不过没有试过Windows下运行，试了一下，还是不错的，把代码做了一些调整，封装成对象，这样更方便多线程下调用，不用担心静态变量互相干扰的问题。

先看一下怎么用：

public static void main(String[] args) {
try {
Command command = new Command();
CommandResult result1 = command.exec("net stop nginx", 20000);
System.out.println("command executiion succeeds: " + result1.getOutput());
CommandResult result2 = command.exec("net start nginx", 20000);
System.out.println("command executiion succeeds: " + result2.getOutput());
} catch (CommandError ex) {
System.out.println("command execution failed: " + ex.getMessage());
}
}

由此可见，有三个类：Command, CommandResult和CommandError。

当命令不能运行，将会抛出CommandError异常对象。如果命令能够运行，不管是否成功或者失败，都返回CommandResult对象，里面有两个属性output和error，包含了执行成功的消息和错误消息。

CommandError.java代码：

package command;

/**
*
* @author shu6889
*/
public class CommandError extends Exception {

/**
* Creates a new instance of
* CommandError without detail message.
*/
public CommandError() {
}

/**
* Constructs an instance of
* CommandError with the specified detail message.
*
* @param msg the detail message.
*/
public CommandError(String msg) {
super(msg);
}

public CommandError(Throwable ex) {
super(ex);
}
}

CommandResult.java代码

package command;

/**
* Describe class CommandResult here.
*
*/
public class CommandResult {
public static final int EXIT_VALUE_TIMEOUT=-1;

private String output;

void setOutput(String error) {
output=error;
}

public String getOutput(){
return output;
}

int exitValue;

void setExitValue(int value) {
exitValue=value;
}

int getExitValue(){
return exitValue;
}

private String error;

/**
* @return the error
*/
public String getError() {
return error;
}

/**
* @param error the error to set
*/
public void setError(String error) {
this.error = error;
}
}