fix bug

@@ -47,11 +47,9 @@ public class LoginServiceImpl implements ILoginService{
             return null;
         }else{
             String salt = admin.getSalt();
-            String adminType = Integer.toString(admin.getType());
-            String str = admin.getAccount() + password + adminType + salt; // 构建待加密字符串
-            String calcuPass = SecurityTool.encode(SecurityTool.ALGORITHM_MD5, str);
             String pass_in_db = admin.getPwd();
-            if (!calcuPass.equals(pass_in_db))//密码错误
+            String pass = SecurityTool.getPassword(username, password, salt);
+            if (!pass.equals(pass_in_db))//密码错误
                 return null;
         }
         return admin;