Java執行CMD命令

參見：https://blog.csdn.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關閉執行完畢的窗口，否則無法獲取輸入流。但是在Linux下面就可以直接使用如下代碼獲取輸入流：

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();
    	}

　　還可以使用ProcessBuilder進行創建進程，這種方更靈活。代碼如下：

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);
	 	//可以修改進程環境變量
	 	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();
    	}
    	
    }
    

　　

調用java命令執行class文件並獲取輸出：

 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\\"));//設置工作目錄
    	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會將目錄作為類名一起解析故無法執行。