java - 尝试从在某些标签之间读取的缓冲读取器中提取子字符串

Question

我正在使用 bufferedreader 提取 5 个网页，每个网页之间用空格分隔，我想使用子字符串来提取每个页面的 url、html、源代码和日期。但我需要有关如何正确使用子字符串来实现此目的的指导，干杯。

public static List<WebPage> readRawTextFile(Context ctx, int resId) {   

    InputStream inputStream = ctx.getResources().openRawResource(
            R.raw.pages);

    InputStreamReader inputreader = new InputStreamReader(inputStream);
    BufferedReader buffreader = new BufferedReader(inputreader);
    String line;
    StringBuilder text = new StringBuilder();

    try {
        while ((line = buffreader.readLine()) != null) {


            if (line.length() == 0) {       
                // ignore for now 
                                //Will be used when blank line is encountered
            }

            if (line.length() != 0)  {
         //here I want the substring to pull out the correctStrings
                int sURL = line.indexOf("<!--");
                    int eURL = line.indexOf("-->");
                line.substring(sURL,eURL);
                **//Problem is here**
            }
        }
    } catch (IOException e) {
        return null;

    }
    return null;
}

Answer 1

我想你想要的是这样的，

public class Test {
   public static void main(String args[]) {
    String text = "<!--Address:google.co.uk.html-->";
    String converted1 = text.replaceAll("\\<!--", "");
    String converted2 = converted1.replaceAll("\\-->", "");
    System.out.println(converted2);
   }

}

结果显示:地址:google.co.uk.html