图文教程教你IDEA中的Spring环境搭建+简单入门
作者:晚风时亦鹿 时间:2022-04-13 23:14:48
首先利用IDEA创建Maven工程项目
1.选择新建项目
2.选中Maven骨架
3.填写项目名称和项目位置
4.Finsh之后默认打开的是pom.xml文件
5.在pom.xml文件下填写Spring的相关依赖(其中有一些拓宽工具依赖)
5.1完整的pom.xml代码(可直接复制)
<?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>junit</groupId>
<artifactId>junit</artifactId>
<version>4.13</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.9</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-test</artifactId>
<version>5.0.2.RELEASE</version>
</dependency>
<dependency>
<groupId>org.projectlombok</groupId>
<artifactId>lombok</artifactId>
<version>1.18.12</version>
<scope>provided</scope>
</dependency>
</dependencies>
</project>
6.完善简单项目结构和编写测试类文件
6.1简单项目结构编写
6.2在resources包下创建Spring配置文件,整合日志配置文件
6.2.1 applicationContext.xml 是Spring配置文件
applicationContext是约定俗成的叫法
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:util="http://www.springframework.org/schema/util"
xsi:schemaLocation="http://www.springframework.org/schema/beans
http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context.xsd
http://www.springframework.org/schema/util
http://www.springframework.org/schema/util/spring-util.xsd">
</beans>
6.2.2 log4j2.xml 日志配置文件
<?xml version="1.0" encoding="UTF-8"?>
<Configuration status="WARN">
<Appenders>
<Console name="Console" target="SYSTEM_OUT">
<PatternLayout pattern="%d{HH:mm:ss} %level : %msg %l%n" />
</Console>
</Appenders>
<Loggers>
<Logger name="mylog" level="error" additivity="false">
<AppenderRef ref="Console" />
</Logger>
<Root level="error">
<AppenderRef ref="Console" />
</Root>
</Loggers>
</Configuration>
6.3编写简单User类,并加上注解(可以直接复制)
**说明:这里的User类用到了 Lombok工具,具体可参照官网文档
Lombok官网:Lombok
@Data 替我们生成 getter,setter,toString等方法
@AllArgs/NoArgsConstructor分别为全参构造和无参构造
package com.xxx.demo.pojo;
import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.stereotype.Component;
@Data
@AllArgsConstructor
@NoArgsConstructor
@Component
public class User {
private String userName;
private String password;
public void add(){
System.out.println("User add.........");
}
}
6.4在config包下编写AppConfig类,并加上注解(可直接复制代码)
@ComponentScan: 全局扫描组件
其中的参数 basePackages 扫描组件的包
@Configuration: 声明当前类为JavaConfig类
@Bean: 自动装配
package com.xxx.demo.config;
import com.xxx.demo.pojo.User;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
@ComponentScan(basePackages = "com.xxx.demo")
@Configuration
public class AppConfig {
@Bean
public User user(){
return new User();
}
}
7.至此Spring简单配置完成,接下来测试
7.1简单完善test包,包名和java包下保持一直一致如图
package com.xxx.demo.pojo;
import com.xxx.demo.config.AppConfig;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.test.context.ContextConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@ContextConfiguration(classes = AppConfig.class)
public class TestUser {
@Autowired
private User user;
@Test
public void test(){
user.add();
}
}
7.3运行结果
来源:https://blog.csdn.net/m0_62491934/article/details/126197453
标签:IDEA,Spring,环境搭建,入门
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