Link Spring Source to current project in eclipse

1. Download and import spring related jar packages to download the corresponding version of spring

2. In the current project, select referenced Libraries, expand, select the appropriate jar package, right-click and select Properties

3. On the left side of the popup window, select Java Source Attachment

4. In the right window, select external location, click External File (if you choose External folder, you should download the spring source, and extract, and then select)

5. In the pop-up file browser, locate the spring directory and go to Libs, select the appropriate file name suffix sources jar package, If the source file associated with the Spring-aop-3.2.0.release.jar package is named Spring-aop-3.2.0.release-sources.jar