我正在构建具有以下依赖性的代码"tollrate-billboard"。当我尝试构建代码> mvn clean install -DskipTests时，出现以下错误。
此外，HystrixCommand已经是hystrix-javanica-1.5.12.jar的一部分，因此编译器仍然抱怨这一点。
任何人都可以指导出什么问题吗？
错误：
[ERROR] Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project tollrate-billboard: Compilation failure: Compilation failure:
[ERROR] /C:/Users/pc/Desktop/Not_working/tollrate-billboard/src/main/java/pluralsight/demo/DashboardController.java:[13,55] package com.netflix.hystrix.contrib.javanica.annotation does not exist
[ERROR] /C:/Users/pc/Desktop/Not_working/tollrate-billboard/src/main/java/pluralsight/demo/DashboardController.java:[28,10] cannot find symbol
[ERROR] symbol: class HystrixCommand
[ERROR] location: class pluralsight.demo.DashboardController
[ERROR] -> [Help 1]
org.apache.maven.lifecycle.LifecycleExecutionException: Failed to execute goal org.apache.maven.plugins:maven-compiler-plugin:3.7.0:compile (default-compile) on project tollrate-billboard: Compilation failure
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:213)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
Caused by: org.apache.maven.plugin.compiler.CompilationFailureException: Compilation failure
at org.apache.maven.plugin.compiler.AbstractCompilerMojo.execute (AbstractCompilerMojo.java:1161)
at org.apache.maven.plugin.compiler.CompilerMojo.execute (CompilerMojo.java:168)
at org.apache.maven.plugin.DefaultBuildPluginManager.executeMojo (DefaultBuildPluginManager.java:134)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:208)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:154)
at org.apache.maven.lifecycle.internal.MojoExecutor.execute (MojoExecutor.java:146)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:117)
at org.apache.maven.lifecycle.internal.LifecycleModuleBuilder.buildProject (LifecycleModuleBuilder.java:81)
at org.apache.maven.lifecycle.internal.builder.singlethreaded.SingleThreadedBuilder.build (SingleThreadedBuilder.java:51)
at org.apache.maven.lifecycle.internal.LifecycleStarter.execute (LifecycleStarter.java:128)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:309)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
DashboardController.java
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;
@Controller
public class DashboardController {
@LoadBalanced
@Bean
public RestTemplate restTemplate(RestTemplateBuilder builder) {
return builder.build();
}
@Autowired
private RestTemplate restTemplate;
@HystrixCommand(fallbackMethod = "getTollRateBackup")
@RequestMapping("/dashboard")
public String GetTollRate(@RequestParam int stationId, Model m) {
TollRate tr = restTemplate.getForObject("http://pluralsight-toll-service/tollrate/"+ stationId, TollRate.class);
System.out.println("stationId: " + stationId);
m.addAttribute("rate", tr.getCurrentRate());
return "dashboard";
}
public String getTollRateBackup(@RequestParam int stationId, Model m) {
System.out.println("Fallback operation called");
m.addAttribute("rate", "1.00");
return "dashboard";
}
}
pom.xml
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.4.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>
<spring-cloud.version>Finchley.SR1</spring-cloud.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-thymeleaf</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<version>1.4.5.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
EDIT-1：
[ERROR] [ERROR] Some problems were encountered while processing the POMs:
[ERROR] Non-resolvable import POM: Could not find artifact org.springframework.cloud:spring-cloud-starters:pom:1.0.0.BUILD-SNAPSHOT @ line 67, column 16
@
[ERROR] The build could not read 1 project -> [Help 1]
org.apache.maven.project.ProjectBuildingException: Some problems were encountered while processing the POMs:
[ERROR] Non-resolvable import POM: Could not find artifact org.springframework.cloud:spring-cloud-starters:pom:1.0.0.BUILD-SNAPSHOT @ line 67, column 16
at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:382)
at org.apache.maven.graph.DefaultGraphBuilder.collectProjects (DefaultGraphBuilder.java:400)
at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor (DefaultGraphBuilder.java:391)
at org.apache.maven.graph.DefaultGraphBuilder.build (DefaultGraphBuilder.java:78)
at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:511)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:221)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
[ERROR]
[ERROR] The project pluralsight.demo:tollrate-billboard:1.0 (C:\Users\pc\Desktop\Not_working\tollrate-billboard\pom.xml) has 1 error
[ERROR] Non-resolvable import POM: Could not find artifact org.springframework.cloud:spring-cloud-starters:pom:1.0.0.BUILD-SNAPSHOT @ line 67, column 16 -> [Help 2]
org.apache.maven.model.resolution.UnresolvableModelException: Could not find artifact org.springframework.cloud:spring-cloud-starters:pom:1.0.0.BUILD-SNAPSHOT
at org.apache.maven.project.ProjectModelResolver.resolveModel (ProjectModelResolver.java:197)
at org.apache.maven.model.building.DefaultModelBuilder.importDependencyManagement (DefaultModelBuilder.java:1245)
at org.apache.maven.model.building.DefaultModelBuilder.build (DefaultModelBuilder.java:457)
at org.apache.maven.model.building.DefaultModelBuilder.build (DefaultModelBuilder.java:423)
at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:580)
at org.apache.maven.project.DefaultProjectBuilder.build (DefaultProjectBuilder.java:372)
at org.apache.maven.graph.DefaultGraphBuilder.collectProjects (DefaultGraphBuilder.java:400)
at org.apache.maven.graph.DefaultGraphBuilder.getProjectsForMavenReactor (DefaultGraphBuilder.java:391)
at org.apache.maven.graph.DefaultGraphBuilder.build (DefaultGraphBuilder.java:78)
at org.apache.maven.DefaultMaven.buildGraph (DefaultMaven.java:511)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:221)
at org.apache.maven.DefaultMaven.doExecute (DefaultMaven.java:194)
at org.apache.maven.DefaultMaven.execute (DefaultMaven.java:107)
at org.apache.maven.cli.MavenCli.execute (MavenCli.java:955)
at org.apache.maven.cli.MavenCli.doMain (MavenCli.java:290)
at org.apache.maven.cli.MavenCli.main (MavenCli.java:194)
at sun.reflect.NativeMethodAccessorImpl.invoke0 (Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke (NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke (DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke (Method.java:498)
at org.codehaus.plexus.classworlds.launcher.Launcher.launchEnhanced (Launcher.java:289)
at org.codehaus.plexus.classworlds.launcher.Launcher.launch (Launcher.java:229)
at org.codehaus.plexus.classworlds.launcher.Launcher.mainWithExitCode (Launcher.java:415)
at org.codehaus.plexus.classworlds.launcher.Launcher.main (Launcher.java:356)
答案 0 :(得分：0)
将以下内容放在您的<dependencies>标记上方，然后重新检查：
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starters</artifactId>
<version>1.0.0.BUILD-SNAPSHOT</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
，还从您已经在pom文件中定义为的依赖项中删除spring-cloud-starter-hystrix的版本标记：
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-hystrix</artifactId>
<!-- <version>1.4.5.RELEASE</version> ::::REMOVE THIS LINE:::: -->
</dependency>