How to view the java source code of the class files in the referenced jar package in MyEclipse?

1 & gt； Download this reference. From the official jar package.

2>: to the Web application library → reference. Jar package.

3>: org.apache.commons.dbutils→ Select the class file to view.

4>: No signal source found will be displayed. Click Attach Source.

Then find the commons-dbutils-1.2-sources.jar you downloaded and import it.

5>: If you want to modify the source code yourself, just ctrl+A, then select your project name and paste it.

This will automatically generate files and packages.