转义属性文件java中的特殊字符

Question

I have key, value in properties file like this proj.path=${HOME}/dir . I have both environment variable and directory also with ${HOME} .

In my case I would like to use it as directory path only but when I read this from file it is getting replaced with environment variable value (home/user/dir) .

I tried to escape it like proj.path=\\\\$\\\\{HOME\\\\}/dir but in code it is coming like \\$\\{HOME\\}/dir

Required output is ${HOME}/dir .

EDIT:

Prop file:

proj.path=${HOME}/dir,some/dir/dir2

I am accessing in spring like below.

@Value("#{'${proj.path}'.split(',')}") private List<String> customPaths;

Answer 1

One way of escaping the ${HOME} value is by wrapping the $ character in an expression and changing the type from List<String> to String[] .

proj.path=#{'$'}{HOME}/dir,some/dir/dir2

@Value("${proj.path}")
private String[] customPaths;