GitHub Security Lab: Java : add fastjson detection. Improve RemoteFlowSource class, support SpringMvc

This bug was reported directly to GitHub Security Lab...

SpringMVC in the XXE vulnerability testing-vulnerability warning-the black bar safety net

SpringMVC framework support for XML to Object mapping, the interior is the use of two global interface Marshaller and Unmarshaller, one implementation is to use the Jaxb2Marshaller class implementation, the class nature implements two global interfaces for XML and Object bi-directional parsing. A...