今天用Mac连接VMware Fusion虚拟机数据库，突然想用EM，忽然发现确定按键为乱码。如下图：
分析：解决问题就是找到正确的字体。
处理方法：
1. 通过Windows机器c:\windows\fonts下找到simsun.ttc 这样的字体文件。
2. 在$Oracle_home/jdk/jre/lib/fonts 目录下新建文件夹，名字为fallback
[oracle@test ~]$ cd $ORACLE_HOME/jdk/jre/lib/fonts/
[oracle@test fonts]$ mkdir fallback
3. 将simsun.ttc上传到linux机器刚刚建立的fallback目录中并改名为simsum.ttf
ftp上传省略
[oracle@test fallback]$ ls
simsun.ttc
[oracle@test fallback]$ mv simsun.ttc simsun.ttf
[oracle@test fallback]$ ls
simsun.ttf
4. 清理cache
[oracle@test fallback]$ cd /11g/app/oracle/product/11.1.0/dbhome_1/oc4j/j2ee/oc4j_applications/applications/em/em/cabo/images/cache/zhs/
[oracle@test zhs]$ ls
b049hVl.imx b498zwk.imx b70gpYl.imx bb5DgWk-2.imx bb5DgWk.imx beeJtrj.imx
b0byrAl.imx b54Gjjk.imx b8f_7mj.imx bb5DgWk-3.gif bb5e67kMn.imx bf8f3pRUd.imx
b11ZkGl.imx b5b-vtk.imx ba936LkSR.imx bb5DgWk-3.imx bbaGAYl.imx t00MaF3.imx
b2549BKrI.imx b61CMCk.imx bb06006NO.imx bb5DgWk-4.gif bbcbaZ4nV.imx t0MaF3.imx
b48tkDl.imx b6956szjB.imx bb5DgWk-1.imx bb5DgWk-4.imx beaVDSk.imx
[oracle@test zhs]$ rm -rf *.gif
5. 重新启动EM
[oracle@test zhs]$ emctl status dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://test:1158/em/console/aboutApplication
Oracle Enterprise Manager 11g is running.
------------------------------------------------------------------
Logs are generated in directory /11g/app/oracle/product/11.1.0/dbhome_1/test_orcl/sysman/log
[oracle@test zhs]$ emctl stop dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://test:1158/em/console/aboutApplication
Stopping Oracle Enterprise Manager 11g Database Control ...
... Stopped.
[oracle@test zhs]$ emctl start dbconsole
Oracle Enterprise Manager 11g Database Control Release 11.2.0.1.0
Copyright (c) 1996, 2009 Oracle Corporation. All rights reserved.
https://test:1158/em/console/aboutApplication
Starting Oracle Enterprise Manager 11g Database Control ................... started.
------------------------------------------------------------------
Logs are generated in directory /11g/app/oracle/product/11.1.0/dbhome_1/test_orcl/sysman/log
[oracle@test zhs]$
6. 打开EM，字体恢复中文正常
总结：虽然是个字体的问题，但是这里面覆盖的内容还是挺多的，本人也是通过借鉴他人的文章才处理的这么快，感谢分享文章的朋友们，又处理完个新问题，好happy。