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: