springboot整合MongoDB

依赖

        
            org.springframework.boot
            spring-boot-starter-test
            2.6.10
        

        
            org.springframework.boot
            spring-boot-starter-data-mongodb
            2.6.10
        
    

配置文件

spring:
  data:
    mongodb:  #用上面这种查询报错，只能用下面那种
#      host: 192.168.208.139
#      port: 27017
#      database: test
#      username: root
#      password: 123456
      uri: mongodb://root:[email protected]:27017/test?authSource=admin&authenticationMechanism=SCRAM-SHA-1

bean

package com.cyz.bean;

/**
 * @author cyz
 * @date 2023/7/26 17:07
 * @mood happy
 */
public class Stu {
    String _id;
    String name;
    String age;
    String gender;

    public String get_id() {
        return _id;
    }

    public void set_id(String _id) {
        this._id = _id;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAge() {
        return age;
    }

    public void setAge(String age) {
        this.age = age;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }
}

package com.cyz.bean;

/**
 * @author cyz
 * @date 2023/7/26 17:10
 * @mood happy
 */
public class Person {
    String name;
    String gender;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getGender() {
        return gender;
    }

    public void setGender(String gender) {
        this.gender = gender;
    }
}

查询操作

package com.cyz;

import com.cyz.bean.Stu;
import org.junit.jupiter.api.Test;
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 java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


/**
 * @author cyz
 * @date 2023/7/26 16:16
 * @mood happy
 */
@SpringBootTest
public class TestApplication {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Test
    void query() {
        //  查询name=zs
        Query query = Query.query(Criteria.where("name").is("cyz"));
        //要想使用下面的方法就必须stu的属性和数据库中的某个文档一模一样才行，否则就查询不到数据
        mongoTemplate.find(query, Stu.class);
        //下面的方法是如果使用的是map接收就会查询所以的字段，如果指定某个bean接收，则只会给匹配上的字段赋值
        mongoTemplate.find(query, Map.class, "stu");
        //  查询所有
        //要想使用下面的方法就必须stu的属性和数据库中的某个文档一模一样才行，否则就查询不到数据
        mongoTemplate.findAll(Stu.class);
        //下面的方法是如果使用的是map接收就会查询所以的字段，如果指定某个bean接收，则只会给匹配上的字段赋值
        mongoTemplate.findAll(Map.class, "stu");

        //  分页查询	page页码，pageSize每页展示几个
        Integer page = 2;
        Integer pageSize = 2;
        Pageable pageable = PageRequest.of(page - 1, pageSize, Sort.by(Sort.Order.desc("age")));
        Query query1 = new Query().with(pageable);
        mongoTemplate.find(query1, Stu.class, "stu");

        //  查询多个
        Query query2 = Query.query(Criteria.where("_id").in("64c0d51a682e0000ed002883", "64c0d543682e0000ed002884")).with(Sort.by(Sort.Order.desc("age")));
        mongoTemplate.find(query2, Stu.class);

        //  查询数量
        Query query3 = Query.query(Criteria.where("_id").in("64c0d51a682e0000ed002883", "64c0d543682e0000ed002884")).with(Sort.by(Sort.Order.desc("age")));
        mongoTemplate.count(query3, Stu.class);

    }

}

添加操作

package com.cyz;

import com.cyz.bean.Stu;
import org.junit.jupiter.api.Test;
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 java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


/**
 * @author cyz
 * @date 2023/7/26 16:16
 * @mood happy
 */
@SpringBootTest
public class TestApplication {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Test
    void add() {
        List list = new ArrayList<>();
        Stu stu = new Stu();//
        stu.setName("admin");
        stu.setAge("12");
        list.add(stu);
        //如下两种方法bean的属性必须和文档一致
        mongoTemplate.save(stu);
        mongoTemplate.insert(stu);
        //如下两种方法bean的属性不需要文档一致，如果字段多了就会在文档中创建新的字段
        Map map = new HashMap();
        map.put("name", "map1");
        map.put("age", "323");
        map.put("host", "host");
        mongoTemplate.save(map, "stu");
        mongoTemplate.insert(map, "stu");
        //如下两种方法bean的属性必须和文档一致
        mongoTemplate.save(list);
        mongoTemplate.insert(list);
        //如下两种方法bean的属性不需要文档一致，如果字段多了就会在文档中创建新的字段
        mongoTemplate.save(list, "stu");
        mongoTemplate.insert(list, "stu");
        //根据stu属性去数据库中匹配对应的文档，如果没有就就会创建对应的文档，并且要把集合中的字段如果在文档中没有就会创建对应字段
        mongoTemplate.insert(list, Stu.class);
    }

}

更新操作

package com.cyz;

import com.cyz.bean.Stu;
import org.junit.jupiter.api.Test;
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 java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


/**
 * @author cyz
 * @date 2023/7/26 16:16
 * @mood happy
 */
@SpringBootTest
public class TestApplication {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Test
    void update() {
        Query query = Query.query(Criteria.where("_id").is("64c0d51a682e0000ed002883"));
        Update update = Update.update("name", "zs");
//  更新一条数据
        mongoTemplate.updateFirst(query, update, Stu.class);
        mongoTemplate.updateFirst(query, update, "stu");
        mongoTemplate.updateFirst(query, update, Stu.class, "stu");
//  更新多条数据
        mongoTemplate.updateMulti(query, update, Stu.class);
        mongoTemplate.updateMulti(query, update, "stu");
        mongoTemplate.updateMulti(query, update, Stu.class, "stu");
//  更新数据，如果数据不存在就新增
        mongoTemplate.upsert(query, update, Stu.class);
        mongoTemplate.upsert(query, update, "stu");
        mongoTemplate.upsert(query, update, Stu.class, "stu");
    }

}

删除操作

package com.cyz;

import com.cyz.bean.Stu;
import org.junit.jupiter.api.Test;
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 java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;


/**
 * @author cyz
 * @date 2023/7/26 16:16
 * @mood happy
 */
@SpringBootTest
public class TestApplication {

    @Autowired
    private MongoTemplate mongoTemplate;

    @Test
    void delete() {
        Stu stu = new Stu();
        stu.set_id("64c0d51a682e0000ed002883");
        Query query = Query.query(Criteria.where("_id").in("5d1312aeb1829c279c6c256b", "5d13133ab1829c29d02ce29c"));
        //  根据条件删除
        mongoTemplate.remove(query);
        mongoTemplate.remove(stu);
        mongoTemplate.remove(Stu.class);
        //  根据条件删除（可删除多条）
        mongoTemplate.remove(query, Stu.class, "stu");
    }
}