What I do not understand (and if you have an explanation I am all ears) is that when I uncheck both options and I save these 350,000 lines in a file created by Talend, it works very well and it is extremely fast!
java.io.FileOutputStream fos = new java.io.FileOutputStream(
Excel found unreadable content in 'test.xlsx'. Do you want to recover the contents of this workbook? If you trust the source of this workbook, click Yes.
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