java在Tomcat中执行脚本

Question

我创建了一个 spring boot 项目，我在本地 tomcat 上运行(我打算将其部署到网络服务器)。在这个项目中，我创建了一个 rest-service，它应该执行一个 .bat 文件。

我的休息服务看起来像这样(它们都不起作用)

@RequestMapping(value = "/esc", method= RequestMethod.GET)
public String esc() throws IOException, InterruptedException {
      String folder = "P:\\Documents\\testcmd";
    String[] cmdarray = new String[]{"cmd -c","dosomething.cmd"};
    ProcessBuilder processBuilder = new ProcessBuilder( cmdarray );
    processBuilder.directory(new File(folder));
    Process process = processBuilder.start();

    int exitCode = -1;
    boolean finished = false;
    while ( !finished ) {
        exitCode = process.waitFor();
        finished = true;
    }
    return folder;
}

@RequestMapping(value = "/ex", method= RequestMethod.GET)
public String executeShellScript(){
    //final String shCmd = "/bin/bash -c helloworld.sh";
    System.out.println("Working Directory = " +
            System.getProperty("user.dir"));
    final String shCmd = "cmd -c P:/Documents/testcmd/dosomething.cmd";
    String output = executeCommand(shCmd);

    return output;
}
private String executeCommand(String command){
    Process p;
    InputStream in = null;
    String value = "";
    try {
        p = Runtime.getRuntime().exec(command);
        in = p.getInputStream();
        int ch;
        while((ch = in.read()) != -1) {
            value = String.valueOf((char)ch);
        }
    }catch (IOException e){
        e.printStackTrace();
    }
    return value;
}

我用进程构建器和运行时进行了尝试。我要执行的文件在这个文件夹中:“P:\Documents\testcmd”

甚至可以使用 tomcat 服务器执行本地文件吗？

Answer 1

我解决了这个问题。 Runtime.getRuntime().exec(command) 的解决方案是正确的。只有我的系统调用是错误的。而不是 final String shCmd = "cmd -c P:/Documents/testcmd/dosomething.cmd"; 我不得不使用 "P:/Documents/testcmd/dosomething.cmd"。此外，我不得不更改 dosomething.cmd 因为它是错误的。当执行纯 java 代码时，该文件将打开一个 cmd 终端，然后在无限循环中打印 hello。我更改了文件内容，而不是终端中的无限循环，而是将 hello 打印到另一个文件中。

// method is mapped on root/ex
@RequestMapping(value = "/ex", method= RequestMethod.GET)
public String executeShellScript(){
    System.out.println("Working Directory = " +
            System.getProperty("user.dir"));
    final String shCmd = "P:\\Documents\\testcmd\\dosomething.cmd -c";
    String output = executeCommand(shCmd);

    return output;
}

批处理文件之前和之后

@echo off
:start
echo hallo
pause
goto start

之后

@echo off
@echo This is a test>> P:/Documents/testcmd/file.txt
@echo 123>> P:/Documents/testcmd/file.txt
@echo 245.67>> P:/Documents/testcmd/file.txt