没有找到网址的网页:http:// localhost:8080在Spring Boot中

Question

我已经启动了我的春季启动应用程序，并且在我看到控制台时申请启动，但是当我尝试打开浏览器以运行以进行运行时，它显示没有找到网页网址：http：//localhost：8080/demo/login.html。这里有什么问题？这是我的代码

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);
    }
}

我的login.html可在

下获得

src/main/resources/templates/login.html 

这是pom.xml

<properties>
    <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-tomcat</artifactId>
        <scope>provided</scope>
    </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>
    <resources>
         <resource>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
        </resource>
    </resources>
</build>

日志清晰显示，当Tomcat服务器以8080端口号启动时，它显示了

 2018-12-19 17:02:24.213  INFO 709136 --- [           main] 
com.test.demo.DemoApplication          : Starting DemoApplication on Test with PID 709136 (C:UsersSyedDocumentsDEMODEMOtargetclasses started by Syed in C:UsersSyedDocumentsDEMODEMO)
 2018-12-19 17:02:24.254  INFO 709136 --- [           main] 
 com.test.demo.DemoApplication          : The following profiles are active: @spring.profiles.active@
2018-12-19 17:02:25.674  INFO 709136 --- [           main] 
o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat initialized with port(s): 8080 (http)
2018-12-19 17:02:25.705  INFO 709136 --- [           main] o.apache.catalina.core.StandardService   : Starting service [Tomcat]
2018-12-19 17:02:25.706  INFO 709136 --- [           main] 
org.apache.catalina.core.StandardEngine  : Starting Servlet Engine: Apache Tomcat/9.0.13
2018-12-19 17:02:25.715  INFO 709136 --- [           main] 
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 FilesJavajdk1.8.0_45bin;C:WindowsSunJavabin;C:Windowssystem32;C:Windows;C:/Program Files/Java/jdk1.8.0_45/bin/../jre/bin/server;C:/Program Files/Java/jdk1.8.0_45/bin/../jre/bin;C:/Program Files/Java/jdk1.8.0_45/bin/../jre/lib/amd64;C:Program Files (x86)RSA SecurID Token Common;C:Program FilesRSA SecurID Token Common;C:Windowssystem32;C:Windows;C:WindowsSystem32Wbem;C:WindowsSystem32WindowsPowerShellv1.0;C:Program Files (x86)CitrixSystem32;C:WindowsSystem32WindowsPowerShellv1.0;C:WindowsSystem32WindowsPowerShellv1.0;C:Program FilesMcAfeeSolidcoreToolsGatherInfo;C:Program FilesMcAfeeSolidcoreToolsScanalyzer;C:Program FilesMcAfeeSolidcore;C:Program FilesMcAfeeSolidcoreToolsScGetCerts;C:Program FilesCitrixSystem32;C:Program FilesCitrixICAService;C:Program FilesCommon FilesHitachi ID;C:Program Filesnodejs;C:WindowsSystem32WindowsPowerShellv1.0;C:Program FilesJavajdk1.8.0_45bin;C:Program FilesJavajdk1.8.0_45jrebin;C:UsersAF68935AppDataRoamingnpm;C:UsersAF68935AppDataRoamingnpmnode_modules@angularclibin;;C:UsersAF68935Downloadsspring-tool-suite-4-4.0.2.RELEASE-e4.9.0-win32.win32.x86_64sts-4.0.2.RELEASE;;.]
2018-12-19 17:02:25.837  INFO 709136 --- [           main] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring embedded WebApplicationContext
 2018-12-19 17:02:25.837  INFO 709136 --- [           main] o.s.web.context.ContextLoader            : Root WebApplicationContext: initialization completed in 1510 ms
2018-12-19 17:02:26.214  INFO 709136 --- [           main] o.s.s.concurrent.ThreadPoolTaskExecutor  : Initializing ExecutorService 'applicationTaskExecutor'
2018-12-19 17:02:26.523  INFO 709136 --- [           main] o.s.b.w.embedded.tomcat.TomcatWebServer  : Tomcat started on port(s): 8080 (http) with context path ''
2018-12-19 17:02:26.542  INFO 709136 --- [           main] com.test.demo.DemoApplication          : Started DemoApplication in 2.95 seconds (JVM running for 3.852)
2018-12-19 17:04:35.175  INFO 709136 --- [nio-8080-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring DispatcherServlet 'dispatcherServlet'

2018-12-19 17：04：35.175信息709136 --- [NIO-8080-EXEC-1] O.S.Web.Servlet.Dispatcherservlet：初始化Servetlet'DispatcherServlet' 2018-12-19 17：04：35.198信息709136 --- [NIO-8080-EXEC-1]

这里有什么问题？任何想法都将不胜感激。

Answer 1

如果您的静态内容位于/static，/public，/resources或/META-INF/resources以外的目录中。

然后将属性spring.resources.static-locations添加到您的application.properties中，以指向静态内容。

spring.resources.static-locations=classpath:/templates/

您将在控制台日志中看到以下消息：

Adding welcome page: class path resource [templates/index.html]

参考文档

默认情况下，Spring Boot提供的目录可提供静态内容 /静态（或/公共或/资源或/元I-INF/资源） classpath

您还可以使用 Spring.Resources.Static-Locations属性（替换默认值 目录位置列表的值）。

Answer 2

如果您正在学习春季，则应阅读有关控制器的信息。尝试创建一个示例控制器，何时运行它，然后转到Localhost：8080/，您应该看到HOME。

@Controller
public class HomeController
{
    @GetMapping("/")
    public String homeInit() {
        return "home";
    }
}

Answer 3

在您提供的代码中，启动对应用程序的GET将返回404 Spring Boot页面，因为您不处理相对路径'/'

您必须添加一个控制器类（带有@controller注释），指示请求映射和请求方法，并渲染您想要的任何页面