异常处理进阶：Java 8 Try-with-resources新特性实践-蒲公英云

异常处理进阶：Java 8 Try-with-resources新特性实践

Java 8引入了Try-with-resources这个新的异常处理机制，它使得资源的关闭在try块中明确执行，大大简化了代码，避免了许多资源未关闭导致的问题。

下面是一个简单的实践例子，展示了如何使用Try-with-resources来管理数据库连接：

import java.sql.Connection;
import java.sql.DriverManager;
import java.util.concurrent.CompletableFuture;
public class DatabaseManager {
    private static final String DATABASE_URL = "jdbc:mysql://localhost:3306/mydatabase";
    public CompletableFuture<Connection> getConnection() {
        CompletableFuture<Connection> future = new CompletableFuture<>();
        try (Connection connection = DriverManager.getConnection(DATABASE_URL))) {
            // 操作数据库
            // ...
            future.complete(connection);
        } catch (Exception e) {
            future.completeExceptionally(e);
        }
        return future;
    }
    public static void main(String[] args) {
        DatabaseManager manager = new DatabaseManager();
        CompletableFuture<Connection> connectionFuture = manager.getConnection();
        connectionFuture.thenAccept(connection -> {
            System.out.println("Connected to database: " + connection.getMetaData().getDatabaseProductName());
            // 使用连接
            // ...
        })).exceptionally(e -> {
            System.err.println("Failed to connect to database: " + e.getMessage());
            return null;
        }));
    }
}