1、优化sm4_cbc加解密方法

src/main/java/com/sunyard/trans/RoundMode.java

@@ -0,0 +1,25 @@
+package com.sunyard.trans;
+
+public enum RoundMode {
+
+    ECB("ECB", 1),
+    CBC( "CBC", 2),
+    CFB( "CFB", 3),
+    OFB( "OFB", 4);
+
+    private String name;
+    private int value;
+    // 构造方法
+    private RoundMode(String name, int value) {
+        this.name = name;
+        this.value = value;
+    }
+
+    public String getName() {
+        return name;
+    }
+
+    public int getValue() {
+        return value;
+    }
+}