Question

我一直在寻找一个很好的例子来编写Process output＆amp;错误流到日志文件。我使用apache-commons exec库来执行我的进程。按照代码示例来演示

public static int executeCommand(CommandLine command, Logger log) throws ExecuteException, IOException {
    DefaultExecutor executor = new DefaultExecutor();
    executor.setExitValue(0);

    PumpStreamHandler psh = new PumpStreamHandler();
    executor.setStreamHandler(psh);

    return executor.execute(command);
}

Answer 1

以下是实现此目的的代码。

class ExecLogHandler extends LogOutputStream {
    private Logger log;

    public ExecLogHandler(Logger log, Level logLevel) {
        super(logLevel.toInt());
        this.log = log;
    }

    @Override
    protected void processLine(String line, int logLevel) {
        log.log(Level.toLevel(logLevel), line);
    }
}

这就是我们如何使用上述类。

public static int executeCommand(CommandLine command, Logger log) throws ExecuteException, IOException {
    DefaultExecutor executor = new DefaultExecutor();
    executor.setExitValue(0);

    PumpStreamHandler psh = new PumpStreamHandler(new ExecLogHandler(log, Level.DEBUG), new ExecLogHandler(log, Level.ERROR));
    executor.setStreamHandler(psh);

    return executor.execute(command);
}

使用像这样的apache-commons exec会产生代码和代码。生活（程序员）如此简单。我能够丢弃大量使用Runtime.exec执行命令行命令的代码。

写作输出＆amp;使用PumpStreamHandler记录文件时出错

1 个答案: