Question

我已经向MongoDB插入了一个short []数组。这很容易。现在我试图检索相同的数组。它返回一个BasicDBList。我想对列表的元素进行一些操作。因此，我想将其转换为 Java short []返回。我怎样才能做到这一点？

以下是代码：

/ *插入1DArray * /

    DB dB = (new MongoClient("localhost",27017)).getDB("Test1DArray");
    DBCollection dbcollection = dB.getCollection("Test1DArray");
    BasicDBObject aisDocument = new BasicDBObject();
    aisDocument.append("TDArray",out1D);
    dbcollection.insert(aisDocument);

/ *获取1DArray * /

    ObjectId MLMatrixObjectsID = (ObjectId)aisDocument.get( "_id" );
    System.out.println(MLMatrixObjectsID);
    BasicDBObject fields = new BasicDBObject();
    fields.put("_id", MLMatrixObjectsID);
    DBCollection dbcollectionfetch = dB.getCollection("Test1DArray");
    DBCursor cursor = dbcollectionfetch.find(fields);

    BasicDBList ODarr=null;
    while (cursor.hasNext()) {
        ODarr = (BasicDBList)(cursor.next().get("TDArray"));
        for(int cell=0; cell < ODarr.size(); cell++){
            System.out.println(ODarr.get(cell));
        }
    }

感谢任何帮助。谢谢。

Answer 1

Object[]  str  =  `ODarr.toArray();
short[] x  =  new short[str.length];
for (int i = 0; i < str.length; i++) {  
x[i]=((Integer) str[i]).shortValue();}

这有帮助吗？

将MongoDB BasicDBList转换为Java short [] Array

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