写一个JDBC类连接数据库work327中的user表

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

public class JDBCConnection {
private Connection conn = null;
private Statement stmt = null;
private ResultSet rs = null;

public JDBCConnection() {
try {
// 加载驱动
Class.forName("com.mysql.jdbc.Driver");
// 获取连接
conn = DriverManager.getConnection("jdbc:mysql://localhost:3306/work327", "root", "password");
// 创建Statement对象
stmt = conn.createStatement();
} catch (ClassNotFoundException e) {
e.printStackTrace();
} catch (SQLException e) {
e.printStackTrace();
}
}

// 查询所有用户信息
public void queryAllUsers() {
String sql = "SELECT * FROM user";
try {
rs = stmt.executeQuery(sql);
while (rs.next()) {
int id = rs.getInt("id");
String name = rs.getString("name");
String password = rs.getString("password");
System.out.println("id: " + id + ", name: " + name + ", password: " + password);
}
} catch (SQLException e) {
e.printStackTrace();
}
}

// 关闭资源
public void close() {
try {
if (rs != null) {
rs.close();
}
if (stmt != null) {
stmt.close();
}
if (conn != null) {
conn.close();
}
} catch (SQLException e) {
e.printStackTrace();
}
}
}