Map of Shanghai:
At the tab "how to move around China" inside the Smart Route of China, you will find of the information about public transport in Shanghai including a tube's map.
You will also need a map of the city, but it is so big that you cannot print it. That is why we recommend you to pick up a free map at the Tourist Office you will find at the airport. In case you forget to do so, the city is plenty of Tourist Center (you can find the main one, Shanghai Information Center for International Visitors (SICIV), at Xingye Rd, Lu Wan Qu).
Meanwhile and to help you to have an idea of the city here you can download in PDF a couple of maps of Shanghai (whole city and city center):