title: Merging Two excel files as two sheets in one workbook in java
body: <p>I have two xlsx files at folder C:\DemoFilesExcel\demo1.xlsx and C:\DemoFilesExcel\demo2.xlsx.</p>
  
  <p>I want to create a new xlsx  C:\DemoFilesExcel\merged.xlsx that will have these two files as two sheets in merged.xlsx workbook. </p>
  
  <p>This is to be done using apache POI in java. Any idea how to do</p>