JCommander 解析命令行参数

package xxxx


import com.beust.jcommander.JCommander;
import com.beust.jcommander.Parameter;
import java.util.ArrayList;
import java.util.List;

public class JcomEx {
    @Parameter
    private List<String> parameters = new ArrayList<String>();

    @Parameter(names = { "-log", "-verbose" }, description = "Level of verbosity")
    private Integer verbose = 1;

    @Parameter(names = "-groups", description = "Comma-separated list of group names to be run")
    private String groups;

    @Parameter(names = "-debug", description = "Debug mode")
    private boolean debug = false;

    public static void main(String[] args) {
        JcomEx jct = new JcomEx();
        String[] argv = { "-log", "2", "-groups", "unit" };
        JCommander jc = new JCommander(jct, argv);
        System.out.println(jct.groups);
        System.out.println(jct.debug);
        System.out.println(jct.debug);
    }

}


输出：

unit
false
false

 

maven库：

com.beust.jcommander


在命令行上，参数key和value之间默认使用空格，也可以使用其他符号

参考：http://blog.csdn.net/navyhu/article/details/40430267

参数默认用空格分隔，但是我们也可以指定自己的分隔符，比如用“：”， “=”等，java Main -log:3
可以在参数类定义中使用@Parameter annotation指定分隔符 

 
    @Parameters(separators = "=")  public class SeparatorEqual {    @Parameter(names = "-level")    private Integer level = 2;  }
@Parameters(separators = "=")
public class SeparatorEqual {
  @Parameter(names = "-level")
  private Integer level = 2;
}