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#yyds干货盘点#Process 和 ProcessBuilder

1、使⽤Runtime

Process process = null;
BufferedReader bufferedReader = null;
String[] command = {"/bin/sh", "-c", "cd /home/test & ./test.sh"};
try {
process = Runtime.getRuntime().exec(command);
bufferedReader = new BufferedReader(new
InputStreamReader(process.getInputStream()));
String line;
while (null != (line = bufferedReader.readLine())) {
System.out.println(line);
}
process.waitFor();
}catch (IOException e) {
e.printStackTrace();
}catch (InterruptedException e) {
e.printStackTrace();
}finally {
if (null != bufferedReader) {
try {
bufferedReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != process)
process.destroy();
}

Process可以获取到三种流:标准输⼊、标准输出、标准错误输⼊(getOutputStream(),getInputStream(),

getErrorStream()),重定向到⽗进程。

注意:可能会出现标准输⼊和标准错误输⼊都有数据,如果对数据的顺序有要求,最简单的做法就是使⽤ProcessBuilder

合并两个流。

2、使⽤ProcessBuilder

相⽐Process有更多的功能,⽐如可以设置当前⼯作⽬录,还可以改变环境参数

Process process = null;
BufferedReader bufferedReader = null;
String[] command = {"/bin/sh", "-c", "cd /home/test & ./test.sh"};
try {
ProcessBuilder builder = new ProcessBuilder(command);
//合并输⼊流
builder.redirectErrorStream(true);
process = builder.start();
bufferedReader = new BufferedReader(new
InputStreamReader(process.getInputStream()));
String line;
while (null != (line = bufferedReader.readLine())) { System.out.println(line);
}
process.waitFor();
int result = process.exitValue(); //为0表⽰执⾏成功,⾮0表⽰shell执
⾏出错
System.out.println(result);
} catch (IOException e) {
e.printStackTrace();
} catch (InterruptedException e) {
e.printStackTrace();
} finally {
if (null != bufferedReader) {
try {
bufferedReader.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (null != process)
process.destroy();
}

使⽤redirectErrorStream为true,合并成⼀个流。



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