Java从Excel读取数据

Question

I want to read data from Excel - only numbers so I can compare it later, I go in a loop and I have code like this:

int type = cell.getCellType();
    switch(type){
    case 0:
        int value = (int)cell.getNumericCellValue();
    case 1:
        String temp = cell.getStringCellValue();
        int value = Integer.parseInt(temp);

    }

It's like this because sometimes data in Excel have numeric type, sometimes string type.

Now my questions. Is casting to int a good idea? If I have number 1.200 in a cell with type String so it's "1.200" how to convert it to int (or float if it's better)? What is the best way to do it?

All I need is - numbers (sometimes from String cell types) so I can compare it with numbers from another datasource.

Answer 1

CellType.Numeric refers to cells whose contents contain integers , fractions or dates .

Therefore, if you are reading cells that can potentially have more than one specific numeric type then you will need to put in further work to narrow the classification.

getNumericCellValue() returns a double (assuming the cell is of type CellType.Numeric )

Casting this double to int will result in the decimal and all digits after being dropped. So 1.200 would become 1 . Hence it is likely in your case that casting it as a float is better. If you want to ensure no loss in accuracy then don't cast at all; just save it as a double .