Spring Boot Cannot access REST Controller on localhost 404

Question

I am trying to adapt the REST Controller example on the Spring Boot website  Unfortunately I ve got the following error when I am trying to access the localhost 8080 item URL         timestamp   1436442596410     status   404     error    Not Found      message    No message available      path     item      POM    lt 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  gt      lt modelVersion gt 4 0 0 lt  modelVersion gt      lt groupId gt SpringBootTest lt  groupId gt      lt artifactId gt SpringBootTest lt  artifactId gt      lt version gt 0 0 1-SNAPSHOT lt  version gt      lt properties gt         lt javaVersion gt 1 8 lt  javaVersion gt         lt mainClassPackage gt com nice application lt  mainClassPackage gt         lt mainClass gt   mainClassPackage  InventoryApp lt  mainClass gt      lt  properties gt       lt build gt         lt plugins gt            lt plugin gt               lt artifactId gt maven-compiler-plugin lt  artifactId gt               lt version gt 3 3 lt  version gt               lt configuration gt                  lt source gt   javaVersion  lt  source gt                  lt target gt   javaVersion  lt  target gt               lt  configuration gt            lt  plugin gt             lt  -- Makes the Spring Boot app executable for a jar file  The additional configuration is needed for the cmd  mvn spring-boot repackage              OR mvn spring-boot run -- gt            lt plugin gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-maven-plugin lt  artifactId gt                lt configuration gt                  lt mainClass gt   mainClass  lt  mainClass gt                  lt layout gt ZIP lt  layout gt               lt  configuration gt               lt executions gt                  lt execution gt                     lt goals gt                        lt goal gt repackage lt  goal gt                     lt  goals gt                  lt  execution gt               lt  executions gt            lt  plugin gt             lt  -- Create a jar with a manifest -- gt            lt plugin gt               lt groupId gt org apache maven plugins lt  groupId gt               lt artifactId gt maven-jar-plugin lt  artifactId gt               lt version gt 2 4 lt  version gt               lt configuration gt                  lt archive gt                     lt manifest gt                        lt mainClass gt   mainClass  lt  mainClass gt                     lt  manifest gt                  lt  archive gt               lt  configuration gt            lt  plugin gt         lt  plugins gt      lt  build gt       lt dependencyManagement gt         lt dependencies gt            lt dependency gt               lt  -- Import dependency management from Spring Boot  This replaces the usage of the Spring Boot parent POM file  -- gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-dependencies lt  artifactId gt               lt version gt 1 2 5 RELEASE lt  version gt               lt type gt pom lt  type gt               lt scope gt import lt  scope gt            lt  dependency gt             lt  -- more comfortable usage of several features when developing in an IDE  Developer tools are automatically disabled when              running a fully packaged application  If your application is launched using java -jar or if it   s started using a special classloader               then it is considered a  production application   Applications that use spring-boot-devtools will automatically restart whenever files              on the classpath change  -- gt            lt dependency gt               lt groupId gt org springframework boot lt  groupId gt               lt artifactId gt spring-boot-devtools lt  artifactId gt            lt  dependency gt         lt  dependencies gt      lt  dependencyManagement gt       lt dependencies gt         lt dependency gt            lt groupId gt org springframework boot lt  groupId gt            lt artifactId gt spring-boot-starter-web lt  artifactId gt         lt  dependency gt          lt dependency gt            lt groupId gt org springframework boot lt  groupId gt            lt artifactId gt spring-boot-starter-test lt  artifactId gt            lt scope gt test lt  scope gt         lt  dependency gt          lt dependency gt            lt groupId gt com google guava lt  groupId gt            lt artifactId gt guava lt  artifactId gt            lt version gt 15 0 lt  version gt         lt  dependency gt      lt  dependencies gt   lt  project gt    Starter-Application   package com nice application   SpringBootApplication    same as  Configuration  EnableAutoConfiguration  ComponentScan public class InventoryApp      public static void main  String   args           SpringApplication run  InventoryApp class  args             REST-Controller   package com nice controller    RestController    shorthand for  Controller and  ResponseBody rolled together public class ItemInventoryController      public ItemInventoryController               RequestMapping    item       public String getStockItem           return  It s working                 I am building this project with Maven  Started it as jar  spring-boot run  and as well inside the IDE  Eclipse    Console Log   2015-07-09 14 21 52 132  INFO 1204 ---             main  c b i p s e i a InventoryApp            Starting InventoryApp on 101010002016M with PID 1204  C  eclipse workspace SpringBootTest target classes started by MFE in C  eclipse workspace SpringBootTest  2015-07-09 14 21 52 165  INFO 1204 ---             main  ationConfigEmbeddedWebApplicationContext   Refreshing org springframework boot context embedded AnnotationConfigEmbeddedWebApplicationContext 7a3d45bd  startup date  Thu Jul 09 14 21 52 CEST 2015   root of context hierarchy 2015-07-09 14 21 52 661  INFO 1204 ---             main  o s b f s DefaultListableBeanFactory       Overriding bean definition for bean  beanNameViewResolver   replacing  Root bean  class  null   scope   abstract false  lazyInit false  autowireMode 3  dependencyCheck 0  autowireCandidate true  primary false  factoryBeanName org springframework boot autoconfigure web ErrorMvcAutoConfiguration WhitelabelErrorViewConfiguration  factoryMethodName beanNameViewResolver  initMethodName null  destroyMethodName  inferred   defined in class path resource  org springframework boot autoconfigure web ErrorMvcAutoConfiguration WhitelabelErrorViewConfiguration class   with  Root bean  class  null   scope   abstract false  lazyInit false  autowireMode 3  dependencyCheck 0  autowireCandidate true  primary false  factoryBeanName org springframework boot autoconfigure web WebMvcAutoConfiguration WebMvcAutoConfigurationAdapter  factoryMethodName beanNameViewResolver  initMethodName null  destroyMethodName  inferred   defined in class path resource  org springframework boot autoconfigure web WebMvcAutoConfiguration WebMvcAutoConfigurationAdapter class   2015-07-09 14 21 53 430  INFO 1204 ---             main  s b c e t TomcatEmbeddedServletContainer   Tomcat initialized with port s   8080  http  2015-07-09 14 21 53 624  INFO 1204 ---             main  o apache catalina core StandardService     Starting service Tomcat 2015-07-09 14 21 53 625  INFO 1204 ---             main  org apache catalina core StandardEngine    Starting Servlet Engine  Apache Tomcat 8 0 23 2015-07-09 14 21 53 731  INFO 1204 ---  ost-startStop-1  o a c c C  Tomcat   localhost              Initializing Spring embedded WebApplicationContext 2015-07-09 14 21 53 731  INFO 1204 ---  ost-startStop-1  o s web context ContextLoader              Root WebApplicationContext  initialization completed in 1569 ms 2015-07-09 14 21 54 281  INFO 1204 ---  ost-startStop-1  o s b c e ServletRegistrationBean          Mapping servlet   dispatcherServlet  to     2015-07-09 14 21 54 285  INFO 1204 ---  ost-startStop-1  o s b c embedded FilterRegistrationBean    Mapping filter   characterEncodingFilter  to       2015-07-09 14 21 54 285  INFO 1204 ---  ost-startStop-1  o s b c embedded FilterRegistrationBean    Mapping filter   hiddenHttpMethodFilter  to       2015-07-09 14 21 54 508  INFO 1204 ---             main  s w s m m a RequestMappingHandlerAdapter   Looking for  ControllerAdvice  org springframework boot context embedded AnnotationConfigEmbeddedWebApplicationContext 7a3d45bd  startup date  Thu Jul 09 14 21 52 CEST 2015   root of context hierarchy 2015-07-09 14 21 54 573  INFO 1204 ---             main  s w s m m a RequestMappingHandlerMapping   Mapped     error    onto public org springframework http ResponseEntity lt java util Map lt java lang String  java lang Object gt  gt  org springframework boot autoconfigure web BasicErrorController error javax servlet http HttpServletRequest  2015-07-09 14 21 54 573  INFO 1204 ---             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 BasicErrorController errorHtml javax servlet http HttpServletRequest  2015-07-09 14 21 54 594  INFO 1204 ---             main  o s w s handler SimpleUrlHandlerMapping    Mapped URL path   webjars     onto handler of type  class org springframework web servlet resource ResourceHttpRequestHandler  2015-07-09 14 21 54 594  INFO 1204 ---             main  o s w s handler SimpleUrlHandlerMapping    Mapped URL path       onto handler of type  class org springframework web servlet resource ResourceHttpRequestHandler  2015-07-09 14 21 54 633  INFO 1204 ---             main  o s w s handler SimpleUrlHandlerMapping    Mapped URL path      favicon ico  onto handler of type  class org springframework web servlet resource ResourceHttpRequestHandler  2015-07-09 14 21 54 710  INFO 1204 ---             main  o s j e a AnnotationMBeanExporter          Registering beans for JMX exposure on startup 2015-07-09 14 21 54 793  INFO 1204 ---             main  s b c e t TomcatEmbeddedServletContainer   Tomcat started on port s   8080  http  2015-07-09 14 21 54 795  INFO 1204 ---             main  c b i p s e i a InventoryApp            Started InventoryApp in 2 885 seconds  JVM running for 3 227  2015-07-09 14 22 10 911  INFO 1204 ---  nio-8080-exec-1  o a c c C  Tomcat   localhost              Initializing Spring FrameworkServlet  dispatcherServlet  2015-07-09 14 22 10 911  INFO 1204 ---  nio-8080-exec-1  o s web servlet DispatcherServlet          FrameworkServlet  dispatcherServlet   initialization started 2015-07-09 14 22 10 926  INFO 1204 ---  nio-8080-exec-1  o s web servlet DispatcherServlet          FrameworkServlet  dispatcherServlet   initialization completed in 15 ms   What I ve tried so far     Accessing the URL with the application name  InventoryApp  Put another  RequestMapping      at class level of the ItemInventoryController   As far as I understood  I won t need an application-context when using Spring Boot  Am I right   What else can I do to access the method via URL

User · Answer

Place your springbootapplication class in root package for example if your service controller is in springBoot xyz package then your main class should be in springBoot package otherwise it will not scan below packages

User · Answer

Adding to MattR s answer  As stated in here   SpringBootApplication automatically inserts the needed annotations   Configuration   EnableAutoConfiguration  and also  ComponentScan  however  the  ComponentScan will only look for the components in the same package as the App  in this case your com nice application  whereas your controller resides in com nice controller  That s why you get 404 because the App didn t find the controller in the application package

User · Answer

For me  the problem was that I had set up the Application in a way that it always immediately shut down after starting  So by the time I tried out if I could access the controller  the Application wasn t running anymore  The problem with immediately shutting down is adressed in this thread

User · Answer

It also works if we use as follows    SpringBootApplication scanBasePackages       lt class ItemInventoryController package  gt

User · Answer

You need to modify the Starter-Application class as shown below     SpringBootApplication   EnableAutoConfiguration   ComponentScan basePackages  com nice application     EnableJpaRepositories  com spring app repository    public class InventoryApp extends SpringBootServletInitializer               And update the Controller  Service and Repository packages structure as I mentioned below    Example  REST-Controller  package com nice controller    --    It has to be modified as package com nice application controller   You need to follow proper package structure for all packages which are in Spring Boot MVC flow   So  If you modify your project bundle package structures correctly then your spring boot app will work correctly

User · Answer

I had this issue and what you need to do is fix your packages  If you downloaded this project from http   start spring io  then you have your main class in some package  For example if the package for the main class is   com example  then and your controller must be in package   com example controller   Hope this helps

User · Answer

for me  I was adding spring-web instead of the spring-boot-starter-web into my pom xml  when i replace it from spring-web to spring-boot-starter-web  all maping is shown in the console log

User · Answer

SpringBoot developers recommend to locate your main application class in a root package above other classes  Using a root package also allows the  ComponentScan annotation to be used without needing to specify a basePackage attribute   Detailed info But be sure that the custom root package exists

User · Answer

Another solution in case it helps  in my case  the problem was that I had a  RequestMapping  quot  xxx quot   at class level  in my controller   and in the exposed services I had  PostMapping  value    quot  yyyy quot   and  GetMapping  value    quot  zzz quot    once I commented the  RequestMapping  quot  xxx quot   and managed all at method level  worked like a charm

User · Answer

There are 2 method to overcome this   Place the bootup application at start of the package structure and rest all controller inside it   Example     package com spring boot app  - You bootup application i e  Main Method -SpringApplication run App class  args     You Rest Controller in with the same package structure Example   package com spring boot app rest  Explicitly define the Controller in the Bootup package    Method 1 is more cleaner

User · Answer

You can add inside the POM    lt dependency gt       lt groupId gt org springframework boot lt  groupId gt       lt artifactId gt spring-boot-configuration-processor lt  artifactId gt       lt version gt XXXXXXXXX lt  version gt   lt  dependency gt

User · Answer

Same 404 response I got after service executed with the below code    Controller  RequestMapping   duecreate v1 0   public class DueCreateController        Response      timestamp   1529692263422   status   404   error    Not Found    message    No message available    path     duecreate v1 0 status      after changing it to below code I received proper response   RestController  RequestMapping   duecreate v1 0   public class DueCreateController        Response      batchId    DUE1529673844630    batchType   null   executionDate   null   status    OPEN

User · Answer

Sometimes spring boot behaves weird  I specified below in application class and it works    ComponentScan  com seic deliveryautomation controller

User · Answer

Replace  RequestMapping    item    with  GetMapping value   item   produces MediaType APPLICATION JSON VALUE    Maybe it will help somebody

User · Answer

The problem is with your package structure  Spring Boot Application has a specific package structure to allow spring context to scan and load various beans in its context   In com nice application is where your Main Class is and in com nice controller  you have your controller classes   Move your com nice controller package into com nice application so that Spring can access your beans

User · Answer

It could be that something else is running on port 8080  and you re actually connecting to it by mistake    Definitely check that out  especially if you have dockers that are bringing up other services you don t control  and are port forwarding those services

User · Answer

I had exact same error  I was not giving base package  Giving correct base package ressolved it    package com ymc backend ymcbe   import org springframework boot SpringApplication  import org springframework boot autoconfigure SpringBootApplication  import org springframework context annotation ComponentScan    SpringBootApplication  ComponentScan basePackages  com ymc backend   public class YmcbeApplication        public static void main String   args            SpringApplication run YmcbeApplication class  args                 Note  not including  controller    ComponentScan basePackages  com ymc backend controller   because i   have many other component classes which my project does not scan if i   just give  controller   Here is my controller sample    package com ymc backend controller   import org springframework beans factory annotation Autowired  import org springframework web bind annotation CrossOrigin  import org springframework web bind annotation PostMapping  import org springframework web bind annotation RequestBody  import org springframework web bind annotation RequestMapping  import org springframework web bind annotation RestController     RestController  CrossOrigin  RequestMapping value     user   public class UserController         PostMapping   sendOTP       public String sendOTP             return  OTP sent

User · Answer

I got the 404 problem  because of Url Case Sensitivity    For example   RequestMapping value     api getEmployeeData  method   RequestMethod GET  should be accessed using http   www example com api getEmployeeData  If we are using http   www example com api getemployeedata  we ll get the 404 error   Note  http   www example com is just for reference which i mentioned above  It should be your domain name where you hosted your application   After a lot of struggle and apply all the other answers in this post  I got that the problem is with that url only  It might be silly problem  But it cost my 2 hours  So I hope it will help someone

User · Answer

Try adding the following to your InventoryApp class   SpringBootApplication  ComponentScan basePackageClasses   ItemInventoryController class  public class InventoryApp         spring-boot will scan for components in packages below com nice application  so if your controller is in com nice controller you need to scan for it explicitly

[java] Spring Boot: Cannot access REST Controller on localhost (404)

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