View java source code and detailed introduction of annotation methods

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I have been working for three years and I still don’t know how to use IDE to view the source code and comments of third-party jar packages. I’m so ashamed! It's better to look at the source code. itellij idea comes with a decompiler, and eclipse can just install a plug-in. Reading the comments is troublesome. You can't go to the api document! Now that I have finally mastered it, the solution is given below for your reference to improve the efficiency of development and learning!

eclipse

1. Download the source code package

1.1 Go to the official website to download

1.2 Go to the maven warehouse to download (for example: maven mysql Baidu, the warehouse address will definitely appear, just find a certain version to download)

1.3 maven command download (applicable to maven projects) , open the command line in the pom.xml folder and enter: mvn dependency:sources

2. Associate to jar package

Right-click the project->Build Path->Configure Build Path...->Select the Libraries tab of Java Build Path->Find the corresponding jar package->Source attachment->Edit->External location->External File...Select the corresponding source code package

3. Move the mouse to the method Stay above for a while, and the method comment prompt

intellij idea

1. Download the source code package

Same as above

2. Add to library

Click the toolbar module settings icon (Project Structure) -> Libraries -> + -> Java- >Select the jar source code package or the folder where the source code package is located

If it is a maven project, as long as the source code package has been downloaded in the local maven warehouse, the above configuration is not required

3. To view the method comments, click to enter the source code. If you want to display the comment prompt by hovering the mouse like eclipse, the opening method is:

Preferences-> ;Editor->General->Other->Show quick documentation on mouse move hook on

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