Java实现mongodb 表复制

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  String tableName = "";try {// 连接到 mongodb 服务  先查询复制的那张表的数据MongoCredential credential = MongoCredential.createCredential("用户名", "数据库名", "密码".toCharArray());MongoClient mongoClient = new MongoClient(new ServerAddress("服务器IP", 端口号), Arrays.asList(credential));System.out.println("Connect to database successfully");DB database = mongoClient.getDB("数据库名");//获取数据库DBCollection collection = database.getCollection(tableName);//集合名DBCursor cursorKey = collection.find();List<DBObject> courseList = new ArrayList<DBObject>();while (cursorKey.hasNext()) {//System.out.println(cursorKey.next());courseList.add(cursorKey.next());}//复制到下面的数据库MongoCredential credential1 = MongoCredential.createCredential("用户名", "数据库名", "密码".toCharArray());MongoClient mongoClient1 = new MongoClient(new ServerAddress("IP", 端口号),          Arrays.asList(credential1));System.out.println("Connect to database successfully");DB database1 = mongoClient1.getDB("数据库名");//获取数据库DBCollection collection1 = database1.getCollection(tableName);//集合名collection1.insert(courseList);// for (DBObject dbObject:courseList){//    collection1.insert(dbObject);//  }} catch (Exception e) {System.err.println(e.getClass().getName() + ": " + e.getMessage());}

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