In IntelliJ idea, develop a fishing and reading plug-in

Little brother Fu 2021-11-25 18:24:48
intellij idea develop fishing reading

author : Little brother Fu
Blog :
original text :

precipitation 、 Share 、 grow up , Let yourself and others have something to gain !

One 、 explain

The direction is wrong , Efforts in vain !

Someone always gets the demand for the product , Just rush to work , Anyway, I'm lazy to think about what will happen in development , How many people use... After online , Let's pile up the code and have a look , Just run anyway , Whether the code or you !

In fact, many times before writing code , Technical research required 、 Architecture design 、 Module layering 、 data structure 、 Detailed analysis 、 Scheme review, etc , And Three seven twenty-one guy By contrast , Seems to be a little slow . But this seemingly slow process , But it can solve many common and troublesome problems in the future , For example, product requirements iteration 、 Business process change 、 Code logic changes 、 Online exception troubleshooting . Although it looks slow , But the process of building a foundation is like laying a foundation , There must always be a stable foundation , To build the whole building . Ten thousand Zhang tall buildings rise from the ground , Don't build a platform in the sand

Two 、 The purpose of the demand

If you need to develop a plug-in with custom functions , Whether it's processing code 、 auxiliary ORM Generate 、 Log information recording, etc , It is necessary to configure the function of a plug-in, initialize and display the corresponding functions to the whole system IDEA In the right or bottom bar of the form , This can meet the basic needs of a plug-in .

So this needs to be done in IDEA forms File -> Settings Expand your own configuration form , And develop what you need ToolWindow Embedded in IDEA in ( left 、 On the right side 、 Lower side ), Here, the development of forms needs to use Swing But at the moment IDEA To develop such a function, you only need to drag and drop the form , It's still pretty easy .

So next, let's take one in IDEA The scene of fishing and reading is a case , Learn the function realization of configuration form and reading form .

3、 ... and 、 Case development

1. Engineering structure

├── .gradle
└── src
├── main
│ └── java
│ └──
│ └── factory
│ │ ├──
│ │ └──
│ └── ui
│ │ ├──
│ │ ├── ReadUI.form
│ │ ├──
│ │ └── SettingUI.form
│ └── Config
├── resources
│ └── META-INF
│ └── plugin.xml
├── build.gradle
  • The source code for :# official account :bugstack Wormhole stack reply :idea You can download all IDEA Plug in development source code

This project mainly involves two parts , stay factory One of them is the configuration form 、 One is to read the form , The corresponding two groups UI The implementation of the . Last factory Class implementation will be configured to plugin.xml For use in , At the same time plugin.xml Control form position and icon in .

2. establish UI forms

2.1 How it was created

New -> Swing UI Designer -> GUI Form

  • stay Java The main ways to create forms in are AWT、Swing、JavaFx, because IDEA Use Swing Development , So here we create Swing Form compatibility will be better .
  • So here Swing The creation of forms can be their own handwritten form structure , You can also use visual drag and drop GUI Form If your form is not complex , In fact, the drag and drop method can meet the use .

2.2 Configure page form

public class SettingUI {
private JPanel mainPanel;
private JPanel settingPanel;
private JLabel urlLabel;
private JTextField urlTextField;
private JButton urlBtn;
public SettingUI() {
// Add an event to the button to select a file 
urlBtn.addActionListener(e -> {
JFileChooser fileChooser = new JFileChooser();
File file = fileChooser.getSelectedFile();
public JComponent getComponent() {
return mainPanel;
public JTextField getUrlTextField() {
return urlTextField;

  • The configuration page form mainly provides the selection of article path , The tags used here include :JLabel、JTextField、JButton
  • In the use of GUI Form After creating the form , There will be such a visual page , On the right side, you can drag various labels to the middle panel , Set the display name and attribute name on the left .
  • Finally, the code tag code here will be displayed to in , And the rendered content will be hidden , This method is also more convenient to control the addition of some custom content , For example, events and new forms
  • In addition to in , You also need to add a button event to the constructor , Used to open the file selector , Put the files we need to open , Set to urlTextField in .

2.3 Read page form

public class ReadUI {
private JPanel mainPanel;
private JTextPane textContent;
public JComponent getComponent() {
return mainPanel;
public JTextPane getTextContent() {
return textContent;

  • Creating a form is the same as configuring a page form , Also by dragging into the panel , Used to display the contents of the path file .
  • You can add some other buttons as appropriate , For example, turn the page and read 、 Scroll bar 、 Word number display, etc .

3. ToolWindow Tool box

In order to realize our own Read the form Put it all over IDEA In the right sidebar , We need to create one that implements ToolWindowFactory The interface of , And configure the implementation class to plugin.xml in

public class ReadFactory implements ToolWindowFactory {
private ReadUI readUI = new ReadUI();
public void createToolWindowContent(@NotNull Project project, @NotNull ToolWindow toolWindow) {
// Get an instance of the content factory 
ContentFactory contentFactory = ContentFactory.SERVICE.getInstance();
// obtain ToolWindow Display content 
Content content = contentFactory.createContent(readUI.getComponent(), "", false);
// Set up ToolWindow Display content 
// Global use 
Config.readUI = readUI;
  • Interface method ToolWindowFactory#createToolWindowContent It is a method that needs to be implemented by its own tool box class , In this createToolWindowContent Method ReadUI After instantiation, fill it in .
  • The subsidies for adding forms mainly depend on ContentFactory.SERVICE.getInstance() Create ContentFactory And finally use toolWindow Add form display UI that will do .
  • Here we have added an additional global attribute Config.readUI This is so that you can use this in the configuration form later UI Set the file content .

4. Configurable Configuration box

public class SettingFactory implements SearchableConfigurable {
private SettingUI settingUI = new SettingUI();
public @NotNull String getId() {
return "";
public @Nls(capitalization = Nls.Capitalization.Title) String getDisplayName() {
return "test-config";
public @Nullable JComponent createComponent() {
return settingUI.getComponent();
public boolean isModified() {
return true;
public void apply() throws ConfigurationException {
String url = settingUI.getUrlTextField().getText();
// Set the text message 
try {
File file = new File(url);
RandomAccessFile randomAccessFile = new RandomAccessFile(file, "r");;
byte[] bytes = new byte[1024 * 1024];
int readSize =;
byte[] copy = new byte[readSize];
System.arraycopy(bytes, 0, copy, 0, readSize);
String str = new String(copy, StandardCharsets.UTF_8);
// Set contents 
} catch (Exception ignore) {
  • Come true from SearchableConfigurable There are many interface methods , Include :getId、getDisplayName、createComponent、isModified、apply These are mainly used to write logic implementation createComponent and apply
  • createComponent The main method is to create our own UI The panel is provided to JComponent
  • apply It's an event , When we click Finish configuration OK、 complete , This method will be triggered when . In this method, we get the file URL Address using RandomAccessFile Read and parse the file , And finally show the file content to the reading form Config.readUI.getTextContent().setText(str);

5. To configure plugin.xml

<extensions defaultExtensionNs="com.intellij">
<!-- Add your extensions here -->
<!-- To configure File -> Settings -> Tools -->
<projectConfigurable groupId="tools" displayName="My Test Config" id=""
<!-- forms (IDEA On the right side of the interface ) -->
<toolWindow id="Read-Book" secondary="false" anchor="right" icon="/icons/logo.png"
  • This time at plugin.xml The main configuration content in is projectConfigurable and toolWindow, In addition to toolWindow There is also a icon Of logo, After the configuration is completed, it can be done in IDEA The page shows our own added form .

Four 、 Plug in testing

  • adopt Plugin Start the plug-in , A new one will be opened at this time IDEA forms , In this new form, you can see the functions we added .

Profile path

  • Click the select button , Choose your file location , Select and click OK

View the presentation file

  • After confirming the file path , You can see the contents of your own documents in the right column . Is it expanding , It's suitable for you to fish !?

5、 ... and 、 summary

  • Learn custom development UI, hold UI Fill to where you need to place IDEA Form position , And add functional process steps in the form , In fact, it mainly includes three aspects :Swing UI、Factory Implementation class 、plugin To configure .
  • stay plugin Configuration in progress , It mainly includes forms ID、 Location 、icon Icon 、 The corresponding implementation class , If you don't add these, you can't display the form information normally .
  • In addition, it can be based on this case , Add the functions you want to complete , For example, make the function of fishing and reading more perfect , Can support different types of files , It could even be PDF The reading of , And the books you want to read .

6、 ... and 、 Series recommendation

本文为[Little brother Fu]所创,转载请带上原文链接,感谢

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