IntelliJ IDEA搭建SpringBoot應用
Spring Boot是由Pivotal團隊提供的全新框架,其設計目的是用來簡化新Spring應用的初始搭建以及開發過程。該框架使用了特定的方式來進行配置,從而使開發人員不再需要定義樣板化的配置。通過這種方式,Boot致力於在蓬勃發展的快速應用開發領域(rapid application development)成為領導者。
使用spring boot有什麼好處
其實就是簡單、快速、方便!平時如果我們需要搭建一個spring web專案的時候需要怎麼做呢? 1)配置web.xml,載入spring和spring mvc 2)配置資料庫連線、配置spring事務 3)配置載入配置檔案的讀取,開啟註解 4)配置日誌檔案 ... 配置完成之後部署tomcat 除錯 ... 現在非常流行微服務,如果我這個專案僅僅只是需要傳送一個郵件,如果我的專案僅僅是生產一個積分;我都需要這樣折騰一遍! 但是如果使用spring boot呢? 很簡單,我僅僅只需要非常少的幾個配置就可以迅速方便的搭建起來一套web專案或者是構建一個微服務!
1.建立一個新專案(Create New Project)
選擇 Spring Initializr,Project SDK 選擇 1.8,URL 填寫預設的,點選 Next
2.繼續專案配置
Name:專案名稱 Type:我們是Maven構建的,那麼選擇第一個Maven Project Packaging:打包型別,打包成Jar檔案 Java Version:jdk版本,選擇1.8 Language:開發語言,選擇Java Group:對應pom檔案中的groupId,專案組織的唯一標識,對應Java包的結構 Artifact:對應pom檔案的artifactId,專案唯一標識,對應專案名稱 Version:專案版本,對應pom檔案的version Description:專案描述,對應pom檔案的description Package:包名
3.Spring Boot 版本選擇,我這裡選擇了1.5.2,只要勾選Web下的web就可以了,然後Next
4.填寫專案名稱,專案存放的目錄,點選 Finish
5.可以將下面這三個無關的檔案刪除,乾淨結構
6.最後的專案結構
這裡看一下自動生成的pom.xml檔案
<?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>com.example</groupId> <artifactId>demo</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>jar</packaging> <name>demo</name> <description>Demo project for Spring Boot</description> <parent> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-parent</artifactId> <version>1.5.2.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>
7.新建一個Controller進行測試
@RestController public class HelloController { @RequestMapping(value = "/hello") public String hello() { return "hello,Spring Boot"; } }
@RestController的意思就是controller裡面的方法都以json格式輸出,不用再寫什麼jackjson配置的了!
整個專案的啟動類就是上面的DemoApplication
@SpringBootApplication public class DemoApplication { public static void main(String[] args) { SpringApplication.run(DemoApplication.class, args); } }
8.啟動成功資訊,埠8080
. ____ _ __ _ _ /\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \ \\/ ___)| |_)| | | | | || (_| | ) ) ) ) ' |____| .__|_| |_|_| |_\__, | / / / / =========|_|==============|___/=/_/_/_/ :: Spring Boot :: (v1.5.3.RELEASE) 2017-04-24 01:29:17.293 INFO 19480 --- [ restartedMain] com.example.DemoApplication : Starting DemoApplication on DESKTOP-4U9C0CH with PID 19480 (D:\IdeaProjects\test\demo\target\classes started by winner_0715 in D:\IdeaProjects\test\demo) 2017-04-24 01:29:17.295 INFO 19480 --- [ restartedMain] com.example.DemoApplication : No active profile set, falling back to default profiles: default 2017-04-24 01:29:17.432 INFO 19480 --- [ restartedMain] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot[email protected]1f5f2168: startup date [Mon Apr 24 01:29:17 CST 2017]; root of context hierarchy 2017-04-24 01:29:21.450 INFO 19480 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8080 (http) 2017-04-24 01:29:21.493 INFO 19480 --- [ restartedMain] o.apache.catalina.core.StandardService : Starting service Tomcat 2017-04-24 01:29:21.495 INFO 19480 --- [ restartedMain] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.14 2017-04-24 01:29:21.820 INFO 19480 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext 2017-04-24 01:29:21.820 INFO 19480 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 4396 ms 2017-04-24 01:29:22.136 INFO 19480 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/] 2017-04-24 01:29:22.149 INFO 19480 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*] 2017-04-24 01:29:22.150 INFO 19480 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2017-04-24 01:29:22.150 INFO 19480 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2017-04-24 01:29:22.151 INFO 19480 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*] 2017-04-24 01:29:22.642 INFO 19480 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot[email protected]1f5f2168: startup date [Mon Apr 24 01:29:17 CST 2017]; root of context hierarchy 2017-04-24 01:29:22.785 INFO 19480 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/index]}" onto public java.util.Map<java.lang.String, java.lang.String> com.example.test.IndexController.test(java.lang.String) 2017-04-24 01:29:22.791 INFO 19480 --- [ restartedMain] 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.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2017-04-24 01:29:22.792 INFO 19480 --- [ restartedMain] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/error],produces=[text/html]}" onto public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse) 2017-04-24 01:29:22.896 INFO 19480 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-04-24 01:29:22.896 INFO 19480 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-04-24 01:29:22.963 INFO 19480 --- [ restartedMain] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2017-04-24 01:29:23.250 INFO 19480 --- [ restartedMain] o.s.b.d.a.OptionalLiveReloadServer : LiveReload server is running on port 35729 2017-04-24 01:29:23.351 INFO 19480 --- [ restartedMain] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup 2017-04-24 01:29:23.492 INFO 19480 --- [ restartedMain] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8080 (http) 2017-04-24 01:29:23.507 INFO 19480 --- [ restartedMain] com.example.DemoApplication : Started DemoApplication in 6.736 seconds (JVM running for 7.717)
9.到瀏覽器中輸入 http://localhost:8080/hello
上面講的打包方式是jar,試了一下war的打包方式,生成的目錄結構是這樣的