如题:
要创建的Bean类UserServiceImpl02 :
package com.itheima.service.impl;
import com.itheima.dao.interfaces.InterfaceUserDao;
import com.itheima.service.interfaces.InterfaceUserService;
/**
* @copyright 2003-2024
* @author qiao wei
* @date 2024-12-23
* @version 1.0
* @brief
* @history name
* date
* brief
*/
public class UserServiceImpl02 implements InterfaceUserService {
public UserServiceImpl02(InterfaceUserDao paramUserDao, double paramValue) {
this.userDao = paramUserDao;
this.value01 = paramValue;
// paramUserDao.print();
// System.out.println("类UserServiceImpl02调用有参构造函数。---" + userDaoABC);
// System.out.println(value01);
}
@Override
public void show() {
System.out.println("类UserServiceImpl02的show方法。");
System.out.println("打印字段数据。userDao:" + userDao + ",value01:" + value01);
System.out.println(userDaoABC);
}
@Override
public void setUserDao001(InterfaceUserDao userDao) {
// System.out.println("调用属性设置方法。");
this.userDaoABC = userDao;
}
private InterfaceUserDao userDao;
private InterfaceUserDao userDaoABC;
private double value01;
}
InterfaceUserService接口:
package com.itheima.service.interfaces;
import com.itheima.dao.interfaces.InterfaceUserDao;
/**
* @copyright 2003-2024
* @author qiao wei
* @date 2024-12-22
* @version 1.0
* @brief
* @history name
* date
* brief
*/
public interface InterfaceUserService {
void show();
void setUserDao001(InterfaceUserDao userDao);
}
类中的字段类UserDaoImpl :
package com.itheima.dao.impl;
import com.itheima.dao.interfaces.InterfaceUserDao;
/**
* @copyright 2003-2025
* @author qiao wei
* @date 2025-03-24
* @version 1.0
* @brief
* @history name
* date
* brief
*/
public class UserDaoImpl implements InterfaceUserDao {
public UserDaoImpl() {
}
@Override
public void print() {
System.out.println("UserDaoImpl类实例,继承接口InterfaceUserDao");
}
}
字段实现的接口InterfaceUserDao :
package com.itheima.dao.interfaces;
/**
* @copyright 2003-2024
* @author qiao wei
* @date 2024-12-22
* @version 1.0
* @brief
* @history name
* date
* brief
*/
public interface InterfaceUserDao {
void print();
}
类结构:
userServiceImpl02.xml配置文件:
<?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:p="http://www.springframework.org/schema/p"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-4.0.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-4.0.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-4.0.xsd">
<bean id="serviceImpl02"
class="com.itheima.service.impl.UserServiceImpl02">
<!-- 构造方法参数 -->
<constructor-arg name="paramUserDao"
ref="userDao"
>
</constructor-arg>
<constructor-arg name="paramValue"
value="100.0"
>
</constructor-arg>
<!-- setUserDao001方法参数 -->
<property name="userDao001"
ref="userDao"
>
</property>
</bean>
<bean id="userDao"
class="com.itheima.dao.impl.UserDaoImpl"
>
</bean>
</beans>
测试类UserServiceImpl02Test:
package com.itheima.service.impl;
import org.junit.jupiter.api.Test;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.itheima.service.interfaces.InterfaceUserService;
import static org.junit.jupiter.api.Assertions.*;
/**
* @copyright 2003-2025
* @author qiao wei
* @date 2025-04-02
* @version 1.0
* @brief
* @history name
* date
* brief
*/
class UserServiceImpl02Test {
@Test
public void test02() {
ClassPathXmlApplicationContext applicationContext =
new ClassPathXmlApplicationContext("./xml/service/userServiceImpl02.xml");
InterfaceUserService userService =
(InterfaceUserService) applicationContext.getBean("serviceImpl02");
userService.show();
}
}
运行结果:
类UserServiceImpl02的show方法。
打印字段数据。userDao:com.itheima.dao.impl.UserDaoImpl@24105dc5,value01:100.0
com.itheima.dao.impl.UserDaoImpl@24105dc5
可见,构造方法,set方法均在创建Bean时根据配置调用。