diff --git a/src/main/ets/utils/Base64Helper.ets b/src/main/ets/utils/Base64Helper.ets
index e4f82ee..71da0a6 100644
--- a/src/main/ets/utils/Base64Helper.ets
+++ b/src/main/ets/utils/Base64Helper.ets
@@ -68,4 +68,70 @@ export class Base64Helper {
     let result = base64.decodeSync(array, options);
     return result;
   }
+
+
+  static baseEncode(str: string): string {
+    return Base64Helper.base64Encode(Base64Helper.utf16to8(str))
+  }
+
+
+  static base64Encode(str: string) {
+    // 下面是64个基本的编码
+    let base64EncodeChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/'
+    let out: string
+    let i: number
+    let len: number
+    let c1: number
+    let c2: number
+    let c3: number
+    len = str.length
+    i = 0
+    out = ''
+    while (i < len) {
+      c1 = str.charCodeAt(i++) & 0xff
+      if (i === len) {
+        out += base64EncodeChars.charAt(c1 >> 2)
+        out += base64EncodeChars.charAt((c1 & 0x3) << 4)
+        out += '=='
+        break
+      }
+      c2 = str.charCodeAt(i++)
+      if (i === len) {
+        out += base64EncodeChars.charAt(c1 >> 2)
+        out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4))
+        out += base64EncodeChars.charAt((c2 & 0xF) << 2)
+        out += '='
+        break
+      }
+      c3 = str.charCodeAt(i++)
+      out += base64EncodeChars.charAt(c1 >> 2)
+      out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4))
+      out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6))
+      out += base64EncodeChars.charAt(c3 & 0x3F)
+    }
+    return out
+  }
+
+  static utf16to8(str: string) {
+    let out: string
+    let i: number
+    let len: number
+    let c: number
+    out = ''
+    len = str.length
+    for (i = 0; i < len; i++) {
+      c = str.charCodeAt(i)
+      if ((c >= 0x0001) && (c <= 0x007F)) {
+        out += str.charAt(i)
+      } else if (c > 0x07FF) {
+        out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F))
+        out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F))
+        out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F))
+      } else {
+        out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F))
+        out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F))
+      }
+    }
+    return out
+  }
 }
\ No newline at end of file