SpringBoot非官方教程 | 第八篇：springboot整合mongodb

小灰灰 2022-06-13 08:11 269阅读 0赞

> 转载请标明出处：   
> [http://blog.csdn.net/forezp/article/details/70941577][http_blog.csdn.net_forezp_article_details_70941577]   
> 本文出自[方志朋的博客][Link 1]

这篇文章主要介绍springboot如何整合mongodb。

## 准备工作 ##

*  [安装 MongoDB][MongoDB]
 *  jdk 1.8
 *  maven 3.0
 *  idea

## 环境依赖 ##

在pom文件引入spring-boot-starter-data-mongodb依赖：

<dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-data-mongodb</artifactId>
            </dependency>
    
    
     
      
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## 数据源配置 ##

如果mongodb端口是默认端口，并且没有设置密码，可不配置，sprinboot会开启默认的。

spring.data.mongodb.uri=mongodb://localhost:27017/springboot-db
    
     
      
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mongodb设置了密码，这样配置：

spring.data.mongodb.uri=mongodb://name:pass@localhost:27017/dbname
     
      
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## 定义一个简单的实体 ##

mongodb

package com.forezp.entity;
    
    import org.springframework.data.annotation.Id;
    
    
    public class Customer { 
    
        @Id
        public String id;
    
        public String firstName;
        public String lastName;
    
        public Customer() {}
    
        public Customer(String firstName, String lastName) {
            this.firstName = firstName;
            this.lastName = lastName;
        }
    
        @Override
        public String toString() {
            return String.format(
                    "Customer[id=%s, firstName='%s', lastName='%s']",
                    id, firstName, lastName);
        }
    
    }
    
     
      
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## 数据操作dao层 ##

public interface CustomerRepository extends MongoRepository<Customer, String> { 
    
        public Customer findByFirstName(String firstName);
        public List<Customer> findByLastName(String lastName);
    
    }
    
     
      
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写一个接口，继承MongoRepository，这个接口有了几本的CURD的功能。如果你想自定义一些查询，比如根据firstName来查询，获取根据lastName来查询，只需要定义一个方法即可。注意firstName严格按照存入的mongodb的字段对应。在典型的java的应用程序，写这样一个接口的方法，需要自己实现，但是在springboot中，你只需要按照格式写一个接口名和对应的参数就可以了，因为springboot已经帮你实现了。

## 测试 ##

@SpringBootApplication
    public class SpringbootMongodbApplication implements CommandLineRunner { 
    
    
        @Autowired
        private CustomerRepository repository;
    
        public static void main(String[] args) {
            SpringApplication.run(SpringbootMongodbApplication.class, args);
        }
    
    
        @Override
        public void run(String... args) throws Exception {
            repository.deleteAll();
    
            // save a couple of customers
            repository.save(new Customer("Alice", "Smith"));
            repository.save(new Customer("Bob", "Smith"));
    
            // fetch all customers
            System.out.println("Customers found with findAll():");
            System.out.println("-------------------------------");
            for (Customer customer : repository.findAll()) {
                System.out.println(customer);
            }
            System.out.println();
    
            // fetch an individual customer
            System.out.println("Customer found with findByFirstName('Alice'):");
            System.out.println("--------------------------------");
            System.out.println(repository.findByFirstName("Alice"));
    
            System.out.println("Customers found with findByLastName('Smith'):");
            System.out.println("--------------------------------");
            for (Customer customer : repository.findByLastName("Smith")) {
                System.out.println(customer);
            }
        }
    
    
     
      
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在springboot的应用程序，加入测试代码。启动程序，控制台打印了：

> Customers found with findAll():   
> ——————————-   
> Customer\[id=58f880f589ffb696b8a6077e, firstName=’Alice’, lastName=’Smith’\]   
> Customer\[id=58f880f589ffb696b8a6077f, firstName=’Bob’, lastName=’Smith’\]   
> Customer found with findByFirstName(‘Alice’):   
> ——————————–   
> Customer\[id=58f880f589ffb696b8a6077e, firstName=’Alice’, lastName=’Smith’\]   
> Customers found with findByLastName(‘Smith’):   
> ——————————–   
> Customer\[id=58f880f589ffb696b8a6077e, firstName=’Alice’, lastName=’Smith’\]   
> Customer\[id=58f880f589ffb696b8a6077f, firstName=’Bob’, lastName=’Smith’\]

测试通过。

源码下载：[https://github.com/forezp/SpringBootLearning][https_github.com_forezp_SpringBootLearning]

## 参考资料 ##

[accessing-data-mongodb][]

[http_blog.csdn.net_forezp_article_details_70941577]: http://blog.csdn.net/forezp/article/details/70941577
[Link 1]: http://blog.csdn.net/forezp
[MongoDB]: http://www.runoob.com/mongodb/mongodb-window-install.html
[https_github.com_forezp_SpringBootLearning]: https://github.com/forezp/SpringBootLearning
[accessing-data-mongodb]: https://spring.io/guides/gs/accessing-data-mongodb/