我希望从Groovy程序中执行foo.bat,并将结果进程的输出重定向到stdout。Java或Groovy代码示例都可以。
foo.bat可能需要几分钟的时间才能运行并生成大量输出,因此我希望在生成输出时立即看到输出,而不是等到进程完成后才立即看到所有输出。
发布于 2009-11-14 07:17:47
它使用一个类来读取执行程序生成的所有输出,并将其显示在自己的stdout中。
class StreamGobbler extends Thread {
InputStream is;
// reads everything from is until empty.
StreamGobbler(InputStream is) {
this.is = is;
}
public void run() {
try {
InputStreamReader isr = new InputStreamReader(is);
BufferedReader br = new BufferedReader(isr);
String line=null;
while ( (line = br.readLine()) != null)
System.out.println(line);
} catch (IOException ioe) {
ioe.printStackTrace();
}
}
}
Runtime rt = Runtime.getRuntime();
Process proc = rt.exec("javac");
//output both stdout and stderr data from proc to stdout of this process
StreamGobbler errorGobbler = new StreamGobbler(proc.getErrorStream());
StreamGobbler outputGobbler = new StreamGobbler(proc.getInputStream());
errorGobbler.start();
outputGobbler.start();
proc.waitFor();
发布于 2014-04-29 19:49:33
使用inheritIO()方法将所有流重定向到标准输出非常简单。这会将输出打印到运行此命令的进程的stdout中。
ProcessBuilder pb = new ProcessBuilder("command", "argument");
pb.directory(new File(<directory from where you want to run the command>));
pb.inheritIO();
Process p = pb.start();
p.waitFor();
还存在其他方法,如下面提到的。这些单独的方法将帮助仅重定向所需的流。
pb.redirectInput(Redirect.INHERIT)
pb.redirectOutput(Redirect.INHERIT)
pb.redirectError(Redirect.INHERIT)
发布于 2014-01-29 08:36:54
如果你想用更多的Groovy和更少的java来做这件事,这将打印每一行:
def cmd = "./longRunningProcess"
def process = cmd.execute()
process.in.eachLine { line -> println line }
或者,如果您想同时看到stdout和stderr
def cmd = "./longRunningProcess"
def process = cmd.execute()
process.waitForProcessOutput( System.out, System.err )
https://stackoverflow.com/questions/1732455
复制相似问题