diff --git a/src/main/java/org/aohe/Main.java b/src/main/java/org/aohe/Main.java
index b13f548..d0e6cd7 100644
--- a/src/main/java/org/aohe/Main.java
+++ b/src/main/java/org/aohe/Main.java
@@ -13,13 +13,15 @@ import javax.swing.*;
 
 import org.aohe.constant.Control;
 
+import java.nio.file.Paths;
+
 @Slf4j
 public class Main {
 
     private static final String JAVA_IO_TMPDIR = System.getProperty("java.io.tmpdir");
 
     public static void main(String[] args) throws Exception {
-        AppLocker locker = AppLocker.create("aoheSaneServiceLock").build();
+        AppLocker locker = AppLocker.create("aoheSaneServiceLock").setPath(Paths.get(JAVA_IO_TMPDIR)).build();
         UIManager.setLookAndFeel(new FlatDarculaLaf());
         try {
             locker.lock();
@@ -39,7 +41,5 @@ public class Main {
         TrayFrameUtf8.initSystemTrayUTF8();
     }
 
-    private void logLocking(String message) {
-        log.info("{}", message);
-    }
+
 }
\ No newline at end of file
diff --git a/src/main/java/org/aohe/control/Operational.java b/src/main/java/org/aohe/control/Operational.java
index 0b4147c..161b530 100644
--- a/src/main/java/org/aohe/control/Operational.java
+++ b/src/main/java/org/aohe/control/Operational.java
@@ -16,9 +16,6 @@ import java.util.*;
 @Slf4j
 public class Operational {
 
-    
-    private static TwainScanner scanner = null;
-
     public static String selectOperational(String path) {
         JSONObject json = JSONObject.parse(path);
 
@@ -60,7 +57,12 @@ public class Operational {
             r = R.ok(WebCamUtils.getWebcams());
         }else if ("002002".equals(function)){
             //设置webcam
-            WebCamUtils.setWebcam(param.getString("name"));
+            Integer id = param.getInteger("id");
+            if(id != null){
+                WebCamUtils.setWebcam(id);
+            }else{
+                WebCamUtils.setWebcam(param.getString("name"));
+            }
             r = R.ok(WebCamUtils.getViewSizes());
         }else if("002003".equals(function)){
             //获取摄像头分辨率
@@ -126,7 +128,7 @@ public class Operational {
      * 选中某一获取到的扫描仪
      * @return R<boolean> -> success
      */
-    public static R setScanner(String name) throws TwainException, InterruptedException {
+    public static R setScanner(String name) throws TwainException {
         if(name == null || name.isEmpty()){
             return R.fail("扫描仪名字为空");
         }
@@ -216,9 +218,8 @@ public class Operational {
      * @param name 扫描仪名称
      * @param systemUI 是否使用打印机自带UI
      * @return R
-     * @throws TwainException default error
      */
-    public static R startScan(String name, boolean systemUI ) throws TwainException {
+    public static R startScan(String name, boolean systemUI ) {
         Source source = new Source();
         source.setName(name);
         source.setSystemUI(systemUI);
diff --git a/src/main/java/org/aohe/webcam/WebCamUtils.java b/src/main/java/org/aohe/webcam/WebCamUtils.java
index f0c3e77..749d348 100644
--- a/src/main/java/org/aohe/webcam/WebCamUtils.java
+++ b/src/main/java/org/aohe/webcam/WebCamUtils.java
@@ -61,6 +61,18 @@ public class WebCamUtils {
         webcam = initWebcam();
     }
 
+    /**
+     * 设置摄像头
+     * @param id
+     */
+    public static void setWebcam(int id){
+        if(webcam!=null && webcam.isOpen()){
+            webcam.close();
+        }
+        webcam = Webcam.getWebcams().get(id);
+        webcam = initWebcam();
+    }
+
     /**
      * 获取摄像头列表
      * @return