Java - 使用DefaultHttpClient使用Web服务

时间:2013-04-15 21:23:35

标签: java web-services http java-ee soap

好的,我最近问了一个关于使用Java来使用Web服务的问题,而我遇到了多个编译错误。

我在过去的7个小时里一直试图让这个工作起来,在线进行研究。但是Java Web服务调用有很多不同的风格,这对于像我这样的新手来说几乎不可能为我的场景找到相关信息。

我现在有以下代码,至少编译时没有错误。

进口

import java.util.List;
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;

import org.apache.http.HttpResponse;
import org.apache.http.HttpStatus;
import org.apache.http.NameValuePair;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;

代码

    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost("http://vogellac2dm.appspot.com/register");

    try {
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
        nameValuePairs.add(new BasicNameValuePair("registrationid", "123456789"));
        post.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        HttpResponse response = client.execute(post);
        BufferedReader rd = new BufferedReader(new InputStreamReader(response.getEntity().getContent()));
        String line = "";
        while ((line = rd.readLine()) != null) {
            System.out.println(line);
        }

    } catch (IOException e) {
        e.printStackTrace();
    }

现在,我有一个.NET WSDL的URL http://webservices.vm.vmc/ExampleService.asmx?WSDL

我想调用接受5个String参数的方法“AddEmployee”。

所以逻辑上我会:

  1. 将我的HttpPost值更改为WSDL URL。
  2. 输入方法名称“AddEmployee”。 (不确定如何/在哪里?)
  3. 我假设nameValuePairs.add将每个参数使用一次(名称,值)
  4. 提前感谢您的帮助。



    修改

    在没有透露任何详细信息的情况下,我创建了一个我想要调用的示例。这是一个简单服务的WSDL,它有1个方法,接受3个字符串参数,并返回一个字符串。

    <wsdl:definitions xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:tm="http://microsoft.com/wsdl/mime/textMatching/" xmlns:soapenc="http://schemas.xmlsoap.org/soap/encoding/" xmlns:mime="http://schemas.xmlsoap.org/wsdl/mime/" xmlns:tns="https://webservices.vm.vmc/ClientSmart" xmlns:s="http://www.w3.org/2001/XMLSchema" xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" targetNamespace="https://webservices.vm.vmc/ClientSmart">
      <wsdl:types>
        <s:schema elementFormDefault="qualified" targetNamespace="https://webservices.vm.vmc/ClientSmart">
          <s:element name="AddEmployee">
            <s:complexType>
              <s:sequence>
                <s:element minOccurs="0" maxOccurs="1" name="string1" type="s:string"/>
                <s:element minOccurs="0" maxOccurs="1" name="string2" type="s:string"/>
                <s:element minOccurs="0" maxOccurs="1" name="string3" type="s:string"/>
              </s:sequence>
            </s:complexType>
          </s:element>
          <s:element name="AddEmployeeResponse">
            <s:complexType>
              <s:sequence>
                <s:element minOccurs="0" maxOccurs="1" name="AddEmployeeResult" type="s:string"/>
              </s:sequence>
            </s:complexType>
          </s:element>
        </s:schema>
      </wsdl:types>
      <wsdl:message name="AddEmployeeSoapIn">
        <wsdl:part name="parameters" element="tns:AddEmployee"/>
      </wsdl:message>
      <wsdl:message name="AddEmployeeSoapOut">
        <wsdl:part name="parameters" element="tns:AddEmployeeResponse"/>
      </wsdl:message>
      <wsdl:portType name="ExampleServiceSoap">
        <wsdl:operation name="AddEmployee">
          <wsdl:input message="tns:AddEmployeeSoapIn"/>
          <wsdl:output message="tns:AddEmployeeSoapOut"/>
        </wsdl:operation>
      </wsdl:portType>
      <wsdl:binding name="ExampleServiceSoap" type="tns:ExampleServiceSoap">
        <soap:binding transport="http://schemas.xmlsoap.org/soap/http"/>
        <wsdl:operation name="AddEmployee">
          <soap:operation soapAction="https://webservices.vm.vmc/ClientSmart/AddEmployee" style="document"/>
          <wsdl:input>
            <soap:body use="literal"/>
          </wsdl:input>
          <wsdl:output>
            <soap:body use="literal"/>
          </wsdl:output>
        </wsdl:operation>
      </wsdl:binding>
      <wsdl:binding name="ExampleServiceSoap12" type="tns:ExampleServiceSoap">
        <soap12:binding transport="http://schemas.xmlsoap.org/soap/http"/>
        <wsdl:operation name="AddEmployee">
          <soap12:operation soapAction="https://webservices.vm.vmc/ClientSmart/AddEmployee" style="document"/>
          <wsdl:input>
            <soap12:body use="literal"/>
          </wsdl:input>
          <wsdl:output>
            <soap12:body use="literal"/>
          </wsdl:output>
        </wsdl:operation>
      </wsdl:binding>
      <wsdl:service name="ExampleService">
        <wsdl:port name="ExampleServiceSoap" binding="tns:ExampleServiceSoap">
          <soap:address location="http://localhost:4729/POSWebServices/ExampleService.asmx"/>
        </wsdl:port>
        <wsdl:port name="ExampleServiceSoap12" binding="tns:ExampleServiceSoap12">
          <soap12:address location="http://localhost:4729/POSWebServices/ExampleService.asmx"/>
        </wsdl:port>
      </wsdl:service>
    </wsdl:definitions>
    

1 个答案:

答案 0 :(得分:2)

有许多方法可以为Web服务生成客户端。如果您可以访问wsdl(看起来像你这样做),我建议使用像Apache Axis这样的东西来为你生成客户端类。

http://axis.apache.org/axis/java/index.html

下载Axis后,您可以运行一个简单的命令来生成客户端类:

java org.apache.axis.wsdl.WSDL2Java wsdlName