Question

我通过netbeans IDE生成的Web服务客户端调用Web服务方法。

 private String getCitiesByCountry(java.lang.String countryName) {
        webService.GlobalWeatherSoap port = service.getGlobalWeatherSoap();
        return port.getCitiesByCountry(countryName);
    }

所以我在我的程序中调用这个方法，

String b = getWeather("Katunayake", "Sri Lanka");

它会给我一个包含xml数据的字符串输出。

String b = getWeather("Katunayake", "Sri Lanka"); = (java.lang.String) <?xml version="1.0" encoding="utf-16"?>
<CurrentWeather>
  <Location>Katunayake, Sri Lanka (VCBI) 07-10N 079-53E 8M</Location>
  <Time>Jun 22, 2015 - 06:10 AM EDT / 2015.06.22 1010 UTC</Time>
  <Wind> from the SW (220 degrees) at 10 MPH (9 KT):0</Wind>
  <Visibility> greater than 7 mile(s):0</Visibility>
  <SkyConditions> partly cloudy</SkyConditions>
  <Temperature> 86 F (30 C)</Temperature>
  <DewPoint> 77 F (25 C)</DewPoint>
  <RelativeHumidity> 74%</RelativeHumidity>
  <Pressure> 29.74 in. Hg (1007 hPa)</Pressure>
  <Status>Success</Status>
</CurrentWeather>

我如何获得<Location>,<SkyConditions>,<Temperature>的价值。

Answer 1

一种方法是使用DOM解析器，使用http://examples.javacodegeeks.com/core-java/xml/java-xml-parser-tutorial作为指南：

String b = getWeather("Katunayake", "Sri Lanka"); 
InputStream weatherAsStream = new ByteArrayInputStream(b.getBytes(StandardCharsets.UTF_8));

DocumentBuilderFactory fac = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = fac.newDocumentBuilder();
org.w3c.dom.Document weatherDoc = builder.parse(weatherAsStream);

String location = weatherDoc.getElementsByTagName("Location").item(0).getTextContent();
String skyConditions = weatherDoc.getElementsByTagName("SkyConditions").item(0).getTextContent();
String temperature = weatherDoc.getElementsByTagName("Temperature").item(0).getTextContent();

这没有异常处理，如果有多个具有相同名称的元素可能会中断，但您应该可以在这里工作。

Answer 2

如果您只需要这3个值，则可以转到XPath。否则，DOM将读取整个文档。编写XPath expressions直接获取节点以读取值非常容易。

DocumentBuilderFactory factory = DocumentBuilderFactory.newInstance();
DocumentBuilder builder = null;
try {
    builder = factory.newDocumentBuilder();
} catch (ParserConfigurationException e) {
    e.printStackTrace();  
}
String xml = ...; // <-- The XML SOAP response
Document xmlDocument = builder.parse(new ByteArrayInputStream(xml.getBytes()));
XPath xPath =  XPathFactory.newInstance().newXPath();
String location = xPath.compile("/CurrentWeather/Location").evaluate(xmlDocument);
String skyCond = xPath.compile("/CurrentWeather/SkyConditions").evaluate(xmlDocument);
String tmp = xPath.compile("/CurrentWeather/Temperature").evaluate(xmlDocument);

如果您需要经常获取许多XML节点，请转到DOM。

从java中的soap响应中获取值

2 个答案: