使用Spring啓動休息控制器

主要類：使用Spring啓動休息控制器

package com.rsc.springboot_test; 
@SpringBootApplication 
public class SpringBootTest { 
    public static void main(String[] args) { 
     SpringApplication.run(SpringBootTest.class, args); 
    } 
}

控制器類：

package com.rsc.springboot_test_controller; 
@RestController 
public class testController { 

    @RequestMapping("/home") 
    public void home() { 
     System.out.println("@@@Home Controller Called"); 
    } 
}

POM文件：

<?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.mycompany</groupId> 
    <artifactId>springboot_test</artifactId> 
    <version>1.0-SNAPSHOT</version> 
    <packaging>war</packaging> 

    <name>springboot_test</name> 

    <properties> 
     <endorsed.dir>${project.build.directory}/endorsed</endorsed.dir> 
     <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding> 
     <java.version>1.8</java.version> 
     <jjwt.version>0.7.0</jjwt.version> 
    </properties> 

    <parent> 
     <groupId>org.springframework.boot</groupId> 
     <artifactId>spring-boot-starter-parent</artifactId> 
     <version>1.4.2.RELEASE</version> 
     <relativePath/> <!-- lookup parent from repository --> 
    </parent> 

    <dependencies> 
     <dependency> 
      <groupId>javax</groupId> 
      <artifactId>javaee-web-api</artifactId> 
      <version>7.0</version> 
      <scope>provided</scope> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-data-jpa</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-data-rest</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-jdbc</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-security</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.boot</groupId> 
      <artifactId>spring-boot-starter-web</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> 
     <dependency> 
      <groupId>commons-dbcp</groupId> 
      <artifactId>commons-dbcp</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.security.oauth</groupId> 
      <artifactId>spring-security-oauth2</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>io.jsonwebtoken</groupId> 
      <artifactId>jjwt</artifactId> 
      <version>${jjwt.version}</version> 
     </dependency> 
     <!-- https://mvnrepository.com/artifact/org.yaml/snakeyaml --> 
     <dependency> 
      <groupId>org.yaml</groupId> 
      <artifactId>snakeyaml</artifactId> 
      <version>1.17</version> 
     </dependency> 
     <dependency> 
      <groupId>org.springframework.mobile</groupId> 
      <artifactId>spring-mobile-device</artifactId> 
     </dependency> 
     <dependency> 
      <groupId>com.h2database</groupId> 
      <artifactId>h2</artifactId> 
      <scope>runtime</scope> 
     </dependency> 
    </dependencies> 

    <build> 
     <plugins> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-compiler-plugin</artifactId> 
       <version>3.1</version> 
       <configuration> 
        <source>1.7</source> 
        <target>1.7</target> 
        <compilerArguments> 
         <endorseddirs>${endorsed.dir}</endorseddirs> 
        </compilerArguments> 
       </configuration> 
      </plugin> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-war-plugin</artifactId> 
       <version>2.3</version> 
       <configuration> 
        <failOnMissingWebXml>false</failOnMissingWebXml> 
       </configuration> 
      </plugin> 
      <plugin> 
       <groupId>org.apache.maven.plugins</groupId> 
       <artifactId>maven-dependency-plugin</artifactId> 
       <version>2.6</version> 
       <executions> 
        <execution> 
         <phase>validate</phase> 
         <goals> 
          <goal>copy</goal> 
         </goals> 
         <configuration> 
          <outputDirectory>${endorsed.dir}</outputDirectory> 
          <silent>true</silent> 
          <artifactItems> 
           <artifactItem> 
            <groupId>javax</groupId> 
            <artifactId>javaee-endorsed-api</artifactId> 
            <version>7.0</version> 
            <type>jar</type> 
           </artifactItem> 
          </artifactItems> 
         </configuration> 
        </execution> 
       </executions> 
      </plugin> 
     </plugins> 
    </build> 
</project>

及其與其他控制器簡單的彈簧啓動的應用程序。

調用http://localhost:8084/springboot_test/負載的默認index.html頁面

問題是，當我把它http://localhost:8084/springboot_test/home不打印輸出System.out.println("@@@Home Controller Called");，所以我想請求不叫上休息控制器本身。但爲什麼不叫？

更新

上休息控制器使用@ComponentScan("com.rsc.springboot_test")通過@javaguy作品的建議，但我想申請的@componentScan上主類的頂部，所以它會掃描啓動時所有的包。

嘗試下面給出錯誤：

@SpringBootApplication 
@ComponentScan(basePackages = { "com.rsc.*" }) 
public class SpringBootTest { 
    public static void main(String[] args) { 
     SpringApplication.run(SpringBootTest.class, args); 
    } 
}

錯誤：

java.lang.IllegalStateException: ApplicationEventMulticaster not initialized - call 'refresh' before multicasting events via the context: org.springframework.boot[email protected]58f7ff2f: startup date [Wed Nov 09 21:08:20 IST 2016]; root of context hierarchy 
    at org.springframework.context.support.AbstractApplicationContext.getApplicationEventMulticaster(AbstractApplicationContext.java:404) [spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.ApplicationListenerDetector.postProcessBeforeDestruction(ApplicationListenerDetector.java:97) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.DisposableBeanAdapter.destroy(DisposableBeanAdapter.java:253) ~[spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroyBean(DefaultSingletonBeanRegistry.java:578) [spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingleton(DefaultSingletonBeanRegistry.java:554) [spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingleton(DefaultListableBeanFactory.java:954) [spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.destroySingletons(DefaultSingletonBeanRegistry.java:523) [spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.destroySingletons(DefaultListableBeanFactory.java:961) [spring-beans-4.3.4.RELEASE.jar:4.3.4.RELEASE] 


2016-11-09 21:08:20.765 ERROR 8500 --- [o-8084-exec-402] o.s.boot.SpringApplication    : Application startup failed 

org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.rsc.springboot_test.SpringBootTest]; nested exception is org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'testController' for bean class [com.rsc.springboot_test_controller.testController] conflicts with existing, non-compatible bean definition of same name and class [com.rsc.springboot_test.controller.testController] 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:180) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:324) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:246) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:93) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 

    at java.lang.Thread.run(Thread.java:745) [na:1.8.0_102] 
Caused by: org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'testController' for bean class [com.rsc.springboot_test_controller.testController] conflicts with existing, non-compatible bean definition of same name and class [com.rsc.springboot_test.controller.testController] 
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.checkCandidate(ClassPathBeanDefinitionScanner.java:320) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan(ClassPathBeanDefinitionScanner.java:259) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ComponentScanAnnotationParser.parse(ComponentScanAnnotationParser.java:137) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:268) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:230) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
09-Nov-2016 21:08:21.046 SEVERE [http-nio-8084-exec-402] org.apache.catalina.core.ContainerBase.addChildInternal ContainerBase.addChild: start: 
org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/springboot_test]] 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:197) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:166) ~[spring-context-4.3.4.RELEASE.jar:4.3.4.RELEASE] 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:154) 
    ... 61 common frames omitted 

    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725) 

Caused by: org.springframework.beans.factory.BeanDefinitionStoreException: Failed to parse configuration class [com.rsc.springboot_test.SpringBootTest]; nested exception is org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'testController' for bean class [com.rsc.springboot_test_controller.testController] conflicts with existing, non-compatible bean definition of same name and class [com.rsc.springboot_test.controller.testController] 
    at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:180) 
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:324) 
    at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:246) 
    at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanDefinitionRegistryPostProcessors(PostProcessorRegistrationDelegate.java:270) 

Caused by: org.springframework.context.annotation.ConflictingBeanDefinitionException: Annotation-specified bean name 'testController' for bean class [com.rsc.springboot_test_controller.testController] conflicts with existing, non-compatible bean definition of same name and class [com.rsc.springboot_test.controller.testController] 
    at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.checkCandidate(ClassPathBeanDefinitionScanner.java:320) 


09-Nov-2016 21:08:21.200 SEVERE [http-nio-8084-exec-402] org.apache.catalina.startup.HostConfig.deployDescriptor Error deploying configuration descriptor C:\Users\Documents\AppData\Roaming\NetBeans\8.2\apache-tomcat-8.0.27.0_base\conf\Catalina\localhost\springboot_test.xml 
java.lang.IllegalStateException: ContainerBase.addChild: start: org.apache.catalina.LifecycleException: Failed to start component [StandardEngine[Catalina].StandardHost[localhost].StandardContext[/springboot_test]] 
    at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:729)

來源

2016-11-09 Satyadev

不應該調用'http：// localhost：8084/home'嗎？ – Maroun

@MarounMaroun編號因爲調用'http：// localhost：8084/springboot_test /'正在加載默認的index.html頁面，所以我認爲'springboot_test /'後面的任何東西都是調用rest controller – Satyadev

SpringBootTest的包名是什麼上課？添加軟件包詳細信息 – developer

你RestController不是由Spring容器檢測，所以你需要添加到ComponentScan包的細節，所以更改主要如下：

@SpringBootApplication 
@ComponentScan(basePackages = { "com.rsc" }) 
public class SpringBootTest { 
    public static void main(String[] args) { 
    SpringApplication.run(SpringBootTest.class, args); 
    } 
}

此外，爲您的測試應用程序，你不ne編輯任何XML（我們使用的註解並用componentscan掃描組件），好像你已經配置了一個在以下路徑：

C:\Users\Documents\AppData\Roaming\NetBeans\8.2\apache-tomcat-8.0.27.0_base\conf\Catalina\localhost\springboot_test.xml

您需要刪除並重新啓動服務器。

來源

2016-11-09 15:34:16 developer

說得對。但是，我必須爲我在應用程序中定義的所有其餘控制器調用@ ComponentScan'。不能有全局組件掃描？ – Satyadev

是的，現在編輯我的答案檢查，它在SpringBootTest類的頂部 – developer

是的。謝謝 – Satyadev

您的問題是，你的Application類是ComponentScan下。你的項目結構應該是：

src 
    main 
    java 
     com.company 
     Application.java 
     controller 
      MyController.java 
     service 
     repository

您的應用程序：

@SpringBootApplication 
@ComponentScan(basePackages = { 
    "com.rsc.springboot_test_controller", 
    "com.rsc.springboot_test_service", 
    //etc... no ' at the end of the last package 
}) 
public class SpringBootTest { 
    public static void main(String[] args) { 
     SpringApplication.run(SpringBootTest.class, args); 
    } 
}

其實上面是兩種不同的方法混合，但會奏效。請記住，您的Application.java應位於所有其他包的根包中。

並再次閱讀你的問題，我建議改變Controller：

package com.rsc.springboot_test_controller; 
@RestController 
public class testController { 

    @RequestMapping("/home") 
    public String home() { 
     return "@@@Home Controller Called"; 
    } 
}

來源

2016-11-09 15:48:24 xenteros

@SpringBootApplication默認情況下會觸發同一個包註釋類和所有子包組件掃描。

在你的情況下，因爲主類在com.rsc.springboot_test和控制器在com.rsc.springboot_test_controller,TestController類將不會被掃描。

有解決這個問題兩種方式：

推薦：移動TestController到另一個包，以便它默認的classpath掃描相匹配，例如com.rsc.springboot_test.controller
修改@SpringBootApplication掃描其他套餐：

@SpringBootApplication(scanBasePackages = { 
     "com.rsc.springboot_test", 
     "com.rsc.springboot_test_controller" 
})

來源

2016-11-09 23:19:07

使用Spring啓動休息控制器

回答

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