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技術剖析:基于Axis的自定義對象序列化

2019-11-18 12:50:50
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  由于最近公司采用Web Services技術做企業應用集成(EAI)相關的項目,有關技術人員反應采用Axis不能傳遞用戶自定義對象。
  
  錯誤信息大體如下:
  
  AxisFault
  
  faultCode: {http://schemas.xmlsoap.org/soap/envelope/}Server.userException
  
  faultSubcode:
  
  faultString: java.io.IOException: No serializer found for class com.whcyit.axis.SimpleObject in registry org.apache.axis.encoding.TypeMappingDelegate@da3a1e
  
  faultActor:
  
  faultNode:
  
  faultDetail:
  
  {http://xml.apache.org/axis/}stackTrace:java.io.IOException: No serializer found for class com.whcyit.axis.SimpleObject in registry org.apache.axis.encoding.TypeMappingDelegate@da3a1e
  
  at org.apache.axis.encoding.SerializationContext.serializeActual(SerializationContext.java:1429)
  
  對于Web Services的接觸已經是4年多前的事情了,基本上對于Web Services只是存在一個概念了。抱著疑問,決定自己試一下到底怎么回事?
  
  最后通過2個多小時的測試,終于把問題解決了。解決方式如下:
  
  1. 在Axis服務端,注冊自定義對象的序列化/反序列化器
  
  主要是修改axis安裝目錄下WEB-INF/server-config.wsdd文件。
  
  <service name="SimpleObjectService" provider="java:RPC"> <parameter name="allowedMethods" value="*"/> <parameter name="className" value="com.whcyit.axis.SimpleObjectService"/> <beanMapping languageSpecificType="java:com.whcyit.axis.SimpleObject" qname="ns:SimpleObject" xmlns:ns="urn:BeanService"/></service>
  
  注重service/beanMapping的定義。languageSpecificType中定義使用那個類, qname定義類的名稱。
  
  2. 在Axis客戶端,注冊自定義對象的序列化/反序列化器。
  
  核心代碼如下:
  
  //創建調用對象Service service = new Service();Call call = null;call = (Call) service.createCall();//注冊SimpleObject的序列化類型QName qn = new QName("urn:BeanService","SimpleObject");call.registerTypeMapping(SimpleObject.class, qn,  new BeanSerializerFactory(SimpleObject.class, qn),  new BeanDeserializerFactory(SimpleObject.class, qn));
  
  全部代碼示例如下:
  
  //SimpleObject.java
  
  //Web Service對象傳遞的對象package com.whcyit.axis;import java.io.Serializable; public class SimpleObject implements Serializable {   /**  *   */  PRivate static final long serialVersionUID = -6414428095965735488L;   private int i = 0;   private float f = 0.0f;   private String str = "";    public SimpleObject() {    }   public float getFloat() {  return f;  }   public void setFloat(float f) {  this.f = f;  }   public int getInt() {  return i;  }   public void setInt(int i) {  this.i = i;  }   public String getString() {  return str;  }   public void setString(String str) {  this.str = str;  }}
  
  // SimpleObjectService.java
  
  //服務程序
  
  package com.whcyit.axis;public class SimpleObjectService {  public String sayHello(String name) {  return "Hello " + name +"!";  }    public String getString(SimpleObject obj) {  System.out.println("SimpleObjectService getString invoked!");  return "return by serviced:"+obj.getString();  }    public SimpleObject createSimpleObject(int i,float f,String str) {  System.out.println("SimpleObjectService createSimpleObject invoked!");  SimpleObject so = new SimpleObject();  so.setInt(i);  so.setFloat(f);  so.setString(str);  return so;    } }
  
  // SimpleObjectClient.java
  
  //客戶端調用文件
  
  package com.whcyit.axis; import javax.xml.namespace.QName; import org.apache.axis.client.Call;import org.apache.axis.client.Service;import org.apache.axis.encoding.ser.BeanDeserializerFactory;import org.apache.axis.encoding.ser.BeanSerializerFactory; public class SimpleObjectClient {   /**  * @param args  */  public static void main(String[] args) {  String ret = "";  try {  String wsdlUrl = "http://localhost:8080/axis/services/SimpleObjectService?wsdl";  String nameSpaceUri = "http://localhost:8080/axis/services/SimpleObjectService";  //String wsdlUrl = "http://10.68.19.24:8080/sample/services/SimpleObjectService?wsdl";  //String nameSpaceUri = "http://10.68.19.24:8080/sample/services/SimpleObjectService";   //創建調用對象  Service service = new Service();  Call call = null;  call = (Call) service.createCall();    //注冊SimpleObject的序列化類型  QName qn = new QName("urn:BeanService","SimpleObject");  call.registerTypeMapping(SimpleObject.class, qn,  new BeanSerializerFactory(SimpleObject.class, qn),  new BeanDeserializerFactory(SimpleObject.class, qn));   //調用sayHello  System.out.println(">>>sayHello");  call.setOperationName(new QName(nameSpaceUri, "sayHello"));  call.setTargetEndpointAddress(new java.net.URL(wsdlUrl));   ret = (String) call.invoke(new Object[] { "liu2" });  System.out.println("return value is " + ret);    //調用getDesc  System.out.println(">>>getString");  SimpleObject so = new SimpleObject();  so.setString("hello!");  QName getDescQn = new QName(nameSpaceUri, "getString");   call.setOperationName(getDescQn);  call.setTargetEndpointAddress(new java.net.URL(wsdlUrl));  ret = (String) call.invoke(new Object[] { so });  System.out.println("return value is " + ret);    //調用createSimpleObject  System.out.println(">>>createSimpleObject");  QName getObjectQn = new QName(nameSpaceUri, "createSimpleObject");   call.setOperationName(getObjectQn);  call.setTargetEndpointAddress(new java.net.URL(wsdlUrl));  SimpleObject rtnSO = (SimpleObject) call.invoke(new Object[] { new Integer(1),new Float(0.1f),"liu2" });  System.out.println("return object " + rtnSO.getString());   } catch (Exception ex) {  ex.printStackTrace();  }  } }
  
  //server-config.wsdd
  
  //服務端配置文件
  
  <?xml version="1.0" encoding="UTF-8"?><deployment xmlns="http://xml.apache.org/axis/wsdd/" xmlns:java="http://xml.apache.org/axis/wsdd/providers/java"> <globalConfiguration> <parameter name="adminPassWord" value="admin"/> <parameter name="attachments.Directory" value="C:/eclipse/workspace/bookstore/WEB-INF/attachments"/> <parameter name="attachments.implementation" value="org.apache.axis.attachments.AttachmentsImpl"/> <parameter name="sendXsiTypes" value="true"/> <parameter name="sendMultiRefs" value="true"/> <parameter name="sendXMLDeclaration" value="true"/> <parameter name="axis.sendMinimizedElements" value="true"/> <requestFlow>  <handler type="java:org.apache.axis.handlers.JWSHandler">  <parameter name="scope" value="session"/>  </handler>  <handler type="java:org.apache.axis.handlers.JWSHandler">  <parameter name="scope" value="request"/>  <parameter name="extension" value=".jwr"/>  </handler> </requestFlow> </globalConfiguration> <handler name="LocalResponder" type="java:org.apache.axis.transport.local.LocalResponder"/> <handler name="Authenticate" type="java:org.apache.axis.handlers.SimpleAuthenticationHandler"/> <handler name="URLMapper" type="java:org.apache.axis.handlers.http.URLMapper"/> <service name="Version" provider="java:RPC"> <parameter name="allowedMethods" value="getVersion"/> <parameter name="className" value="org.apache.axis.Version"/> </service> <service name="SimpleObjectService" provider="java:RPC"> <parameter name="allowedMethods" value="*"/> <parameter name="className" value="com.whcyit.axis.SimpleObjectService"/> <beanMapping languageSpecificType="java:com.whcyit.axis.SimpleObject" qname="ns:SimpleObject" xmlns:ns="urn:BeanService"/> </service> <service name="AdminService" provider="java:MSG"> <parameter name="allowedMethods" value="AdminService"/> <parameter name="enableRemoteAdmin" value="false"/> <parameter name="className" value="org.a

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