无法命中 Rest Controller Spring 开机

Question

I have below pom.xml in the SpringBoot application. While running the application, I am not facing any errors. But when I am hitting the URL through postman or browser, then my java code present inside controller is not getting executed.

pom.xml:

<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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.example</groupId>
  <artifactId>MENU-RIGHT</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>jar</packaging>
  
  <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.3.1.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>
        <maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
    </properties>
  
  <dependencies>
    <dependency>
        <groupId>mysql</groupId>
        <artifactId>mysql-connector-java</artifactId>
        <version>8.0.26</version>
    </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-web</artifactId>
    </dependency>

    <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-devtools</artifactId>
            <scope>runtime</scope>
    </dependency>
    <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
    </dependency>
  </dependencies>

</project>

Controller:

package com.example.controller;

import java.util.logging.Logger;

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

import com.example.model.MenuRightModel;
import com.example.service.MenuRightService;

@RestController
public class MenuRightController {

    Logger logger = Logger.getAnonymousLogger();
    @Autowired
    private MenuRightService menuRightService;
    
    @RequestMapping(value  = "/getRightByUser/{id}", method=RequestMethod.GET)
    public MenuRightModel findRightByUser(@PathVariable("id") int id) {
        logger.info("Request Received for User Id : "+id);
        return menuRightService.findRightByUser(id);
        
    }
    @RequestMapping(value  = "/getRightAll", method=RequestMethod.GET)
    public MenuRightModel findAllRight() {
        return new MenuRightModel();
        
    }
}

Project Execution Screenshot:

Postman Execution Screenshot:

Spring Boot Application Class:

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.context.annotation.ComponentScan;

@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class })
@ComponentScan("src/main/java")
public class MenuRightApplication {

    public static void main(String[] args) {
    
        SpringApplication.run(MenuRightApplication.class, args);
    }
}

Spring Boot Repository Class:

package com.dbs.repository;

import org.springframework.stereotype.Repository;

import com.example.model.MenuRightModel;
import org.springframework.data.jpa.repository.JpaRepository;

@Repository
public interface MenuRightRepository extends JpaRepository<MenuRightModel, Integer>{
    MenuRightModel findByUserId(int id);
}

After Adding BasePackage as com.example facing below Exception:

2022-03-21 09:51:35.169 WARN 20560 --- [ restartedMain] ConfigServletWebServerApplicationContext: Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'menuRightController': Unsatisfied dependency expressed through field 'menuRightService'; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'menuRightServiceImpl': Unsatisfied dependency expressed through field 'menuRightRepository'; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'com.example.repository.MenuRightRepository' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {@org.springframework.beans.factory.annotation.Autowired(required=true)} 2022-03-21 09:51:35.172 INFO 20560 --- [ restartedMain] o.apache.catalina.core.StandardService: Stopping service [Tomcat] 2022-03-21 09:51:35.189 INFO 20560 --- [ restartedMain] ConditionEvaluationReportLoggingListener:

Error starting ApplicationContext. To display the conditions report re-run your application with 'debug' enabled. 2022-03-21 09:51:35.312 ERROR 20560 --- [ restartedMain] osbdLoggingFailureAnalysisReporter:

---

APPLICATION FAILED TO START

---

Description:

Field menuRightRepository in com.example.service.impl.MenuRightServiceImpl required a bean of type 'com.example.repository.MenuRightRepository' that could not be found.

The injection point has the following annotations: - @org.springframework.beans.factory.annotation.Autowired(required=true)

Action:

Consider defining a bean of type 'com.example.repository.MenuRightRepository' in your configuration.

Answer 1

I am sure it is your main class configuration issue. By default, framework will scan beans in same package as of main class and sub-packages. eg below will not work

com/example/controller/FooController.java

com/example/main/MainClass.java

as applciation will scan for beans in com.example.main package and its subpackages only.

If that is case, you will need to update 'scanBasePackages' attribute of @SpringBootApplication annotation.

Answer 2

You need to add a package name in the component scan, in your case, it is @ComponentScan("com.example.controller"), Standard way to create other packages is under the main root package