Java springcloud B2B2C o2o多用户商城 springcloud架构（八）springboot整合mongodb

准备工做

• 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：

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<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency>

　　

数据源配置

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

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

　　mongodb设置了密码，这样配置：

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

　　

定义一个简单的实体

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); } }

　　

数据操做dao层

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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。若是你想自定义一些查询，好比根据firstName来查询，获取根据lastName来查询，只须要定义一个方法便可。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，须要本身实现，可是在springboot中，你只须要按照格式写一个接口名和对应的参数就能够了，由于springboot已经帮你实现了。

测试

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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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