Java MongoDB数据库连接方法梳理

<!-- mongodb链接驱动 -->
<dependency>
   <groupId>org.mongodb</groupId>
   <artifactId>mongodb-driver-sync</artifactId>
   <version>3.6.4</version>
</dependency>
<!-- Google Gson -->
<dependency>
   <groupId>com.google.code.gson</groupId>
   <artifactId>gson</artifactId>
   <version>2.8.2</version>
</dependency>

public class Test01 {
	public static void main(String[] args) {
		//查找
		//获取对象
		MongoClient mc =new MongoClient("localhost",27017);
		//打印
		System.out.println(mc);
        //获取库对象
		MongoDatabase db = mc.getDatabase("myschoolxxx");
		//获取库中表的集合
		MongoIterable<String> iterable = db.listCollectionNames();
		MongoCursor<String> iterator = iterable.iterator();
		while (iterator.hasNext()) {
			System.out.println(iterator.next());
			System.out.println("wod");
		}
        mc.close();
	}
}

package com.ape.conn;
import java.util.Date;
import org.bson.Document;
import com.ape.bean.Student;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
public class Insert {
	public static void main(String[] args) {
		//获取对象
		MongoClient mc =new MongoClient("localhost",27017);
		//获取库对象
		MongoDatabase db = mc.getDatabase("myschoolxxx");
		//获取表对象
		MongoCollection<Document> student = db.getCollection("student");
		//创建学生对象
		Student s = new Student();
		s.setSid(6);
		s.setSname("赵六");
		s.setBirthday(new Date());
		s.setSsex("女");
		s.setClassid(20);
		//创建爱你一个document独享
		Document doc = new Document();
		//存入数据
		doc.put("sid", s.getSid());
		doc.put("sname", s.getSname());
		doc.put("birhday", s.getBirthday());
		doc.put("ssex", s.getSsex());
		doc.put("classid", s.getClassid());
		student.insertOne(doc);
		//释放资源
		mc.close();
	}
}

package com.ape.conn;
import org.bson.Document;
import org.bson.conversions.Bson;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.model.Filters;
import com.mongodb.client.result.UpdateResult;
public class Update {
	public static void main(String[] args) {
		//获取对象
		MongoClient mc =new MongoClient("localhost",27017);
		//获取库对象
		MongoDatabase db = mc.getDatabase("myschoolxxx");
		//获取表对象
		MongoCollection<Document> student = db.getCollection("student");
		//修改
		//条件对象
		Bson eq = Filters.eq("sname","赵六");		
		//document当选
		Document doc = new Document();
		doc.put("$set", new Document("ssex","男"));
		UpdateResult updateOne = student.updateOne(eq, doc);
		System.out.println(updateOne);
		mc.close();
	}
}

package com.ape.conn;
import org.bson.Document;
import org.bson.conversions.Bson;
import com.google.gson.Gson;
import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.model.Filters;
import com.mongodb.client.result.DeleteResult;
public class Delete {
	public static void main(String[] args) {
        //获取对象
  		MongoClient mc =new MongoClient("localhost",27017);
  		//获取库对象
  		MongoDatabase db = mc.getDatabase("myschoolxxx");
  		//获取表对象
  		MongoCollection<Document> student = db.getCollection("student");
        //创建删除对象
  		Bson eq = Filters.eq("sname", "赵六");
  		DeleteResult deleteOne = student.deleteOne(eq);
        //删除一条
  		System.out.println(deleteOne.getDeletedCount());
		if(deleteOne.getDeletedCount() > 0) {
			System.out.println("删除成功");
		}else {
			System.out.println("删除失败");
		}
		mc.close();
	}
}

package com.ape.conn;
import java.util.List;
import org.bson.Document;
import com.mongodb.MongoClient;
import com.mongodb.client.FindIterable;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase;
import com.mongodb.client.MongoIterable;
public class Test01 {
	public static void main(String[] args) {
		//查找
		//获取对象
		MongoClient mc =new MongoClient("localhost",27017);		
		//获取库对象
		MongoDatabase db = mc.getDatabase("myschoolxxx");
		//获取表对象
		MongoCollection<Document> student = db.getCollection("student");
		//获取表中数据
		FindIterable<Document> find = student.find();
		//获取迭代器对象
		MongoCursor<Document> iterator2 = find.iterator();
		//输出表中数据
		while (iterator2.hasNext()) {
			Document document = (Document) iterator2.next();
			System.out.println(document);
		}
		//关闭资源
		mc.close();
	}
}