Question

我有一个返回给我的xml有效负载

<response><row><row _id="1" _uuid="CD07C40E-4943-44B0-BF5E-370DA2133E25" _position="1"   
 _address="http://data.seattle.gov/resource/fire-911/1"><type> --T::00</type></row><row _id="111"  
 _uuid="2423EC44-56D5-494C-941F-6F3B5DF49AC5" _position="111"  
 _address="http://data.seattle.gov/resource/fire-911/111"><address>10049 College Way N</address> 
 <type>Aid Response</type><latitude>47.701756</latitude><longitude>-122.335022</longitude>
 <report_location latitude="47.701756" longitude="-122.335022"/>
 <incident_number>F110104009</incident_number></row>

我想用xpath捕获“行”节点：#[xpath://response/row/row]。这会返回一串逗号[, , , , , , , ,]而不是

<row _id="111" _uuid="2423EC44-56D5-494C-941F-6F3B5DF49AC5" _position="111" _address="http://data.seattle.gov/resource/fire-911/111">
    <address>10049 College Way N</address> 
    <type>Aid Response</type>
    <latitude>47.701756</latitude>
    <longitude>-122.335022</longitude>
    <report_location latitude="47.701756" longitude="-122.335022"/>
    <incident_number>F110104009</incident_number>
</row>

如果我通过在线测试程序插入此xpath，则可以：//response/row/row

<row _id="112" _uuid="DDAE5717-4A07-4E71-9CAE-D1F1CBAA94FD" _position="112"  _address="http://data.seattle.gov/resource/fire-911/112">
    <address>5929 Beach Dr Sw</address>  
    <type>Aid Response</type>
    <latitude>47.550431</latitude>
    <longitude>-122.397816</longitude> 
    <report_location latitude="47.550431" longitude="-122.397816"/>
    <incident_number>F110104008</incident_number>
</row>

我需要做些什么让它在骡子中工作？

我的configuration.xml：

    <flow name="seattleemergencyFlow1" doc:name="seattleemergencyFlow1">
    <http:inbound-endpoint exchange-pattern="request-response" host="localhost" port="8900"   
    path="get-emergency" doc:name="HTTP"/>
    <http:outbound-endpoint exchange-pattern="request-response" host="data.seattle.gov" port="80" 
     path="resource/kzjm-xkqj.xml?" method="GET" contentType="application/json" doc:name="HTTP"/>
    <object-to-string-transformer doc:name="Object to String"/>
    <logger message="#[xpath://response/row/row]" level="ERROR" doc:name="Logger"/>

谢谢！

Answer 1

由于您使用的是Mule＆gt; = 3.3.x，因此您应该使用MEL而不是旧的xpath:表达式求值程序。

使用MEL：

如果您想获得java.util.List org.dom4j.Element，请使用：
```
#[xpath('//response/row/row')]
```
如果您只想要第一个org.dom4j.Element，请使用：
```
#[xpath('//response/row/row')[0]]
```
如果您想获得此元素的java.lang.String表示，请使用：
```
#[xpath('//response/row/row')[0].asXML()]
```

骡子中的xpath表达式问题

1 个答案: