详解SpringBean基于XML的装配

详解SpringBean基于XML的装配

1.设值注入：通过反射调用setXxx注入属性值

package com.itheima.assemble;

import java.util.List;

public class User {

private String username;

private Integer password;

private List list;

/**

* 设值注入

* 提供默认空参构造方法 ;

* 为所有属性提供setter方法。

*/

public User() {

super();

}

public void setUsername(String username) {

this.username = username;

}

public void setPassword(Integer password) {

this.password = password;

}

public void setList(List list) {

this.list = list;

}

@Override

public String toString() {

return "User [username=" + username + ", password=" + password +

", list=" + list + "]";

}

}

package com.itheima.assemble;

import org.springframework.context.ApplicationContext;

import

org.springframework.context.support.ClassPathXmlApplicationContext;

public class XmlBeanAssembleTest {

public static void main(String[] args) {

String xmlPath = "com/itheima/assemble/beans5.xml";KtsgikY

ApplicationContext applicationContext =

new ClassPathXmlApplicationContext(xmlPath);

// 构造方式输出结果

System.out.println(applicationContext.getBean("user2"));

}

}

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-4.3.xsd">

"值1"

"值2"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-4.3.xsd">

"值1"

"值2"

2.构造注入：用+其value属性注入属性值

package com.itheima.assemble;

import java.util.List;

public class User {

private String username;

private Integer passwKtsgikYord;

private List list;

/**

* 用构造注入

* 创建带所有参数的有参构造方法。

*/

public User(String username, Integer password, List list) {

super();

this.username = username;

this.password = password;

this.list = list;

}

@Override

public String toString() {

return "User [username=" + username + ", password=" + password +

", list=" + list + "]";

}

}

package com.itheima.assemble;

import org.springframework.context.ApplicationContext;

import

org.springframework.context.support.ClassPathXmlApplicationContext;

public class XmlBeanAssembleTest {

public static void main(String[] args) {

String xmlPath = "com/itheima/assemble/beans5.xml";

ApplicationContext applicationContext =

new ClassPathXmlApplicationContext(xmlPath);

// 构造方式输出结果

System.out.println(applicationContext.getBean("user1"));

}

}

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-4.3.xsd">

"值1"

"值2"

xmlns:xsi="http://w3.org/2001/XMLSchema-instance"

xsi:schemaLocation="http://springframework.org/schema/beans

http://springframework.org/schema/beans/spring-beans-4.3.xsd">

"值1"

"值2"

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