我正在尝试将命令行参数解析为
Options options = new Options();
options.addOption("c", "count", false, "number of message to be generated");
options.addOption("s", "size", false, "size of each messages in bytes");
options.addOption("t", "threads", false, "number of threads");
options.addOption("r", "is random", false, "is random");
CommandLine cli = new DefaultParser().parse(options, args);
int count = Integer.parseInt(cli.getOptionValue("c", "20000000"));
// int count = Integer.parseInt(cli.getOptionValue("c", "100"));
int recordSize = Integer.parseInt(cli.getOptionValue("s", "512"));
int threads = Integer.parseInt(cli.getOptionValue("t","4"));
boolean isRandom = Boolean.valueOf(cli.getOptionValue("r", "true"));
System.out.println(" threads "+threads);
System.out.println(" count "+count);
我在 Eclipse 中运行它
t 6 c 7
但我总是得到
threads 4
count 20000000
我错过了什么?
最佳答案
当选项带有参数时,您应该对 addOption
方法使用 true
。来自 Javadoc:
- @param hasArg flag signally if an argument is required after this option
options.addOption("c", "count", true, "number of message to be generated");
options.addOption("s", "size", true, "size of each messages in bytes");
options.addOption("t", "threads", true, "number of threads");
options.addOption("r", "is random", false, "is random");
是的,对于短选项规范(例如 -t 4
)需要一个前导 -
,对于短选项规范需要一个前导 --
长选项规范(例如 --threads 4
)。
关于Java CLI : Cant parse arguments,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/37466071/