Question

我正在开发一个访问MongoDB分片群集的Java驱动程序。当我尝试在数据库find()的集合"test"上执行"db"方法时，它不返回任何内容。但是，我已通过mongo客户端检查了该特定集合中的某些文档。有人可以帮忙吗？非常感谢。

public class App {
    public static void main(String[] args) {
        /**** Connect to MongoDB ****/
        MongoClient mongo = new MongoClient(Arrays.asList(new ServerAddress(
            "10.110.198.147", 27017), new ServerAddress("10.110.198.160",
            27017)));
        /**** Get database ****/
        // if database doesn't exists, MongoDB will create it for you
        DB db = mongo.getDB("db");

        /**** Get collection / table from 'testdb' ****/
        // if collection doesn't exists, MongoDB will create it for you
        DBCollection coll = db.getCollection("test");

        BasicDBObject document = new BasicDBObject();
        document.put("count", "1000");
        coll.insert(document);

        DBCursor cursor = coll.find();

        while (cursor.hasNext()) {
        System.out.println(cursor.next());
        }
    }
}

Answer 1

你能试试吗？

var blob = new Blob($scope.myArray , {
    type: "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet;charset=utf-8"
});
saveAs(blob, "Report.xls");
};

在文档here

上找到它

无法检索MongoDB中的现有文档

1 个答案: