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";
		ApplicationContext applicationContext = 
						new ClassPathXmlApplicationContext(xmlPath);
		// 构造方式输出结果
		System.out.println(applicationContext.getBean("user2"));
	}
}

 	
	
	
		
		
		
		
			
				"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 password;
	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"));
	}
}

 	
	
	
		
		 
		  
			
				"值1"
				"值2"
			
		
	

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