Java 执行命令行

例如 maven 打包：

File wd = new File("/bin");
Process proc = null;
try {
    proc = Runtime.getRuntime().exec("/bin/bash", null, wd);
} catch (IOException e) {
    log.error(e.getMessage(), e);
}
if (proc != null) {
    BufferedReader in = new BufferedReader(new InputStreamReader(proc.getInputStream()));
    PrintWriter out = new PrintWriter(new BufferedWriter(new OutputStreamWriter(proc.getOutputStream())), true);

    File dest = new File("/tmp/settings.xml");
    File mvn = new File("/tmp/apache-maven-3.5.4/bin/mvn");
    if (!mavenFile.exists() || !mavenFile.isDirectory() || !mvn.exists()) {
        File maven = new File("/tmp/apache-maven-3.5.4-bin.tar.gz");
        out.println("cd /tmp");
        out.println("tar zxvf /tmp/apache-maven-3.5.4-bin.tar.gz");
    }

    out.println("cd " + apiPath);       // "/tmp/extension-point-api"
    out.println("export M2_HOME=/tmp/apache-maven-3.5.4");
    out.println("export PATH=$PATH:$M2_HOME/bin");
    out.println("mvn clean deploy --settings=/tmp/settings.xml");
    out.println("exit");

    try {
        String line;
        boolean success = false;
        while ((line = in.readLine()) != null) {
            // 输出，可用来测试是否异步
            log.info(line);
            if (line.contains("BUILD SUCCESS")) {
                success = true;
                break;
            }
        }

        if (!success) {
            throw new Exception();
        }
        proc.waitFor();
    } catch (Exception e) {
        log.error(e.getMessage(), e);
        throw new Exception();
    } finally {
        in.close();
        out.close();
        proc.destroy();
    }
}

ProcessBuilder pb = new ProcessBuilder("/bin/bash");
pb.redirectErrorStream(true);
Process proc = null;
BufferedReader reader = null;
PrintWriter writer = null;

File targetDir = new File(targetPath);
if (!targetDir.exists()) {
    targetDir.mkdir();
}

try {
    proc = pb.start();
    reader = new BufferedReader(new InputStreamReader(proc.getInputStream()));
    writer = new PrintWriter(new BufferedWriter(new OutputStreamWriter(proc.getOutputStream())), true);

    List<String> bashLines = Lists.newArrayList();
    bashLines.add("cd " + rootPath);
    bashLines.add(mavenHome + "/bin/mvn clean package source:jar assembly:single -DskipTests=true");
    bashLines.add("cd target");
    bashLines.add("zip " + Constant.ZIP_JAVA_SDK_FILE_NAME + " *.jar ../*.md");
    bashLines.add("scp " + Constant.ZIP_JAVA_SDK_FILE_NAME + " " + targetPath);
    bashLines.add("exit");

    LOG.info("Shell({})", Joiner.on("\n").join(bashLines));

    for (String bashLine : bashLines) {
        writer.println(bashLine);
    }
    writer.println();

    LOG.info("{}", IOUtils.toString(reader));
    LOG.info("Finished packaging with exit code({})", proc.exitValue());

} catch (Exception e) {
    LOG.error("", e);
} finally {
    try {
        if (reader != null) {
            reader.close();
        }
        if (writer != null) {
            writer.close();
        }
    } catch (Exception e) {
        LOG.error("", e);
    }
    if (proc != null) {
        proc.destroy();
    }
}