ЛР3. Задание 4

src/tse/LR_3.java

@@ -1,6 +1,7 @@
 package tse;
 
 import tse.lr3.DirCopy;
+import tse.lr3.DirFindText;
 import tse.lr3.LR_3_Tasks;
 
 /**
@@ -29,6 +30,7 @@ public class LR_3 implements ILabRab {
                 DirCopy.main();
                 break;
             case 3:
+                DirFindText.main();
                 break;
             case 4:
                 break;

src/tse/lr3/DirFindText.java

@@ -0,0 +1,127 @@
+package tse.lr3;
+
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.FileOutputStream;
+import java.io.IOException;
+import java.io.InputStreamReader;
+import java.io.OutputStreamWriter;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ *
+ * @author aNNiMON
+ */
+public class DirFindText extends AbstractDirectoryChooser {
+    
+    private static final String SEARCH_TEXT = "class";
+    
+    public static void main() {
+        new DirFindText().setVisible(true);
+    }
+    
+    private final List<FindInfo> findInfos;
+    private File logFile;
+    private BufferedWriter writer;
+
+    public DirFindText() {
+        super("Поиск текста в директориях");
+        findInfos = new ArrayList<>();
+        createFilesAndDirs();
+    }
+
+    private void createFilesAndDirs() {
+        logFile = new File("E:\\LR_3\\task4_log.txt");
+        try {
+            writer = new BufferedWriter(
+                    new OutputStreamWriter(new FileOutputStream(logFile, true), "UTF-8")
+            );
+        } catch (IOException ex) {
+            ex.printStackTrace();
+        }
+    }
+
+    @Override
+    protected void directorySelected(File directory) {
+        scanFiles(directory);
+        writeFindInfo(findInfos);
+        if (writer != null) {
+            try {
+                writer.flush();
+                writer.close();
+            } catch (IOException ex) {}
+        }
+    }
+    
+    private void scanFiles(File dir) {
+        File[] files = dir.listFiles();
+        for (File file : files) {
+            if (file.isDirectory()) {
+                scanFiles(file);
+            } else {
+                // Ищем строку в файле
+                try {
+                    findString(file, SEARCH_TEXT);
+                } catch (IOException ex) {}
+            }
+        }
+    }
+    
+    private void findString(File file, String searchText) throws IOException {
+        BufferedReader reader = new BufferedReader(
+                new InputStreamReader( new FileInputStream(file), "UTF-8" )
+        );
+        int lineNumber = 0;
+        String line;
+        while ( (line = reader.readLine()) != null ) {
+            int pos = -1;
+            while( (pos = line.indexOf(searchText, pos + 1)) != -1) {
+                findInfos.add(new FindInfo(file.getAbsolutePath(), lineNumber, pos));
+            }
+            lineNumber++;
+        }
+        reader.close();
+        reader = null;
+    }
+    
+    private void writeFindInfo(List<FindInfo> infos) {
+        writeLog("------------------");
+        writeLog("Искали: " + SEARCH_TEXT);
+        Collections.sort(infos, filenameComparator);
+        for (FindInfo info : infos) {
+            writeLog(String.format("[%d:%d]\tfile://%s", info.linenumber + 1, info.position + 1, info.filename));
+        }
+    }
+    
+    private void writeLog(String filename) {
+        System.out.println(filename);
+        try {
+            writer.write(filename);
+            writer.newLine();
+        } catch (IOException ex) { }
+    }
+
+    private class FindInfo {
+        String filename;
+        int linenumber, position;
+
+        public FindInfo(String filename, int linenumber, int position) {
+            this.filename = filename;
+            this.linenumber = linenumber;
+            this.position = position;
+        }
+    }
+    
+    private final Comparator<FindInfo> filenameComparator = new Comparator<FindInfo>() {
+
+        @Override
+        public int compare(FindInfo o1, FindInfo o2) {
+            return o1.filename.compareToIgnoreCase(o2.filename);
+        }
+    };
+}