在Eclipse下新建一個Maven項目，修改pom.xm文件如下：
<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>springbootmaven01</groupId>
<artifactId>springbootmaven01</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>chapterl Maven Webapp</name>
<url>http://maven.apache.org</url>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.0.RELEASE</version>
</parent>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
<java.version>l.8</java.version>
</properties>
<dependencies>
<!-- Spring Boot Starter 依賴弓|入 -->
<!-- AOP 包 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-aop</artifactId>
</dependency>
<!-- Web開發包，將載入Spring MVC所需要的包，且內嵌tomcat -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<!--加載測試依賴包 -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<!-- 引入插件 -->
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
編寫java代碼
/**
*
*/
package com.banyuan.test01;
import java.util.HashMap;
import java.util.Map;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.EnableAutoConfiguration;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody;
/**
* @author yw 2019年10月11日 下午4:37:21
*
*/
@Controller
//啓用Spring Boot自動裝配
@EnableAutoConfiguration
public class Test01 {
@RequestMapping("/test")
@ResponseBody
public Map<String, String> test() {
Map<String, String> map = new HashMap<String, String>();
map.put("key", "value");
return map;
}
public static void main(String[] args) throws Exception {
SpringApplication.run(Test01.class, args);
}
}
運行上面代碼就可以了。因爲我本機已經有tomcat啓動佔用了8080端口，所以修改spring boot啓動的tomcat端口。
在resource目錄下，新建application.properties文件，裏面添加如下內容：
server.port=8989
運行代碼，效果如下
. ____ _ __ _ _
/\\ / ___'_ __ _ _(_)_ __ __ _ \ \ \ \
( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
\\/ ___)| |_)| | | | | || (_| | ) ) ) )
' |____| .__|_| |_|_| |_\__, | / / / /
=========|_|==============|___/=/_/_/_/
:: Spring Boot :: (v2.0.0.RELEASE)
2019-10-11 16:51:51.183 INFO 16934 --- [ main] com.banyuan.test01.Test01 : Starting Test01 on ywdeMacBook-Air.local with PID 16934 (/Users/yw/eclipse-workspace2/springbootmaven01/target/classes started by yw in /Users/yw/eclipse-workspace2/springbootmaven01)
2019-10-11 16:51:51.186 INFO 16934 --- [ main] com.banyuan.test01.Test01 : No active profile set, falling back to default profiles: default
2019-10-11 16:51:51.311 INFO 16934 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@35d019a3: startup date [Fri Oct 11 16:51:51 CST 2019]; root of context hierarchy
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by org.springframework.cglib.core.ReflectUtils$1 (file:/Users/yw/.m2/repository/org/springframework/spring-core/5.0.4.RELEASE/spring-core-5.0.4.RELEASE.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int,java.security.ProtectionDomain)
WARNING: Please consider reporting this to the maintainers of org.springframework.cglib.core.ReflectUtils$1
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
2019-10-11 16:51:53.792 INFO 16934 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8989 (http)
2019-10-11 16:51:53.863 INFO 16934 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2019-10-11 16:51:53.865 INFO 16934 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.28
2019-10-11 16:51:53.889 INFO 16934 --- [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/yw/Library/Java/Extensions:/Library/Java/Extensions:/Network/Library/Java/Extensions:/System/Library/Java/Extensions:/usr/lib/java:.]
2019-10-11 16:51:54.082 INFO 16934 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2019-10-11 16:51:54.083 INFO 16934 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 2793 ms
2019-10-11 16:51:54.315 INFO 16934 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2019-10-11 16:51:54.325 INFO 16934 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2019-10-11 16:51:54.326 INFO 16934 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2019-10-11 16:51:54.327 INFO 16934 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2019-10-11 16:51:54.327 INFO 16934 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2019-10-11 16:51:54.823 INFO 16934 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@35d019a3: startup date [Fri Oct 11 16:51:51 CST 2019]; root of context hierarchy
2019-10-11 16:51:54.975 INFO 16934 --- [ main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/test]}" onto public java.util.Map<java.lang.String, java.lang.String> com.banyuan.test01.Test01.test()
2019-10-11 16:51:54.985 INFO 16934 --- [ 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)
2019-10-11 16:51:54.987 INFO 16934 --- [ 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)
2019-10-11 16:51:55.040 INFO 16934 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-10-11 16:51:55.040 INFO 16934 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-10-11 16:51:55.095 INFO 16934 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2019-10-11 16:51:55.363 INFO 16934 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2019-10-11 16:51:55.430 INFO 16934 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8989 (http) with context path ''
2019-10-11 16:51:55.437 INFO 16934 --- [ main] com.banyuan.test01.Test01 : Started Test01 in 5.275 seconds (JVM running for 6.215)