package chuankou;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.util.Properties;
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/**
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* 负责将串口调试相关配置持久化到 set.properties 文件。
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*/
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public final class SerialPortPreferences {
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private static final String PROPERTIES_FILE = "set.properties";
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private static final String KEY_PORT = "serialPortName";
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private static final String KEY_BAUD = "serialBaudRate";
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private static final String KEY_AUTO = "serialAutoConnect";
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private static final int DEFAULT_BAUD = 115200;
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private SerialPortPreferences() {
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}
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public static String getPortName() {
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return readProperty(KEY_PORT);
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}
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public static void setPortName(String portName) {
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writeProperty(KEY_PORT, sanitizeString(portName));
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}
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public static int getBaudRate() {
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String value = readProperty(KEY_BAUD);
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if (value == null) {
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return DEFAULT_BAUD;
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}
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try {
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return Integer.parseInt(value.trim());
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} catch (NumberFormatException ex) {
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return DEFAULT_BAUD;
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}
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}
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public static void setBaudRate(int baudRate) {
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writeProperty(KEY_BAUD, String.valueOf(baudRate));
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}
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public static boolean isAutoConnectEnabled() {
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String value = readProperty(KEY_AUTO);
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if (value == null) {
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return true; // 默认开启
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}
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return Boolean.parseBoolean(value.trim());
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}
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public static void setAutoConnectEnabled(boolean enabled) {
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writeProperty(KEY_AUTO, Boolean.toString(enabled));
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}
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private static String readProperty(String key) {
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Properties props = new Properties();
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try (FileInputStream in = new FileInputStream(PROPERTIES_FILE)) {
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props.load(in);
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String value = props.getProperty(key);
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if (value == null || value.trim().isEmpty() || "-1".equals(value.trim())) {
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return null;
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}
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return value.trim();
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} catch (IOException ex) {
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return null;
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}
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}
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private static void writeProperty(String key, String value) {
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synchronized (SerialPortPreferences.class) {
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Properties props = new Properties();
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try (FileInputStream in = new FileInputStream(PROPERTIES_FILE)) {
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props.load(in);
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} catch (IOException ignored) {
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// 文件不存在时使用空配置
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}
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if (value == null || value.trim().isEmpty()) {
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props.setProperty(key, "-1");
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} else {
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props.setProperty(key, value.trim());
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}
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try (FileOutputStream out = new FileOutputStream(PROPERTIES_FILE)) {
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props.store(out, "Serial Port Preferences Updated");
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} catch (IOException ex) {
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System.err.println("保存串口配置失败: " + ex.getMessage());
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}
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}
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}
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private static String sanitizeString(String value) {
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if (value == null) {
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return null;
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}
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String trimmed = value.trim();
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return trimmed.isEmpty() ? null : trimmed;
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}
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}
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