Java执行CMD命令

参见：https://blog.****.net/lixingshi/article/details/50467840

 public static void runtimeCommand() throws Exception {

    	Process process = Runtime.getRuntime().exec("cmd.exe /c dir");
    	int status = process.waitFor();

    	System.out.println(status);
    	InputStream in = process.getInputStream();

    	BufferedReader br = new BufferedReader(new InputStreamReader(in));
    	String line = br.readLine();
    	while(line!=null) {
    		System.out.println(line);
    		line = br.readLine();
    	}

    }　　

命令行中使用/c关闭执行完毕的窗口，否则无法获取输入流。但是在Linux下面就可以直接使用如下代码获取输入流：

Process process = Runtime.getRuntime().exec("ls");
    	int status = process.waitFor();

    	System.out.println(status);
    	InputStream in = process.getInputStream();

    	BufferedReader br = new BufferedReader(new InputStreamReader(in));
    	String line = br.readLine();
    	while(line!=null) {
    		System.out.println(line);
    		line = br.readLine();
    	}

　　还可以使用ProcessBuilder进行创建进程，这种方更灵活。代码如下：

public static void processBuilderCommand() throws Exception {

    	List<String> commands = new ArrayList<>();
    	commands.add("cmd.exe");
    	commands.add("/c");
    	commands.add("dir");
    	commands.add("E:\\flink");
	 	ProcessBuilder pb =new ProcessBuilder(commands);
	 	//可以修改进程环境变量
	 	pb.environment().put("DAXIN_HOME", "/home/daxin");
	 	System.out.println(pb.directory());

    	Process process = pb.start();
    	int status = process.waitFor();
    	System.out.println(pb.environment());

    	System.out.println(status);
    	InputStream in = process.getInputStream();

    	BufferedReader br = new BufferedReader(new InputStreamReader(in));
    	String line = br.readLine();
    	while(line!=null) {
    		System.out.println(line);
    		line = br.readLine();
    	}

    }

　　

调用java命令执行class文件并获取输出：

 public static void processBuilderCommand() throws Exception {

    	List<String> commands = new ArrayList<>();
    	commands.add("cmd.exe");
    	commands.add("/c");
    	commands.add("java HelloWorld");
	 	ProcessBuilder pb =new ProcessBuilder(commands);
	 	pb.directory(new File("C:\\Users\\liuguangxin\\oxygen--workspace\\java8\\bin\\"));//设置工作目录
    	Process process = pb.start();
    	int status = process.waitFor();

    	InputStream in = process.getInputStream();

    	BufferedReader br = new BufferedReader(new InputStreamReader(in));
    	String line = br.readLine();
    	while(line!=null) {
    		System.out.println(line);
    		line = br.readLine();
    	}

    }

　　

java   C:\\Users\\liuguangxin\\oxygen--workspace\\java8\\bin\\HelloWorld会将目录作为类名一起解析故无法执行。