APIs Inputting and Outputting Data with PL/SQL

PL/SQL APIs for processing I/O are:
1. HTF and HTP for displaying output on a web page
EX:補上中

2. DBMS_PIPE for passing information back and forth between PL/SQL and
operating-system commands
EX:補上中

3. UTL_FILE for reading and writing operating-system files
EX:10gR2 UTL_FILE read

4. UTL_HTTP for communicating with web servers
EX:補上中

5. UTL_SMTP for communicating with mail servers
EX:10gR2 Mail service