style="font-size: medium;">package com.test.domain;
2.
3. import org.junit.Test;
4. import org.springframework.context.ApplicationContext;
5. import org.springframework.context.support.ClassPathXmlApplicationContext;
6. import org.springframework.web.context.WebApplicationContext;
7. import org.springframework.web.context.support.WebApplicationContextUtils;
8.
9. public class MyTest {
10.
11. @Test
12. public void testUser(){
13. ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
14. UserDAO dao=(UserDAO)context.getBean("userDAO");
15. dao.say();
16. UserDAO dao2=(UserDAO)context.getBean("userDAO2");
17. dao2.say();
18. UserDAO dao3=(UserDAO)context.getBean("userDAO3");
19. dao3.say();
20. }
21.
22. }
23. </span>
package com.test.domain;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import org.springframework.web.context.WebApplicationContext;
import org.springframework.web.context.support.WebApplicationContextUtils;
public class MyTest {
@Test
public void testUser(){
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
UserDAO dao=(UserDAO)context.getBean("userDAO");
dao.say();
UserDAO dao2=(UserDAO)context.getBean("userDAO2");
dao2.say();
UserDAO dao3=(UserDAO)context.getBean("userDAO3");
dao3.say();
}
}
测试结果
i can speak
i can speak
i can speak
转自：http://javacrazyer.iteye.com/blog/794916