Question

我想要做的是让它在程序运行时以普通的方式运行，但如果用户选择他们希望显示在html中，那么它将运行普通程序会做的但不是将它显示在控制台中，它会将控制台中显示的内容写入用户指定的html文件中。这可能吗？我有代码接受用户输入并让他们指定他们想要的格式以及打开浏览器，但我不确定这是否可行。我的代码如下：

import java.awt.Desktop;
import java.io.*;
import java.util.*;

public class reader {
    static int validresults = 0;
    static int invalidresults = 0;
    // Used to count the number of invalid and valid matches

    public static boolean verifyFormat(String[] words) {
        boolean valid = true;

        if (words.length != 4) { 
            valid = false;
        } else if (words[0].isEmpty() || words[0].matches("\\s+")) {
            valid = false;
        } else if ( words[1].isEmpty() || words[1].matches("\\s+")) {
            valid = false;
        }

        return valid && isInteger(words[2]) && isInteger(words[3]);}

    // Checks to see that the number of items in the file are equal to the four needed and the last 2 are integers
    // Also checks to make sure that there are no results that are just whitespace
    public static boolean isInteger(String input) {
        try {
            Integer.parseInt(input);
            return true;
        }
        catch (Exception e) {
            return false;
        }
    }
    // Checks to make sure that the data is an integer

    public static void main(String[] args) throws IOException {
        Scanner sc = new Scanner(System.in);

        while (true) { // Runs until it is specified to break
            Scanner scanner = new Scanner(System.in);

            System.out.println("Enter filename");
            String UserFile = sc.nextLine();
            File file = new File(UserFile);

            if (!file.exists()) {
              continue;
            }

            if (UserFile != null && !UserFile.isEmpty()){ 
                System.out.println("Do you want to generate plain (T)ext or (H)TML");
                String input = scanner.nextLine();
                if (input.equalsIgnoreCase("H")) {
                    Desktop.getDesktop().browse(file.toURI());
                } else if (input.equalsIgnoreCase("T")) {
                      processFile(UserFile);
                } else {
                    System.out.println("Do you want to generate plain (T)ext or (H)TML");
                }
            }
          }
        }

    // Checks how the user wants the file to be displayed 
    private static void processFile(String UserFile) throws FileNotFoundException {
        String hteam;
        String ateam;
        int hscore;
        int ascore;
        int totgoals = 0;

        Scanner s = new Scanner(new BufferedReader(
                new FileReader(UserFile))).useDelimiter("\\s*:\\s*|\\s*\\n\\s*");

        while (s.hasNext()) {
            String line = s.nextLine();
            String[] words = line.split("\\s*:\\s*");
            // Splits the file at colons

            if(verifyFormat(words)) {
                hteam = words[0];       // read the home team
                ateam = words[1];       // read the away team
                hscore = Integer.parseInt(words[2]);       //read the home team score
                totgoals = totgoals + hscore;
                ascore = Integer.parseInt(words[3]);       //read the away team score
                totgoals = totgoals + ascore;
                validresults = validresults + 1;

                System.out.println(hteam + " " +  "[" + hscore + "]" +  " " + "|" + " " + ateam + " " + "[" + ascore + "]");   
                // Output the data from the file in the format requested

            }
            else{
                invalidresults = invalidresults + 1;
            }
        }

        System.out.println("Total number of goals scored was " + totgoals);
        // Displays the the total number of goals
        System.out.println("Valid number of games is " + validresults);
        System.out.println("Invalid number of games is " + invalidresults);

        System.out.println("EOF");
    }
}

Answer 1

//This is where we'll write the HTML to if the user's chooses so
private static final String OUTPUT_FILENAME = "output.html";

public static void main(String[] args) throws IOException
{
    final Scanner scanner = new Scanner(System.in);
    final String content = "Foobar";

    final boolean toHtml;
    String input;

    //Get the user's input
    do
    {
        System.out.print("Do you want messages "
                + "written to (P)lain text, or (H)TML? ");

        input = scanner.nextLine();
    } while (!(input.equalsIgnoreCase("p") 
            || input.equalsIgnoreCase("h")));

    toHtml = input.equalsIgnoreCase("h");

    if (toHtml)
    {
        //Redirect the standard output stream to the HTML file
        final FileOutputStream fileOut //False indicates we're not appending
                = new FileOutputStream(OUTPUT_FILENAME, false);
        final PrintStream outStream = new PrintStream(fileOut);

        System.setOut(outStream);
    }

    System.out.println(toHtml 
            ? String.format("<p>%s</p>", content) //Write HTML to file
            : content); //We're not writing to an HTML file: plain text
}

可以写出输出到HTML文件的内容吗？

1 个答案: