Learn from the technical principle of in -depth understanding of the HikaricP Java6 framework

HikaricP is a high -performance Java database connection pool framework, which runs in the Java6 environment.This article will explore the technical principles of HikaricP, including the working principle of the connection pool, the setting of the connection pool parameters, and how to use HikaricP in the Java code. 1. Work principle of connecting pool 1. The creation and initialization of the connection pool: When the application starts, through the configuration of the connection pool attributes and parameters, HikaricP will create a specified quantity database connection and put it in the connection pool. 2. Connection acquisition: When the application needs to interact with the database, the database operation can be performed by obtaining the connection from the connection pool.The connection pool will maintain a free connection queue. The application obtains the connection by calling the getConnection () method. If there is a free connection in the connection pool, it will be directly returned to a connection; if there is no free connection in the connection pool, the maximum number of connections is based on the configuration pool, the maximum number of connections is based on the configuration numberCome to check if you can create a new connection. 3. Release of connection: When the application completes the database operation, the connection is released to the connection pool for other applications.By calling the close () method of Connection, the connection will be marked as "reused" and put back into the connection pool.Note that it is not truly closed the connection, but returns the connection to the connection pool. 2. Settings of connecting pool parameters Hikaricp provides a series of connection pool parameters that can be set by configuration files or code.Here are some commonly used parameter descriptions: 1. JDBCURL: Specify the database URL. 2. Username: database username. 3. Password: database password. 4. ConnectionTimeout: Get the timeout of the connection, the unit in milliseconds.If the connection cannot be obtained within this time, the timeout will be thrown out. 5. MaximumPoolsize: The maximum number of connections of the connection pool. 6. MinimumIdle: The minimum free connection connected to the pond. 7. Idletimeout: The maximum free time of the connection, the free connection that exceeds this time will be marked and removed. 8. LeakDetectionntionThreshold: The connection leak detection threshold is not used if the connection is not used after this time, and it will be marked as a leak. 3. Java example using HikaricP Here are a simple Java code example using HikaricP: import com.zaxxer.hikari.HikariConfig; import com.zaxxer.hikari.HikariDataSource; public class HikariExample { public static void main(String[] args) { HikariConfig config = new HikariConfig(); config.setJdbcUrl("jdbc:mysql://localhost:3306/mydb"); config.setUsername("root"); config.setPassword("password"); HikariDataSource dataSource = new HikariDataSource(config); // Get the database connection Connection connection = dataSource.getConnection(); // Execute the database operation // ... // Release the database connection connection.close(); // Close the connection pool dataSource.close(); } } In the above example, we first created a Hikariconfig object, and then set the relevant information about the database, such as URL, username and password.Then, we use the constructor of HikaridataSource to create a data source object and pass the configuration object.Finally, by calling the getConnection () method, the connection is obtained, the database operation is performed. Fourth, conclusion This article introduces the technical principles of HikaricP, including the working principle of the connection pool, the setting of the connection pool parameters, and how to use HikaricP in the Java code.By reasonable configuration of connection pool parameters, we can improve the performance and efficiency of database connection, and optimize the application of the application database access experience.