1. 下载oracle的客户端程序包（30M）

      只需要在Oracle下载一个叫Instant Client Package的软件就可以了，这个软件不需要安装，只要解压就可以用了，很方便，就算重装了系统还是可以用的。

      下载地址：http://www.oracle.com/technology/software/tech/oci/instantclient/htdocs/winsoft.html

解压到一个目录中即可，例如c:\oracleclient

2. 配置操作系统环境变量

NLS_LANG=SIMPLIFIED CHINESE_CHINA.ZHS16GBK

TNS_ADMIN=C:\oracleclient

3. 配置连接Oracle的配置。tnsnames.ora文件到目录C:\oracleclient。可以从oracle服务器拷贝一个过来。

内容类似：

# tnsnames.ora Network Configuration File: E:\oracle\product\10.2.0\db_1\network\admin\tnsnames.ora

# Generated by Oracle configuration tools.

ORCLProduct =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = prmpatm1.asiapacific.hpqcorp.net)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = orcl)

    )

  )

ORCL122 =

  (DESCRIPTION =

    (ADDRESS = (PROTOCOL = TCP)(HOST = 16.157.133.122)(PORT = 1521))

    (CONNECT_DATA =

      (SERVER = DEDICATED)

      (SERVICE_NAME = orcl)

    )

  )

EXTPROC_CONNECTION_DATA =

  (DESCRIPTION =

    (ADDRESS_LIST =

      (ADDRESS = (PROTOCOL = IPC)(KEY = EXTPROC1))

    )

    (CONNECT_DATA =

      (SID = PLSExtProc)

      (PRESENTATION = RO)

    )

  )

4. 安装PLSQL Developer

5. 配置PLSQL Developer（第一次可以不用登录直接进到PLSQL Developer）

Tools --> Preferences--> Connections,

Oracle Home内容为 C:\oracleclient

OCI library内容为 C:\oracleclient\oci.dll

重新启动PLSQLDeveloper

完毕