撰寫 web service client stub時的錯誤

若出現
java.lang.ClassCastException: com.sun.xml.internal.messaging.saaj.soap.ver1_1.Message1_1Impl cannot be cast to com.sun.xml.messaging.saaj.soap.MessageImpl
訊息,可能是因為JDK是1.6太新,
則需要下載最新版的SAAJ API,
https://saaj.dev.java.net/