Java 更改 user.home 系统属性
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Change user.home system property
提问by tekumara
How do I change the user.home system property from outside my java program, so that it thinks it's a different directory from D:\Documents and Settings\%USERNAME%? Via environment variables, or VM arguments?
如何从我的 java 程序外部更改 user.home 系统属性,以便它认为它与 D:\Documents and Settings\%USERNAME% 不同?通过环境变量还是 VM 参数?
采纳答案by ChssPly76
Setting VM argument should work:
设置 VM 参数应该有效:
java -Duser.home=<new_location> <your_program>
Here's a test case:
这是一个测试用例:
public class test {
public static void main(String[] args) {
System.out.println(System.getProperty("user.home"));
}
}
Tested with java 1.5.0_17 on Win XP and Linux
在 Win XP 和 Linux 上用 java 1.5.0_17 测试
java test
/home/ChssPly76
java -Duser.home=overwritten test
overwritten
回答by joecracker
If you want to set user.home
for all Java programs, you can use the special environment variable _JAVA_OPTIONS
.
如果要user.home
为所有 Java 程序设置,可以使用特殊的环境变量_JAVA_OPTIONS
。
But note that a difficult to suppress warning message will be printed.
$ export _JAVA_OPTIONS=-Duser.home=/some/new/dir
$ java test
Picked up _JAVA_OPTIONS: -Duser.home=/some/new/dir
/some/new/dir