spring 通過property標籤給物件新增屬性入門
阿新 • • 發佈:2019-02-18
User.java
package cn.itcast.c_property; public class User { private int id; private String name; ////////////////// --> 通過容器注入屬性值 public void setId(int id) { this.id = id; } // //--> 通過容器注入屬性值 public void setName(String name) { this.name = name; } //////////////// public int getId() { return id; } public String getName() { return name; } @Override public String toString() { return "User [id=" + id + ", name=" + name + "]"; } public User() { super(); System.out.println("------User物件建立【無引數構造器】------"); } public User(int id, String name) { System.out.println("-----User物件建立【帶引數構造器】--------"); this.id = id; this.name = name; } public void init_user() { System.out.println("建立物件之後,初始化"); } public void destroy_user() { System.out.println("IOC容器銷燬,user物件回收!"); } }
bean.xml
<?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" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <!-- ###############物件屬性賦值############### --> <!-- 1) 通過set方法給屬性注入值 --> <bean id="user" class="cn.itcast.c_property.User" scope="prototype"> <property name="id" value="101"></property> <property name="name" value="Jack"></property> </bean> </beans>
App.java
public class App {
// 建立容器物件
private ApplicationContext ac = new ClassPathXmlApplicationContext("cn/itcast/c_property/bean.xml");
@Test
public void testSet() {
// 從容器中獲取
User user = (User) ac.getBean("user");
System.out.println(user);
}
}
輸出:
------User物件建立【無引數構造器】------
User [id=101, name=Jack]