Prerequisites for running JAR files Running JAR files on a Linux system requires the installation of the Java Runtime Environment (JRE), which is the basic component required to execute Java applications, including the Java Virtual Machine (JVM), core class libraries, etc. Many mainstream Linux distributions, such as Ubuntu, Debian, Fedora, openSUSE, etc., provide software libraries of JRE packages to facilitate user installation. The following article will detail the steps to install JRE on popular distributions. After setting up the JRE, you can choose to use the command line terminal or the graphical user interface to start the JAR file according to your personal preference. Your choice may depend on familiarity with Linux shells and personal preference

Create a dockerfile file in the project directory dockerfile, which will be used later. The file is deployed in the newly created /data/docker/hellolearn folder on the server (the file path can be customized). Copy the maven packaged jar package and the dockerfile file created above to the newly created folder on the server (/data/docker/hellolearn). . Generate the image dockerbuild-thellolearn.dockerbuild-t Image name: the relative position of the label dockerfile, the dot represents the current directory, and the default is latest if no tag is written. Start container doc

maven command: 1.mvncleanpackage-DskipTests: Run this command in the project directory to generate a jar package or war package in the target directory. 2.mvnclean: Clean the temporary files produced by the project, usually the target directory under the module 3.mvncompile-DskipTests: The module installation command copies the packaged jar/war file to your local warehouse for use by other modules -Dmaven. test.skip=true skips testing (testcompile will also be skipped).4.mvntest: test command, or execute src/test/java/

1. SpringBoot specifies the configuration file path: In SpringBoot, the configuration file can be placed outside the jar package, so that the configuration can be easily modified without repackaging and deployment. The following are several ways to specify the configuration file directory: (sorted from high to low effectiveness priority) 1) Use command line parameters: When starting the application, you can use --spring.config.location or -Dspring.config. The location command line parameter specifies the path to the configuration file, for example: (the / after config cannot be omitted) java-jartest.jar--spring.config.locatio

Preface: The company has a project that is in a hurry, and some of the project's requirements are the same as some of the functions of previous projects. In order to speed up and directly introduce some modules in the previous multi-module maven project in the form of jar packages. The new project was launched. Although it saved a lot of development time, it also caused the project to need to import the related dependencies of the project jar, causing the project to be bloated and slow to start. Is there a way to make the project load only the beans it needs? Of course, we can directly modify the source code and repackage it to solve the problem, but this method is too troublesome. Through Baidu's method, the query can use the @ComponentScan annotation on the springboot startup class to implement the code example @Componen

1. Application.properties is external. Most of the configuration information is configured in application.properties, so can this file be external? Of course this is possible. First define a property in application.preperties: demo.name=hello.01 and use it in Controller: @Value("${demo.name}")privateStringdemoName;@RequestMapping("/test")publicSt

Foreword In the configuration file of springboot, the names of the configuration files have their own meanings and uses. dev development environment prod production environment (default) test test environment loads the specified configuration file--spring.profiles.active=prod The ways for springboot to load jar packages are/ /Start directly in the console. The disadvantage is that the project will be closed when the console is closed. java-jarbootdo.jar//This method can run in the background, but if the shell is launched, it will also hang java-jar/bootdo-2.0.0.jar>bootdolog.file2>&

Springboot implements jar operation and copies resources files to the specified directory 1. Requirements During the project development process, all resources in the project resources/static/ directory need to be copied to the specified directory. Video files need to be downloaded in the company's project. Since the download has an html page, the corresponding static resource files are used to load the multi-channel video, such as js, css.jwplayer, jquery.js and other files, jars made by maven and The path of the usually published project is blocked, so when reading the path, the path of the jar is obtained, and the file path in the jar cannot be obtained. 2. Idea According to my needs, the idea of ??copying is probably to obtain it first