java - Web服务客户端: Use plain-text xml instead of object hierarchy

Question

我正在用 java 编写一个简单的代理:

1. 读取 XML 文件
2. 向网络服务发送请求
3. 读取网络服务响应
4. 将响应写入文件

我的第一次尝试是使用 JAXB 读取 xml 文件并生成 Java 对象。然后我使用 JAX-WS (IBM WebSphere) 发送对象。我收到作为“ResponseObject”的响应，然后将其生成为 xml 代码。我将 XML 代码写入文件。

此设置效果很好。但是……

将 java 对象发送到 WebService 时，会生成 xml，响应会再次创建 java 对象。我真的不需要那些请求和响应对象。有没有一种方法可以直接使用纯文本 xml 调用 WebService？ 并以纯文本 xml 的形式读取响应，而不是那些响应对象？

(假设 xml 文件始终有效。)

谢谢

Answer 1

可以使用 SAAJ (SOAP with Attachments API for Java)运行在比 JAX-WS 更低的级别。我希望它比 JAX-WS 使用更少的系统资源。

请参阅以下示例(从 users.skynet.be/pascalbotte/rcx-ws-doc/saajpost.htm 复制)

No more dynamic construction of the SOAP message this time, let's use a simple text editor and type the soap message we want to send.

Example 1-13. The formated SOAP message in a text file: prepared.msg

<SOAP-ENV:Envelope 
 SOAP-ENV:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" 
 xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/" 
 xmlns:enc="http://schemas.xmlsoap.org/soap/encoding/" 
 xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
 xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
 <SOAP-ENV:Header/><SOAP-ENV:Body>
  <ans1:readLS xmlns:ans1="http://phonedirlux.homeip.net/types">
   <String_1 xsi:type="xsd:string">your message or e-mail</String_1>
  </ans1:readLS>
 </SOAP-ENV:Body>
</SOAP-ENV:Envelope>

Now the code will be shorter and you can easily use it for testing purpose.

Example 1-14. Post a SOAP message in a text file, to a web service using SAAJ

  import javax.xml.soap.SOAPConnectionFactory;
  import javax.xml.soap.SOAPConnection;
  import javax.xml.soap.MessageFactory;
  import javax.xml.soap.SOAPMessage;
  import javax.xml.soap.SOAPPart;

  import java.io.FileInputStream;
  import javax.xml.transform.stream.StreamSource;

  import javax.xml.transform.TransformerFactory;
  import javax.xml.transform.Transformer;
  import javax.xml.transform.Source;

  import javax.xml.transform.stream.StreamResult;

  public class Client {

    public static void main(String[] args) {

      try {
 // Create the connection
 SOAPConnectionFactory scf = SOAPConnectionFactory.newInstance();
 SOAPConnection conn = scf.createConnection();

 // Create message
 MessageFactory mf = MessageFactory.newInstance();
 SOAPMessage msg = mf.createMessage();

 // Object for message parts
 SOAPPart sp = msg.getSOAPPart();
 StreamSource prepMsg = new StreamSource(
   new FileInputStream("path/prepared.msg"));
 sp.setContent(prepMsg);

 // Save message
 msg.saveChanges();

 // View input
 System.out.println("\n Soap request:\n");
 msg.writeTo(System.out);
 System.out.println();

 // Send
 String urlval = "http://www.pascalbotte.be/rcx-ws/rcx";
 SOAPMessage rp = conn.call(msg, urlval);

 // View the output
 System.out.println("\nXML response\n");

 // Create transformer
 TransformerFactory tff = TransformerFactory.newInstance();
 Transformer tf = tff.newTransformer();

 // Get reply content
 Source sc = rp.getSOAPPart().getContent();

 // Set output transformation
 StreamResult result = new StreamResult(System.out);
 tf.transform(sc, result);
 System.out.println();

 // Close connection
 conn.close();

      }
      catch (Exception e) {
 System.out.println(e.getMessage());
      }
    }
  }