在java中使用命令行接受文件名

Question

我试图通过命令行接受3个文件名。这是我尝试但不工作的代码.. ??请帮忙

public class MedicalStudentMatcher {

enum Arguments {
    HospitalFile, ResidentFile, OutputFile
};

/**
 * @param args
 */
public static void main(String[] args) {

    //Retrieve file locations from command line arguments
    String hospitalFile = "";
    String residentFile = "";
    String outFile = "";


    if (args.length > 2){
        hospitalFile = args[Arguments.HospitalFile.ordinal()];
        residentFile = args[Arguments.ResidentFile.ordinal()];
        outFile = args[Arguments.OutputFile.ordinal()];
    } else {
        System.out
                .println("Please include names for the preference files and output file when running the application.\n "
                        + "Usage: \n\tjava MedicalStudentMatcher hospital.csv student.csv out.txt\n");
        return;
    }

Answer 1

做一些调试。打印命令行参数的长度以及每个参数

类似的东西：

System.out.println(args.length);

for(String arg: args)
{
   System.out.println(arg);
}

通过这种方式，您将看到您作为参数传递给程序的内容。