我使用Spring Boot和Kotlin。其余控制器为所有端点返回404错误。在起始日志中，控制器中的端点不存在。任何端点都返回相同的404响应。
这些是我尝试过的步骤，
控制器：
package com.example.controller
import org.springframework.web.bind.annotation.RestController
import org.springframework.web.bind.annotation.PathVariable
import org.springframework.http.ResponseEntity
import org.springframework.web.bind.annotation.GetMapping
import org.springframework.http.HttpStatus
import org.springframework.web.bind.annotation.PostMapping
import org.springframework.web.bind.annotation.PutMapping
import org.springframework.web.bind.annotation.DeleteMapping
import org.springframework.web.bind.annotation.RequestBody
import Cricketer
import CricketerRepository
import CricketerService
import org.springframework.web.bind.annotation.RequestMapping
@RestController
@RequestMapping("/api")
class CricketerController(private val cricketerService: CricketerService , private val cricketerRepository: CricketerRepository){
@GetMapping("/cricketers/{id}")
fun getCricketer(@PathVariable("id") id: Long):ResponseEntity<Cricketer> {
val cricketer = cricketerService.findById(id)
return ResponseEntity<Cricketer>(cricketer as Cricketer, HttpStatus.OK);
}
@GetMapping("/cricketers/")
fun getAllCricketers() :ResponseEntity<List<Cricketer>> {
var cricketersList: ArrayList<Cricketer> = cricketerService.getAllPlayers() as (ArrayList<Cricketer>)
return ResponseEntity<List<Cricketer>>(cricketersList, HttpStatus.OK)
}
@PostMapping("/cricketer/")
fun addCricketer(@RequestBody cricketer:Cricketer):ResponseEntity<Cricketer> {
val cCricketer : Cricketer = Cricketer(name = cricketer.name
, country = cricketer.country
, highestScore = cricketer.highestScore)
cricketerRepository.save(cCricketer)
return ResponseEntity<Cricketer>(cricketer , HttpStatus.OK)
}
@PutMapping("/cricketer/{id}")
fun updateCricketer(@PathVariable("id") id: Long, @RequestBody cricketer: Cricketer ):ResponseEntity<Cricketer> {
val cCricketer = Cricketer(name = cricketer.name
, country = cricketer.country
, highestScore = cricketer.highestScore)
cricketerRepository.save(cCricketer)
return ResponseEntity<Cricketer>(cricketer, HttpStatus.OK)
}
@DeleteMapping("/cricketer/{id}")
fun deleteCricketer(@PathVariable("id") id:Long ):ResponseEntity<String> {
val cCricketer :Cricketer = cricketerService.findById(id) as Cricketer
cricketerRepository.delete(cCricketer)
return ResponseEntity<String>("cricketer removed", HttpStatus.OK)
}
}
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<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.example</groupId>
<artifactId>Spring-Kotlin-Rest-API</artifactId>
<version>0.0.1-SNAPSHOT</version>
<packaging>jar</packaging>
<name>Spring-Kotlin-Rest-API</name>
<description>Spring Boot Kotlin REST API Example</description>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.0.2.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>
<kotlin.version>1.2.41</kotlin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.module</groupId>
<artifactId>jackson-module-kotlin</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-stdlib-jdk8</artifactId>
</dependency>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-reflect</artifactId>
</dependency>
<dependency>
<groupId>mysql</groupId>
<artifactId>mysql-connector-java</artifactId>
<scope>runtime</scope>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
</dependency>
</dependencies>
<build>
<sourceDirectory>${project.basedir}/src/main/kotlin</sourceDirectory>
<testSourceDirectory>${project.basedir}/src/test/kotlin</testSourceDirectory>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
<plugin>
<artifactId>kotlin-maven-plugin</artifactId>
<groupId>org.jetbrains.kotlin</groupId>
<configuration>
<args>
<arg>-Xjsr305=strict</arg>
</args>
<compilerPlugins>
<plugin>spring</plugin>
</compilerPlugins>
<jvmTarget>1.8</jvmTarget>
</configuration>
<dependencies>
<dependency>
<groupId>org.jetbrains.kotlin</groupId>
<artifactId>kotlin-maven-allopen</artifactId>
<version>${kotlin.version}</version>
</dependency>
</dependencies>
</plugin>
</plugins>
</build>
</project>
启动日志
2018-05-21 22:31:19.490 INFO 3061 --- [ main] c.e.d.SpringKotlinRestApiApplicationKt : Starting SpringKotlinRestApiApplicationKt on nirmal-desktop with PID 3061 (/home/nirmal/code/workspace-sts-3.9.1.RELEASE/Spring-Kotlin-Rest-API/target/classes started by root in /home/nirmal/code/workspace-sts-3.9.1.RELEASE/Spring-Kotlin-Rest-API)
2018-05-21 22:31:19.512 INFO 3061 --- [ main] c.e.d.SpringKotlinRestApiApplicationKt : No active profile set, falling back to default profiles: default
2018-05-21 22:31:19.592 INFO 3061 --- [ main] ConfigServletWebServerApplicationContext : Refreshing org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@5bab7c16: startup date [Mon May 21 22:31:19 IST 2018]; root of context hierarchy
2018-05-21 22:31:29.492 INFO 3061 --- [ main] trationDelegate$BeanPostProcessorChecker : Bean 'org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration' of type [org.springframework.transaction.annotation.ProxyTransactionManagementConfiguration$$EnhancerBySpringCGLIB$$28d3b505] is not eligible for getting processed by all BeanPostProcessors (for example: not eligible for auto-proxying)
2018-05-21 22:31:33.847 INFO 3061 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat initialized with port(s): 8080 (http)
2018-05-21 22:31:34.312 INFO 3061 --- [ main] o.apache.catalina.core.StandardService : Starting service [Tomcat]
2018-05-21 22:31:34.313 INFO 3061 --- [ main] org.apache.catalina.core.StandardEngine : Starting Servlet Engine: Apache Tomcat/8.5.31
2018-05-21 22:31:34.389 INFO 3061 --- [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: [/usr/java/packages/lib/amd64:/usr/lib64:/lib64:/lib:/usr/lib]
2018-05-21 22:31:36.190 INFO 3061 --- [ost-startStop-1] o.a.c.c.C.[Tomcat].[localhost].[/] : Initializing Spring embedded WebApplicationContext
2018-05-21 22:31:36.190 INFO 3061 --- [ost-startStop-1] o.s.web.context.ContextLoader : Root WebApplicationContext: initialization completed in 16602 ms
2018-05-21 22:31:36.560 INFO 3061 --- [ost-startStop-1] o.s.b.w.servlet.ServletRegistrationBean : Servlet dispatcherServlet mapped to [/]
2018-05-21 22:31:36.564 INFO 3061 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'characterEncodingFilter' to: [/*]
2018-05-21 22:31:36.566 INFO 3061 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'hiddenHttpMethodFilter' to: [/*]
2018-05-21 22:31:36.566 INFO 3061 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'httpPutFormContentFilter' to: [/*]
2018-05-21 22:31:36.566 INFO 3061 --- [ost-startStop-1] o.s.b.w.servlet.FilterRegistrationBean : Mapping filter: 'requestContextFilter' to: [/*]
2018-05-21 22:31:37.743 INFO 3061 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Starting...
2018-05-21 22:31:39.038 INFO 3061 --- [ main] com.zaxxer.hikari.HikariDataSource : HikariPool-1 - Start completed.
2018-05-21 22:31:39.222 INFO 3061 --- [ main] j.LocalContainerEntityManagerFactoryBean : Building JPA container EntityManagerFactory for persistence unit 'default'
2018-05-21 22:31:39.480 INFO 3061 --- [ main] o.hibernate.jpa.internal.util.LogHelper : HHH000204: Processing PersistenceUnitInfo [
name: default
...]
2018-05-21 22:31:40.064 INFO 3061 --- [ main] org.hibernate.Version : HHH000412: Hibernate Core {5.2.17.Final}
2018-05-21 22:31:40.066 INFO 3061 --- [ main] org.hibernate.cfg.Environment : HHH000206: hibernate.properties not found
2018-05-21 22:31:40.302 INFO 3061 --- [ main] o.hibernate.annotations.common.Version : HCANN000001: Hibernate Commons Annotations {5.0.1.Final}
2018-05-21 22:31:42.180 INFO 3061 --- [ main] org.hibernate.dialect.Dialect : HHH000400: Using dialect: org.hibernate.dialect.MySQL5InnoDBDialect
2018-05-21 22:31:44.235 INFO 3061 --- [ main] o.h.t.schema.internal.SchemaCreatorImpl : HHH000476: Executing import script 'org.hibernate.tool.schema.internal.exec.ScriptSourceInputNonExistentImpl@7d95eb4a'
2018-05-21 22:31:44.237 INFO 3061 --- [ main] j.LocalContainerEntityManagerFactoryBean : Initialized JPA EntityManagerFactory for persistence unit 'default'
2018-05-21 22:31:44.688 INFO 3061 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**/favicon.ico] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-21 22:31:46.829 INFO 3061 --- [ main] s.w.s.m.m.a.RequestMappingHandlerAdapter : Looking for @ControllerAdvice: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@5bab7c16: startup date [Mon May 21 22:31:19 IST 2018]; root of context hierarchy
2018-05-21 22:31:46.894 WARN 3061 --- [ main] aWebConfiguration$JpaWebMvcConfiguration : spring.jpa.open-in-view is enabled by default. Therefore, database queries may be performed during view rendering. Explicitly configure spring.jpa.open-in-view to disable this warning
2018-05-21 22:31:47.072 INFO 3061 --- [ 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)
2018-05-21 22:31:47.073 INFO 3061 --- [ 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)
2018-05-21 22:31:47.121 INFO 3061 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/webjars/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-21 22:31:47.122 INFO 3061 --- [ main] o.s.w.s.handler.SimpleUrlHandlerMapping : Mapped URL path [/**] onto handler of type [class org.springframework.web.servlet.resource.ResourceHttpRequestHandler]
2018-05-21 22:31:49.030 INFO 3061 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Registering beans for JMX exposure on startup
2018-05-21 22:31:49.033 INFO 3061 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Bean with name 'dataSource' has been autodetected for JMX exposure
2018-05-21 22:31:49.047 INFO 3061 --- [ main] o.s.j.e.a.AnnotationMBeanExporter : Located MBean 'dataSource': registering with JMX server as MBean [com.zaxxer.hikari:name=dataSource,type=HikariDataSource]
2018-05-21 22:31:50.682 INFO 3061 --- [ main] o.s.b.w.embedded.tomcat.TomcatWebServer : Tomcat started on port(s): 8080 (http) with context path ''
2018-05-21 22:31:50.695 INFO 3061 --- [ main] c.e.d.SpringKotlinRestApiApplicationKt : Started SpringKotlinRestApiApplicationKt in 34.697 seconds (JVM running for 49.043)
答案 0 :(得分：1)
我猜你的CricketerController不在相对于你的主类的子包中。所以你基本上有两个选择：
使用这两种方法中的任何一种方法都可以使Spring在启动时看到控制器类，因此应该创建映射。
@ComponentScan(basePackages = { "com.example.controller"} )