out, pageContext, config, page, exception built-in objects

out objects

Output data to the client

out.print(String s);
out.println(String s);

Management response buffering

1. Clear the contents of the buffer
   clear()
2. Clear the contents of the current buffer
   clearBuffer()
3. Refresh the stream
   flush()
4. Current detection is automatically cleared when the buffer is full, or abnormal ran
   isAutoFlush()
5. Gets the size of the buffer
   getBufferSize()

Other built-in objects

• response, applicaiton, request a separate presentation in other blog,

1. Get the session range pageContext object

2. Reads configuration information web.xml config objects

3. Response or request page object

4. Gets the exception of information exception object