Main Contents of this article
Development tool: Jetbrain Idea
Development language: Java
Development platform: Windows
Expected goal: Build a Springboot project through Idea and run it successfully.
Develop detailed steps
Create a project
Two, there are four files worth noting at this point
1. SpringbootTestApplication
package cc.xiaoming.test;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication // This annotation indicates that this is a Springboot application
public class SpringbootTestApplication {
public static void main(String[] args) { SpringApplication.run(SpringbootTestApplication.class, args); }}Copy the code2. application.properties
This is the configuration file for the current Springboot project, which currently contains nothing.
3. .gitignore
This is the ignored file for code versioning. It reads as follows:
HELP.md target/ ! .mvn/wrapper/maven-wrapper.jar ! **/src/main/**/target/ ! **/src/test/**/target/ ### STS ### .apt_generated .classpath .factorypath .project .settings .springBeans .sts4-cache ### IntelliJ IDEA ### .idea *.iws *.iml *.ipr ### NetBeans ### /nbproject/private/ /nbbuild/ /dist/ /nbdist/ /.nb-gradle/ build/ ! **/src/main/**/build/ ! **/src/test/**/build/ ### VS Code ### .vscode/Copy the code4. pom.xml
This file records information about the current project, its dependency configuration, and plug-in configuration.
<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<! -- Parent dependencies for the current Springboot project -->
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.5.3</version>
<relativePath/> <! -- lookup parent from repository -->
</parent>
<! -- A note on the project -->
<groupId>cc.xiaoming</groupId>
<artifactId>SpringbootTest</artifactId>
<version>1.0.0</version>
<name>SpringbootTest</name>
<description>SpringbootTest</description>
<! -- Project property configuration -->
<properties>
<java.version>1.8</java.version>
</properties>
<! -- Project dependency configuration -->
<dependencies>
<! -- Springboot Web Project startup dependencies -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<! -- Test dependencies for Springboot project -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<! -- Compile and package the Springboot project plug-in -->
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
Copy the codeAdd an execution class
In SpringbootTestApplication. Java directory at the new controller packages, then create HelloController classes in it.
Edit the contents of the HelloController class:
package cc.xiaoming.test.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
@RestController
@RequestMapping("/system")
public class HelloController {
@RequestMapping("/hello")
public String hello(a) {
return "Hello, Springboot."; }}Copy the code4. Click Run
. ____ _ __ _ _ / \ \ / ___ '_ __ _ _) (_ _ __ __ _ \ \ \ \ (\ ___ () |' _ | '_ | |' _ \ / _ ` | \ \ \ \ \ \ / ___) | | _) | | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v2.5.2)
2021-08-02 20:49:08.973 INFO 4036 --- [ main] c.x.test.SpringbootTestApplication : Starting SpringbootTestApplication using Java 1.8.0_201 on Sneaky-PC with PID 4036 (E:\SneakyProjects\SpringbootTest\target\classes started by Sneaky in E:\SneakyProjects\SpringbootTest)
2021-08-02 20:49:08.984 INFO 4036 --- [ main] c.x.test.SpringbootTestApplication : No active profile set, falling back to default profiles: default
2021-08-02 20:49:09.598 INFO 4036 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2021-08-02 20:49:09.612 INFO 4036 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2021-08-02 20:49:09.613 INFO 4036 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet engine: [Apache Tomcat/9.0.48]
2021-08-02 20:49:09.614 INFO 4036 --- [ main] o.a.catalina.core.AprLifecycleListener : An older version [1.2.25] of the Apache Tomcat Native library is installed, while Tomcat recommends a minimum version of [1.2.30]
2021-08-02 20:49:09.614 INFO 4036 --- [ main] o.a.catalina.core.AprLifecycleListener : Loaded Apache Tomcat Native library [1.2.25] using APR version [1.7.0].
2021-08-02 20:49:09.614 INFO 4036 --- [ main] o.a.catalina.core.AprLifecycleListener : APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true], UDS [false].
2021-08-02 20:49:09.614 INFO 4036 --- [ main] o.a.catalina.core.AprLifecycleListener : APR/OpenSSL configuration: useAprConnector [false], useOpenSSL [true]
2021-08-02 20:49:09.660 INFO 4036 --- [ main] o.a.catalina.core.AprLifecycleListener : OpenSSL successfully initialized [OpenSSL 1.1.1g 21 Apr 2020]
2021-08-02 20:49:09.718 INFO 4036 --- [ main] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2021-08-02 20:49:09.718 INFO 4036 --- [ main] w.s.c.ServletWebServerApplicationContext : Root WebApplicationContext: initialization completed in 694 ms
2021-08-02 20:49:09.936 INFO 4036 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path' '2021-08-02 20:49:09.956 INFO 4036 --- [ main] c.x.test.SpringbootTestApplication : Started SpringbootTestApplication in 1.665 seconds (JVM running for 3.162)
2021-08-02 20:49:31.135 INFO 4036 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring DispatcherServlet 'dispatcherServlet'
2021-08-02 20:49:31.136 INFO 4036 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Initializing Servlet 'dispatcherServlet'
2021-08-02 20:49:31.136 INFO 4036 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet : Completed initialization in 0 ms
Copy the codeFive, view the operation effect
Can enter in the browser address bar or the postman localhost: 8080 / system/hello.
Afterword.
Originally in the above should be over, but I personally don’t like the SRC directory on project directly to the root directory, but will SpringbootTestApplication. Java on a child in the module.
Create a submodule
Second, the project structure at this time
The pom.xml content in the submodule
<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>
<parent>
<artifactId>SpringbootTest</artifactId>
<groupId>cc.xiaoming</groupId>
<version>1.0.0</version>
</parent>
<artifactId>springboot-system</artifactId>
<version>1.0.0</version>
<properties>
<maven.compiler.source>8</maven.compiler.source>
<maven.compiler.target>8</maven.compiler.target>
</properties>
</project>
Copy the codeThe pom. XML content in the project root directory has changed
<! -- A note on the project -->
<groupId>cc.xiaoming</groupId>
<artifactId>SpringbootTest</artifactId>
<version>1.0.0</version>
<name>SpringbootTest</name>
<description>SpringbootTest</description>
<packaging>pom</packaging>
<modules>
<module>springboot-system</module>
</modules>
Copy the codeV. Take this submodule as the main functional module of the project
Will SpringbootTestApplication. Java moved to this module, delete the root directory of the SRC directory.
Vi. Successful operation
Need to add the function words in SpringbootTestApplication. Java directory at the same level of the new package, and then create all kinds of function class.