SpringBoot集成MongoDB

原创已于 2022-08-08 23:41:37 修改 · 421 阅读

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文章标签：

#mongodb #spring boot #junit

于 2022-08-05 14:16:34 首次发布

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本文介绍了如何在SpringBoot应用中集成MongoDB，包括添加依赖、配置连接参数、创建实体类，并展示了如何使用MongoTemplate进行CRUD操作。通过实例演示了插入、查询、更新和删除数据的方法。

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SpringBoot集成MongoDB

pom文件


<!-- 继承Spring boot -->
<parent>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-parent</artifactId>
    <version>2.1.5.RELEASE</version>
</parent>

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-web</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-test</artifactId>
    </dependency>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-mongodb</artifactId>
    </dependency>
    <!-- lombok -->
    <dependency>
        <groupId>org.projectlombok</groupId>
        <artifactId>lombok</artifactId>
        <version>1.18.8</version>
    </dependency>
</dependencies>

配置文件：application.properties

spring.data.mongodb.username=username
spring.data.mongodb.password=pwd
spring.data.mongodb.authentication-database=admin
spring.data.mongodb.database=yyy
spring.data.mongodb.port=27017
spring.data.mongodb.host=192.168.200.130

实体类

实体类添加注解@Document与mongodb中的集合对应

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

import java.math.BigDecimal;
import java.util.Date;

/**
 * APP评论信息
 */
@Data
@Document("comment")
public class Comment {
	/**
     * id
     */
    private String id;

    /**
     * 用户ID
     */
    private Integer authorId;

    /**
     * 用户昵称
     */
    private String authorName;
}

使用时，直接注入mongoTemplate

    @Autowired
    private MongoTemplate mongoTemplate;

CRUD

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.data.domain.PageRequest;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.mongodb.core.query.Update;
import org.springframework.test.context.junit4.SpringRunner;

import java.util.List;

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

   @Autowired
   private MongoTemplate mongoTemplate;

   //添加
   @Test
   public void testCreate() {
       for (int i = 0; i < 10; i++) {
           Comment comment = new Comment();
           comment.setContent("这是一个评论");
           comment.setLikes(20+i);
           mongoTemplate.insert(comment);
       }

   }

   //查询一个
   @Test
   public void testFindOne() {
       Comment comment = mongoTemplate.findById("11111", Comment.class);
       System.out.println(comment);
   }

   //条件查询
   @Test
   public void testQuery() {
//        Query query = Query.query(Criteria.where("_id").is("1111111"));
       Query query = Query.query(Criteria.where("likes").lt(28));
       query.with(Sort.by(Sort.Direction.DESC,"likes"));
       Pageable pageable = PageRequest.of(1,3);
       query.with(pageable);
       List<Comment> comments = mongoTemplate.find(query, Comment.class);
       System.out.println(comments);
   }

   //删除
   @Test
   public void testDelete(){
       mongoTemplate.remove(Query.query(Criteria.where("_id").is("1111111")),Comment.class);
   }

   //修改
   @Test
   public void testUpdate(){
       Query query = Query.query(Criteria.where("_id").is("11111"));
       Update update = new Update().set("content","aaaaa");
       mongoTemplate.updateMulti(query,update,Comment.class);
   }

}