Eclipse Search Entire Project

1. Find Search (Ctrl + H) under the Search menu.

2. Open the dialog box and find file Search in the top menu.

containing text input content
File name patterns, if you are searching for a Java file, write *.java, how to be a configuration file (such as XML), write *.xml, or write with 2: *.java,*.xml
At the bottom of the scope select Working Set, and then select the right choose, the new window select selected Working Set--->new-->java, select the project you need to search, fill in the custom alias, It will be displayed in the working set, click Finish, select the alias you just added, OK, you can click Search to finish searching.

Eclipse Search Entire Project