在Websphere6.0下面新增一个MIME_TYPE

在WAS控制台上:

If you are using WebSphere Application Server, perform the following steps to configure WebSphere Application Server 
to support the PNG MIME type:
1.Log in to the WebSphere Application Server Administrative Console.
2.Expand Environments  Virtual Hosts.Select default_host.Select MIME Types under Additional Properties.

Click New.
3.Enter image/png as the value for the MIME Type field.
Enter png as the value for the Extension field.
4.Click OK to save the new MIME type.

Save the configuration changes.