MySQL Connector/J 8.0.21 - A Comprehensive Reference and Documentation
MySQL Connector/J is the official JDBC driver for MySQL. It allows Java applications to connect and interact with MySQL databases using the standard Java Database Connectivity (JDBC) API. It also supports the new X DevAPI, which is a modern, fluent, and intuitive way of working with MySQL as a document store.
MySQL Connector/J is a library that consists of a single jar file that can be added to the classpath of any Java application that needs to communicate with MySQL databases. In this article, we will show you how to download, install, and use MySQL Connector/J 8.0.21 jar file, which is the latest General Availability release of the MySQL Connector/J 8.0 series. We will also discuss some of the benefits and common issues of using this version of the driver.
mysql connector java 8.0 21 jar download
Downloading mysql connector java 8.0 21 jar file
To download MySQL Connector/J 8.0.21 jar file, you can visit the official website of MySQL at . You can choose your operating system and platform from the drop-down menus and click on Download.
You will be redirected to a page where you can either sign in or sign up for an Oracle account, or click on No thanks, just start my download link at the bottom of the page. You will then see a pop-up window that shows you the name and size of the file you are about to download.
The file name should be mysql-connector-java-8.0.21.jar and its size should be about 4 MB. You can save it to any location on your computer that you prefer.
Installing mysql connector java 8.0 21 jar file
Adding the jar file to the classpath
After downloading the jar file, you need to add it to the classpath of your Java application so that it can be loaded by the Java runtime environment. There are different ways to do this depending on your development environment and preferences.
One way is to set an environment variable called CLASSPATH that points to the location of the jar file on your computer. For example, if you saved the jar file in C:\mysql-connector-java-8.0.21.jar on Windows, you can set the CLASSPATH variable as follows:
This will append the jar file location to the existing classpath value. You can also use a semicolon (;) to separate multiple jar files in the classpath.
Another way is to use the -cp or -classpath option when running your Java application from the command line. For example, if your application is called MyApp.class and it is located in C:\myapp, you can run it as follows:
java -cp C:\mysql-connector-java-8.0.21.jar;C:\myapp MyApp
This will tell the Java runtime environment to look for the jar file and the application class in the specified locations.
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A third way is to use your integrated development environment (IDE) settings to add the jar file to the classpath of your project. Different IDEs have different ways of doing this, but usually you can find an option to add external libraries or dependencies to your project. For example, in Eclipse, you can right-click on your project name, select Properties, then Java Build Path, then Libraries, then Add External JARs, and browse to the location of the jar file.
Loading the driver class
After adding the jar file to the classpath, you need to load the driver class that implements the JDBC interface for MySQL. There are two ways to do this:
One way is to use the Class.forName() method with the fully qualified name of the driver class as a parameter. For example:
This will load and register the driver class with the DriverManager class, which is responsible for managing JDBC drivers and connections.
Another way is to use the DriverManager.registerDriver() method with an instance of the driver class as a parameter. For example:
This will also register the driver class with the DriverManager class.
Note that both methods require a try-catch block to handle ClassNotFoundException or SQLException that may occur.
Connecting to MySQL database using mysql connector java 8.0 21 jar file
Creating a connection URL
To connect to a MySQL database using MySQL Connector/J, you need to create a connection URL that specifies the host, port, database name, and other parameters for connecting to MySQL server. The general format of the connection URL is as follows:
The host is the name or IP address of the MySQL server. The default port is 3306. The database is the name of the database you want to connect to. The parameters are optional and can be used to customize various aspects of the connection, such as user name, password, character encoding, SSL mode, etc.
For example, a connection URL that connects to a database called test on a local MySQL server with user name root and password root1234 using UTF-8 encoding and SSL mode required would look like this:
You can find more information about the connection URL syntax and parameters in .
Obtaining a connection object
To obtain a connection object that represents a physical connection to the MySQL database, you can use one of two methods:
One method is to use the DriverManager.getConnection() method with the connection URL as a parameter. For example:
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/test?user=root&password=root1234&characterEncoding=UTF-8&sslMode=REQUIRED");
This will return a Connection object that you can use to execute SQL statements and perform other database operations.
Another method is to use a DataSource object that encapsulates the connection information and provides a getConnection() method that returns a Connection object. For example:
MysqlDataSource dataSource = new MysqlDataSource();dataSource.setURL("jdbc:mysql://localhost:3306/test");dataSource.setUser("root");dataSource.setPassword("root1234");dataSource.setCharacterEncoding("UTF-8");dataSource.setSslMode ("REQUIRED");Connection conn = dataSource.getConnection();
This will also return a Connection object that you can use for database operations. Using a DataSource object can be more convenient and flexible than using a connection URL, as you can set and change the connection properties programmatically.