This article introduces the process of IntelliJ IDEA (Version 2017.3.3) to create a Spring Boot project.
1 To create a new project, click Create New Project on the IntelliJ IDEA welcome interface
2 Select Spring Initializr in the New Project window, set the Project SDK, select the default Spring Initializr service address (Spring Boot official address: https://start.spring.io ), click Next
3 Enter Project Metadata related information, note that capital letters cannot be entered in Artifact, click Next
4 Select the dependencies that need to be added, here only select Web, click Next
5 Enter Project Name and Project Location, don’t care about the content in More Settings for now, click Finish
6 Directory structure automatically generated by IDEA
7 Use Maven to manage dependencies and automatically generate the content of the POM file
<?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>learn.idea</groupId>
<artifactId>idea_spring_boot</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>idea_spring_boot</name>
<description>Demo project for Spring Boot</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.1.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>1.8</java.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
8 The application.properties generated under the src/main/resource directory is the configuration file of Spring Boot (it can also be modified to .yml format). This file has nothing to initialize and needs to be configured by the developer. The configuration of Spring Boot is not discussed in this article Within range.
9 IdeaSpringBootApplication.java contains the application entry, the content is as follows
package learn.idea;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class IdeaSpringBootApplication {
public static void main(String[] args) {
SpringApplication.run(IdeaSpringBootApplication.class, args);
}
}
10 Customize a Controller to handle HTTP requests on the homepage (Spring MVC knowledge)
package learn.idea.controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;
@RestController
public class IndexController {
@RequestMapping(value = "/", method = RequestMethod.GET)
public String index() {
return "这是 Spring Boot Web 首页";
}
}
11 Run the main method in IdeaSpringBootApplication to start the project. It can be seen from the startup log that Spring Boot Web uses the embedded Tomcat server
/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/bin/java -XX:TieredStopAtLevel=1 -noverify -Dspring.output.ansi.enabled=always -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote.port=49701 -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.ssl=false -Djava.rmi.server.hostname=127.0.0.1 -Dspring.liveBeansView.mbeanDomain -Dspring.application.admin.enabled=true "-javaagent:/Applications/IntelliJ IDEA.app/Contents/lib/idea_rt.jar=49703:/Applications/IntelliJ IDEA.app/Contents/bin" -Dfile.encoding=UTF-8 -classpath /Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/charsets.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/deploy.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/cldrdata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/dnsns.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/jaccess.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/jfxrt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/localedata.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/nashorn.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/sunec.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/sunjce_provider.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/sunpkcs11.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/ext/zipfs.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/javaws.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/jce.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/jfr.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/jfxswt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/jsse.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/management-agent.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/plugin.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/resources.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/jre/lib/rt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/ant-javafx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/dt.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/javafx-mx.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/jconsole.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/packager.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/sa-jdi.jar:/Library/Java/JavaVirtualMachines/jdk1.8.0_161.jdk/Contents/Home/lib/tools.jar:/Users/jiyongliang/Dev/Project/idea_spring_boot/target/classes:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot-starter-web/2.0.1.RELEASE/spring-boot-starter-web-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot-starter/2.0.1.RELEASE/spring-boot-starter-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot/2.0.1.RELEASE/spring-boot-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot-autoconfigure/2.0.1.RELEASE/spring-boot-autoconfigure-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot-starter-logging/2.0.1.RELEASE/spring-boot-starter-logging-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/ch/qos/logback/logback-core/1.2.3/logback-core-1.2.3.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/apache/logging/log4j/log4j-to-slf4j/2.10.0/log4j-to-slf4j-2.10.0.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/apache/logging/log4j/log4j-api/2.10.0/log4j-api-2.10.0.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/slf4j/jul-to-slf4j/1.7.25/jul-to-slf4j-1.7.25.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/javax/annotation/javax.annotation-api/1.3.2/javax.annotation-api-1.3.2.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/yaml/snakeyaml/1.19/snakeyaml-1.19.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot-starter-json/2.0.1.RELEASE/spring-boot-starter-json-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/jackson/core/jackson-databind/2.9.5/jackson-databind-2.9.5.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/jackson/core/jackson-annotations/2.9.0/jackson-annotations-2.9.0.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/jackson/core/jackson-core/2.9.5/jackson-core-2.9.5.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/jackson/datatype/jackson-datatype-jdk8/2.9.5/jackson-datatype-jdk8-2.9.5.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/jackson/datatype/jackson-datatype-jsr310/2.9.5/jackson-datatype-jsr310-2.9.5.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/jackson/module/jackson-module-parameter-names/2.9.5/jackson-module-parameter-names-2.9.5.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/boot/spring-boot-starter-tomcat/2.0.1.RELEASE/spring-boot-starter-tomcat-2.0.1.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/apache/tomcat/embed/tomcat-embed-core/8.5.29/tomcat-embed-core-8.5.29.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/apache/tomcat/embed/tomcat-embed-el/8.5.29/tomcat-embed-el-8.5.29.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/apache/tomcat/embed/tomcat-embed-websocket/8.5.29/tomcat-embed-websocket-8.5.29.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/hibernate/validator/hibernate-validator/6.0.9.Final/hibernate-validator-6.0.9.Final.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/javax/validation/validation-api/2.0.1.Final/validation-api-2.0.1.Final.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/jboss/logging/jboss-logging/3.3.2.Final/jboss-logging-3.3.2.Final.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/com/fasterxml/classmate/1.3.4/classmate-1.3.4.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-web/5.0.5.RELEASE/spring-web-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-beans/5.0.5.RELEASE/spring-beans-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-webmvc/5.0.5.RELEASE/spring-webmvc-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-aop/5.0.5.RELEASE/spring-aop-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-context/5.0.5.RELEASE/spring-context-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-expression/5.0.5.RELEASE/spring-expression-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/slf4j/slf4j-api/1.7.25/slf4j-api-1.7.25.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-core/5.0.5.RELEASE/spring-core-5.0.5.RELEASE.jar:/Users/jiyongliang/Dev/Workbench/Maven/repo/org/springframework/spring-jcl/5.0.5.RELEASE/spring-jcl-5.0.5.RELEASE.jar learn.idea.IdeaSpringBootApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.1.RELEASE)
2018-04-18 20:45:09.878 INFO 695 --- [ main] learn.idea.IdeaSpringBootApplication : Starting IdeaSpringBootApplication on jiyongliangdeiMac.local with PID 695 (/Users/jiyongliang/Dev/Project/idea_spring_boot/target/classes started by jiyongliang in /Users/jiyongliang/Dev/Project/idea_spring_boot)
2018-04-18 20:45:09.881 INFO 695 --- [ main] learn.idea.IdeaSpringBootApplication : No active profile set, falling back to default profiles: default
2018-04-18 20:45:11.146 INFO 695 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@78dd667e: startup date [Wed Apr 18 20:45:11 CST 2018]; root of context hierarchy
2018-04-18 20:45:14.005 INFO 695 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-04-18 20:45:14.061 INFO 695 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-04-18 20:45:14.061 INFO 695 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.29
2018-04-18 20:45:14.072 INFO 695 --- [ost-startStop-1] o.a.catalina.core.AprLifecycleListener : The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: [/Users/jiyongliang/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.]
2018-04-18 20:45:14.269 INFO 695 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-04-18 20:45:14.270 INFO 695 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 3169 ms
2018-04-18 20:45:14.433 INFO 695 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-04-18 20:45:14.436 INFO 695 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-04-18 20:45:14.437 INFO 695 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-04-18 20:45:14.437 INFO 695 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-04-18 20:45:14.437 INFO 695 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-04-18 20:45:14.631 INFO 695 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-04-18 20:45:14.964 INFO 695 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@78dd667e: startup date [Wed Apr 18 20:45:11 CST 2018]; root of context hierarchy
2018-04-18 20:45:15.030 INFO 695 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/],methods=[GET]}" onto public java.lang.String learn.idea.controller.IndexController.index()
2018-04-18 20:45:15.035 INFO 695 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error]}" onto public org.springframework.http.ResponseEntity<java.util.Map<java.lang.String, java.lang.Object>> org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-04-18 20:45:15.036 INFO 695 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.servlet.error.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-04-18 20:45:15.053 INFO 695 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-04-18 20:45:15.054 INFO 695 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-04-18 20:45:15.234 INFO 695 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-04-18 20:45:15.375 INFO 695 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2018-04-18 20:45:15.379 INFO 695 --- [ main] learn.idea.IdeaSpringBootApplication : Started IdeaSpringBootApplication in 7.995 seconds (JVM running for 13.031)
12 Open the browser and enter http://localhost:8080/