eclipse 开发spring boot 入门级程序

冷不防 2022-05-14 06:48 196阅读 0赞

*  打开eclipse-->点击help-->点击eclipse marketplace-->点击search输入sts或者点击popular：
 *  ![70][]
 *  安装sts插件：
 *  ![70 1][]
 *  安装完成后点击file-->新建一个mave project，然后点击next：
 *  ![70 2][]
 *  到这个界面选择比较常用的maven-archetype-webapp,点击next:
 *  ![70 3][]
 *  到这个界面输入你的group ID和artifact Id:
 *  ![70 4][]
 *  然后点击finish:得到如下结构的maven项目：
 *  ![70 5][]
 *  编辑pom.xml引入springBoot:
 *      <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.zd</groupId>
          <artifactId>helloSpringBoot</artifactId>
          <packaging>war</packaging>
          <version>0.0.1-SNAPSHOT</version>
          <name>helloSpringBoot 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>
            <relativePath/> 
          </parent>
          
           <properties>
            <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
          </properties>
          
          <dependencies>
            <dependency>
              <groupId>junit</groupId>
              <artifactId>junit</artifactId>
              <version>3.8.1</version>
              <scope>test</scope>
            </dependency>
            
         
          <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
          </dependencies>
          <build>
            <finalName>helloSpringBoot</finalName>
          </build>
        </project>
    
    在src/main/java新建测试类：
 *  ![70 6][]
 *  其中app类的代码为：
    
        package com.zd.hellospringboot;
        
        import org.springframework.boot.SpringApplication;
        import org.springframework.boot.autoconfigure.SpringBootApplication;
        
        /**
         * Hello world!
         *
         */
        // 此注解指定这是一个SpringBoot的应用程序，不加就会报异常 Unable to start
        // ServletWebServerApplicationContext due to missing ServletWebServerFactory
        // bean
        @SpringBootApplication
        public class App {
        	public static void main(String[] args) {
        		// SpringApplication用于从main方法中启动Spring应用的类
        		SpringApplication.run(App.class, args);
        	}
        }
    
    这个类很重要，必须写名字随便取，这是springboot启动的入口，记住类上方要加上注解@SpringBootApplication，不然会报错
 *  controller类的代码为：
 *      package com.zd.hellospringboot;
        
        import org.springframework.beans.factory.annotation.Autowired;
        import org.springframework.web.bind.annotation.RequestMapping;
        import org.springframework.web.bind.annotation.RestController;
        
        import com.zd.hellospringboot.service.HelloSpringBootService;
        
        //RestController相当于SpringMVC中的 @Controller + @ResponseBody
        @RestController
        public class HelloController {
        
        	@Autowired
        	private HelloSpringBootService helloSpringBootService;
        
        	// 映射"/hello"请求
        	@RequestMapping("/hello")
        	public String hello() {
        		return "Hello Spring Boot!";
        	}
        
        	// 映射"/hello"请求
        	@RequestMapping("/hello2")
        	public String hello2() {
        		return "你好 spring boot!";
        	}
        
        }
    
    确认上方的工作没问题后，我们启动项目，启动方法：右键项目名称--->run as-->spring boot app,然后console控制台出现以下信息：
 *      .   ____          _            __ _ _
         /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
        ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
         \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
          '  |____| .__|_| |_|_| |_\__, | / / / /
         =========|_|==============|___/=/_/_/_/
         :: Spring Boot ::        (v2.0.0.RELEASE)
        
        2018-09-04 13:51:58.120  INFO 17272 --- [           main] com.zd.hellospringboot.App               : Starting App on zdAdmin with PID 17272 (D:\workspace\helloSpringBoot\target\classes started by zdAdmin in D:\workspace\helloSpringBoot)
        2018-09-04 13:51:58.120  INFO 17272 --- [           main] com.zd.hellospringboot.App               : No active profile set, falling back to default profiles: default
        2018-09-04 13:51:58.168  INFO 17272 --- [           main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@5ea434c8: startup date [Tue Sep 04 13:51:58 CST 2018]; root of context hierarchy
        2018-09-04 13:51:59.077  INFO 17272 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
        2018-09-04 13:51:59.099  INFO 17272 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
        2018-09-04 13:51:59.099  INFO 17272 --- [           main] org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/8.5.28
        2018-09-04 13:51:59.113  INFO 17272 --- [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_172\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:/Program Files/Java/jre1.8.0_172/bin/server;C:/Program Files/Java/jre1.8.0_172/bin;C:/Program Files/Java/jre1.8.0_172/lib/amd64;D:\app\zdAdmin\product\11.2.0\client_1\bin;F:\app\zdAdmin\product\11.2.0\client_1\bin;E:\app\zdAdmin\product\11.2.0\dbhome_1\bin;C:\Program Files (x86)\Common Files\Oracle\Java\javapath;C:\Program Files (x86)\Intel\iCLS Client\;C:\Program Files\Intel\iCLS Client\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files\Intel\Intel(R) Management Engine Components\DAL;C:\Program Files (x86)\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Intel\Intel(R) Management Engine Components\IPT;C:\Program Files\Java\jdk1.8.0_172\bin;E:\Program Files\VisualSVN Server\bin;E:\Program Files\TortoiseSVN\bin;E:\tools\apache-maven-3.5.3\bin;E:\ue;D:\app\zdAdmin\product\11.2.0\client_1\BIN;E:\app\zdAdmin\product\11.2.0\dbhome_1\BIN;C:\Users\zdAdmin\AppData\Local\Microsoft\WindowsApps;;E:\开发软件\eclipse;;.]
        2018-09-04 13:51:59.192  INFO 17272 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
        2018-09-04 13:51:59.192  INFO 17272 --- [ost-startStop-1] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1041 ms
        2018-09-04 13:51:59.293  INFO 17272 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean  : Servlet dispatcherServlet mapped to [/]
        2018-09-04 13:51:59.309  INFO 17272 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'characterEncodingFilter' to: [/*]
        2018-09-04 13:51:59.309  INFO 17272 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
        2018-09-04 13:51:59.309  INFO 17272 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'httpPutFormContentFilter' to: [/*]
        2018-09-04 13:51:59.309  INFO 17272 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean   : Mapping filter: 'requestContextFilter' to: [/*]
        2018-09-04 13:51:59.512  INFO 17272 --- [           main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@5ea434c8: startup date [Tue Sep 04 13:51:58 CST 2018]; root of context hierarchy
        2018-09-04 13:51:59.559  INFO 17272 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello]}" onto public java.lang.String com.zd.hellospringboot.HelloController.hello()
        2018-09-04 13:51:59.559  INFO 17272 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello2]}" onto public java.lang.String com.zd.hellospringboot.HelloController.hello2()
        2018-09-04 13:51:59.559  INFO 17272 --- [           main] s.w.s.m.m.a.RequestMappingHandlerMapping : Mapped "{[/hello3]}" onto public java.lang.String com.zd.hellospringboot.HelloController.hello3()
        2018-09-04 13:51:59.559  INFO 17272 --- [           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)
        2018-09-04 13:51:59.559  INFO 17272 --- [           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)
        2018-09-04 13:51:59.606  INFO 17272 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
        2018-09-04 13:51:59.606  INFO 17272 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
        2018-09-04 13:51:59.621  INFO 17272 --- [           main] o.s.w.s.handler.SimpleUrlHandlerMapping  : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
        2018-09-04 13:51:59.726  INFO 17272 --- [           main] o.s.j.e.a.AnnotationMBeanExporter        : Registering beans for JMX exposure on startup
        2018-09-04 13:51:59.773  INFO 17272 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
        2018-09-04 13:51:59.773  INFO 17272 --- [           main] com.zd.hellospringboot.App               : Started App in 1.891 seconds (JVM running for 2.525)
        2018-09-04 13:52:25.769  INFO 17272 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
        2018-09-04 13:52:25.769  INFO 17272 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
        2018-09-04 13:52:25.787  INFO 17272 --- [nio-8080-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 18 ms
    
    没有报错的话我们访问路径执行方法：
 *  ![70 7][]
 *  ![70 8][]
 *  成功执行，记得点赞哦各位大佬

[70]: /images/20220514/83ba0eebc8dc480fabd006420beb2745.png
[70 1]: /images/20220514/953a419063c34533a150165dd078f888.png
[70 2]: /images/20220514/6ed16d55a30a4c9293d8cf44a7138348.png
[70 3]: /images/20220514/fa4e3b4f3e9443f09bdd11e73336a9d3.png
[70 4]: /images/20220514/9bff142e909a455480016c987fb029f6.png
[70 5]: /images/20220514/f11ab84ae4ff4564b80b22f357bf77ba.png
[70 6]: /images/20220514/a37e8a7de7a649b0bd8ca69f13af4366.png
[70 7]: /images/20220514/c5a493b913d44fb89088c417941e0f0c.png
[70 8]: /images/20220514/e5ac47dc071d438dae404d07bb61cea0.png