Java springcloud B2B2C o2o多用戶商城 springcloud架構（八）springboot整合mongodb

準備工做

• 安裝MongoDB
• jdk 1.8
• maven 3.0
• idea

環境依賴

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>

　　

數據源配置

若是mongodb端口是默認端口，而且沒有設置密碼，可不配置，sprinboot會開啓默認的。

1	spring.data.mongodb.uri=mongodb: //localhost:27017/springboot-db

　　mongodb設置了密碼，這樣配置：

1	spring.data.mongodb.uri=mongodb: //name:pass@localhost:27017/dbname

　　

定義一個簡單的實體

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); } }

　　

數據操做dao層

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public interface CustomerRepository extends MongoRepository<Customer, String> { public Customer findByFirstName(String firstName); public List<Customer> findByLastName(String lastName); }

　　

寫一個接口，繼承MongoRepository，這個接口有了幾本的CURD的功能。若是你想自定義一些查詢，好比根據firstName來查詢，獲取根據lastName來查詢，只須要定義一個方法便可。注意firstName嚴格按照存入的mongodb的字段對應。在典型的java的應用程序，寫這樣一個接口的方法，須要本身實現，可是在springboot中，你只須要按照格式寫一個接口名和對應的參數就能夠了，由於springboot已經幫你實現了。

測試

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@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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