怎么让一个java程序接收命令后重启

Question

1 一个web程序部署在tomcat程序中,
怎么让程序接受重启命令后重启

Answer 1

You can make an independent interface service and execute a start and stop script, so that you can achieve the effect you want

Answer 2

Directly use java to call the system command to restart tomcat
The code is probably like this:

public static void runShell(final String cmd) throws IOException, InterruptedException {
        executorService.execute(new Runnable() {
            @Override
            public void run() {
                try {
                    Runtime run = Runtime.getRuntime();
                    Process p = run.exec(cmd);
                    BufferedInputStream in = new BufferedInputStream(p.getInputStream());
                    BufferedReader inBr = new BufferedReader(new InputStreamReader(in));
                    String lineStr;
                    while ((lineStr = inBr.readLine()) != null) {
                        logger.info(lineStr);// 打印输出信息
                    }

                    //检查命令是否执行失败。
                    if (p.waitFor() != 0) {
                        if (p.exitValue() == 1) {// 0表示正常结束，1：非正常结束
                            logger.error(cmd + "命令执行失败!");
                        }
                    }
                    inBr.close();
                    in.close();
                } catch (Exception e) {
                    logger.error("调用系统命令失败！", e);
                }
            }
        });

    }

Answer 3

Restarting the web program is nothing more than ending the process, executing the system exit 4 function, and then executing the main method to start the container. This program must be independent