You'd better use plain text messages in newsgroups.
And you should use English.
Here is the document
http://www.postgresql.org/docs/8.1/interactive/client-authentication.html.
You can try with the lines in "Example 20-1. Example pg_hba.conf entries".
(Your pg_hba.conf is not correct.)
Steps:
1.
你好：
我是 一名中国学生，正在做网格方面的东西，做到最后当我执行命令时，显示如下
2006-05-21 20:19:21,650 ERROR service.ReliableFileTransferImpl
[main,:73]Unable to setup database driver with pooling.A
connection error has occurred: FATAL: missing or erroneous
pg_hba.conf file
2006-05-21 20:19:23,213 WARN service.ReliableFileTr
