idea 为 Idea 2017 jdk 采用1.8 maven 采用 3.5.3
<?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.wq</groupId>
<artifactId>beauty</artifactId>
<version>1.0-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.4.0.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>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
一般刚写了pom.xml会出现如下报错
其中, spring-boot-starter-web是支持web的模块, spring-boot-starter-test是支持测试的模块.
等待引用后,之后就不会报错
配置resources下面的Web资源文件,这里我就配置两个文件,一个是用来存放静态文件夹的static文件,还有一个就是用来存放HTML的资源文件夹templates。这里需要特别主要的是:static文件中一般存放css,js,image等静态资源文件,而templates文件中一般存放各种HTML文件。而且这两个文件都是默认存在的,路径不需要特别的配置就可以直接引用了。aplication.properties是个配置文件,这里面可以配置SpringBoot的相关信息。大家需要注意的是这个文件名千万不要写错,也不要放错位置,不然都不会生效的。书写springBoot入口函数和springMVC控制器测试
DemoApplication.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
}
}
HelloController.java 如果使用@RestController表示里边的方法都以json格式输出, 无需再添加额外的json配置,此时此处并没有使用。
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class HelloController {
@RequestMapping("/index")
public String index(){
return "welcome";
}
}
csstest.css
body {
padding: 0px;
margin: auto;
font-family: "黑体", "仿宋", Arial, "Arial Unicode MS", System;
background-color: #00F;
font-size: 20px;
text-align: left;
}
welcome.html
<html>
<head>
<title>Title</title>
</head>
<link href="css/csstest.css" rel="stylesheet"/>
<body>
<p>welcome page is login.........</p>
</body>
</html>
application.properties
#修改tomcat的默认的端口号,将8080改为8888
server.port=8888
在DemoApplication页面右击然后run。
注意这个运行时不是用的tomcat,而是直接用的application,(使用的是其内嵌默认的tomcat,而不是我配置的 )
看到如下日志,说明快成功了
然而,有没有看到
** WARNING ** : Your ApplicationContext is unlikely to start due to a @ComponentScan of the default package.
你不太可能成功,因为没有默认包! 新建默认包,后如下
再次启动,看到如下,则说明你的 spring boot hello world 已经成功
D:\jdk1.8\bin\java "-javaagent:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.2.6\lib\idea_rt.jar=62993:C:\Program Files\JetBrains\IntelliJ IDEA Community Edition 2017.2.6\bin" -Dfile.encoding=UTF-8 -classpath D:\jdk1.8\jre\lib\charsets.jar;D:\jdk1.8\jre\lib\deploy.jar;D:\jdk1.8\jre\lib\ext\access-bridge-64.jar;D:\jdk1.8\jre\lib\ext\cldrdata.jar;D:\jdk1.8\jre\lib\ext\dnsns.jar;D:\jdk1.8\jre\lib\ext\jaccess.jar;D:\jdk1.8\jre\lib\ext\jfxrt.jar;D:\jdk1.8\jre\lib\ext\localedata.jar;D:\jdk1.8\jre\lib\ext\nashorn.jar;D:\jdk1.8\jre\lib\ext\sunec.jar;D:\jdk1.8\jre\lib\ext\sunjce_provider.jar;D:\jdk1.8\jre\lib\ext\sunmscapi.jar;D:\jdk1.8\jre\lib\ext\sunpkcs11.jar;D:\jdk1.8\jre\lib\ext\zipfs.jar;D:\jdk1.8\jre\lib\javaws.jar;D:\jdk1.8\jre\lib\jce.jar;D:\jdk1.8\jre\lib\jfr.jar;D:\jdk1.8\jre\lib\jfxswt.jar;D:\jdk1.8\jre\lib\jsse.jar;D:\jdk1.8\jre\lib\management-agent.jar;D:\jdk1.8\jre\lib\plugin.jar;D:\jdk1.8\jre\lib\resources.jar;D:\jdk1.8\jre\lib\rt.jar;D:\Users\zhangqi975\workspace\beauty\target\classes;D:\maven\local\repo\org\springframework\boot\spring-boot-starter-web\1.4.0.RELEASE\spring-boot-starter-web-1.4.0.RELEASE.jar;D:\maven\local\repo\org\springframework\boot\spring-boot-starter\1.4.0.RELEASE\spring-boot-starter-1.4.0.RELEASE.jar;D:\maven\local\repo\org\springframework\boot\spring-boot\1.4.0.RELEASE\spring-boot-1.4.0.RELEASE.jar;D:\maven\local\repo\org\springframework\boot\spring-boot-autoconfigure\1.4.0.RELEASE\spring-boot-autoconfigure-1.4.0.RELEASE.jar;D:\maven\local\repo\org\springframework\boot\spring-boot-starter-logging\1.4.0.RELEASE\spring-boot-starter-logging-1.4.0.RELEASE.jar;D:\maven\local\repo\ch\qos\logback\logback-classic\1.1.7\logback-classic-1.1.7.jar;D:\maven\local\repo\ch\qos\logback\logback-core\1.1.7\logback-core-1.1.7.jar;D:\maven\local\repo\org\slf4j\jcl-over-slf4j\1.7.21\jcl-over-slf4j-1.7.21.jar;D:\maven\local\repo\org\slf4j\jul-to-slf4j\1.7.21\jul-to-slf4j-1.7.21.jar;D:\maven\local\repo\org\slf4j\log4j-over-slf4j\1.7.21\log4j-over-slf4j-1.7.21.jar;D:\maven\local\repo\org\yaml\snakeyaml\1.17\snakeyaml-1.17.jar;D:\maven\local\repo\org\springframework\boot\spring-boot-starter-tomcat\1.4.0.RELEASE\spring-boot-starter-tomcat-1.4.0.RELEASE.jar;D:\maven\local\repo\org\apache\tomcat\embed\tomcat-embed-core\8.5.4\tomcat-embed-core-8.5.4.jar;D:\maven\local\repo\org\apache\tomcat\embed\tomcat-embed-el\8.5.4\tomcat-embed-el-8.5.4.jar;D:\maven\local\repo\org\apache\tomcat\embed\tomcat-embed-websocket\8.5.4\tomcat-embed-websocket-8.5.4.jar;D:\maven\local\repo\org\hibernate\hibernate-validator\5.2.4.Final\hibernate-validator-5.2.4.Final.jar;D:\maven\local\repo\javax\validation\validation-api\1.1.0.Final\validation-api-1.1.0.Final.jar;D:\maven\local\repo\org\jboss\logging\jboss-logging\3.3.0.Final\jboss-logging-3.3.0.Final.jar;D:\maven\local\repo\com\fasterxml\classmate\1.3.1\classmate-1.3.1.jar;D:\maven\local\repo\com\fasterxml\jackson\core\jackson-databind\2.8.1\jackson-databind-2.8.1.jar;D:\maven\local\repo\com\fasterxml\jackson\core\jackson-annotations\2.8.1\jackson-annotations-2.8.1.jar;D:\maven\local\repo\com\fasterxml\jackson\core\jackson-core\2.8.1\jackson-core-2.8.1.jar;D:\maven\local\repo\org\springframework\spring-web\4.3.2.RELEASE\spring-web-4.3.2.RELEASE.jar;D:\maven\local\repo\org\springframework\spring-aop\4.3.2.RELEASE\spring-aop-4.3.2.RELEASE.jar;D:\maven\local\repo\org\springframework\spring-beans\4.3.2.RELEASE\spring-beans-4.3.2.RELEASE.jar;D:\maven\local\repo\org\springframework\spring-context\4.3.2.RELEASE\spring-context-4.3.2.RELEASE.jar;D:\maven\local\repo\org\springframework\spring-webmvc\4.3.2.RELEASE\spring-webmvc-4.3.2.RELEASE.jar;D:\maven\local\repo\org\springframework\spring-expression\4.3.2.RELEASE\spring-expression-4.3.2.RELEASE.jar;D:\maven\local\repo\org\slf4j\slf4j-api\1.7.21\slf4j-api-1.7.21.jar;D:\maven\local\repo\org\springframework\spring-core\4.3.2.RELEASE\spring-core-4.3.2.RELEASE.jar;D:\maven\local\repo\org\springframework\boot\spring-boot-starter-thymeleaf\1.4.0.RELEASE\spring-boot-starter-thymeleaf-1.4.0.RELEASE.jar;D:\maven\local\repo\org\thymeleaf\thymeleaf-spring4\2.1.5.RELEASE\thymeleaf-spring4-2.1.5.RELEASE.jar;D:\maven\local\repo\org\thymeleaf\thymeleaf\2.1.5.RELEASE\thymeleaf-2.1.5.RELEASE.jar;D:\maven\local\repo\ognl\ognl\3.0.8\ognl-3.0.8.jar;D:\maven\local\repo\org\javassist\javassist\3.20.0-GA\javassist-3.20.0-GA.jar;D:\maven\local\repo\org\unbescape\unbescape\1.1.0.RELEASE\unbescape-1.1.0.RELEASE.jar;D:\maven\local\repo\nz\net\ultraq\thymeleaf\thymeleaf-layout-dialect\1.4.0\thymeleaf-layout-dialect-1.4.0.jar;D:\maven\local\repo\org\codehaus\groovy\groovy\2.4.7\groovy-2.4.7.jar HelloWord.DemoApplication
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v1.4.0.RELEASE)
2018-04-11 18:11:08.824 INFO 8904 --- [ main] HelloWord.DemoApplication : Starting DemoApplication on IQSZ-L3025 with PID 8904 (D:\Users\zhangqi975\workspace\beauty\target\classes started by ZHANGQI975 in D:\Users\zhangqi975\workspace\beauty)
2018-04-11 18:11:08.828 INFO 8904 --- [ main] HelloWord.DemoApplication : No active profile set, falling back to default profiles: default
2018-04-11 18:11:09.840 INFO 8904 --- [ main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@3f197a46: startup date [Wed Apr 11 18:11:09 CST 2018]; root of context hierarchy
2018-04-11 18:11:15.126 INFO 8904 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat initialized with port(s): 8888 (http)
2018-04-11 18:11:15.155 INFO 8904 --- [ main] o.apache.catalina.core.StandardService : Starting service Tomcat
2018-04-11 18:11:15.157 INFO 8904 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.4
2018-04-11 18:11:15.431 INFO 8904 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-04-11 18:11:15.431 INFO 8904 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 5596 ms
2018-04-11 18:11:15.751 INFO 8904 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Mapping servlet: 'dispatcherServlet' to [/]
2018-04-11 18:11:15.763 INFO 8904 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-04-11 18:11:15.763 INFO 8904 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-04-11 18:11:15.764 INFO 8904 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-04-11 18:11:15.764 INFO 8904 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-04-11 18:11:16.335 INFO 8904 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@3f197a46: startup date [Wed Apr 11 18:11:09 CST 2018]; root of context hierarchy
2018-04-11 18:11:16.464 INFO 8904 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/index]}" onto public java.lang.String HelloWord.HelloController.index()
2018-04-11 18:11:16.470 INFO 8904 --- [ 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.BasicErrorController.error(javax.servlet.http.HttpServletRequest)
2018-04-11 18:11:16.470 INFO 8904 --- [ 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.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest,javax.servlet.http.HttpServletResponse)
2018-04-11 18:11:16.517 INFO 8904 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-04-11 18:11:16.517 INFO 8904 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-04-11 18:11:16.596 INFO 8904 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-04-11 18:11:17.792 INFO 8904 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-04-11 18:11:18.593 INFO 8904 --- [ main] s.b.c.e.t.TomcatEmbeddedServletContainer : Tomcat started on port(s): 8888 (http)
2018-04-11 18:11:18.600 INFO 8904 --- [ main] HelloWord.DemoApplication : Started DemoApplication in 10.957 seconds (JVM running for 12.28)
打开浏览器,输入: http://localhost:8888/index 出现
则说明成功。
为了证明spring boot 的热部署性,更改DemoApplication.java
文件
为
package HelloWord;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class DemoApplication {
public static void main(String[] args) {
SpringApplication.run(DemoApplication.class, args);
System.out.println("spring boot 启动成功!");
}
}
如果再次启动时候,没有停止,那么会报错如下
停止后,再次启动, 查看日志:
关于停止spring boot 内部的Tomcat 有两种方式
Maven 增加依赖
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-actuator</artifactId> </dependency>
配置文件application.properties配置启用shutdown的HTTP访问
#启用 shutdown endpoint的HTTP访问 endpoints.shutdown.enabled=true #不需要用户名密码验证 endpoints.shutdown.sensitive=false 此时,配置文件如下:
#修改tomcat的默认的端口号,将8080改为8888
server.port=8888
#启用shutdown endpoint的HTTP访问
endpoints.shutdown.enabled=true
#不需要用户名密码验证
endpoints.shutdown.sensitive=false
POST请求到shutdown路径 以上配置完成后,可以使用curl -X POST localhost:port/shutdown发动post请求,即可优雅的停止应用。 如果使用Linux:
curl -X POST localhost:8888/manage/shutdown
{"message":"Shutting down, bye..."}
如果使用Windows 则直接在浏览器中输入
http://localhost:8888/shutdown
但是报错,
因为 这个是以post请求有效的。 Get请求不支持 后台也同样报错
所以,这条路走不通了(暂时走不通,将来如果发现,或者聪明的你知道,请留言)
至此,spring boot 版本的Hello world 完毕!