feat: show metadata info

src/main.java

@@ -0,0 +1,60 @@
+import mobimeta.*;
+
+import java.io.File;
+import java.util.List;
+
+class Main {
+    static String splitLine = "================================================================";
+
+    public static void showMeta(File file) {
+        System.out.println(splitLine);
+        System.out.println("File name: " + file.getName());
+        MobiMeta meta;
+        try {
+            meta = new MobiMeta(file);
+        } catch (MobiMetaException err) {
+            System.err.println("Error: " + err.getMessage());
+            return;
+        }
+        String encoding = meta.getCharacterEncoding();
+        List<EXTHRecord> exthList = meta.getEXTHRecords();
+        System.out.println("Book name: " + meta.getFullName());
+        System.out.println("Encoding: " + encoding);
+        System.out.println("Locale: " + meta.getLocale());
+        System.out.println(splitLine);
+        System.out.print(meta.getMetaInfo());
+
+        System.out.print(splitLine);
+        for (EXTHRecord rec : exthList) {
+            if (!rec.isKnownType()) {
+                continue;  // skip unknown EXTH record
+            }
+            System.out.println();
+            int type = rec.getRecordType();
+            String desc = rec.getTypeDescription();
+            String content = StreamUtils.byteArrayToString(rec.getData(), encoding);
+            System.out.println("[" + type + "](" + desc + "): " + content);
+        }
+
+        System.out.println(splitLine);
+        for (EXTHRecord rec : exthList) {
+            if (rec.isKnownType()) {
+                continue;  // only show unknown type
+            }
+            int type = rec.getRecordType();
+            String content = StreamUtils.byteArrayToString(rec.getData(), encoding);
+            System.out.println("[" + type + "]: " + content);
+        }
+        System.out.println(splitLine);
+    }
+
+    public static void main(String[] args) {
+
+        String testFile = "XXRS.azw3";
+
+        File target = new File(testFile);
+
+        showMeta(target);
+
+    }
+}