title: install xlsx and xlsxjars in R 3.2.0
body: <p>Since today I am using the R Version 3.2.0 for statistical analysis. Today I try to install the packages "xlsx" and "xlsxjars" for my new installation but it didn't work. Every time I try to install the packages (<code>install.packages("xlsx")</code>) I get the following error message:  </p>
  
  <pre><code>Warning in install.packages :
  downloaded length 9351168 != reported length 9485172
  trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.2/xlsx_0.5.7.zip'
  Content type 'application/zip' length 400857 bytes (391 KB)
  downloaded 391 KB
  Warning in install.packages :
    error 1 in extracting from zip file
  Warning in install.packages :
    cannot open compressed file 'xlsxjars/DESCRIPTION', probable reason 'No such file or directory'
  Error in install.packages : cannot open the Connection`
  </code></pre>
  
  <p>The problem only take place when I try to install the xls-packages. Other packages can be installed smoothly without any problems. 
  I hope there is anyone out there who had already installed the aforesaid packages in R Version 3.2.0 and can give me a short advice how to install the packages in the new R Version?</p>