這篇文章主要介紹springboot如何整合MongoDB。
準(zhǔn)備工作
- 安裝 MongoDB
- jdk 1.8
- maven 3.0
- idea
環(huán)境依賴
在pom文件引入spring-boot-starter-data-mongodb依賴：
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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> |
數(shù)據(jù)源配置
如果mongodb端口是默認(rèn)端口，并且沒(méi)有設(shè)置密碼，可不配置，sprinboot會(huì)開(kāi)啟默認(rèn)的。
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spring.data.mongodb.uri=mongodb://localhost:27017/springboot-db |
mongodb設(shè)置了密碼，這樣配置：
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spring.data.mongodb.uri=mongodb://name:pass@localhost:27017/dbname |
定義一個(gè)簡(jiǎn)單的實(shí)體
mongodb
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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); }} |
數(shù)據(jù)操作dao層
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public interface CustomerRepository extends MongoRepository<Customer, String> { public Customer findByFirstName(String firstName); public List<Customer> findByLastName(String lastName);} |
寫(xiě)一個(gè)接口，繼承MongoRepository，這個(gè)接口有了幾本的CURD的功能。如果你想自定義一些查詢，比如根據(jù)firstName來(lái)查詢，獲取根據(jù)lastName來(lái)查詢，只需要定義一個(gè)方法即可。注意firstName嚴(yán)格按照存入的mongodb的字段對(duì)應(yīng)。在典型的Java的應(yīng)用程序，寫(xiě)這樣一個(gè)接口的方法，需要自己實(shí)現(xiàn)，但是在springboot中，你只需要按照格式寫(xiě)一個(gè)接口名和對(duì)應(yīng)的參數(shù)就可以了，因?yàn)閟pringboot已經(jīng)幫你實(shí)現(xiàn)了。
測(cè)試
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@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的應(yīng)用程序，加入測(cè)試代碼。啟動(dòng)程序，控制臺(tái)打印了：
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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'] |
測(cè)試通過(guò)。
源碼下載：https://github.com/forezp/SpringBootLearning
以上就是本文的全部?jī)?nèi)容，希望對(duì)大家的學(xué)習(xí)有所幫助，也希望大家多多支持服務(wù)器之家。
原文鏈接：http://blog.csdn.net/forezp/article/details/70941577
