搭建一个Spring框架

迈不过友情╰ 2023-10-06 21:52 6阅读 0赞

**目录**

1. Spring框架的概述

2.搭建Spring框架

pom.xml配置

Demo.java

applicationContext.xml

DemoTest.java

--------------------

### 1. Spring框架的概述 ###

> IOC:控制反转，将创建对象的过程交给spring进行管理
> 
> AOP:面向切面，在不修改源代码的情况之下进行代码功能的增强

ssm框架是由mybatis，Spring，SpringMVC组成

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_20_color_FFFFFF_t_70_g_se_x_16][]

### 2.搭建Spring框架 ###

创建maven工程，导入坐标依赖

#### pom.xml配置 ####

<?xml version="1.0" encoding="UTF-8"?>
    <project xmlns="http://maven.apache.org/POM/4.0.0"
             xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
             xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
        <modelVersion>4.0.0</modelVersion>
    
        <groupId>org.example</groupId>
        <artifactId>Spring_demo</artifactId>
        <version>1.0-SNAPSHOT</version>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework</groupId>
                <artifactId>spring-context</artifactId>
                <version>5.0.2.RELEASE</version>
            </dependency>
            <dependency>
                <groupId>commons-logging</groupId>
                <artifactId>commons-logging</artifactId>
                <version>1.2</version>
            </dependency>
            <dependency>
                <groupId>log4j</groupId>
                <artifactId>log4j</artifactId>
                <version>1.2.12</version>
            </dependency>
            <dependency>
                <groupId>junit</groupId>
                <artifactId>junit</artifactId>
                <version>4.12</version>
                <scope>test</scope>
            </dependency>
        </dependencies>
    
    </project>

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_12_color_FFFFFF_t_70_g_se_x_16][]

**编写demo，编写具体的实现方法**

#### **Demo.java** ####

package com.qcby;
    
    import org.springframework.context.ApplicationContext;
    
    public class Demo {
        public void run(){
            System.out.println("hello Spring");
        }
    
    }

#### applicationContext.xml ####

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_20_color_FFFFFF_t_70_g_se_x_16 1][]

<?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="demo" class="com.qcby.service.Demo" />
    </beans>

**编写测试方法。**

#### DemoTest.java ####

import com.qcby.Demo;
    import org.junit.Test;
    import org.springframework.context.ApplicationContext;
    import org.springframework.context.support.ClassPathXmlApplicationContext;
    
    public class DemoTest {
        @Test
        public void testDemo(){
            Demo userService = new Demo();
            userService.run();
            //创建spring工厂
    
        }
        @Test
        public void run1(){
            //创建spring工厂，加载配置文件
            ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
            //获取bean对象
            Demo us = (Demo) ac.getBean("demo");
            //调用方法
            us.run();
        }
    
    }

**输出**

![watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_20_color_FFFFFF_t_70_g_se_x_16 2][]

[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_20_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/569ffa3928804af59cac1c9c278c0409.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5Y-r5oiR6ICB5Lyv,size_20,color_FFFFFF,t_70,g_se,x_16
[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_12_color_FFFFFF_t_70_g_se_x_16]: https://img-blog.csdnimg.cn/335f938e40124c5fbe34a2804b90e415.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5Y-r5oiR6ICB5Lyv,size_12,color_FFFFFF,t_70,g_se,x_16
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[watermark_type_d3F5LXplbmhlaQ_shadow_50_text_Q1NETiBA5Y-r5oiR6ICB5Lyv_size_20_color_FFFFFF_t_70_g_se_x_16 2]: https://img-blog.csdnimg.cn/d74354a09641420790f9c8df884049ab.png?x-oss-process=image/watermark,type_d3F5LXplbmhlaQ,shadow_50,text_Q1NETiBA5Y-r5oiR6ICB5Lyv,size_20,color_FFFFFF,t_70,g_se,x_16