如何读取 JXL Excel 工作表的行和列

Question

I have iterated rows and columns from reading excel but show Arrayindexoutofbound exception. I have given my code and error below

Code :

for (int i = 0; i <= wb.getSheet(0).getRows(); i++) {
    for (int j = 0; j <= wb.getSheet(0).getColumns(); j++) {
        String testData = wb.getSheet(0).getCell(i, j).getContents();
        System.out.println(testData);
    }
}

Stackrace

 User id
    en0063
    en0070
    Psw 
    en0063
    THEROCKZ1
    Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
        at jxl.read.biff.SheetImpl.getCell(SheetImpl.java:356)
        at ExcelRead.main(ExcelRead.java:29)

Excel Image

Answer 1

You are exceeding the number of rows and columns due to you for statments - change <= to <

for (int i = 0; i < wb.getSheet(0).getRows(); i++) {
        for (int j = 0; j < wb.getSheet(0).getColumns(); j++) {
            String testData = wb.getSheet(0).getCell(i, j).getContents();
            System.out.println(testData);
        }
}

By the way it would be a lot easier to read if you stored you sheet in a variable such as

Sheet firstSheet = wb.getSheet(0);

and re-use it as

for (int i = 0; i < firstSheet.getRows(); i++) {   
// etc

edit

I suggest that you print out the number of rows and cells, as it seems that the library you are using seems to include blank ones as well. Maybe you need to test for that.

Consider that you could have something like

X X X
X X X
X X X X