Question

How can we save file with current date?

Date date11 = Calendar.getInstance().getTime(); 
DateFormat formatter =new SimpleDateFormat("d/M/yyyy"); 
String date1 =formatter.format(date11);
FileWriter fw = new FileWriter("C:\\InjectionExcel"+ date1 +".csv");

date1 given is current date. But this code is not working. Where am I mistaking?

Answer 1

A file name can’t contain any of the following characters in Windows:

\ / * ? " < > |

Your problem is caused by attempting to use / as file name. It will be interpreted as path separator. For example, if the current day is 23 and the directory C:\InjectionExcel23 does not exist, then you will get something like the following exception (which you should initially have reported in your question!):

java.io.IOException: The system cannot find the path specified

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Unrelated to the concrete problem, the way how you created the today’s date is clumsy. You’re generating all that unnecessary Calendar overhead. Just use new Date().

Date date11 = new Date();