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Android利用Soap读取WebService并且解析XML的DataSet数据

2014-06-19 10:33 239 查看
摘抄至:http://blog.csdn.net/comeonyangzi/article/details/25722275

一、Soap的结构



调用webService需要以下几个参数:命名空间、Soap Action、WSDL的URL、方法名。接下来以调用火车列车信息数据为例,webService地址为:webservice.webxml.com.cn/WebServices/TrainTimeWebService.asmx?op=getDetailInfoByTrainCode

二、调用WebService

一般来说,调用webService通常需要几个步骤,在调用之前,我们需要下载Soap的jar包,网上有很多,不再赘述。

1、参数设置:上面说到的几个参数都要先设置,这主要依赖于你要调用的web'Service的网址:

[java]
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// 命名空间

String nameSpace = "http://WebXml.com.cn/";

// 调用的方法名称

String methodName = "getDetailInfoByTrainCode";

// EndPoint

String endPoint = "http//webservice.webxml.com.cn/WebServices/TrainTimeWebService.asmx";

// SOAP Action

String soapAction = "http//WebXml.com.cn/getDetailInfoByTrainCode";

// 命名空间
String nameSpace = "http://WebXml.com.cn/";
// 调用的方法名称
String methodName = "getDetailInfoByTrainCode";
// EndPoint
String endPoint = "http//webservice.webxml.com.cn/WebServices/TrainTimeWebService.asmx";
// SOAP Action
String soapAction = "http//WebXml.com.cn/getDetailInfoByTrainCode";


2、指定命名空间与调用方法名

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// 指定WebService的命名空间和调用的方法名

SoapObject rpc = new SoapObject(nameSpace, methodName);

// 指定WebService的命名空间和调用的方法名
SoapObject rpc = new SoapObject(nameSpace, methodName);


3、设置参数:

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// 设置需调用WebService接口需要传入的两个参数TrainCode、userId

rpc.addProperty("TrainCode", params[0]);

rpc.addProperty("UserID","");

// 设置需调用WebService接口需要传入的两个参数TrainCode、userId
rpc.addProperty("TrainCode", params[0]);
rpc.addProperty("UserID","");


4、生成调用WebService方法的SOAP请求信息

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// 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本

SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);

envelope.bodyOut = rpc;

// 生成调用WebService方法的SOAP请求信息,并指定SOAP的版本
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER12);
envelope.bodyOut = rpc;


5、是否允许调用.Net的WebService

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// 设置是否调用的是dotNet开发的WebService

envelope.dotNet = true;

// 等价于envelope.bodyOut = rpc;

envelope.setOutputSoapObject(rpc);

// 设置是否调用的是dotNet开发的WebService
envelope.dotNet = true;
// 等价于envelope.bodyOut = rpc;
envelope.setOutputSoapObject(rpc);


6、创建Http对象

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HttpTransportSE transport = new HttpTransportSE(endPoint);

HttpTransportSE transport = new HttpTransportSE(endPoint);


7、调用WebService方法

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try {

// 调用WebService

transport.call(soapAction, envelope);
} catch (Exception e) {

e.printStackTrace();
}

try {
// 调用WebService
transport.call(soapAction, envelope);
} catch (Exception e) {
e.printStackTrace();
}


8、返回SoapObject对象

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SoapObject object=null;

// 获取返回的数据

if(envelope.bodyIn
instanceof SoapFault){

String str=((SoapFault)envelope.bodyIn).faultstring;
System.out.println("2"+str);

}
else{

object = (SoapObject) envelope.bodyIn;

}

SoapObject object=null;
// 获取返回的数据
if(envelope.bodyIn instanceof SoapFault){
String str=((SoapFault)envelope.bodyIn).faultstring;
System.out.println("2"+str);

}
else{
object = (SoapObject) envelope.bodyIn;
}


三、解析WebService中的DataSet数据

由于列车时刻表是DataSet数据,所以我们必须对返回的结果进行解析,在网上查找方法后,自己琢磨终于成功解析,方法如下:

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SoapObject soap1=(SoapObject)object.getProperty("getDetailInfoByTrainCodeResult");

SoapObject childs=(SoapObject)soap1.getProperty(1);

SoapObject soap2=(SoapObject)childs.getProperty(0);

///

for(int i=0;i<soap2.getPropertyCount();i++){

SoapObject soap3=(SoapObject)soap2.getProperty(i);
///

Info info=new Info();

info.setStation(soap3.getProperty(0).toString());

info.setArriveTime(soap3.getProperty(1).toString());

info.setStartTime(soap3.getProperty(2).toString());

info.setKm(soap3.getProperty(3).toString());

Raininfo.add(info);
//result=soap3.getProperty(3).toString();

}

SoapObject soap1=(SoapObject)object.getProperty("getDetailInfoByTrainCodeResult");
SoapObject childs=(SoapObject)soap1.getProperty(1);
SoapObject soap2=(SoapObject)childs.getProperty(0);
///
for(int i=0;i<soap2.getPropertyCount();i++){
SoapObject soap3=(SoapObject)soap2.getProperty(i);
///
Info info=new Info();
info.setStation(soap3.getProperty(0).toString());
info.setArriveTime(soap3.getProperty(1).toString());
info.setStartTime(soap3.getProperty(2).toString());
info.setKm(soap3.getProperty(3).toString());
Raininfo.add(info);
//result=soap3.getProperty(3).toString();
}


我自己定义了一个Info的model类,用来存放我读取的火车时刻数据,这么多getProperty方法,有可能会看着头晕,接下来接一下xml的截图说明,相信大家一看就会:



PS:如果数据不是DataSet的话,不用这么麻烦,直接就可以利用正则表达式进行解析。
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