MongoDB和Java-PHP
一、java操作mongoDB
配置环境：
1、下mongodb JDBC驱动mongo-java-driver-3.2.2.jar,并包含在classpath中
步骤：
1、连接数据库
1 // 连接到 mongodb 服务 2 MongoClient mongoClient = new MongoClient( "localhost" , 27017 ); 3 // 连接到数据库 4 MongoDatabase mongoDatabase =mongoClient.getDatabase("mycol");
2、如果需要验证用户名和密码，则
1 //连接到MongoDB服务 如果是远程连接可以替换“localhost”为服务器所在IP地址 2 //ServerAddress()两个参数分别为 服务器地址 和 端口 3 ServerAddress serverAddress = new ServerAddress("localhost",27017); 4 List<ServerAddress> addrs = new ArrayList<ServerAddress>(); 5 addrs.add(serverAddress); 6 //MongoCredential.createScramSha1Credential()三个参数分别为 用户名 数据库名称 密码 7 MongoCredential credential =MongoCredential.createScramSha1Credential("username", "databaseName", "password".toCharArray()); 8 List<MongoCredential> credentials = new ArrayList<MongoCredential>(); credentials.add(credential); 9 //通过连接认证获取MongoDB连接 10 MongoClient mongoClient = new MongoClient(addrs,credentials); 11 //连接到数据库 12 MongoDatabase mongoDatabase =mongoClient.getDatabase("databaseName");
3、操作数据库
创建集合
mongoDatabase.createCollection("test");
获取集合
MongoCollection<Document> collection = mongoDatabase.getCollection("test");
插入文档
1 Document document = new Document("title", "MongoDB"). 2 append("description", "database"). 3 append("likes", 100). 4 append("by", "Fly"); 5 List<Document> documents = new ArrayList<Document>(); 6 documents.add(document); 7 collection.insertMany(documents);
获取文档
1 FindIterable<Document> findIterable = collection.find(); //获取迭代器 2 MongoCursor<Document> mongoCursor = findIterable.iterator(); //获取游标 3 while(mongoCursor.hasNext()){ 4 System.out.println(mongoCursor.next()); 5 }
更新文档
1 //更新文档 将文档中likes=100的文档修改为likes=200 2 collection.updateMany(Filters.eq("likes", 100), new Document("$set",new Document("likes",200)));
删除文档
1 //删除符合条件的第一个文档 2 collection.deleteOne(Filters.eq("likes", 200)); 3 //删除所有符合条件的文档 4 collection.deleteMany (Filters.eq("likes", 200));
