Java MongoCollection.deleteMany方法代码示例

import com.mongodb.client.MongoCollection; //导入方法依赖的package包/类
/**
 * This is deleted delete all document(s), which is matched
 */
@Override
public void deleteManyDocument() {
	MongoDatabase db = null;
	MongoCollection collection = null;
	Bson query = null;
	try {
		db = client.getDatabase(mongo.getDataBase());
		collection = db.getCollection(mongo.getSampleCollection());
		query = lt("age", 20);
		DeleteResult result = collection.deleteMany(query);
		if (result.wasAcknowledged()) {
			log.info("Document deleted successfully \nNo of Document(s) Deleted : "
					+ result.getDeletedCount());
		}
	} catch (MongoException e) {
		log.error("Exception occurred while delete Many Document : " + e, e);
	}
}
 

import com.mongodb.client.MongoCollection; //导入方法依赖的package包/类
/**
 * This is delete the single document, which is first matched
 */
@Override
public void deleteOneDocument() {
	MongoDatabase db = null;
	MongoCollection collection = null;
	Bson query = null;
	try {
		db = client.getDatabase(mongo.getDataBase());
		collection = db.getCollection(mongo.getSampleCollection());
		query = eq("name", "sundar");
		DeleteResult result = collection.deleteMany(query);
		if (result.wasAcknowledged()) {
			log.info("Single Document deleted successfully \nNo of Document Deleted : " + result.getDeletedCount());
		}
	} catch (MongoException e) {
		log.error("Exception occurred while delete Single Document : " + e, e);
	}
}
 

import com.mongodb.client.MongoCollection; //导入方法依赖的package包/类
public static void setLiveUploadId(String uploadID){

        MongoClient mongoClient = new MongoClient();
        MongoDatabase test = mongoClient.getDatabase("test");
        MongoCollection configCollection = test.getCollection("config");

        configCollection.deleteMany(exists("liveUploadId"));
        configCollection.insertOne(new Document().append("liveUploadId", uploadID));
    }
 

import com.mongodb.client.MongoCollection; //导入方法依赖的package包/类
public void setLiveUploadID(String uploadID){

        MongoClient mongoClient = new MongoClient();
        MongoDatabase test = mongoClient.getDatabase(databaseName);
        MongoCollection configCollection = test.getCollection("config");

        configCollection.deleteMany(exists("liveUploadID"));
        configCollection.insertOne(new Document().append("liveUploadID", uploadID));
    }
 

import com.mongodb.client.MongoCollection; //导入方法依赖的package包/类
public static void main(String[] args) {
        try {
            // 连接到 mongodb 服务
            MongoClient mongoClient = new MongoClient( "localhost" , 27017 );

            // 连接到数据库
            MongoDatabase mongoDatabase = mongoClient.getDatabase("mycol");
            System.out.println("Connect to database successfully");

            MongoCollection<Document> collection = mongoDatabase.getCollection("test");
            System.out.println("集合 test 选择成功");


//            //插入文档
//            /**
//             * 1. 创建文档 org.bson.Document 参数为key-value的格式
//             * 2. 创建文档集合List<Document>
//             * 3. 将文档集合插入数据库集合中 mongoCollection.insertMany(List<Document>) 插入单个文档可以用 mongoCollection.insertOne(Document)
//             * */
//            Document document = new Document("title", "MongoDB").
//                    append("description", "database").
//                    append("likes", 100).
//                    append("by", "Fly");
//            List<Document> documents = new ArrayList<Document>();
//            documents.add(document);
//            collection.insertMany(documents);
//            System.out.println("文档插入成功");

//            //检索所有文档
//            /**
//             * 1. 获取迭代器FindIterable<Document>
//             * 2. 获取游标MongoCursor<Document>
//             * 3. 通过游标遍历检索出的文档集合
//             * */
//            FindIterable<Document> findIterable = collection.find();
//            MongoCursor<Document> mongoCursor = findIterable.iterator();
//            while(mongoCursor.hasNext()){
//                System.out.println(mongoCursor.next());
//            }


//            //更新文档   将文档中likes=100的文档修改为likes=200
//            collection.updateMany(Filters.eq("likes", 100), new Document("$set",new Document("likes",200)));
//            //检索查看结果
//            FindIterable<Document> findIterable = collection.find();
//            MongoCursor<Document> mongoCursor = findIterable.iterator();
//            while(mongoCursor.hasNext()){
//                System.out.println(mongoCursor.next());
//            }


            //删除符合条件的第一个文档
            collection.deleteOne(Filters.eq("likes", 200));
            //删除所有符合条件的文档
            collection.deleteMany (Filters.eq("likes", 200));
            //检索查看结果
            FindIterable<Document> findIterable = collection.find();
            MongoCursor<Document> mongoCursor = findIterable.iterator();
            while(mongoCursor.hasNext()){
                System.out.println(mongoCursor.next());
            }


        } catch (Exception e) {
            System.err.println(e.getClass().getName() + ": " + e.getMessage());
        }
    }
 

import com.mongodb.client.MongoCollection; //导入方法依赖的package包/类
/**
 * 按条件删除
 *
 * @param collectionName 集合名
 * @param query          查询条件
 * @return
 */
public boolean delete(String collectionName, MongodbQuery query) {
    MongoCollection collection = sMongoDatabase.getCollection(collectionName);
    DeleteResult deleteResult = collection.deleteMany(query.getQuery());
    return deleteResult.getDeletedCount() > 0;
}