如何在查询中传递字符串

import mysql.connector

# 连接数据库
conn = mysql.connector.connect(
    host="localhost",
    user="username",
    password="password",
    database="database_name"
)

# 创建游标
cursor = conn.cursor()

# 定义查询语句
query = "SELECT * FROM table_name WHERE column_name = %s"

# 定义字符串参数
string_param = "example"

# 执行查询
cursor.execute(query, (string_param,))

# 获取结果
result = cursor.fetchall()

# 关闭游标和连接
cursor.close()
conn.close()

import java.sql.*;

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

        try {
            // 连接数据库
            Connection conn = DriverManager.getConnection(url, username, password);

            // 创建语句对象
            Statement stmt = conn.createStatement();

            // 定义查询语句
            String query = "SELECT * FROM table_name WHERE column_name = '" + stringParam + "'";

            // 执行查询
            ResultSet rs = stmt.executeQuery(query);

            // 处理结果
            while (rs.next()) {
                // 处理每一行数据
            }

            // 关闭连接
            rs.close();
            stmt.close();
            conn.close();
        } catch (SQLException e) {
            e.printStackTrace();
        }
    }
}