mongoDB是一个使用非常广的非关系型数据库，在springboot中，可以非常方便的实现CRUD操作。
1.pom配置
目前大多数项目都用maven进行依赖包管理，因此，本文也采用maven进行配置。pom需要增加如下依赖：
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter</artifactId> </dependency> <!-- MongoDB --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-mongodb</artifactId> </dependency> <!-- junit test --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-test</artifactId> <scope>test</scope> </dependency> <!-- lombok --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <version>1.16.10</version> <scope>provided</scope> </dependency>
主要的依赖包有三个：
spring-boot-starter 核心启动包，spring-boot-starter-data-mongodb mongoDB的相关依赖包，spring-boot-starter-test junit单元测试包。
其他的包如 lombok 则是为了省略部分代码。
2.数据模型类
package com.dhb.domain;import org.springframework.data.annotation.Id;import org.springframework.data.mongodb.core.mapping.Document;import lombok.Data;@Document(collection = "users")@Datapublic class User { @Id
private String id;
private String name;
private int age; public User(String name,int age){ this.name = name; this.age = age;
}
}通过lombok的@Data注解，省略了get和set方法。
@Document 表示映射到mongoDB中的表。collection = "users" 通过collection进行指定。
@Id 映射mongoDB中的ID字段。
3.cuid方法Repository
springBoot提供了一个MongoRepository接口，只需要继承该接口即可。亦可自定义方法。
package com.dhb.domain;import org.springframework.data.mongodb.repository.MongoRepository;public interface UserMongoRepository extends MongoRepository<User, Integer> { User findByName(String name);
}4.junit单元测试
测试代码如下：
package com.dhb.test;import static org.junit.Assert.assertEquals;import static org.junit.Assert.assertNotNull;import static org.junit.Assert.assertNull;import org.junit.After;import org.junit.Before;import org.junit.Test;import org.junit.runner.RunWith;import org.springframework.beans.factory.annotation.Autowired;import org.springframework.boot.test.context.SpringBootTest;import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;import com.dhb.domain.User;import com.dhb.domain.UserMongoRepository;@RunWith(SpringJUnit4ClassRunner.class)@SpringBootTestpublic class UserMongoRepositoryTest { @Autowired
private UserMongoRepository userMongoRepository; @Before
public void setUp() throws Exception {
User user1 = new User("user1", 19);
User user2 = new User("user2", 20); // save product, verify has ID value after save
assertNull(user1.getId());
assertNull(user2.getId());// null before save
this.userMongoRepository.save(user1); this.userMongoRepository.save(user2);
assertNotNull(user1.getId());
assertNotNull(user2.getId());
} @Test
public void testFetchData() { /* Test data retrieval */
User userA = userMongoRepository.findByName("user1");
assertNotNull(userA);
assertEquals(19, userA.getAge()); /* Get all products, list should only have two */
Iterable<User> users = userMongoRepository.findAll(); int count = 0; for (User p : users) {
count++;
}
assertEquals(count, 2);
} @Test
public void testDataUpdate() { /* Test update */
User userB = userMongoRepository.findByName("user2");
userB.setAge(40);
userMongoRepository.save(userB);
User userC = userMongoRepository.findByName("user2");
assertNotNull(userC);
assertEquals(40, userC.getAge());
} @After
public void tearDown() throws Exception { this.userMongoRepository.deleteAll();
}
}执行结果：
执行结果
作者：冬天里的懒喵
链接：https://www.jianshu.com/p/40362eb14639