假如你通过实验掌握了掌握JDBC增删查改MySQL数据库表的方法。 2、在增删查改页面间跳转

回答：这是一个关于技术的问题，我可以帮您解答。要在页面间跳转，您可以使用HTML的超链接或JavaScript的window.location方法。至于JDBC增删查改MySQL的方法，您可以使用Java编程语言中的JDBC API来实现。

相关问题

java数据库jdbc增删查改

好的，我可以为您解答这个问题。

Java中使用JDBC（Java Database Connectivity）来连接数据库，实现对数据库的增删查改操作。下面是一个简单的示例代码：

1. 建立连接

String url = "jdbc:mysql://localhost:3306/test";
String username = "root";
String password = "123456";
Class.forName("com.mysql.jdbc.Driver");
Connection conn = DriverManager.getConnection(url, username, password);

2. 插入数据

Statement stmt = conn.createStatement();
String sql = "insert into student (name, age, sex) values ('Tom', 20, 'male')";
int result = stmt.executeUpdate(sql);
if(result > 0){
    System.out.println("插入成功！");
}

3. 查询数据

Statement stmt = conn.createStatement();
String sql = "select * from student";
ResultSet rs = stmt.executeQuery(sql);
while(rs.next()){
    int id = rs.getInt("id");
    String name = rs.getString("name");
    int age = rs.getInt("age");
    String sex = rs.getString("sex");
    System.out.println(id + " " + name + " " + age + " " + sex);
}

4. 修改数据

Statement stmt = conn.createStatement();
String sql = "update student set age = 22 where id = 1";
int result = stmt.executeUpdate(sql);
if(result > 0){
    System.out.println("修改成功！");
}

5. 删除数据

Statement stmt = conn.createStatement();
String sql = "delete from student where id = 1";
int result = stmt.executeUpdate(sql);
if(result > 0){
    System.out.println("删除成功！");
}

以上是一个简单的示例，您可以根据自己的需要进行修改和扩展。

jdbc增删查改代码

以下是一个简单的JDBC增删查改的示例代码：

1. 建立数据库连接：

import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;

public class DatabaseConnection {
    private static final String URL = "jdbc:mysql://localhost:3306/mydatabase";
    private static final String USERNAME = "root";
    private static final String PASSWORD = "password";

    public static Connection getConnection() throws SQLException {
        return DriverManager.getConnection(URL, USERNAME, PASSWORD);
    }
}

2. 添加数据：

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class InsertData {
    public static void main(String[] args) {
        String sql = "INSERT INTO users (name, age) VALUES (?, ?)";
        try (Connection conn = DatabaseConnection.getConnection();
             PreparedStatement stmt = conn.prepareStatement(sql)) {
            stmt.setString(1, "John");
            stmt.setInt(2, 25);
            stmt.executeUpdate();
            System.out.println("Data inserted successfully.");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

3. 删除数据：

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class DeleteData {
    public static void main(String[] args) {
        String sql = "DELETE FROM users WHERE id = ?";
        try (Connection conn = DatabaseConnection.getConnection();
             PreparedStatement stmt = conn.prepareStatement(sql)) {
            stmt.setInt(1, 1);
            stmt.executeUpdate();
            System.out.println("Data deleted successfully.");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

4. 修改数据：

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;

public class UpdateData {
    public static void main(String[] args) {
        String sql = "UPDATE users SET age = ? WHERE id = ?";
        try (Connection conn = DatabaseConnection.getConnection();
             PreparedStatement stmt = conn.prepareStatement(sql)) {
            stmt.setInt(1, 30);
            stmt.setInt(2, 1);
            stmt.executeUpdate();
            System.out.println("Data updated successfully.");
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}

5. 查询数据：

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;

public class QueryData {
    public static void main(String[] args) {
        String sql = "SELECT * FROM users";
        try (Connection conn = DatabaseConnection.getConnection();
             PreparedStatement stmt = conn.prepareStatement(sql);
             ResultSet rs = stmt.executeQuery()) {
            while (rs.next()) {
                int id = rs.getInt("id");
                String name = rs.getString("name");
                int age = rs.getInt("age");
                System.out.println("ID: " + id + ", Name: " + name + ", Age: " + age);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}