Failed to load the sqljdbc_auth.dll cause :- no sqljdbc_auth in java.library.path

First , download the latest version of jdbc driver from following address:

http://www.microsoft.com/zh-cn/download/details.aspx?id=11774

click the application you have downloaded .

Copy sqljdbc_auth.dll file from directory "....Microsoft JDBC Driver 4.1 for SQL Server\sqljdbc_4.1\chs\auth\x86"   to  java.library.path

You can print java.library.path by following code:

System.out.println(System.getProperty("java.library.path")); 

There must be one path works.