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Main.java

@@ -72,7 +72,7 @@ public class Main {
                 rsa = new RSA(sc.nextBigInteger(),sc.nextBigInteger(),sc.nextBigInteger());
             }
             case 2->{
-                print.println("输入密钥长度");
+                print.println("输入密钥长度,长度不小于512");
                 rsa = new RSA(sc.nextInt());
             }
         }
@@ -167,6 +167,9 @@ class RSA {
          * @param keySize 密钥大小
          */
         public RSA(int keySize){
+            if(keySize < 512){
+                System.err.println("都说了不要小于512，会报错的,重新启动程序吧");
+            }
             try {
                 KeyPairGenerator keyGenerator = KeyPairGenerator.getInstance("RSA");
                 keyGenerator.initialize(keySize);