增加String的MD5算法,修改登录借口

src/gaea/src/main/kotlin/com/synebula/gaea/extension/StringExt.kt

@@ -1,9 +1,32 @@
 package com.synebula.gaea.extension
 
+import java.math.BigInteger
+import java.security.MessageDigest
+import java.security.NoSuchAlgorithmException
+
+/**
+ * 首字母小写
+ */
 fun String.firstCharLowerCase(): String {
-    if (Character.isLowerCase(this.elementAt(0)))
-        return this
+    return if (Character.isLowerCase(this.elementAt(0)))
+        this
     else
-        return StringBuilder().append(Character.toLowerCase(this.elementAt(0)))
+        StringBuilder().append(Character.toLowerCase(this.elementAt(0)))
                 .append(this.substring(1)).toString()
-}
+}
+
+/**
+ * 获取字符串的MD值
+ */
+fun String.toMd5(): String {
+    val secretBytes = try {
+        MessageDigest.getInstance("md5").digest(this.toByteArray())
+    } catch (e: NoSuchAlgorithmException) {
+        throw RuntimeException("没有这个md5算法！")
+    }
+    var md5code = BigInteger(1, secretBytes).toString(16)
+    for (i in 0 until 32 - md5code.length) {
+        md5code = "0$md5code"
+    }
+    return md5code
+}