Write MS Excel files in Java

Source: Internet
Author: User

The following sample code is excerpted from the Quick Guide on the poi Website:

Inputstream indium = new fileinputstream ("workbook.xls"); // inputstream indium = new fileinputstream ("workbook.xlsx"); workbook WB = workbookfactory. create (indium); sheet = WB. getsheetat (0); row = sheet. getrow (2); cell = row. getcell (3); If (cell = NULL) cell = row. createcell (3); cell. setcelltype (cell. cell_type_string); cell. setcellvalue ("A test"); // write the output to a file fileoutputstream fileout = new fileoutputstream ("workbook.xls"); WB. write (fileout); fileout. close ();

1. This code is written into the file using the following line: WB. Write (fileout );
2. This code is very inefficient. I wrote a large Excel file with around 0.2 million cells, and it turned out of memory. Therefore, the efficiency is not high.

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