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WebCrowler用のJavaファイルが1つあります。これにより、行といくつかの行番号に複数のマーカーがあるようなエラーが発生します。

私はちょうどパターンとマッチャーを学びました。だから私はエラーを修正することができません。

私のコードは

 import java.awt.*;
 import java.awt.event.*;
 import java.io.BufferedReader;
 import java.awt.*;
 import java.io.IOException;
 import java.io.InputStreamReader;
 import java.net.URL;
 import java.util.regex.Matcher;
 import java.util.regex.Pattern;
 import java.util.regex.PatternSyntaxException;


 class initComponents extends Frame implements ActionListener {

      // TextField addt  ,factorialt,concatt1,concatt2,lengtht,palindromet,comparet1,comparet2,substringt1,substringt2;
    //Button add1,factorial1,concat1,length1,palindrome1,compare1,substring1;
 String s1="";
//String s3="";
//String s4="";
//String s2="";
 Button Search,Clear;
 TextField text1;
 TextArea text2;
Label lab,lab1,lab2;

public initComponents()
{
        MyWindowAdapter1 m=new MyWindowAdapter1(this);
        addWindowListener(m);

        setTitle("Web Crawler");
        setLayout(null);
        setSize(1000,1000);
        setVisible(true);

        setBackground(Color.LIGHT_GRAY);

        lab=new Label("Name: ");
        text1=new TextField(20);
        //text2=new TextArea(80,80);
        text2=new TextArea();

       //lab1=new Label("Count");
       //lab2=new Label(); 

        Search=new Button("Search");
        Clear=new Button("Clear");

        lab.setBounds(50,50,80,20);
        //lab1.setBounds(500,50,80,20);
        //lab2.setBounds(590,50,250,20);

        text1.setBounds(140,50,250,20);
        Search.setBounds(50,100,80,20);
        Clear.setBounds(150,100,80,20); 
        text2.setBounds(50, 200, 700, 500);
        //text2.setBounds(200,100,80,20);

        add(lab);
        add(text1);
        //add(lab1);
        //add(lab2);
        add(Search);
        add(Clear);
        add(text2);


        setVisible(true);
        setSize(800,800);

        Search.addActionListener(this);
        Clear.addActionListener(this);



}


 public void actionPerformed(ActionEvent a) 
  {
// TODO Auto-generated method stub



if(a.getSource().equals(Clear))
{
    text1.setText("");
    text2.setText("");
    //text2.append("");
}

    if(a.getSource().equals(Search))
    {
        s1=text1.getText();

        text2.setText("");
        //text2.append();
        //web_crawler c=new web_crawler();

        //c.crawling(s1);


        try{
             InputStreamReader in = new InputStreamReader(new URL(s1).openStream());
             StringBuilder input = new StringBuilder();

             int ch;

             while ((ch = in.read()) != -1) 
                 input.append((char) ch);

             String patternString = "<a\\s+href\\s*=\\s*(\"[^\"]*\"|[^\\s>])\\s*>";


             String abc=((?<html>(href|src)\s*=\s*")|(?<css>url\())(?<url>.*?)(?(html)"|\));  **// here is error**
             Pattern pattern = Pattern.compile(abc, Pattern.CASE_INSENSITIVE);
             Matcher matcher = pattern.matcher(input);
             int count=0;
             String abc="";

             System.out.println(pattern);
             System.out.println(matcher.toString());

             while (matcher.find()) 
             {

                 int start = matcher.start();
                 int end = matcher.end();
                 String match = input.substring(start, end);

                 //match.matches();
             //jTextArea1.append(match);
             //jTextArea1.append("\n");

                 //String[] tokens=match.split(" ");


                 //System.out.println(tokens[0].toString());



                 text2.append(match);
                 text2.append("\n");
             }




            }
            catch (IOException e) 
            {
             e.printStackTrace();
            }
            catch (PatternSyntaxException e)
            {
             e.printStackTrace(); 
            }



    }

}

}

    class MyWindowAdapter1 extends WindowAdapter{
initComponents mf;
public MyWindowAdapter1(initComponents mf){
this.mf=mf;
}

public void windowClosing(WindowEvent we)
  {
      System.exit(0);
 } 
 }

次のようなエラーが発生します

     Exception in thread "AWT-EventQueue-0" java.lang.Error: Unresolved compilation problems: 
Syntax error on token "?", new expected
Syntax error on token ">", Type expected after this token
Syntax error on token "Invalid Character", invalid AssignmentOperator
Syntax error on token "Invalid Character", delete this token
Syntax error on tokens, Expression expected instead

at initComponents.actionPerformed(initComponents.java:115)
at java.awt.Button.processActionEvent(Unknown Source)
at java.awt.Button.processEvent(Unknown Source)
at java.awt.Component.dispatchEventImpl(Unknown Source)
at java.awt.Component.dispatchEvent(Unknown Source)
at java.awt.EventQueue.dispatchEventImpl(Unknown Source)
at java.awt.EventQueue.access$000(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.awt.EventQueue$3.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.awt.EventQueue$4.run(Unknown Source)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$1.doIntersectionPrivilege(Unknown Source)
at java.awt.EventQueue.dispatchEvent(Unknown Source)
at java.awt.EventDispatchThread.pumpOneEventForFilters(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForFilter(Unknown Source)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.pumpEvents(Unknown Source)
at java.awt.EventDispatchThread.run(Unknown Source)

私を助けてください。ありがとう

4

2 に答える 2

3

リテラルを引用符で囲み、正しいエスケープシーケンスを追加する必要があります。また、Stringabcを2回宣言します。

String abc=((?<html>(href|src)\s*=\s*")|(?<css>url\())(?<url>.*?)(?(html)"|\));  **// here is error**
Pattern pattern = Pattern.compile(abc, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(input);
int count=0;
String abc=""; **redeclaration here**

次のように変更します。

String abc="((?<html>(href|src)\\s*=\\s*\")|(?<css>url\\())(?<url>.*?)(?(html)\"|\\))";
Pattern pattern = Pattern.compile(abc, Pattern.CASE_INSENSITIVE);
Matcher matcher = pattern.matcher(input);
int count=0;
abc="";
于 2012-04-22T17:27:56.053 に答える
0 
String abc="((?<html>(href|src)\\s*=\\s*\")|(?<css>url\\())(?<url>.*?)(?(html)\"|\\))";
// **here should be no more error**

問題は、引用符を忘れたため、文字列の円記号と引用符をエスケープする必要があることです。

于 2012-04-22T17:21:20.933 に答える