调用淘宝api接口时，抛异常了，哪位大神指点一下啊？

[kezj04551]

log4j:WARN No appenders could be found for logger (sdk.biz.err).
log4j:WARN Please initialize the log4j system properly.
Exception in thread "main" java.lang.IllegalArgumentException: expected value at column 1
<?xml version="1.0" encoding="UTF-8"?>
<wangwang_eservice_avgwaittime_get_response>
<waiting_time_list_on_days>
<waiting_times_on_day>
<waiting_date>2011-12-21 00:00:00</waiting_date>
<waiting_time_by_ids>
<waiting_time_by_id>
<service_staff_id>*************</service_staff_id>
<avg_waiting_times>5118</avg_waiting_times>
</waiting_time_by_id>
</waiting_time_by_ids>
</waiting_times_on_day>
</waiting_time_list_on_days>
</wangwang_eservice_avgwaittime_get_response>
^
at com.taobao.api.internal.util.json.ExceptionErrorListener.error(ExceptionErrorListener.java:7)
at com.taobao.api.internal.util.json.JSONValidator.error(JSONValidator.java:211)
at com.taobao.api.internal.util.json.JSONValidator.valid(JSONValidator.java:33)
at com.taobao.api.internal.util.json.JSONValidator.validate(JSONValidator.java:20)
at com.taobao.api.internal.util.json.JSONValidatingReader.read(JSONValidatingReader.java:20)
at com.taobao.api.internal.parser.json.JsonConverter.toResponse(JsonConverter.java:27)
at com.taobao.api.internal.parser.json.ObjectJsonParser.parse(ObjectJsonParser.java:24)
at com.taobao.api.DefaultTaobaoClient._execute(DefaultTaobaoClient.java:110)
at com.taobao.api.DefaultTaobaoClient.execute(DefaultTaobaoClient.java:81)
at dome1.main(dome1.java:35)

[其实我是真性情]

感觉好像是少包，你确定你将他们的包导入到你的工程了？

[其实我是真性情]

感觉好像是少包，你确定你将他们的包导入到你的工程了？