*.exe 路径和参数中的 Windows 空间中的 java ProcessBuilder

Question

经常讨论，但这似乎是一个奇怪的边缘案例。

在win cmd.exe中我成功运行：

"c:\Program Files\myapp.exe" -my_arg="sth. with space"

和

"c:\Program Files\myapp.exe" -my_arg="sth_without_space"

在 java ProcessBuilder.command(xxx) 中，以下失败，“c:\Program”不是有效命令（xxx 包含以下数组）：

// using cmd.exe:
["cmd.exe", "/c", "c:\Program Files\myapp.exe", "-my_arg=sth. with space"]         // no extra quoting
["cmd.exe", "/c", "\"c:\Program Files\myapp.exe\"", "-my_arg=sth. with space"]     // exe       quoted
["cmd.exe", "/c", "\"c:\Program Files\myapp.exe\"", "-my_arg=\"sth. with space\""] // exe & arg quoted
["cmd.exe", "/c", "c:\Program Files\myapp.exe", "-my_arg=\"sth. with space\""]     //       arg quoted

// putting all as cmd.exe arg:
["cmd.exe", "/c", "c:\Program Files\myapp.exe -my_arg=sth. with space"]            // no extra quoting
["cmd.exe", "/c", "\"c:\Program Files\myapp.exe\" -my_arg=sth. with space"]        // exe       quoted
["cmd.exe", "/c", "\"c:\Program Files\myapp.exe\" -my_arg=\"sth. with space\""]    // exe & arg quoted
["cmd.exe", "/c", "c:\Program Files\myapp.exe -my_arg=\"sth. with space\""]        //       arg quoted

// calling *.exe directly
["c:\Program Files\myapp.exe", "-my_arg=sth. with space"]                          // no extra quoting
["\"c:\Program Files\myapp.exe\"", "-my_arg=sth. with space"]                      // exe       quoted
["\"c:\Program Files\myapp.exe\"", "-my_arg=\"sth. with space\""]                  // exe & arg quoted
["c:\Program Files\myapp.exe", "-my_arg=\"sth. with space\""]                      //       arg quoted

运行正常：

["cmd.exe", "/c", "c:\Program Files\myapp.exe", "-my_arg=sth_without_space"]

当 *.exe 路径和 arg 包含空格时，问题似乎就开始了。

[编辑]： 我的问题是：如何在 exe 的路径和 arg 的内容中使用空格来运行它？

Answer 1

要使其与 cmd 和 WITH 空格一起工作，您需要添加另一层引用。

毕竟你写了一个java程序。 java 编译器将期望字符串被引用，但在运行时这些引号不再存在。一些字符串将用于启动 cmd，其他将传递给 cmd。

Cmd 本身会检查它收到的参数并解析它们。要标记哪个空格是分隔符，哪个不是，您需要使用引号。 Cmd 将理解这些引号并删除它们 - 被调用的程序不再注意到它们。

所以要么添加更多引号（正确转义），要么尝试直接运行可执行文件。

["cmd.exe", "/c", "\"c:\\Program Files\\myapp.exe\"", "\"-my_arg=sth_with space\""]