spring 引导应用程序 class 是否可以扩展另一个依赖的 spring 引导应用程序 ZA2F2ED4F8EBC2CBB14C21A29ZDC4

Question

I have one spring boot project (jar) as dependent jar in another spring boot application, in the current project/application i dont want to have swagger sort of codes to be written or configured again, so is it possible to extend the spring boot application class from the dependent jar which has those configurations

Answer 1

There is a way to do it but I'd strongly recommend you do not do it. Spring boot applications are packaged differently to standard jars.. they're executable jars with other bits and bobs going on internally. If you plan on running the spring boot jar anywhere other than locally (eg within a container) it is likely to fail.

I'd recommend extracting out the common functionality to a shared module instead and add a dependency on the shared module to each parent module. This works well if you're using Gradle/maven.

Answer 2

Yes for a concept it can be done the following way, just make sure the the version of dependency match to that of one extending it

Project 1

1. Creating a Simple Hello World Spring Web project " projectone " using Spring starter Project

    <groupId>com.harshit</groupId>
    <artifactId>projectone</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>projectone</name>

2. @RestController with following API

    @GetMapping("/one")
    public String helloworld()
    {
        return "Project One Works";
        
    }
    
    @GetMapping("/alone")
    public String checkmethod()
    {
        return "alone method also made its way into the second project";
        
    }

3. Build / run /install. the project on server.port=8081

   mvn clean install

Project 2

1. Creating another Simple Spring Web project " projecttwo " using Spring starter Project

    <groupId>com.demo</groupId>
    <artifactId>projecttwo</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>projecttwo</name>

2. Add the previously created " projectione " as dependency in this project in the pom.xm of this project

        <dependency>
            <groupId>com.harshit</groupId>
            <artifactId>projectone</artifactId>
            <version>0.0.1-SNAPSHOT</version>
            <scope>compile</scope>
        </dependency>

3. Create a @RestController with the following api extending the Controller class of the " projectione "

import com.harshit.controller.Controller;
@RestController
public class anothercontroller  extends Controller{
    
    
    @GetMapping("/two")
    public String hellomultiverse()
    {
        return helloworld();
        
    }
  @GetMapping("/three")
    public String multiverse()
    {
        return "threeworks";
        
    }
    
    @Override
    public String helloworld()
    {
        return "done ";
        
    }
    
    

4. Build / run /install. the project on server.port=9999

mvn clean install

Testing the Extensions

Project	API	Reachable
"projectone" method extended in "projecttwo"	Localhost:9999/alone	YES
"projectone" method extended + overridden in "projecttwo"	Localhost:9999/two	YES
"projecttwo" method	Locahost:9999/three	YES
"projectone" method extended + overridden in "projecttwo"	Localhost:9999/one	YES (Overridden output)