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

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

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'):" );