Yeoman is an open-source tool that can help you to create different project skeletons easily and quickly. It contains a yo command-line tool and a lot of structure/template generators to create different project file skeletons ( etc java project, spring boot project). This article will tell you how to use it to create a java […]
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This article will tell you how to install/uninstall Node JS and NPM(node package manager) on macOS step by step. There are three ways to install/uninstall it on macOS, run the official installer, install node binary for macOS directly, or use mac HomeBrew package manager. We will introduce them all.
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Eclipse.ini file is the configuration file where you can edit eclipse tool startup settings, such as increase eclipse JVM heap size to let it use more memory. And spring tool suite is based on eclipse, but the configuration file is not eclipse.ini, it’s name is sts.ini. But the file content is the same. This article
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When you develop a spring java project with maven, sometimes you may encounter errors like below. This is a crazy error because the reason is not very clear. I tried a lot of methods such as rebuild the project, recreate the project, and even delete the .m2 directory to re-download all the maven jar files
When you use the macOS finder to browse files, you can not see the hidden files by default. But sometimes you need to show those hidden files in the macOS Finder to operate on them such as copy, move, etc. This article will tell you two methods to show hidden files in the macOS Finder.
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Spring boot CLI is a spring command-line tool that can help you develop spring applications quickly and easily. It utilizes spring’s start dependence and automation configuration features, then developers can focus on the business logic code, does not need to care about the project jars dependency and configuration. This article will tell you how to
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SpEL is an abbreviation of Spring Expression Language which can be used to query property value from a properties file (Use $), or manipulate java objects and it’s attributes at runtime( Use #). Both of the two modifiers ($ or # ) can be used in the spring XML configuration files directly or can be
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If you want to save configuration data in an external properties file, and then read them in the spring application, you can use PropertyPlaceholderConfigurer class. This class has a location attribute where you can specify the external properties file location. It then can read the data from the external properties file, and you can use
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When you use MySQL JDBC driver to connect to MySQL database server. You may encounter bellow error messages. try { Connection connection = DriverManager.getConnection(“jdbc:mysql://localhost:3306/dev2qa?useSSL=false”,”test”,”666888″); } catch (SQLException ex) { ex.printStackTrace(); System.out.println(“SQL State : ” + ex.getSQLState()); } Below are the error messages. INFO: Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@36d64342: defining beans [org.springframework.beans.factory.config.PropertyPlaceholderConfigurer#0,dataSource,userAccountDao]; root of factory hierarchy com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException:
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This article will tell you how to install the ShadowSocks server in the google cloud Linux server (Ubuntu) and how to connect it from your local machine. But before you can exercise, you should have a google account and have applied google cloud service, please see this article’s reference section to learn how to do
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