Hello, I will be staying at the Hilton in Shanghai on July 11, 2013 located on No. 250 Hua Shan Road. How close will the Maglev Train take me to the holtel

It is about 17 ot 18km between your hotel and Longyang Road Station (the maglev train station in the city).
From Longyang Road Station, you can take the local subway line 2 to reach Jing'an Temple Station. Get out of the station from Exit 9, you can walk along Yanan Middle Road to Huashan Road where you can find your hotel easily.