详解springboot整合mongodb
- 作者: 知世ZS
- 来源: 51数据库
- 2020-08-07
本篇文章主要介绍了详解springboot整合mongodb,小编觉得挺不错的,现在分享给大家,也给大家做个参考。一起跟随小编过来看看吧
这篇文章主要介绍springboot如何整合MongoDB。
准备工作
- 安装 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>
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
mongodb设置了密码,这样配置:
spring.data.mongodb.uri=mongodb://name:pass@localhost:27017/dbname
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); } }
数据操作dao层
public interface CustomerRepository extends MongoRepository<Customer, String> { public Customer findByFirstName(String firstName); public List<Customer> findByLastName(String lastName); }
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); } }
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
以上就是本文的全部内容,希望对大家的学习有所帮助,
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