public static boolean WriteObject(Object object,String filename){
        System.gc();
        if(object instanceof Serializable){
            FileOutputStream fos;
            try {
                fos = new FileOutputStream(filename);
            } catch (FileNotFoundException e1) {
                System.err.println("Can not find file:"+filename+".");        
                return false;
            }
            ObjectOutputStream oos;
            try {
                oos = new ObjectOutputStream(fos);
                
                oos.writeObject(object);        
                oos.close();
            } catch (IOException e) {
                e.printStackTrace();
                System.err.println("Can not write object:"+filename+".");    
                return false;
            }
            return true;
        }
        else{
            System.err.println("Object "+ object.getClass()+" can not be save.");
            return false;
        }

    }

解决方法：调用ObjectOutputStream的reset方法，丢弃缓存中已发送过的对象

如下事例用到流控的思想：丢弃缓存中已发送的对象。。

将文件1写入到文件2...

        File csvFile = new File("文件1");
        File objFile = new File("文件2");
        int recInterval = 10000;
        
        try {
            Date start = new Date();
            System.out.println(start + ": started with interval " + recInterval);
            
            int count = 0;
            BufferedReader bufRdr = new BufferedReader(
                    new FileReader(csvFile));
            ObjectOutputStream oos = new ObjectOutputStream(
                    new FileOutputStream(objFile));
            String line;
            while( (line = bufRdr.readLine()) != null) {
                String [] cols = line.split(",");
                // oos.writeUnshared(cols);
                oos.writeObject(cols);
                ++count;
                if (count % recInterval == 0)
                    oos.reset();
            }
            bufRdr.close();
            oos.close();            
            
            Date finish = new Date();
            System.out.println(finish + ": finished for " + count + " records");
             System.out.println("Execution time (ms): " + (finish.getTime() - start.getTime()));
             System.out.println();
        }
        catch (Exception ex) {
            ex.printStackTrace();
        }

------解决方案--------------------
http://www.iteye.com/problems/21351

lz看看这里的方法 你试试看。。。