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leoleepsyche
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fork 一个进程 #213
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
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@@ -3,13 +3,26 @@ | |
| import java.io.File; | ||
| import java.nio.file.Path; | ||
| import java.nio.file.Paths; | ||
| import java.util.Map; | ||
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| public class Fork { | ||
| public static void main(String[] args) throws Exception { | ||
| // 请在这里使用Java代码fork一个子进程,将fork的子进程的标准输出重定向到指定文件:工作目录下名为output.txt的文件 | ||
| // 工作目录是项目目录下的working-directory目录(可以用getWorkingDir()方法得到这个目录对应的File对象) | ||
| // 传递的命令是sh run.sh | ||
| // 环境变量是AAA=123 | ||
| // 可执行程序 // 2 参数 | ||
| ProcessBuilder pb = new ProcessBuilder("sh","run.sh"); | ||
| // 工作路径 | ||
| pb.directory (getWorkingDir ()); | ||
| // 环境变量 | ||
| Map<String,String > envs = pb.environment(); | ||
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| envs.put ("AAA","123"); | ||
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| //pb.inheritIO (); | ||
| pb.redirectOutput (getOutputFile ()); | ||
| pb.start ().waitFor (); | ||
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| } | ||
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| private static File getWorkingDir() { | ||
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This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,7 @@ | ||
| AAA is: 123 | ||
| total 40 | ||
| -rw-r--r-- 1 a staff 12B Apr 29 09:53 output.txt | ||
| drwxr-xr-x 13 a staff 416B Apr 29 09:53 .. | ||
| -rw-r--r-- 1 a staff 47B Apr 29 07:38 run.sh | ||
| drwxr-xr-x 5 a staff 160B Apr 29 07:38 . | ||
| -rw-r--r-- 1 a staff 11K Apr 29 07:38 .hidden.txt |
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',' 后应有空格。