Question

因此，我试图制作一个程序，您输入一个Flash游戏URL，然后下载.swf文件。如图所示：

import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLConnection;


/**
 * Main.java
 *
 * 
 */
public class Main {

    /**
     * Reads a web page into a StringBuilder object
     * and prints it out to console along with the
     * size of the page.
     */
    public void getWebSite() {

        try {

            URL url = new URL("http://www.vivalagames.com");
            URLConnection urlc = url.openConnection();

            BufferedInputStream buffer = new BufferedInputStream(urlc.getInputStream());

            StringBuilder builder = new StringBuilder();
            int byteRead;
            while ((byteRead = buffer.read()) != -1)
                builder.append((char) byteRead);

            buffer.close();

            Logger.log(builder.toString());
            System.out.println("The size of the web page is " + builder.length() + " bytes.");

        } catch (MalformedURLException ex) {
            ex.printStackTrace();
        } catch (IOException ex) {
            ex.printStackTrace();
        }
    }

    /**
     * Starts the program
     *
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        new Main().getWebSite();
    }
}

我已经到了下载网站html的部分并将其放入名为output.txt的文件中。现在我想做的是让它搜索文本文件，直到它找到单词“.swf”，搜索器代码是：

import java.io.*;
import java.util.Scanner;
import java.util.regex.MatchResult;

public class Sercher {
    public static void main() throws FileNotFoundException {
        Scanner s = new Scanner(new File("output.txt"));
        while (null != s.findWithinHorizon("(?i)\\b.swf\\b", 0)) {
            MatchResult mr = s.match();
            System.out.printf("Word found: %s at index %d to %d.%n", mr.group(),
                    mr.start(), mr.end());
        }


    }
}

现在如何让main.java代码运行Searcher.java中的函数？

Answer 1

这应该这样做：

public static void main(String[] args) {
    new Main().getWebSite();
    Searcher.main();
}

Answer 2

在Searcher类中创建Main类的实例。

public static void main(String[] args) {
   new Main().getWebSite();
   Searcher search = new Searcher();
}

或简单地说，使用Searcher.main();。

Answer 3

首先，将下载的HTML存储在文件中以便立即重新读取此文件并不是一个好主意。你可以在记忆中做所有事情。

考虑对象和方法。你基本上有两个对象：下载器和搜索器。并且您不希望程序有两种主要方法：只有一种方法。这个主要方法应如下所示：

// create the object which downloads the HTML
Downloader downloader = new Downloader();

// Ask it to download, and store the result into a String variable
String downloadedHtml = downloader.download();

// create the object which can search into a String for .swf references
Searcher searcher = new Searcher();

// pass it the String to search into
searcher.searchSwfIn(downloadedHtml);

Answer 4

您需要将类放入包中并将Searcher包导入主类。例如：

package foo.bar.package;    
import for.bar.package2.Searcher;
/* 
  Other import declarations
*/    
public class Main {    
/*
  Your code
*/     
    public static void main(String[] args) {
        new Main().getWebSite();
        new Searcher().search();    
    }    
}

package for.bar.package2;
/* 
  Import declarations
*/    
public class Searcher {
   public void search() throws FileNotFoundException {
        Scanner s = new Scanner(new File("output.txt"));
        while (null != s.findWithinHorizon("(?i)\\bjava\\b", 0)) {
            MatchResult mr = s.match();       

        System.out.printf("Word found: %s at index %d to %d.%n", mr.group(),
                mr.start(), mr.end());
    }

}

}

如何从另一个.java文件运行函数

4 个答案: