VisualVM 检测不到本地JAVA程序

官方描述及解答：

Local Applications Cannot Be Monitored (Error Dialog On Startup)

Description: An
error dialog saying that local applications cannot be monitored is shown immediately after VisualVM startup.

Resolution: This can happen
on Windows systems if the username contains capitalized letters. In this case, username is

UserName

but
the jvmstat directory created by JDK is

%TMP%\hsperfdata_username

.
To workaround the problem, exit all Java applications, delete the

%TMP%\hsperfdata_username

directory
and create new

%TMP%\hsperfdata_UserName

directory.

即：把%TMP%\hsperfdata_username文件删除，重新建立%TMP%\hsperfdata_UserName文件（username为具体的用户名，区分大小写）。

%TMP%：%TMP%为用户环境变量，在cmd下echo %TMP%可以查看具体路径，或者直接在地址栏输入%TMP%直接进入文件目录。

username：cmd下echo %USERNAME%即可查看用户名。