Java实现SOAP协议之 HelloWorld

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java

SOAP是把基于HTTP的WEB技术与XML的灵活性和可扩展性组合在了一起。

准备：

1. 准备一个web server。Tomcat 下载地址 http://tomcat.apache.org/

本例使用版本 apache-tomcat-7.0.54-windows-x64.zip

2. 写一个servlet send用来发送一个SOAP的message并添加一个附件。

3. 写一个servlet receive用来做SOAP message的解析并返回一个response。

4. 写一个简单的html页面触发 servlet A。

开发工具：

eclipse 版本 eclipse-jee-juno-SR2-win32-x86_64

下载地址：

http://www.eclipse.org/downloads/

下载J2EE版本的eclipse里面包含了SOAP常用的一些jar，但这个版本的没有jaxm-api.jar，这个需要额外下载

然后倒入。

代码结构：

web.xml代码如下：

Xml代码  
<?xml version="1.0" encoding="ISO-8859-1"?>  
  
<!DOCTYPE web-app  
    PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.2//EN"  
    "http://java.sun.com/j2ee/dtds/web-app_2_2.dtd">  
  
<web-app>  
    <servlet>  
        <servlet-name>DemoSend</servlet-name>  
        <servlet-class>cody.soap.demo.DemoSend</servlet-class>  
    </servlet>  
  
    <servlet>  
        <servlet-name>DemoReceiver</servlet-name>  
        <servlet-class>cody.soap.demo.DemoReceiver</servlet-class>  
    </servlet>  
  
    <servlet-mapping>  
        <servlet-name>DemoSend</servlet-name>  
        <url-pattern>/DemoSend</url-pattern>  
    </servlet-mapping>  
  
    <servlet-mapping>  
        <servlet-name>DemoReceiver</servlet-name>  
        <url-pattern>/DemoReceiver</url-pattern>  
    </servlet-mapping>  
</web-app>  

DemoSend.java

Java代码  
package cody.soap.demo;  
  
import java.io.FileOutputStream;  
import java.io.IOException;  
import java.io.OutputStream;  
import java.net.URL;  
  
import javax.activation.DataHandler;  
import javax.servlet.ServletException;  
import javax.servlet.http.HttpServlet;  
import javax.servlet.http.HttpServletRequest;  
import javax.servlet.http.HttpServletResponse;  
import javax.xml.soap.AttachmentPart;  
import javax.xml.soap.MessageFactory;  
import javax.xml.soap.SOAPBody;  
import javax.xml.soap.SOAPConnection;  
import javax.xml.soap.SOAPConnectionFactory;  
import javax.xml.soap.SOAPEnvelope;  
import javax.xml.soap.SOAPException;  
import javax.xml.soap.SOAPHeader;  
import javax.xml.soap.SOAPMessage;  
import javax.xml.soap.SOAPPart;  
  
public class DemoSend extends HttpServlet {  
  
    /** 
     *  
     */  
    private static final long serialVersionUID = 1L;  
  
    private SOAPConnection connection;  
    @Override  
    public void init() throws ServletException {  
        super.init();  
        try {  
            SOAPConnectionFactory connectionFactory = SOAPConnectionFactory.newInstance();  
            connection = connectionFactory.createConnection();  
        } catch (UnsupportedOperationException e) {  
            e.printStackTrace();  
        } catch (SOAPException e) {  
            e.printStackTrace();  
        }  
    }  
  
    @Override  
    protected void doGet(HttpServletRequest request, HttpServletResponse response)  
            throws ServletException, IOException {  
        String outString ="<HTML><H1>Sending and reading the SOAP Message</H1><P>";  
        try {  
            MessageFactory messageFactory = MessageFactory.newInstance();  
            SOAPMessage outgoingMessage = messageFactory.createMessage();  
            SOAPPart soappart = outgoingMessage.getSOAPPart();  
            SOAPEnvelope envelope = soappart.getEnvelope();  
            SOAPHeader header = envelope.getHeader();  
            SOAPBody body = envelope.getBody();  
              
            body.addBodyElement(envelope.createName("numberAvailable", "laptops", "http://ecodl.taobao.com/")).addTextNode("216");  
              
            StringBuffer serverUrl = new StringBuffer();  
            serverUrl.append(request.getScheme()).append("://").append(request.getServerName());  
            serverUrl.append(":").append(request.getServerPort()).append(request.getContextPath());  
            String baseUrl = serverUrl.toString();  
            URL url = new URL(baseUrl + "/test.html");  
              
            AttachmentPart attachmentpart = outgoingMessage.createAttachmentPart(new DataHandler(url));  
            attachmentpart.setContentType("text/html");  
            outgoingMessage.addAttachmentPart(attachmentpart);  
              
            URL client = new URL(baseUrl + "/DemoReceiver");  
              
            FileOutputStream outgoingFile = new FileOutputStream("out.msg");  
            outgoingMessage.writeTo(outgoingFile);  
            outgoingFile.close();  
              
            outString += "SOAP outgoingMessage sent (see out.msg). <BR>"+baseUrl+"<BR>";  
              
            SOAPMessage incomingMessage = connection.call(outgoingMessage, client);  
              
            if (incomingMessage != null) {  
                FileOutputStream incomingFile = new FileOutputStream("in.msg");  
                incomingMessage.writeTo(incomingFile);  
                incomingFile.close();  
                outString += "SOAP outgoingMessage received (see in.msg).</HTML>";  
            }  
        } catch (SOAPException e) {  
            e.printStackTrace();  
        }  
          
        try {  
            OutputStream outputStream = response.getOutputStream();  
            outputStream.write(outString.getBytes());  
            outputStream.flush();  
            outputStream.close();  
        } catch (IOException e) {}  
    }  
  
    @Override  
    protected void doPost(HttpServletRequest req, HttpServletResponse resp)  
            throws ServletException, IOException {  
        doGet(req, resp);  
    }  
  
      
}  

DemoReceiver.java

Java代码  
package cody.soap.demo;  
  
import java.util.Iterator;  
  
import javax.servlet.ServletConfig;  
import javax.servlet.ServletException;  
import javax.xml.messaging.JAXMServlet;   
import javax.xml.messaging.ReqRespListener;  
import javax.xml.soap.MessageFactory;  
import javax.xml.soap.SOAPBody;  
import javax.xml.soap.SOAPElement;  
import javax.xml.soap.SOAPEnvelope;  
import javax.xml.soap.SOAPException;  
import javax.xml.soap.SOAPMessage;  
import javax.xml.soap.SOAPPart;  
  
public class DemoReceiver extends JAXMServlet implements ReqRespListener{  
  
    /** 
     * Generated automatically 
     */  
    private static final long serialVersionUID = 1L;  
    private static MessageFactory messageFactory = null;  
    @Override  
    public void init(ServletConfig servletConfig) throws ServletException {  
        super.init(servletConfig);  
        try {  
            messageFactory = MessageFactory.newInstance();  
        } catch (SOAPException e) {  
            e.printStackTrace();  
        }  
    }  
  
    @Override  
    public SOAPMessage onMessage(SOAPMessage msg) {  
        SOAPPart soappart = msg.getSOAPPart();  
        try {  
            SOAPEnvelope incomingEnvelope;        
            incomingEnvelope = soappart.getEnvelope();        
            SOAPBody body = incomingEnvelope.getBody();  
      
            Iterator<?> iterator = body.getChildElements(incomingEnvelope.createName("numberAvailable", "laptops", "http://ecodl.taobao.com/"));  
      
            SOAPElement element;  
            element = (SOAPElement) iterator.next();  
      
            SOAPMessage message = messageFactory.createMessage();  
            SOAPEnvelope envelope = message.getSOAPPart().getEnvelope();  
      
            SOAPBody responsebody = envelope.getBody();  
            String responseText = "Got the SOAP message indicating there are " + element.getValue() + " laptops available.";  
            responsebody.addChildElement(envelope.createName("Response")).addTextNode(responseText);  
      
            return message;  
        } catch (SOAPException e) {  
            e.printStackTrace();  
            return null;  
        }  
    }  
  
}  

test.xml

Html代码  
<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<HTML>  
    <HEAD>  
        <TITLE>SOAP and Java</TITLE>  
    </HEAD>  
  
    <BODY>  
        <H1>SOAP and Java</H1>  
           Click <A HREF="DemoSend">here</a> to send the SOAP message.  
    </BODY>  
</HTML>  

out.msg

Xml代码  
------=_Part_0_1985246804.1403343570084  
Content-Type: text/xml; charset=utf-8  
  
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">  
<SOAP-ENV:Header/>  
<SOAP-ENV:Body>  
<laptops:numberAvailable xmlns:laptops="http://ecodl.taobao.com/">216</laptops:numberAvailable>  
</SOAP-ENV:Body>  
</SOAP-ENV:Envelope>  
------=_Part_0_1985246804.1403343570084  
Content-Type: text/html  
  
<?xml version="1.0" encoding="UTF-8" ?>  
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">  
<HTML>  
    <HEAD>  
        <TITLE>SOAP and Java</TITLE>  
    </HEAD>  
  
    <BODY>  
        <H1>SOAP and Java</H1>  
           Click <A HREF="DemoSend">here</a> to send the SOAP message.  
    </BODY>  
</HTML>  
  
------=_Part_0_1985246804.1403343570084--  

in.msg

Xml代码  
<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">  
<SOAP-ENV:Header/>  
<SOAP-ENV:Body>  
<Response>Got the SOAP message indicating there are 216 laptops available.  
</Response>  
</SOAP-ENV:Body>  
</SOAP-ENV:Envelope>  

原文：http://www.informit.com/library/content.aspx?b=STY_XML_21days&seqNum=228

在Tomcat上部署的目录结构：

webapps [This is a directory]
|____soapdemoserver [This is a directory]
     |____test.html [Our starting Web page]
     |____WEB-INF [This is a directory]
          |____web.xml [Configures Tomcat]
          |____classes [This is a directory]
               |____cody/soap/demo [This is a directory]
                    |____DemoReceiver.class [The server servlet]
                    |____DemoSend.class [The client servlet]

jaxm-api.jar (22.5 KB)
下载次数: 127

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