spring framework Annotation(注解)

Posted 2020-06-09

spring  framework （4.2.4）Annotation(注解)
1、建立java项目

所用JAR
commons-logging-1.1.3.jar
spring-aop-4.2.4.RELEASE.jar
spring-beans-4.2.4.RELEASE.jar
spring-context-4.2.4.RELEASE.jar
spring-core-4.2.4.RELEASE.jar
spring-expression-4.2.4.RELEASE.jar


2、创建bean.xml放在项目src目录下

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans 
 3 xmlns="http://www.springframework.org/schema/beans" 
 4 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
 5 xmlns:context="http://www.springframework.org/schema/context" <!-- 需手动添加 -->
 6 xsi:schemaLocation="http://www.springframework.org/schema/beans
 7 http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
 8 http://www.springframework.org/schema/context    <!-- 需手动添加 -->
 9 http://www.springframework.org/schema/context/spring-context-3.0.xsd" <!-- 需手动添加 -->
10 >    
11 <!-- 配置扫描说有的com下所有的包以及子包 -->
12 <context:component-scan base-package="com"/>
13 </beans>

 

2、建立JAVA实体类

Student类

 1 package com.entity;
 2 
 3 import javax.annotation.Resource;
 4 
 5 import org.springframework.beans.factory.annotation.Value;
 6 import org.springframework.stereotype.Component;
 7 
 8 @Component("student")
 9 public class Student {
10 @Value("20160125")
11 private int id;
12 @Value("张三")
13 private String name;
14 @Resource(name="myDate")
15 private MyDate date;
16 public int getId() {
17 return id;
18 }
19 public void setId(int id) {
20 this.id = id;
21 }
22 public String getName() {
23 return name;
24 }
25 public void setName(String name) {
26 this.name = name;
27 }
28 public MyDate getDate() {
29 return date;
30 }
31 public void setDate(MyDate date) {
32 this.date = date;
33 }
34 
35 @PostConstruct//初始化方法
36 //@PreDestory销毁
37 public void abc() {
38 System.out.println("abc()");
39 }
40 
41 }

 

MyDate类

 1 package com.entity;
 2 
 3 import java.util.Date;
 4 
 5 import org.springframework.stereotype.Service;
 6 
 7 //@Component
 8 @Service
 9 public class MyDate extends Date {
10 
11 }

 

3、Test类

 1 package com.tese;
 2 
 3 import org.springframework.context.ApplicationContext;
 4 import org.springframework.context.support.ClassPathXmlApplicationContext;
 5 import com.entity.Student;
 6 
 7 public class Test {
 8 public static void main(String[] args) {
 9 ApplicationContext ctx = new ClassPathXmlApplicationContext("bean.xml");
10 
11 Student stu = (Student)ctx.getBean("student");
12 System.out.println(stu.getId());
13 System.out.println(stu.getName());
14 System.out.println(stu.getDate());
15 }
16 }

 

运行结果：
20160125
张三
Mon Jan 25 14:34:07 CST 2016