1.导入maven依赖
<!-- https://mvnrepository.com/artifact/org.mongodb/mongo-java-driver -->
<dependency>
<groupId>org.mongodb</groupId>
<artifactId>mongo-java-driver</artifactId>
<version>3.12.1</version>
</dependency>
2.编写测试类
package com.diploma.person;
import com.mongodb.BasicDBObject;
import com.mongodb.MongoClient;
import com.mongodb.client.FindIterable;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import org.bson.Document;
import org.bson.conversions.Bson;
import org.junit.Before;
import org.junit.Test;
import java.util.HashMap;
public class JavaOptMongdbDB {
MongoCollection<Document> collection;
@Before
public void init(){
MongoClient mongoClient = new MongoClient("49.235.227.178", 27017);
MongoDatabase database = mongoClient.getDatabase("test");
collection = database.getCollection("col");
}
@Test
public void add(){
HashMap<String, Object> map = new HashMap<>();
map.put("uid","1060");
map.put("name","大哈皮");
map.put("content","大哈皮,哈哈哈哈哈");
Document document = new Document(map);
collection.insertOne(document);
}
@Test
public void deleteAll(){
Bson bson =new BasicDBObject() ;
collection.deleteMany(bson);
}
@Test
public void findAll(){
FindIterable<Document> documents = collection.find();
for (Document document : documents) {
System.out.println("用户id:"+document.getString("uid"));
System.out.println("用户年龄:"+document.getInteger("uage"));
System.out.println("内容:"+document.getString("content"));
}
}
@Test
public void findById(){
BasicDBObject bson = new BasicDBObject("uid", new BasicDBObject("$gt",1000));
FindIterable<Document> documents = collection.find(bson);
for (Document document : documents) {
System.out.println("用户id:"+document.getString("uid"));
System.out.println("用户年龄:"+document.getInteger("uage"));
System.out.println("内容:"+document.getString("content"));
}
}
}