android如何签入java保存记录mysql数据库中已存在字符串值

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

public class MySQLHelper {
    private static final String DB_URL = "jdbc:mysql://your_mysql_host:your_mysql_port/your_database_name";
    private static final String DB_USER = "your_mysql_username";
    private static final String DB_PASSWORD = "your_mysql_password";

    public void insertRecord(String value) {
        Connection conn = null;
        PreparedStatement stmt = null;
        try {
            // 连接数据库
            conn = DriverManager.getConnection(DB_URL, DB_USER, DB_PASSWORD);

            // 执行插入操作
            String sql = "INSERT INTO your_table_name (column_name) VALUES (?)";
            stmt = conn.prepareStatement(sql);
            stmt.setString(1, value);
            stmt.executeUpdate();
        } catch (SQLException e) {
            e.printStackTrace();
        } finally {
            // 关闭连接
            try {
                if (stmt != null) {
                    stmt.close();
                }
                if (conn != null) {
                    conn.close();
                }
            } catch (SQLException e) {
                e.printStackTrace();
            }
        }
    }
}

public class MainActivity extends AppCompatActivity {
    private Button saveButton;
    private EditText valueEditText;
    private MySQLHelper mySQLHelper;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        saveButton = findViewById(R.id.save_button);
        valueEditText = findViewById(R.id.value_edit_text);
        mySQLHelper = new MySQLHelper();

        saveButton.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                String value = valueEditText.getText().toString();
                mySQLHelper.insertRecord(value);
                Toast.makeText(MainActivity.this, "Record saved to MySQL database", Toast.LENGTH_SHORT).show();
            }
        });
    }
}