支持从文件中读取 BCEL 代码

README.md

@@ -11,12 +11,12 @@
 > 使用Decode功能会自动在当前目录下生成**Decoded.class**, 由于BCEL编码存在$符号，请使用***单引号***对代码进行包裹
 
 ```shell
-
-Decode:
+Decode from string in args:
 java -jar BCELCodeman.jar d [BCEL_CODE]
+Decode from file path:
+java -jar BCELCodeman.jar df [BCEL_Filepath]
 Encode:
 java -jar BCELCodeman.jar e [Class_Filepath]
-
 ```
 
 ![命令行使用示例](./screenshot/jar_example.png)

src/Main.java

@@ -12,17 +12,22 @@
 public class Main {
     public static void main(String[] args) {
         String helpMsg = "---------Example---------\n"
-                        + "Decode:\n"
-                        + "java -jar BCELCodeman.jar d [BCEL_CODE]\n"
-                        + "Encode:\n"
-                        + "java -jar BCELCodeman.jar e [Class_Filepath]\n\n"
-                        + "  -=Coding By F1tz=-";
+                + "Decode from string in args:\n"
+                + "java -jar BCELCodeman.jar d [BCEL_CODE]\n"
+                + "Decode from file path:\n"
+                + "java -jar BCELCodeman.jar df [BCEL_Filepath]\n"
+                + "Encode:\n"
+                + "java -jar BCELCodeman.jar e [Class_Filepath]\n\n"
+                + "  -=Coding By F1tz=-";
         try{
             switch (args[0]){
                 case "d" :
                     String bcelCode = args[1];
                     decode(bcelCode);
                     break;
+                case "df" :
+                    decode(new String(Files.readAllBytes(Paths.get(args[1]))));
+                    break;
                 case "e" :
                     String classPath = args[1];
                     encode(classPath);
@@ -31,8 +36,8 @@ public static void main(String[] args) {
                     System.out.println(helpMsg);
             }
         }catch (Exception e){
+            e.printStackTrace();
             System.out.println(helpMsg);
-            return;
         }
     }