我正在逐步关注youtube的教程,但我没有得到结果。代码如下:
主要申请
@SpringBootApplication
public class Application {
public static void main(String[] args) throws Exception {
SpringApplication.run(Application.class, args);
}
}
模型类
public class Greeting {
private BigInteger id;
private String text;
public Greeting() {}
public BigInteger getId() {
return id;
}
public void setId(BigInteger id) {
this.id = id;
}
public String getText() {
return text;
}
public void setText(String text) {
this.text = text;
}
}
问候控制器
@RestController()
public class GreetingController {
private static BigInteger nextId;
private static Map<BigInteger, Greeting> greetingMap;
private static Greeting save(Greeting greeting) {
if (greetingMap == null) {
greetingMap = new HashMap<BigInteger, Greeting>();
nextId = BigInteger.ONE;
}
greeting.setId(nextId);
nextId = nextId.add(BigInteger.ONE);
greetingMap.put(greeting.getId(), greeting);
return greeting;
}
static {
Greeting g1 = new Greeting();
g1.setText("Hello World");
save(g1);
Greeting g2 = new Greeting();
g2.setText("Hola Mundo!");
save(g2);
}
@RequestMapping(
value = "/api/greetings",
method = RequestMethod.GET,
produces = MediaType.APPLICATION_JSON_VALUE)
public ResponseEntity<Collection<Greeting>> getGreetings() {
Collection<Greeting> greetings = greetingMap.values();
return new ResponseEntity<Collection<Greeting>>(greetings, HttpStatus.OK);
}
}
Pom.xml文件
<modelVersion>4.0.0</modelVersion>
<groupId>com.hakeem.webservice2</groupId>
<artifactId>WebService2</artifactId>
<version>0.0.1-SNAPSHOT</version>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>1.2.1.RELEASE</version>
</parent>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
</dependencies>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
每当我运行get请求时,我都会收到Postman的回复:
{
"timestamp": 1439128293727,
"status": 404,
"error": "Not Found",
"message": "No message available",
"path": "/api/greetings"
}
来自chrome的或以下内容:
Whitelabel错误页面
此应用程序没有/ error的显式映射,因此您将此视为后备。
Sun Aug 09 08:43:41 COT 2015 出现意外错误(type = Not Found,status = 404)。 没有可用的消息
我一步一步地关注了视频。视频的导师似乎没有做任何额外的事情。 每当我输入
本地主机:8080 / API /问候
我得到的只是前面提到的错误。
的增添。这是控制台输出,我不知道它是否有用:
2015-08-09 10:49:09.918 INFO 7696 --- [main] com.hakeem.webservice2.Application:使用PID 7696在笔记本电脑上启动应用程序(C:\ Users \ HakeemAbdussamad \ Documents \ MarsWorkspace \ WebService2 \目标\类由HakeemAbdussamad在C:\ Users \ HakeemAbdussamad \ Documents \ MarsWorkspace \ WebService2中启动 2015-08-09 10:49:09.988 INFO 7696 --- [main] ationConfigEmbeddedWebApplicationContext:刷新org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7bb0e64a:启动日期[Sun Aug 09 10:49:09 COT 2015];上下文层次结构的根 2015-08-09 10:49:10.710 INFO 7696 --- [main] o.s.b.f.s.DefaultListableBeanFactory:覆盖bean的bean定义beanNameViewResolver&#39 ;: replacement [root bean:class [null];范围=;抽象= FALSE; lazyInit = FALSE; autowireMode = 3; dependencyCheck = 0; autowireCandidate = TRUE;初级= FALSE; factoryBeanName = org.springframework.boot.autoconfigure.web.ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration; factoryMethodName = beanNameViewResolver; initMethodName = NULL; destroyMethodName =(推断);在类路径资源[org / springframework / boot / autoconfigure / web / ErrorMvcAutoConfiguration $ WhitelabelErrorViewConfiguration.class]中定义[Root bean:class [null];范围=;抽象= FALSE; lazyInit = FALSE; autowireMode = 3; dependencyCheck = 0; autowireCandidate = TRUE;初级= FALSE; factoryBeanName = org.springframework.boot.autoconfigure.web.WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter; factoryMethodName = beanNameViewResolver; initMethodName = NULL; destroyMethodName =(推断);在类路径资源中定义[org / springframework / boot / autoconfigure / web / WebMvcAutoConfiguration $ WebMvcAutoConfigurationAdapter.class]] 2015-08-09 10:49:11.547 INFO 7696 --- [main] s.b.c.e.t.TomcatEmbeddedServletContainer:使用端口初始化的Tomcat:8080(http) 2015-08-09 10:49:11.797 INFO 7696 --- [main] o.apache.catalina.core.StandardService:启动服务Tomcat 2015-08-09 10:49:11.801 INFO 7696 --- [main] org.apache.catalina.core.StandardEngine:启动Servlet引擎:Apache Tomcat / 8.0.15 2015-08-09 10:49:11.926 INFO 7696 --- [ost-startStop-1] o.a.c.c.C. [Tomcat]。[localhost]。[/]:初始化Spring嵌入式WebApplicationContext 2015-08-09 10:49:11.926 INFO 7696 --- [ost-startStop-1] o.s.web.context.ContextLoader:Root WebApplicationContext:初始化于1942年完成 2015-08-09 10:49:12.743 INFO 7696 --- [ost-startStop-1] o.s.b.c.e.ServletRegistrationBean:映射servlet:&#39; dispatcherServlet&#39;至 [/] 2015-08-09 10:49:12.747 INFO 7696 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean:映射过滤器:&#39; characterEncodingFilter&#39;至:[/ ] 2015-08-09 10:49:12.747 INFO 7696 --- [ost-startStop-1] o.s.b.c.embedded.FilterRegistrationBean:映射过滤器:&#39; hiddenHttpMethodFilter&#39;致:[/ ] 2015-08-09 10:49:12.963 INFO 7696 --- [main] swsmmaRequestMappingHandlerAdapter:寻找@ControllerAdvice:org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@7bb0e64a:启动日期[Sun Aug 09 10:49: 09 COT 2015];上下文层次结构的根 2015-08-09 10:49:13.035 INFO 7696 --- [main] swsmmaRequestMappingHandlerMapping:Mapped&#34; {[/ error],methods = [],params = [],headers = [],consume = [ ],产生= [],定制= []}&#34; on public org.springframework.http.ResponseEntity&gt; org.springframework.boot.autoconfigure.web.BasicErrorController.error(javax.servlet.http.HttpServletRequest) 2015-08-09 10:49:13.036 INFO 7696 --- [main] swsmmaRequestMappingHandlerMapping:Mapped&#34; {[/ error],methods = [],params = [],headers = [],consume = [ ],产生= [text / html的],定制= []}&#34; on public org.springframework.web.servlet.ModelAndView org.springframework.boot.autoconfigure.web.BasicErrorController.errorHtml(javax.servlet.http.HttpServletRequest) 2015-08-09 10:49:13.108 INFO 7696 --- [main] o.s.w.s.handler.SimpleUrlHandlerMapping:将URL路径[/ ]映射到[class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]类型的处理程序 2015-08-09 10:49:13.108 INFO 7696 --- [main] oswshandler.SimpleUrlHandlerMapping:映射的URL路径[/ webjars / ]到类型为[class org.springframework.web.servlet.resource]的处理程序.ResourceHttpRequestHandler] 2015-08-09 10:49:13.191 INFO 7696 --- [main] oswshandler.SimpleUrlHandlerMapping:将URL路径[/**/favicon.ico]映射到[class org.springframework.web.servlet.resource]类型的处理程序.ResourceHttpRequestHandler] 2015-08-09 10:49:13.276 INFO 7696 --- [main] o.s.j.e.a.AnnotationMBeanExporter:在启动时为JMX曝光注册bean 2015-08-09 10:49:13.329 INFO 7696 --- [main] s.b.c.e.t.TomcatEmbeddedServletContainer:Tomcat在端口上启动:8080(http) 2015-08-09 10:49:13.331 INFO 7696 --- [main] com.hakeem.webservice2.Application:在3.733秒内启动应用程序(JVM运行4.32)
答案 0 :(得分:4)
给定的代码看起来正确。查看完整的来源可能会有所帮助。例如 - 如果Application
类不在同一个包中或row.setGravity(Gravity.CENTER_HORIZONTAL);
类的子包中,则不会扫描它,因此您将出现此错误。