沒有可用的名為“mongoTemplate”的 bean。 Spring 開機 + MongoDB

Question

我正在使用 Spring Boot 和 MongoDB 構建后端，首先我正在創建用戶存儲庫、服務和 controller，並收到此錯誤：

***************************
APPLICATION FAILED TO START
***************************

Description:

Field userRepository in com.package.package.controller.UserController required a bean named 'mongoTemplate' 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 named 'mongoTemplate' in your configuration.

這是代碼：

用戶控制器：

package com.package.package.controller;

import com.package.package.entities.User;
import com.package.package.repositories.UserRepository;
import org.bson.types.ObjectId;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.*;

import javax.validation.Valid;
import java.util.List;

@RestController
@RequestMapping("/users")
public class UserController {
    @Autowired
    private UserRepository userRepository;

    @GetMapping(value = "/")
    public List<User> getAllUsers() {
        return userRepository.findAll();
    }

    @GetMapping(value = "/{id}")
    public User getUserById(@PathVariable("id") ObjectId id) {
        return userRepository.findBy_id(id);
    }

    @PutMapping(value = "/{id}")
    public void modifyUserById(@PathVariable("id") ObjectId id, @Valid @RequestBody User user) {
        user.set_id(id);
        userRepository.save(user);
    }

    @PostMapping(value = "/")
    public User createUser(@Valid @RequestBody User user) {
        user.set_id(ObjectId.get());
        userRepository.save(user);
        return user;
    }

    @DeleteMapping(value = "/{id}")
    public void deleteUser(@PathVariable ObjectId id) {
        userRepository.delete(userRepository.findBy_id(id));
    }
}

用戶資料庫：

package com.package.package.repositories;

import com.package.package.entities.User;
import org.bson.types.ObjectId;
import org.springframework.data.mongodb.repository.MongoRepository;
import org.springframework.stereotype.Repository;

@Repository
public interface UserRepository extends MongoRepository<User, String> {
    User findBy_id(ObjectId _id);
}

用戶服務：

package com.package.package.service;

import com.package.package.entities.User;
import org.bson.types.ObjectId;

import java.util.List;

public interface UserService {
    User save(User user);
    User findbyid(ObjectId _id);
    List<User> getAll();
    void delete(User user);
}

主要應用：

package com.package.package;

import com.package.package.repositories.UserRepository;
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.data.mongodb.repository.config.EnableMongoRepositories;

@SpringBootApplication
@EnableMongoRepositories(basePackageClasses = UserRepository.class)
public class TestApplication {

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

}

我正在使用我過去所做的項目作為參考（不同之處在於這是用 postgres 完成的）。 你想要的任何其他信息，請告訴我。 提前致謝。

更新：這是 pom.xml

<?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>2.3.2.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <groupId>com.wazzka</groupId>
    <artifactId>wazzka</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <name>wazzka</name>
    <description>WazzkaProject</description>

    <properties>
        <java.version>14</java.version>
        <spring.framework.version>5.2.8.RELEASE</spring.framework.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </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>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-mongodb</artifactId>
            <version>3.0.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-releasetrain</artifactId>
            <version>Lovelace-SR9</version>
            <type>pom</type>
            <scope>import</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-commons</artifactId>
            <version>2.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>jakarta.validation</groupId>
            <artifactId>jakarta.validation-api</artifactId>
            <version>2.0.2</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.data</groupId>
            <artifactId>spring-data-jpa</artifactId>
            <version>2.2.3.RELEASE</version>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-data-mongodb</artifactId>
        </dependency>
    </dependencies>

    <repositories>
        <repository>
            <id>spring-milestone</id>
            <name>Spring Maven MILESTONE Repository</name>
            <url>https://repo.spring.io/libs-milestone</url>
        </repository>
    </repositories>

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

</project>

Answer 1

嘗試添加此依賴項：

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

Answer 2

希望這個答案也可以幫助某人。

如果您在代碼塊中的某處有以下帶有參數的注釋，請將其刪除。

exclude = {MongoAutoConfiguration.class} 

例如：之前

@SpringBootApplication(exclude = {MongoAutoConfiguration.class})

后

@SpringBootApplication

Answer 3

雖然在大多數情況下這肯定不是錯誤的原因，但它發生在我身上並且我花了相當多的時間尋找原因讓我想在這里發布“解決方案”。

在我的情況下，我在最初禁用自動配置（application.yml）后忘記再次刪除這些行：

spring.autoconfigure.exclude:
  - org.springframework.boot.autoconfigure.mongo.MongoAutoConfiguration
  - org.springframework.boot.autoconfigure.data.mongo.MongoDataAutoConfiguration

Answer 4

我有

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
    <version>1.5.2.RELEASE</version>
</dependency>

剛剛刪除了版本標簽並且它的工作