这篇文章主要讲 spring的基础的使用案例
项目整体目录结构:
1.新建一个java项目:spring_helloworld
2.在项目下创建一个lib文件夹,并把一些必须的jar包复制过去
新建lib文件夹
把需要的jar包复制到lib文件夹下,jar包如下:
commons-logging-1.1.1.jar
spring-beans-4.1.6.RELEASE.jar
spring-context-4.1.6.RELEASE.jar
spring-core-4.1.6.RELEASE.jar
spring-expression-4.1.6.RELEASE.jar
对lib文件夹下的jar包 build path
3.在项目spring_helloword上,右键添加 library 库
选择 Junit
Finish
效果如下图:
4.在src下添加User.java文件
User.java
package cn.vincent.vo; import java.io.Serializable; public class User implements Serializable { private String name; private int age; public String getName() { return name; } public void setName(String name) { this.name = name; } public int getAge() { return age; } public void setAge(int age) { this.age = age; } @Override public String toString() { return "User [name=" + name + ", age=" + age + "]"; } }
5.在src 下添加配置文件
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd"> <bean id="user" class="cn.vincent.vo.User"> <property name="name" value="张三疯"/> <property name="age" value="22"/> </bean> </beans>
6.在spring_helloword项目下,添加 名为test的source file,和SpringTest.java文件
package cn.vincent.spring; import org.junit.Test; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import cn.vincent.vo.User; public class SpringTest { @Test public void testHello(){ ApplicationContext ac=new ClassPathXmlApplicationContext("beans.xml"); User u=(User)ac.getBean("user"); System.out.println(u); } }
7.右键,运行单元测试
8.效果如下:
github地址:https://github.com/Vincent-yuan/spring_helloworld