【发布时间】:2012-01-09 01:13:03
【问题描述】:
我想从 Web 服务器运行 Dos 程序。 Dos 程序必须以交互方式运行,因为用户界面是通过一系列问题和答案来实现的。一个问题的答案将决定下一个问题。我将不得不在 Web 服务器上使用 ajax,但我想我可以做到。
我在 Stackoverflow 上找到了一个 java 程序,它似乎做了一些与我想要的类似的事情。但是,当我编译程序时,我得到一个错误,即。
javac PipeRedirection.java
PipeRedirection.java:43: package InputProcess does not exist
InputProcess.Gobbler outGobbler = new InputProcess.Gobbler(p.getInputStream());
堆栈溢出问题的url是
How can I write large output to Process getOutputStream?
Java 文件是
/*
####### PipeRedirection.java
*/
import java.io.BufferedOutputStream;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.FileReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;
public class PipeRedirection {
public static void main(String[] args) throws FileNotFoundException {
if(args.length < 2) {
System.err.println("Need at least two arguments");
System.exit(1);
}
try {
String input = null;
for(int i = 0; i < args.length; i++) {
String[] commandList = args[i].split(" ");
ProcessBuilder pb = new ProcessBuilder(commandList);
//pb.redirectErrorStream(true);
Process p = pb.start();
if(input != null) {
PrintWriter writer = new PrintWriter(new OutputStreamWriter(new BufferedOutputStream(p.getOutputStream())), true);
writer.println(input);
writer.flush();
writer.close();
}
InputProcess.Gobbler outGobbler = new InputProcess.Gobbler(p.getInputStream());
InputProcess.Gobbler errGobbler = new InputProcess.Gobbler(p.getErrorStream());
Thread outThread = new Thread(outGobbler);
Thread errThread = new Thread(errGobbler);
outThread.start();
errThread.start();
outThread.join();
errThread.join();
int exitVal = p.waitFor();
System.out.println("\n****************************");
System.out.println("Command: " + args[i]);
System.out.println("Exit Value = " + exitVal);
List<String> output = outGobbler.getOuput();
input = "";
for(String o: output) {
input += o;
}
}
System.out.println("Final Output:");
System.out.println(input);
} catch (IOException ioe) {
// TODO Auto-generated catch block
System.err.println(ioe.getLocalizedMessage());
ioe.printStackTrace();
} catch (InterruptedException ie) {
// TODO Auto-generated catch block
System.err.println(ie.getLocalizedMessage());
ie.printStackTrace();
}
}
public static class Gobbler implements Runnable {
private BufferedReader reader;
private List<String> output;
public Gobbler(InputStream inputStream) {
this.reader = new BufferedReader(new InputStreamReader(inputStream));
}
public void run() {
String line;
this.output = new ArrayList<String>();
try {
while((line = this.reader.readLine()) != null) {
this.output.add(line + "\n");
}
this.reader.close();
}
catch (IOException e) {
// TODO
System.err.println("ERROR: " + e.getMessage());
}
}
public List<String> getOuput() {
return this.output;
}
}
}
有谁知道我为什么会收到编译错误?我可以用其他代码代替 InputProcess 吗?
感谢您的帮助
彼得
【问题讨论】:
标签: java multithreading dos