Java在文件中寫入/讀取不可序列化的對象

我正在使用JSI（Java Spatial Index，RTree）來實現2D空間搜索。我想將樹保存到文件中，這會使用下面的代碼觸發java.io.NotSerializableException。Java在文件中寫入/讀取不可序列化的對象

public class GeographicIndexer { 
    private static final Logger log = LoggerFactory.getLogger(GeographicIndexer.class); 
    public SpatialIndex spatialIndex = null; 

    public void init() { 
     this.spatialIndex = new RTree(); 
     this.spatialIndex.init(null); 
    } 

    public void add(float x1, float y1, float x2, float y2, int id) { 
     Rectangle rect = new Rectangle(x1, y1, x2, y2); 
     this.spatialIndex.add(rect, id); 
    } 

    public void add(float x, float y, int id) { 
     this.add(x, y, x, y, id); 
    } 

    public void saveIndex(String indexStorePath) { 
     try { 
      OutputStream file = new FileOutputStream(indexStorePath); 
      OutputStream buffer = new BufferedOutputStream(file); 
      ObjectOutput output = new ObjectOutputStream(buffer);  
      try { 
       output.writeObject(this.spatialIndex); 
      } finally { 
       output.close(); 
      } 
     } catch(IOException e) { 
      log.error("Fail to write geographic index"); 
      e.printStackTrace(); 
     } 
    } 

    public GeographicIndexer loadIndex(String indexStorePath) { 
     try { 
      InputStream file = new FileInputStream(indexStorePath); 
      InputStream buffer = new BufferedInputStream(file); 
      ObjectInput input = new ObjectInputStream(buffer); 

      try { 
       this.spatialIndex = (SpatialIndex)input.readObject(); 
      } catch (ClassNotFoundException e) { 
       log.error("Fail to read geographic index"); 
      } finally { 
       input.close(); 
      } 

      return this; 
     } catch(IOException e) { 
      log.error("Fail to read geographic index"); 
      return this; 
     } 
    } 
}

如何序列化此第三方類，以便我可以讀/寫它？謝謝。

來源

2013-04-15 Nathaniel Ding

可能該類沒有實現'Serializable'！ – NINCOMPOOP

你能在'output.writeObject（this.spatialIndex）;'後面捕獲異常並打印完整的跟蹤嗎？看起來像'try'後面是'finally' – sanbhat

@noob它沒有。這是否意味着我無法將其保存到文件？ –