1. File -->new-->maven project  建立專案。專案工程如下：

2： pom 檔案如下：

<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.zyzx.sample</groupId>   <artifactId>ch1.helloworld</artifactId>   <version>0.0.1-SNAPSHOT</version>       <parent>         <groupId>org.springframework.boot</groupId>         <artifactId>spring-boot-starter-parent</artifactId>         <version>2.0.0.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>     </dependencies>

    <build>         <plugins>             <plugin>                 <groupId>org.springframework.boot</groupId>                 <artifactId>spring-boot-maven-plugin</artifactId>             </plugin>         </plugins>     </build> </project>

3. 建立 Ch1Application

package com.zyzx.sample.ch1類

import org.springframework.boot.SpringApplication; import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication public class Ch1Application {     public static void main(String[] args) {              SpringApplication.run(Ch1Application.class, args);     }

}

4. 建立controller 類

package com.zyzx.sample.ch1.controller;

import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody;

@Controller public class HelloWorldController {          @RequestMapping("/say.html")          public @ResponseBody String say() {         return "hello spring boot!";              }

} @controller 是SpringMVC的註解，表示此類用於負責處理web的請求。

@RequestMapping 是SpringMVC的註解，表示如果請求路徑匹配，被註解的方法將被被呼叫。

@ResponseBody 表示返回的是文字，而不是檢視名稱

執行程式：.   ____          _            __ _ _  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \ ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )   '  |____| .__|_| |_|_| |_\__, | / / / /  =========|_|==============|___/=/_/_/_/  :: Spring Boot ::        (v2.0.0.RELEASE)

2018-11-03 22:26:15.049  INFO 9292 --- [           main] com.zyzx.sample.ch1.Ch1Application       : Starting Ch1Application on CC4 with PID 9292 (D:\eclipse-workspace-ee\ch1.helloworld\target\classes started by zhangbijun in D:\eclipse-workspace-ee\ch1.helloworld) 2018-11-03 22:26:15.054  INFO 9292 --- [           main] com.zyzx.sample.ch1.Ch1Application       : No active profile set, falling back to default profiles: default 2018-11-03 22:26:15.141  INFO 9292 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.ser[email protected]4c40b76e: startup date [Sat Nov 03 22:26:15 CST 2018]; root of context hierarchy 2018-11-03 22:26:16.996  INFO 9292 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http) 2018-11-03 22:26:17.035  INFO 9292 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat] 2018-11-03 22:26:17.036  INFO 9292 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.28 2018-11-03 22:26:17.051  INFO 9292 --- [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: [C:\Program Files\Java\jre1.8.0_181\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_181/bin/server;C:/Program Files/Java/jre1.8.0_181/bin;C:/Program Files/Java/jre1.8.0_181/lib/amd64;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x86;C:\Program Files (x86)\Intel\OpenCL SDK\3.0\bin\x64;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files\Java\jdk1.8.0_181\bin;C:\Program Files\Java\jdk1.8.0_181\jre\bin;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\adb;D:\spring_boot\apache-maven-3.5.4/bin;D:\nodejs\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Users\Administrator\AppData\Roaming\npm;C:\Users\Administrator\Desktop;;.] 2018-11-03 22:26:17.216  INFO 9292 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext 2018-11-03 22:26:17.216  INFO 9292 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 2078 ms 2018-11-03 22:26:17.380  INFO 9292 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/] 2018-11-03 22:26:17.385  INFO 9292 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*] 2018-11-03 22:26:17.385  INFO 9292 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*] 2018-11-03 22:26:17.385  INFO 9292 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*] 2018-11-03 22:26:17.385  INFO 9292 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*] 2018-11-03 22:26:17.786  INFO 9292 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.ser[email protected]4c40b76e: startup date [Sat Nov 03 22:26:15 CST 2018]; root of context hierarchy 2018-11-03 22:26:17.877  INFO 9292 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/say.html]}" onto public java.lang.String com.zyzx.sample.ch1.controller.HelloWorldController.say() 2018-11-03 22:26:17.886  INFO 9292 --- [           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) 2018-11-03 22:26:17.887  INFO 9292 --- [           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) 2018-11-03 22:26:17.926  INFO 9292 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2018-11-03 22:26:17.926  INFO 9292 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2018-11-03 22:26:17.970  INFO 9292 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler] 2018-11-03 22:26:18.148  INFO 9292 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup 2018-11-03 22:26:18.239  INFO 9292 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path '' 2018-11-03 22:26:18.244  INFO 9292 --- [           main] com.zyzx.sample.ch1.Ch1Application       : Started Ch1Application in 3.627 seconds (JVM running for 4.218) 2018-11-03 22:28:29.662  INFO 9292 --- [nio-8080-exec-2] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet' 2018-11-03 22:28:29.662  INFO 9292 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started 2018-11-03 22:28:29.681  INFO 9292 --- [nio-8080-exec-2] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 19 ms