使用 elasticSearch 和 Spring Boot 创建 bean 时出错

Question

我想将我的项目连接到弹性搜索。我收到以下错误：

com.example.demo.elasticsearch.controller.Controller 中的字段存储库需要一个无法找到的“com.example.demo.elasticsearch.repository.CustomerRepository”类型的 bean。

注入点有以下注解： - @org.springframework.beans.factory.annotation.Autowired(required=true)

行动：

Consider defining a bean of type 'com.example.demo.elasticsearch.repository.CustomerRepository' in your configuration.

2020-07-29 15:43:44.525  WARN 14432 --- [           main] o.s.boot.SpringApplication               : Unable to close ApplicationContext

org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'springApplicationAdminRegistrar' defined in class path resource [org/springframework/boot/autoconfigure/admin/SpringApplicationAdminJmxAutoConfiguration.class]: Unsatisfied dependency expressed through method 'springApplicationAdminRegistrar' parameter 1; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.core.env.Environment' available: expected at least 1 bean which qualifies as autowire candidate. Dependency annotations: {}
    at org.springframework.beans.factory.support.ConstructorResolver.createArgumentArray(ConstructorResolver.java:798) ~[spring-beans-5.2.6.RELEASE.jar:5.2.6.RELEASE]

所以我构建了一些类，如下所示：

Controller.java

package com.example.demo.elasticsearch.controller;

import com.example.demo.elasticsearch.model.Customer;
import com.example.demo.elasticsearch.repository.CustomerRepository;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;

import java.util.List;

@org.springframework.stereotype.Controller
public class Controller {

    @Autowired
    private CustomerRepository repository;

    @PostMapping("/saveCustomer")
    public int saveCustomer(@RequestBody List<Customer> customers) {
        repository.saveAll(customers);
        return customers.size();
    }

    @GetMapping("/findAll")
    public Iterable<Customer> findAllCustomers() {
        return repository.findAll();
    }

    @GetMapping("/findByFName/{firstName}")
    public List<Customer> findByFirstName(@PathVariable String firstName) {
        return repository.findByFirstname(firstName);
    }
}

客户.java

package com.example.demo.elasticsearch.model;


import lombok.AllArgsConstructor;
import lombok.Data;
import lombok.NoArgsConstructor;
import org.springframework.data.annotation.Id;
import org.springframework.data.elasticsearch.annotations.Document;

@Document(indexName = "javatechie", type = "customer", shards = 2)
@Data
@AllArgsConstructor
@NoArgsConstructor

public class Customer {

    @Id
    private String id;
    private String firstname;
    private String lastname;
    private int age;

}

CustomerRepository.java

package com.example.demo.elasticsearch.repository;


import com.example.demo.elasticsearch.model.Customer;
import org.springframework.data.elasticsearch.repository.ElasticsearchRepository;
import org.springframework.stereotype.Repository;

import java.util.List;

@Repository

public interface CustomerRepository extends ElasticsearchRepository<Customer, String> {

    List<Customer> findByFirstname(String firstName);

}

构建.gradle

// https://mvnrepository.com/artifact/org.springframework.data/spring-data-elasticsearch
    compile group: 'org.springframework.data', name: 'spring-data-elasticsearch', version: '1.0.0.RELEASE'

 dependencies {
        classpath "org.elasticsearch.gradle:build-tools:6.5.4"
    }

Answer 1

你有没有像下面这样的 bean 创建配置类

@Configuration
@EnableElasticsearchRepositories(basePackages = "com.example.demo.elasticsearch.repository")
public class Config {
 
    @Bean
    public RestHighLevelClient client() {
        ClientConfiguration clientConfiguration 
            = ClientConfiguration.builder()
                .connectedTo("localhost:9200")
                .build();
 
        return RestClients.create(clientConfiguration).rest();
    }
 
    @Bean
    public ElasticsearchOperations elasticsearchTemplate() {
        return new ElasticsearchRestTemplate(client());
    }
}

如果没有，请尝试这样。 并检查您正在使用的 spring-data-elasticsearch 的版本（我认为 1.0.0.RELEASE 太旧了）