ORA-12514: TNS:无监听器

ORA-12514: TNS:无监听器
此错误是因为listener.ora文件配置不全，解决办法：
一、加上下文中的红色代码。
二、紫色代码不能写localhost，可以是IP地址或计算机名。否则在其他电脑上访问会报此错误。


# listener.ora Network Configuration File: E:\oracle\product\10.2.0\db_1\network\admin\listener.ora
# Generated by Oracle configuration tools.

SID_LIST_LISTENER =
(SID_LIST =
(SID_DESC =
(SID_NAME = PLSExtProc)
(ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
(PROGRAM = extproc)
)
[color=red](SID_DESC =
(GLOBAL_DBNAME = ORCL)
(ORACLE_HOME = E:\oracle\product\10.2.0\db_1)
(SID_NAME = ORCL)
)[/color] )

LISTENER =
(DESCRIPTION_LIST =
(DESCRIPTION =
(ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))
(ADDRESS = (PROTOCOL = TCP)(HOST = [color=violet]192.168.1.142[/color])(PORT = 1521))
)
)