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spring-Bean依赖注入-》普通数据类型


1.创建UserDao接口以及UserDaoImpl实现类(接口代码省略)

public class UserDaoImpl implements UserDao {

private String username;
private int age;

public void setUsername(String username) {
this.username = username;
}

public void setAge(int age) {
this.age = age;
}

@Override
public void save1() {
System.out.println(username+"======="+age);
System.out.println("save running...");
}
}

2.创建UserService接口以及UserServiceImpl实现类(接口代码省略)

public class UserServiceImpl implements UserService {

private UserDao userDao;

public UserServiceImpl() {
}

public UserServiceImpl(UserDao userDao) {
this.userDao = userDao;
}

@Override
public void sava() {
userDao.save1();
}
}

3.spring配置文件applicationContext.xml的操作

<?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 id="userDao" class="com.hao.dao.impl.UserDaoImpl">
<property name="username" value="张三"/>
<property name="age" value="30"/>
</bean>
<bean id="userService" class="com.hao.service.impl.UserServiceImpl">
<constructor-arg name="userDao" ref="userDao"></constructor-arg>
</bean>
</beans>

4.测试

public class UserController {
public static void main(String[] args) {
ApplicationContext context=new ClassPathXmlApplicationContext("applicationContext.xml");
UserService service = (UserService) context.getBean("userService");
service.sava();

}
}

结果: 张三=======30
save running…


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