Controller中构造函数的参数0需要一个找不到服务类类型的bean

Question

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申请无法开始

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说明：

无法找到edu.rohit.circuitbreakclient.controller.CircuitBreakerController中的构造函数的参数0，无法找到类型为'edu.rohit.circuitbreakclient.service.CircuitBreakerService $ BookService'的bean。

动作：

考虑在您的配置中定义类型为'edu.rohit.circuitbreakclient.service.CircuitBreakerService $ BookService'的bean。

尝试过@服务@零件@SpringBootApplication（scanBasePackages = {“ edu.rohit.circuitbreakclient.service”，“ edu.rohit.circuitbreakclient.controller”}）

//CircuitBreakerClientApplication 
package edu.rohit.circuitbreakclient;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;

@EnableCircuitBreaker
@SpringBootApplication(scanBasePackages= {"edu.rohit.circuitbreakclient.service", "edu.rohit.circuitbreakclient.controller"})
public class CircuitBreakerClientApplication {

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

}

//CircuitBreakerController
package edu.rohit.circuitbreakclient.controller;

 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.bind.annotation.CrossOrigin;
 import org.springframework.web.bind.annotation.RequestMapping;
 import org.springframework.web.bind.annotation.RestController;
 import edu.rohit.circuitbreakclient.service.CircuitBreakerService.BookService;
@RestController
@CrossOrigin
@RequestMapping("/read")
public class CircuitBreakerController {

BookService bookService;

@Autowired
CircuitBreakerController(BookService bs){
    this.bookService=bs;
}

@RequestMapping("/get")
public String toRead() {
    return bookService.readingList();
  }

}

//BookingService
package edu.rohit.circuitbreakclient.service;

import java.net.URI;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
import com.netflix.hystrix.contrib.javanica.annotation.HystrixCommand;

public class CircuitBreakerService {

//@Service
@Component
public class BookService {

  private final RestTemplate restTemplate;

  public BookService(RestTemplate rest) {
    this.restTemplate = rest;
  }

  @HystrixCommand(fallbackMethod = "reliable")
  public String readingList() {
    URI uri = URI.create("http://localhost:8060/recommended");

    return this.restTemplate.getForObject(uri, String.class);
  }

  public String reliable() {
    return "Cloud not navigate to Circuit Breaker Server";
  }

}

}

//pom
<?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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>


<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.2.0.RELEASE</version>
    <relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>edu.rohit</groupId>
<version>1</version>
<description>Demo project for Spring Boot CircuitBreakerClient</description>

<properties>
    <java.version>1.8</java.version>
    <spring-cloud.version>2.1.3.RELEASE</spring-cloud.version>
</properties>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-actuator</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-thymeleaf</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        <version>${spring-cloud.version}</version>
    </dependency>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
        <version>${spring-cloud.version}</version>
    </dependency>

    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
        <scope>test</scope>
        <exclusions>
            <exclusion>
                <groupId>org.junit.vintage</groupId>
                <artifactId>junit-vintage-engine</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
</dependencies>

<!-- <dependencyManagement>
    <dependencies>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-dependencies</artifactId>
            <version>${spring-cloud.version}</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
    </dependencies>
</dependencyManagement> -->

<build>
    <plugins>
        <plugin>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-maven-plugin</artifactId>
        </plugin>
    </plugins>
</build>

<repositories>
    <repository>
        <id>spring-milestones</id>
        <name>Spring Milestones</name>
        <url>https://repo.spring.io/milestone</url>
    </repository>
</repositories>

<artifactId>CircuitBreakerClient</artifactId>
<name>CircuitBreakerClient</name>
</project>

//application.properties
server.port=8061
hystrix.command.default.circuitBreaker.requestVolumeThreshold=20
hystrix.command.default.circuitBreaker.sleepWindowInMilliseconds=500

Answer 1