[Study notes]
1) downloading hadoop-eclipse-plugin-2.7.4.jar, the jar package dropins copied to the file in the folder Eclipse installation directory, my directory is C: \ Users \ test \ eclipse \ jee-oxygen \ eclipse \ dropins, then restart Eclipse you can see the MapReduce options.
2) Start eclipse, opening the Windows-> preferences, the following dialog box, set the installation directory hadoop.
3) opening the Windows-> ShowView-> Other ..., the following dialog box.
In which the selected Map / ReduceLocations, click Open after successfully added Map / ReduceLocations window, click on the right side of the baby elephant icon to create New Hadoop Location, as shown below:
Reprinted from the original article: https://blog.csdn.net/qq_44594249/article/details/95500938