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

来源:互联网 发布:淘宝潮牌男裤店铺推荐 编辑:程序博客网 时间:2024/05/22 04:26

转载请标明出处:
http://blog.csdn.net/forezp/article/details/70941577
本文出自方志朋的博客

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

@SpringBootApplicationpublic 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

参考资料

accessing-data-mongodb

优秀文章推荐:

  • 更多springboot 教程:springBoot非官方教程 | 文章汇总
  • 更多springcoud 教程:史上最简单的 SpringCloud 教程 | 文章汇总
10 3
原创粉丝点击