MongoDB 整合SpringBoot举例介绍

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

spring:
    data:
      mongodb:
        uri: mongodb://localhost:27017/chat_memory_db # mongodb地址 会自动创建

@Data
@AllArgsConstructor
@NoArgsConstructor
@Document("chat_message")
public class ChatMessages {
    @Id
    private Long messageId;
    /**
     * 聊天记录列表json字符串
     */
    private String content;
}

    @Test
    public void test(){
        ChatMessages chatMessages = new ChatMessages(1L,"你好");
        mongoTemplate.insert(chatMessages);
    }

public void testInsert(){
        ChatMessages chatMessages = new ChatMessages();
        chatMessages.setContent("你好");
        mongoTemplate.insert(chatMessages);
    }
    @Test
    public void testQuery(){
        ChatMessages byId = mongoTemplate.findById("680e38d1eb0e2f7b6d287541", ChatMessages.class);
        System.out.print(byId);
    }
    @Test
    public void testUpdate1(){
        // 根据id修改
        Criteria criteria = Criteria.where("_id").is("680e38d1eb0e2f7b6d287541");
        Query query = new Query(criteria);
        Update update = new Update();
        update.set("content","新的聊天记录");
        // 新增或者更新
        mongoTemplate.upsert(query,update,ChatMessages.class);
    }
    @Test
    public void testUpdate2(){
        // 根据id修改
        Criteria criteria = Criteria.where("_id").is("100");
        Query query = new Query(criteria);
        Update update = new Update();
        update.set("content","新的聊天记录");
        // 新增或者更新
        mongoTemplate.upsert(query,update,ChatMessages.class);
    }
    @Test
    public void testRemove(){
        // 根据id修改
        Criteria criteria = Criteria.where("_id").is("100");
        Query query = new Query(criteria);
        Update update = new Update();
        update.set("content","新的聊天记录");
        // 新增或者更新
        mongoTemplate.remove(query,ChatMessages.class);
    }