迭代器造成堆溢出

OutOfMemoryError java neap space

while (iterator.hasNext()) {
    Object rowObj = iterator.next(); //这里千万不能写成hasNext()
    if (rowObj == null){
        jsonArray.put(new JsonStringObject(null));
    }
    else if (rowObj.getClass().isArray() || rowObj instanceof Collection){
        jsonArray.put(getJsonArray(rowObj,useClassConvert));
    }
    else {
        jsonArray.put(getJsonObject(rowObj,useClassConvert));
    }
}

注意坑点

iterator.next()，如果写成iterator.hasNext()就会造成neap space.