support get task name

src/main/java/cn/montaro/aria2/bean/Task.java

@@ -1,6 +1,7 @@
 package cn.montaro.aria2.bean;
 
 import java.io.Serializable;
+import java.util.List;
 import java.util.Objects;
 
 public class Task implements Serializable {
@@ -17,6 +18,35 @@ public class Task implements Serializable {
 
     private String status;
 
+    private String dir;
+
+    private List<TaskFile> files;
+
+    static class TaskFile {
+
+        String path;
+
+        public String getPath() {
+            return path;
+        }
+
+        public void setPath(String path) {
+            this.path = path;
+        }
+    }
+
+    public String getName() {
+        if (Objects.isNull(dir) || this.files.isEmpty()) {
+            return "";
+        }
+        String name = files.get(0).path.replace(dir + "/", "");
+        String substring = name.substring(0, 23);
+        if (name.length() > 25) {
+            substring = substring + "...";
+        }
+        return substring;
+    }
+
     public int getProgress() {
         if (Objects.isNull(completedLength)
                 || completedLength == 0