MongoDB入门

第一：mongo依赖

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

第二：mongo配置

server:
  port: 9998
spring:
  data:
    mongodb:
      host: 192.168.140.100
      port: 27017
      database: green-history

 第三：映射

import lombok.Data;
import org.springframework.data.mongodb.core.mapping.Document;

import java.io.Serializable;
import java.util.Date;

/**
 * <p>
 * 联想词表
 * </p>
 *
 * @author itheima
 */
@Data
@Document("ap_associate_words")
public class ApAssociateWords implements Serializable {

    private static final long serialVersionUID = 1L;

    private String id;

    /**
     * 联想词
     */
    private String associateWords;

    /**
     * 创建时间
     */
    private Date createdTime;

}

核心方法

@SpringBootTest(classes = MongoApplication.class)
@RunWith(SpringRunner.class)
public class MongoTest {


    @Autowired
    private MongoTemplate mongoTemplate;

    //保存
    @Test
    public void saveTest(){
        for (int i = 0; i < 10; i++) {
            ApAssociateWords apAssociateWords = new ApAssociateWords();
            apAssociateWords.setAssociateWords("MongoDB入门");
            apAssociateWords.setCreatedTime(new Date());
            mongoTemplate.save(apAssociateWords);
        }
    }

    //查询一个
    @Test
    public void saveFindOne(){
        ApAssociateWords apAssociateWords = mongoTemplate.findById("65bbac06cf54d73f36b16e59", ApAssociateWords.class);
        System.out.println(apAssociateWords);
    }

    //条件查询
    @Test
    public void testQuery(){
        Query query = Query.query(Criteria.where("associateWords").is("MongoDB入门"))
                .with(Sort.by(Sort.Direction.DESC,"createdTime"));
        List<ApAssociateWords> apAssociateWordsList = mongoTemplate.find(query, ApAssociateWords.class);
        System.out.println(apAssociateWordsList);
    }

    //删除
    @Test
    public void testDel(){
        mongoTemplate.remove(Query.query(Criteria.where("associateWords").is("MongoDB入门")),ApAssociateWords.class);
    }
}