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       對應(yīng)用戶自己定義的非string類型的變量，jBPM是先將變量轉(zhuǎn)換成二進(jìn)制object 流，然后再轉(zhuǎn)換成string類型存儲(chǔ)在數(shù)據(jù)庫中，取變量的過程與之相反。由于轉(zhuǎn)換成string涉及到編碼格式問題，如GBK、ISO等，而編碼格式涉及到操作系統(tǒng)、數(shù)據(jù)庫、jvm等多方面的影響，jbpm目前還沒有解決這個(gè)問題，因此在使用非string類型變量的時(shí)候，jbpm會(huì)出錯(cuò)。這個(gè)問題tom（jbpm創(chuàng)始人）正在解決。
       這個(gè)問題，似乎將變量按二進(jìn)制存儲(chǔ)更好些，這樣就不會(huì)涉及編碼格式問題。
       另外一種方法是使用統(tǒng)一的編碼格式，改寫后的org.jbpm.delegation.serializerSerializableSerializer如下：
public class SerializableSerializer implements Serializer {

    public String serialize(Object object) {
        String serialized = null;

        if (object != null) {
            if (!(object instanceof Serializable)) {
                throw new IllegalArgumentException("object ‘" + object + "‘ (" +
                        object.getClass().getName() +
                        ") cannot be serialized with " +
                        this.getClass().getName());
            }

            try {
                ByteArrayOutputStream baos = new ByteArrayOutputStream();
                ObjectOutputStream oos = new ObjectOutputStream(baos);
                oos.writeObject(object);
                oos.flush();
                baos.flush();

                serialized = baos.toString(“ISO-8859-1“);//修改

            } catch (IOException e) {
                e.printStackTrace();
                throw new RuntimeException(
                        "couldn‘t serialize state definition");
            }
        }

        return serialized;
    }

    public Object deserialize(String text) {
        Object object = null;

        if (text != null) {
            try {
                ByteArrayInputStream bais = new ByteArrayInputStream(text.
                        getBytes(“ISO-8859-1“));  //修改
                ObjectInputStream ois = new ObjectInputStream(bais);
                object = ois.readObject();
            } catch (Exception e) {
                e.printStackTrace();
                throw new RuntimeException(
                        "couldn‘t deserialize object from inputstream");
            }
        }

        return object;
    }

}