java之spring之helloword

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

posted @ 2019-07-23 23:40  Vincent-yuan  阅读(258)  评论(0编辑  收藏  举报