webservice的 发布一般都是使用WSDL(web service descriptive language)文件的样式来发布的,在WSDL文件里面,包含这个webservice暴露在外面可供使用的接口。今天搜索到了非常好的 webservice provider列表
http://www.webservicex.net/WCF/default.aspx
这上面列出了70多个包括很多方面的free webservice provider,utilities->global weather就可以获取全球的天气预报。
下面我们来看Java如何通过WSDL文件来调用这些web service:
注意,以下的代码并没有经过真正的测试,只是说明这些情况,不同版本的Axis相差很大,大家最好以apache网站上的例子为准,这里仅仅用于说明其基本用法。?
1,直接AXIS调用远程的web service
我觉得这种方法比较适合那些高手,他们能直接看懂XML格式的WSDL文件,我自己是看不懂的,尤其我不是专门搞这行的,即使一段时间看懂,后来也就忘记了。直接调用模式如下:
import java.util.Date;
import java.text.DateFormat;
import org.apache.axis.client.Call;
import org.apache.axis.client.Service;
import javax.xml.namespace.QName;
import java.lang.Integer;
import javax.xml.rpc.ParameterMode;
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public class caClient {
????????????
?????? public static void main(String[] args) {
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????????????? try {
???????????????????? String endpoint = "http://localhost:8080/ca3/services/caSynrochnized?wsdl";
??? ?? ??? ?? ?? ??? //直接引用远程的wsdl文件
??? ?? ??? ?? ?? ?? //以下都是套路
???????????????????? Service service = new Service();
???????????????????? Call call = (Call) service.createCall();
???????????????????? call.setTargetEndpointAddress(endpoint);
???????????????????? call.setOperationName("addUser");//WSDL里面描述的接口名称
???????????????????? call.addParameter("userName", org.apache.axis.encoding.XMLType.XSD_DATE,
?????????????????????????????????? javax.xml.rpc.ParameterMode.IN);//接口的参数
???????????????????? call.setReturnType(org.apache.axis.encoding.XMLType.XSD_STRING);//设置返回类型?
??? ??? ??? ??? ???? String temp = "测试人员";
???????????????????? String result = (String)call.invoke(new Object[]{temp});
??? ??? ??? ??? ???? //给方法传递参数,并且调用方法
???????????????????? System.out.println("result is "+result);
????????????? }
????????????? catch (Exception e) {
???????????????????? System.err.println(e.toString());
????????????? }
?????? }
}
2,直接SOAP调用远程的webservice
这种模式我从来没有见过,也没有试过,但是网络上有人贴出来,我也转过来?
import org.apache.soap.util.xml.*;
import org.apache.soap.*;
import org.apache.soap.rpc.*;
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import java.io.*;
import java.net.*;
import java.util.Vector;
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public class caService{
?????? public static String getService(String user) {
?????? URL url = null;
?????? try {
?????????? url=new URL("http://192.168.0.100:8080/ca3/services/caSynrochnized");
?????? } catch (MalformedURLException mue) {
????????? return mue.getMessage();
????? ?? }
???????????? // This is the main SOAP object
?????? Call soapCall = new Call();
?????? // Use SOAP encoding
?????? soapCall.setEncodingStyleURI(Constants.NS_URI_SOAP_ENC);
?????? // This is the remote object we're asking for the price
?????? soapCall.setTargetObjectURI("urn:xmethods-caSynrochnized");
?????? // This is the name of the method on the above object
?????? soapCall.setMethodName("getUser");
?????? // We need to send the ISBN number as an input parameter to the method
?????? Vector soapParams = new Vector();
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?????? // name, type, value, encoding style
?????? Parameter isbnParam = new Parameter("userName", String.class, user, null);
?????? soapParams.addElement(isbnParam);
?????? soapCall.setParams(soapParams);
?????? try {
????????? // Invoke the remote method on the object
????????? Response soapResponse = soapCall.invoke(url,"");
????????? // Check to see if there is an error, return "N/A"
????????? if (soapResponse.generatedFault()) {
????????????? Fault fault = soapResponse.getFault();
???????????? String f = fault.getFaultString();
???????????? return f;
????????? } else {
???????????? // read result
???? ????????Parameter soapResult = soapResponse.getReturnValue ();
???????????? // get a string from the result
???????????? return soapResult.getValue().toString();
????????? }
?????? } catch (SOAPException se) {
????????? return se.getMessage();
?????? }
?? ?}
}
3,使用wsdl2java把WSDL文件转成本地类,然后像本地类一样使用,即可。
这是像我这种懒人最喜欢的方式,仍然以前面的global weather report为例。
首先?? java org.apache.axis.wsdl.WSDL2Java http://www.webservicex.net/globalweather.asmx.WSDL
原本的网址是http://www.webservicex.net/globalweather.asmx?WSDL,中间个各问号,但是Linux下面它不能解析,所以去掉问号,改为点号。
那么就会出现4个文件:
GlobalWeather.java? GlobalWeatherLocator.java? GlobalWeatherSoap.java? GlobalWeatherSoapStub.java
其中GlobalWeatherSoap.java是我们最为关心的接口文件,如果你对RMI等SOAP实现的具体细节不感兴趣,那么你只需要看接口文件即可,在使用的时候,引入这个接口即可,就好像使用本地类一样。
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ip查询接口 http://webservice.36wu.com/ipService.asmx
天气预报接口 http://webservice.36wu.com/weatherService.asmx
身份证查询接口 http://webservice.36wu.com/IdCardService.asmx
手机归属地接口 http://webservice.36wu.com/MobilePhoneService.asmx
翻译接口 http://webservice.36wu.com/TranslationService.asmx
火车时刻接口:http://webservice.36wu.com/TrainService.asmx
股票查询接口:http://webservice.36wu.com/StockService.asmx
邮编接口:http://webservice.36wu.com/ZipcodeService.asmx
二维码Web服务
http://webservice.36wu.com/DimensionalCodeService.asmx
公交查询Web服务
http://webservice.36wu.com/mapService.asmx?
ISBN查询Web服务
http://webservice.36wu.com/ISBNService.asmx
ICP备案查询Web服务? http://webservice.36wu.com/ICPServic.asmx