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This article mainly introduces "what is the use of IntelliJ IDEA". In daily operation, I believe many people have doubts about the use of IntelliJ IDEA. The editor consulted all kinds of materials and sorted out simple and easy-to-use methods of operation. I hope it will be helpful for you to answer the doubts about "what is the use of IntelliJ IDEA?" Next, please follow the editor to study!

00. Commonly used shortcut

Ctrl+Shift+N or Ctrl+N global search to find a file name in the project

Ctrl+Shift+R global search for files that contain a keyword in the replacement project

Ctrl+Shift+V calls up the contents of the history pasteboard

Ctrl+E to view recently opened files

Ctrl+N-- > navicate to find class files

Ctrl+R current file find replacement content

Ctrl+F file content keyword search (such as finding the setAge keyword in the current file)

Ctrl+o method override

Ctrl+i method implementation

Quick generation of Ctrl+J code blocks

Ctrl+w code block selection

Ctrl+D copies the code block to the end of the block

Ctrl+D also has the ability to compare directories when the cursor is over the project directory

It is equivalent to the integration of the IntelliJ tool with the Beyond Compare tool

Ctrl+Q View document

Ctrl+f12 View File structure

Ctrl+Alt+L code formatting

Ctrl+Alt+S opens the settings window

Alt+Shift+Insert column selection programming

Alt+Shift+C finds recently modified files

Alt+Shift+Enter code blocks automatically generate if,try,do

Press and hold the Alt+ mouse to make column selection

Ctrl+Alt+shift+U class inheritance diagram

Ctrl+F12 query all methods in the class

Debug shortcut key

F8 step in

F9 end breakpoint mode

0, version

IntelliJ IDEA (Ultimate) 2020.1.1

Installation method

Https://my.oschina.net/guiguketang/blog/4674567

1. Project management

Delete an open project

2. Delete Module

Select Project-> right-click-> Remove Module

3. Use of git

3-1. Download the client after installation, the editor will automatically recognize

Https://git-scm.com/download/win

3-2. Import the project through the git address

Get from Version Control

For the first time, you need to install the git client and configure it on the client side

Configure- > setting

3-3. Git account modification

The individual has a github account, and the tool uses the github official website account commit to pass the code.

The company code is also managed by git. When you switch to the company project, submit the code and display the github account of your own extranet in the company code warehouse instead of the account created by the company code warehouse.

This may be a small bug of the IntelliJ editor git plug-in.

If the solution does not take effect, follow Article 6 below.

3-4. Modify git user information (username and mailbox)

View configuration

Git config-global-list

Modify user information

Git config-global user.name "username"

Git config-global user.email "email"

3-5. Git rollback operation

Git reset-soft 5aa322cfa683a3188090c0bcce2ed6c196fc7285

Git push origin HEAD-force

There will be a permission problem. Just turn off the protected permission of the branch where the content of the desired push is located, and log in to the system to modify it.

Settings- > Protected Branches- > Unprotected can execute the above command

After the operation, the remote repository has been rolled back to the desired node.

3-6. Rollback commands checkout, reset

Checkout rolls back code in the workspace

Git checkout-- a.txt # rollback the specified file

Git checkout. # Roll back all files

Reset rollback cache, local warehouse, remote warehouse code

Roll back the code in the cache (the content of the workspace will not change, the code will only add to the cache, no commit to the local warehouse)

Git reset HEAD. # roll back all the contents of add to the cache

Git reset HEAD a.txt # rollback the cache specified file

Reset rolls back the code in the local warehouse (the code has not been push to the remote warehouse, it is only submitted to the local warehouse in a rollback way)

Git reset-- hard # go back to one of the versions you want

Git reset-- hard head ^ # returns to the latest submission

Git reset head ^ # keep the code at this time, go back to before git add

Real fuck

Git add reset_commit.txt

Git commit reset_commit.txt-m "this file will commit to local lib"

Git add reset_commit1.txt

Git commit reset_commit1.txt-m "commit1 again"

Git log

Git reset-hard e5416364ca99a4bb1606bf117dbb23800890824a

And finally went back to the specified version.

Roll back the code in the remote warehouse

Git reset-hard

Git push origin HEAD-force # forcibly submit once, and the previous incorrect submission will be deleted from the remote warehouse

Additional instructions

Using git revert is to roll back the commit before using a new commit.

Git log # get the commit id that you need to return a submission

Git revert # undo the specified version, and the undo will be saved as a submission

-git revert uses a new commit to roll back the previous commit, and the commit before this submission will be retained

-git reset is returned to a certain submission. Both the submission and the previous commit will be retained, but all changes made after this commit id will be deleted.

View the git branch tree:

Gitk-all

3-7.git submit code to exclude exception configuration

Modify the .gitignore file under the root of the project

# Created by .engineer support plugin (hsz.mobi) # Example user template template### Example user template# IntelliJ project files.idea*.imloutgen### Java template# Compiled class file*.class# Log file*.log# BlueJ files*.ctxt# Mobile Tools for Java (J2ME). Mtj.tmp/# Package Files # * .jar * .war * .nar * .ear * .zip * .tar.gz * .rar # virtual machine crash logs See http://www.java.com/en/download/help/error_hotspot.xmlhs_err_pid*targetdistnode_modules

3-8.IntelliJ github shared by newly created projects

Https://my.oschina.net/guiguketang/blog/4483939

4.svn configuration

5. Configure maven in idea:

5-1. Configuration

Click [File] > [Settings] > search [Maven]

5-2. Maven configuration takes effect globally

After configuring the maven environment through 12, each time you create a new project, the configuration returns to the default. The solution is as follows

Once configured, rebuild the project and load the maven environment that you just configured.

5-3. Use the mvn command to load the specified jar package into the local computer repository (very important, must be mastered)

Mvn install:install-file-Dfile=commons-discovery-0.2.jar-DgroupId=com.commons.discovery-DartifactId=commons-discovery-Dversion=0.2-Dpackaging=jar

Code snippet in pom.xml

Com.commons.discovery commons-discovery 0.2

6. The project window in IDEA does not display the project catalogue.

The .idea directory file is damaged. Delete the .dea directory under the project and restart the idea tool.

7.java project

7-1. Start memory parameter configuration

For microservice development, there are many projects that need to be started, including gateways, registries, authorization centers, etc., in addition to the subject project, if the project is separated from the front and back ends.

At the same time, the front-end service needs to be started, which takes up too much memory and computer resources.

The work efficiency of the computer is greatly reduced, and the resources occupied by the project can be reduced by configuring the Vm options property, so as to improve the work efficiency of the editor.

7-2.spring cloud project services console display

View- > tools-services

8. Configuration of the tool itself

8-1. Background settin

File-Settings-Editor-Color Scheme

8-2. Encoding settin

Solve Chinese garbled code

File= > Settings= > Editor= > File Encodings

8-3.IDEA sets window label wrapping display

Windows-> editor tabs-> Configure Editor Tabs- > just turn off show tabs in one row

9.debug operation instructions

> Show Execution Point (Alt + F10): if your cursor is on another line or page, click this button to jump to the current line of code execution.

> Step Over (F8): step by step and go down line by line. If there is a method in this line, it will not enter the method.

> Step Into (F7): step in. If there is a method in the current line, you can enter the method inside the method. It is generally used to enter the custom method, but not the official class library, such as the put method in line 25.

> Force Step Into (Alt + Shift + F7): force entry. You can enter any method. You can use this method to enter the official class library when viewing the underlying source code.

> Step Out (Shift + F8): step out and exit from the inbound method to the method call. At this time, the method has been executed, but the assignment has not been completed.

> Drop Frame (none by default): return the breakpoint, which is described in the following chapters.

> Run to Cursor (Alt + F9): run to the cursor, you can locate the cursor to the line you need to view, and then use this feature, the code will run to the cursor line without the need for a break point.

> Evaluate Expression (Alt + F8): evaluate expressions and dynamically view the values of objects or variables

10. Coding is fast

11-1. Main method psvm

Public static void main (String args []) {

}

11. Configure tomcat data sources

According to the online method, the configuration was not successful. Finally, I configured the data source directly in the conf/context.xml file under the tomcat directory.

For details, see another blog post.

Https://my.oschina.net/guiguketang/blog/5026902

12. Practical problems

12-1. Java project run mode starts successfully; debug mode cannot be started.

Based on the phenomenon, it can be concluded that it is not the code problem; the reason is that there is a breakpoint on the method name.

The shortcut key ctrl+shift+f8 opens the breakpoint panel and finds that there is really a breakpoint on the method name. After removing the breakpoint, the breakpoint is successfully started in debug mode.

12-2. Idea needs to restart tomcat every time you modify jsp

The problem can be solved by configuring according to the figure below.

With regard to the configuration instructions, this blog post makes a detailed interpretation.

Http://www.mamicode.com/info-detail-1699044.html

13. Plug-in MyBatisX

Mybatisplus implementation class method jumps to concrete sql plug-in

14. Conversion from ordinary java project to maven project

Step1: add a new pom.xml file to the root of the project

Step2: file-> right-click-> Add as Maven Project

At this point, the study on "what is the use of IntelliJ IDEA" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!

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