java向mysql存储过程传字符串

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

public class CallStoredProcedure {
    public static void main(String[] args) {
        String url = "jdbc:mysql://localhost:3306/mydatabase";
        String user = "username";
        String password = "password";

        try (Connection conn = DriverManager.getConnection(url, user, password)) {
            // 定义存储过程名和参数
            String sql = "{call my_procedure(?, ?)}";
            try (CallableStatement stmt = conn.prepareCall(sql)) {
                // 设置输入参数（字符串类型）
                stmt.setString(1, "Hello, MySQL!");

                // 注册输出参数（如果有的话）
                // stmt.registerOutParameter(2, java.sql.Types.VARCHAR);

                // 执行存储过程
                stmt.execute();

                // 获取输出参数的值（如果有的话）
                // String outputParam = stmt.getString(2);
                // System.out.println("Output parameter: " + outputParam);
            }
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}