Springboot-mongodb的集成以及使用方法

1.引入依賴包

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-mongodb</artifactId>
    <version>2.2.0.RELEASE</version>
</dependency>

2.yml文件配置

spring:
  application:
    name: credit        #服務名稱
  data:
    mongodb:
      uri: mongodb://賬號:密碼@地址:端口/數據庫名
    #  uri: mongodb://name:pass@localhost:27017/test
    #  uri: mongodb://192.168.1.1:20000,192.168.1.2:20000,192.168.252.12:20000/test

3.使用

    集合數據結構

public class TestColl {
    private String _id;
    private String name;
    private String sex;
    private int age;
}

   單元測試demo

package com.lykj.credit;

import com.lykj.credit.bean.TestColl;
import com.mongodb.client.result.UpdateResult;
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.Sort;
import org.springframework.data.mongodb.core.CollectionOptions;
import org.springframework.data.mongodb.core.MongoTemplate;
import org.springframework.data.mongodb.core.aggregation.Aggregation;
import org.springframework.data.mongodb.core.aggregation.AggregationResults;
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 org.springframework.test.context.web.WebAppConfiguration;
import java.util.List;
import java.util.Map;

/**
 * @version 0.4
 * @describe:
 * @author: houkai
 * @Date: 2019/11/20 16:52
 */
@RunWith(SpringRunner.class)
@SpringBootTest(classes = CreditApplication.class)
@WebAppConfiguration
public class MongoTest {
    @Autowired
    private MongoTemplate mongoTemplate;

    /**創建集合*/
    @Test
    public void collTest() {
        //創建集合
        CollectionOptions collectionOptions = new CollectionOptions(102400L, 1000000L, false);
        mongoTemplate.createCollection("collTest", collectionOptions);
        //刪除集合
        mongoTemplate.dropCollection("collTest");
    }

    /** 新增文檔*/
    @Test
    public void insertTest() {
        TestColl testColl = new TestColl();
        testColl.setAge(19);
        testColl.setName("藏嗚嗚");
        testColl.setSex("女");
        TestColl result = mongoTemplate.insert(testColl, "testColl");
        System.out.printf(result.toString());
    }

    /**更新文檔*/
    @Test
    public void updateTest() {
        Query query = new Query(Criteria.where("name").is("藏嗚嗚"));
        Update update = new Update().set("age", 99).set("sex", "男");
        //更新查詢返回結果集的第一條
        UpdateResult result = mongoTemplate.updateFirst(query, update, "testColl");
        System.out.printf("匹配行數：" + result.getMatchedCount() + "修改行數：" + result.getModifiedCount());

        //更新查詢返回結果集的所有
        mongoTemplate.updateMulti(query, update, "testColl");
    }

    /**刪除文檔*/
    @Test
    public void deleteTestById() {
        Query query = new Query(Criteria.where("_id").is("5ddb3295d7e36bfaf1dd0054"));
        mongoTemplate.remove(query, MongoTest.class);
    }

    /**查詢文檔 */
    @Test
    public void findTestByName() {
        Query query = new Query(Criteria.where("name").is("zhangsan"));
        TestColl mgt = mongoTemplate.findOne(query, TestColl.class, "testColl");
        System.out.printf(mgt.toString());
    }

    /**count 查詢*/
    @Test
    public void countTest() {
        Query query = new Query();
        long result = mongoTemplate.count(query, TestColl.class, "testColl");
        System.out.printf(result + "");
    }

    /**分頁查詢*/
    @Test
    public void pageTest() {
        int page = 0;
        int size = 10;
        page = (page -1) < 0 ? 0: page -1;
        Query query = new Query().skip(page * size).limit(size);
        List<TestColl> list = mongoTemplate.find(query, TestColl.class, "testColl");
        long totalSize = mongoTemplate.count(new Query(), TestColl.class, "testColl");
        System.out.println("result:" + list.toString());
        System.out.println("count:" + totalSize);
    }

    /**排序查詢*/
    @Test
    public void sortTest(){
        Query query = new Query();
        query.with(Sort.by(new Sort.Order(Sort.Direction.DESC, "age")));
        List<TestColl> testColls = mongoTemplate.find(query, TestColl.class,"testColl");
        System.out.printf(testColls.toString());
    }

    /** 聚合查詢 */
    @Test
    public void aggregationTest(){
        String alias = "nowNum";
        Aggregation aggregation = Aggregation.newAggregation(
                Aggregation.match(Criteria.where("name").is("ss")),
                Aggregation.group("age").count().as(alias)
        );
        AggregationResults<Map> results= mongoTemplate.aggregate(aggregation, "testColl", Map.class);
        List<Map> mappedResults = results.getMappedResults();
        if (mappedResults != null && mappedResults.size() > 0) {
            Integer num = (Integer) mappedResults.get(0).get(alias);
            System.out.printf("num:" + num);
        }
    }
}