Java中异常处理机制的实战应用-向日葵屋

Java中异常处理机制的实战应用

在Java中，异常处理机制是通过try-catch-finally语句来实现的。下面是实战应用的一些例子：

操作数据库时可能出现的错误：
```java
import java.sql.*;

public class DatabaseErrorHandling {
public static void main(String[] args) {
String url = “jdbc//localhost:3306/test”;
String username = “username”;
String password = “password”;

    try (Connection conn = DriverManager.getConnection(url, username, password);
         Statement stmt = conn.createStatement()) {
        // 插入数据
        int rowsInserted = stmt.executeUpdate("INSERT INTO table_name column1, column2 VALUES ('value1', 'value2')");
        if (rowsInserted > 0) {
            System.out.println("Data inserted successfully!");
        } else {
            System.err.println("Failed to insert data into the database.");
        }
    } catch (SQLException ex) {
        System.err.println("Error occurred while handling SQL operations:");
        ex.printStackTrace();
    }
}

}

2. 文件操作错误：
```java
import java.io.*;
public class FileHandlingException {
    public static void main(String[] args) {
        String filePath = "path/to/invalid/file.txt";
        try (FileReader reader = new FileReader(filePath)) {
            System.out.println("Reading file from path: " + filePath);
        } catch (FileNotFoundException e) {
            System.err.println("Failed to find specified file: " + filePath);
            e.printStackTrace();
        }
    }
}