Google App Engine Standard env - 未找到控制器方法 - Spring Boot应用程序 [英] Google App Engine Standard env - not found controller method - Spring Boot app

问题描述

我试图在Google App Engine上部署Spring Boot应用程序（标准环境）。起初，我从这个不错的教程克隆了示例应用程序 https：/ /springframework.guru/spring-boot-web-application-part-4-spring-mvc/

例如，我将 http：// localhost：8080 / products ，并显示包含数据的模板。

所以一切都没有问题，我可以在本地调用所有控制器方法。然后，我决定将它作为实验部署在GAE上。我根据这里的指示调整了pom.xml https://github.com/GoogleCloudPlatform/getting-started-java/tree/master/appengine-standard-java8/springboot-appengine-standard

这意味着我排除了Tomcat依赖性，将jar包更改为war，创建了appengine-web.xml文件等。下一步，我在GAE控制台中创建了GAE项目，并将APP ID复制到appengine-web.xml中。然后我运行了mvn clean package并在目标文件夹中创建了war。

我的应用程序现在部署在此URL https://20180109t135551-dot-oe-gae-test.appspot.com/

如果您尝试它，您将在浏览器中看到Hello World。但是，如果我尝试调用/产品控制器方法，请按照以下方法 https：// 20180109t135551- dot-oe-gae-test.appspot.com/products 我收到未找到错误。

你能否给我建议调用我的控制器方法？我忘了实现类似web.xml servlet映射的东西吗？或者是一些特定的Spring Boot - Google App Engine问题？

我会很感激任何提示。

提前感谢大家

解决方案

关注这一步转换为代码的以下内容：

1. 在pom.xml中，将< packaging> jar< / packaging> 更改为


2. 在包$ guru.springframework 添加此类：

代码：

  package guru.springframework; 
 
 import org.springframework.boot.SpringApplication; 
 import org.springframework.boot.autoconfigure.SpringBootApplication; 
 
 @SpringBootApplication 
 public class SpringBootWebApplication {
 
 public static void main（String [] args）{
 SpringApplication.run（SpringBootWebApplication.class，args ）; 
 
 
  

3. 删除Tomcat Starter：

在POM中查找此依赖项：

 <依赖项> 
< groupId> org.springframework.boot< / groupId> 
< artifactId> spring-boot-starter-web< / artifactId> 
< /依赖关系> 
  

然后添加以下几行：

 < dependency> 
< groupId> org.springframework.boot< / groupId> 
< artifactId> spring-boot-starter-web< / artifactId> 
<排除项> 
<排除> 
< groupId> org.springframework.boot< / groupId> 
< artifactId> spring-boot-starter-tomcat< / artifactId> 
< /排除> 
< /排除> 
< /依赖关系> 
  

4. 排除Jetty依赖关系并包含Servlet API依赖关系：
   
   

   < dependency>
< groupId> javax.servlet< / groupId>
< artifactId> javax.servlet-api< / artifactId>
< version> 3.1.0< / version>
< scope>提供< / scope>
< / dependency>




5. 添加App Engine标准插件：
   
   

    < plugin> 
   < groupId> com.google.cloud.tools< / groupId> 
   < artifactId> appengine-maven-plugin< / artifactId> 
   < version> 1.3.1< / version> 
   < / plugin> 
     

   
   
   

   
   
   6. 添加名为
   
   中的包含在 src / webapp / WEB-INF
   
   

   < appengine-web-app xmlns =http://appengine.google.com/ns/1.0>
< threadsafe> true< / threadsafe>
< runtime> java8< / runtime>
< / system-properties>


   
   
   7. SLF4J Bridge通过在pom中定位这个依赖关系：
      

   < dependency>
< groupId> org.springframework.boot< / groupId>
< artifactId> spring-boot-starter-data-jpa< / artifactId>
< / dependency>

   
   

   / p>
   
   

    < dependency> 
   < groupId> org.springframework.boot< / groupId> 
   < artifactId> spring-boot-starter-data-jpa< / artifactId> 
   <排除项> 
   <排除> 
   < groupId> org.slf4j< / groupId> 
   < artifactId> jul-to-slf4j< / artifactId> 
   < /排除> 
   < /排除> 
   < /依赖关系> 
     

   
   
   

   
   
   8. 避免内存不足错误：
   
   

   在 src / main / resources 中添加一个logging.properties文件：

     .level = INFO 
     

   和内部 src / main / webapp / WEB-INF / appengine-web.xml 粘贴：
   
   

    <系统-性状> 
   < property name =java.util.logging.config.filevalue =WEB-INF / classes / logging.properties/> 
   < / system-properties> 
     

   编辑：
   
   

   对于步骤 3 和 7 ，你也可以进入项目浏览器（如果你使用Eclipse ）并导航到库 - > Maven依赖关系并单独选择每个库（ jul-to-slf4j-1.7.25 和 spring-boot-starter-tomcat-1.5.3.RELEASE 在我的情况）。右键单击每个库，然后转到 Maven - >排除Maven工件 ...，然后单击确定。这将对编辑中的POM产生相同的效果。

   
   

   I was trying to deploy Spring Boot application on Google App Engine (standard environment). At first I cloned example app from this nice tutorial https://springframework.guru/spring-boot-web-application-part-4-spring-mvc/

   For example I called http://localhost:8080/products and template with data was displayed.

   So everything ran without problems, I was able to call all controller methods locally. Then I decided as experiment to deploy it on GAE. I adjusted pom.xml according to instructions from here https://github.com/GoogleCloudPlatform/getting-started-java/tree/master/appengine-standard-java8/springboot-appengine-standard

   It means I excluded Tomcat dependency, changed packaging from jar to war, created appengine-web.xml file etc. As next step, I created GAE project in GAE console and copied APP ID into appengine-web.xml. Then I ran mvn clean package and war was created in target folder. Finally I started with GAE deployment and it also went smoothly without errors.

   My app is now deployed on this URL https://20180109t135551-dot-oe-gae-test.appspot.com/

   If you try it, you will see Hello World in browser. But if I try to call /products controller method like this https://20180109t135551-dot-oe-gae-test.appspot.com/products I get "not found" error.

   Can you give me advice on which URL should I call my controller methods? Did I forget to implement something like web.xml servlet mapping? Or is it some specific Spring Boot - Google App Engine problem?

   I will be grateful for any hint.

   Thank you all in advance

   解决方案

   Following this steps translates into the following for the code:

   1. In pom.xml, change <packaging>jar</packaging> to <packaging>war</packaging>

   2. In the package guru.springframework add this class:

   Code:

   package guru.springframework;
   
   import org.springframework.boot.SpringApplication;
   import org.springframework.boot.autoconfigure.SpringBootApplication;
   
   @SpringBootApplication
   public class SpringBootWebApplication {
   
   public static void main(String[] args) {
           SpringApplication.run(SpringBootWebApplication.class, args);
       }
   }    
   

   3. Remove Tomcat Starter:

   Find this dependency in the POM:

       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
       </dependency>
   

   And add these lines:

       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-web</artifactId>
           <exclusions>
               <exclusion>
                   <groupId>org.springframework.boot</groupId>
                   <artifactId>spring-boot-starter-tomcat</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
   

   4. Exclude Jetty dependencies and include the Servlet API dependency:

      <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency>

   5. Add the App Engine Standard plugin:

      <plugin>
          <groupId>com.google.cloud.tools</groupId>
          <artifactId>appengine-maven-plugin</artifactId>
          <version>1.3.1</version>
      </plugin>
      

      6. Add a file called appengine-web.xml in src/webapp/WEB-INF with these contents:

      <appengine-web-app xmlns="http://appengine.google.com/ns/1.0"> <threadsafe>true</threadsafe> <runtime>java8</runtime> </system-properties> </appengine-web-app>

      7. Exclude JUL to SLF4J Bridge by locating this dependency in the pom:

      <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-jpa</artifactId> </dependency>

   and modifying it this way:

       <dependency>
           <groupId>org.springframework.boot</groupId>
           <artifactId>spring-boot-starter-data-jpa</artifactId>
           <exclusions>
               <exclusion>
                   <groupId>org.slf4j</groupId>
                   <artifactId>jul-to-slf4j</artifactId>
               </exclusion>
           </exclusions>
       </dependency>
   

   8. Avoiding out of memory errors:

   In src/main/resources add a logging.properties file with:

   .level = INFO
   

   and inside src/main/webapp/WEB-INF/appengine-web.xml paste this:

   <system-properties>
       <property name="java.util.logging.config.file" value="WEB-INF/classes/logging.properties" />
   </system-properties>
   

   EDIT:

   For steps 3 and 7 you can also go to the project explorer (in case you're using Eclipse) and navigate to Libraries -> Maven dependencies and select each library individually (jul-to-slf4j-1.7.25 and spring-boot-starter-tomcat-1.5.3.RELEASE in my case). Right click on each library and go to Maven -> Exclude Maven artifact... And click Ok. This will have the same effect on the POM as editing.

   这篇关于Google App Engine Standard env - 未找到控制器方法 - Spring Boot应用程序的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！