jdbc连接数据库常用方式
    英文回答：
    JDBC (Java Database Connectivity) is a standard API (Application Programming Interface) for connecting Java applications to a database. There are several commonly used ways to establish a JDBC connection to a database.
    1. Using DriverManager: This is the most basic and commonly used method to establish a JDBC connection. It involves loading the JDBC driver class, specifying the database URL, username, and password, and then creating a connection object using the DriverManager class. Here's an example:
    java.
    import java.sql.Connection;
    import java.sql.DriverManager;
    import java.sql.SQLException;
    public class Main {。
        public static void main(String[] args) {。
            String url = "jdbc:mysql://localhost:3306/mydatabase";
            String username = "myusername";
            String password = "mypassword";
            try {。
                Class.forName("sql.jdbc.Driver");
                Connection connection = Connection(url, username, password);
                // Use the connection object for database operations.
            } catch (ClassNotFoundException | SQLException e) {。
                e.printStackTrace();
            }。
        }。
    }。
    2. Using DataSource: The DataSource interface provides a more flexible and efficient way to establish a JDBC connection. It allows for connection pooling, which can improve performance by reusing existing connections instead of creating new ones. Here's an example:
    java.
    import javax.naming.Context;
    import javax.naming.InitialContext;
    import javax.naming.NamingException;
    import javax.sql.DataSource;
    import java.sql.Connection;
    import java.sql.SQLException;
    public class Main {。
        public static void main(String[] args) {。
            try {。
                Context context = new InitialContext();
                DataSource dataSource = (DataSource) context.lookup("java:comp/env/jdbc/mydatabase");
                Connection connection = Connection();
excel连接sql数据库教程
                // Use the connection object for database operations.
            } catch (NamingException | SQLException e) {。
                e.printStackTrace();
            }。
        }。
    }。
    These are the two commonly used ways to establish a JDBC connection to a database. The first method using DriverManager is simpler and suitable for most scenarios, while the second method using DataSource provides more flexibility and performance optimization through connection pooling.

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