梦相随1006

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webservice06#异常#Handler

1, 异常处理

package com.yangw.soap.service;

public class UserException extends Exception {

    public UserException() {
        super();
    }
    public UserException(String message, Throwable cause) {
        super(message, cause);
    }
    public UserException(String message) {
        super(message);
    }
    public UserException(Throwable cause) {
        super(cause);
    }   
}

  为login()方法增加抛异常

package com.yangw.soap.service;

import javax.jws.WebParam;
import javax.jws.WebResult;
import javax.jws.WebService;

//说明该接口是服务接口
@WebService
public interface IMyService {
    ......
     @WebResult(name="user")
     public User login(@WebParam(name="username")String username,
             @WebParam(name="password")String password) throws UserException;   
    ...... }
package com.yangw.soap.service;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import javax.jws.WebService;

//说明该类是服务接口的实现类
@WebService(endpointInterface="com.yangw.soap.service.IMyService")
public class MyServiceImpl implements IMyService {

......
    @Override
    public User login(String username, String password) throws UserException{
        for(User user:users){
            if(user.getUserName().equals(username)&&user.getPassword().equals(password)){
                return user;
            }
        }
        throw new UserException("用户不存在!");
    }

......

}
    /**
     * soap消息传递--测试异常处理
     */
    @Test
    public void test06() {
        
        try {
            //1,创建服务
            URL url=new URL(wsdlUrl);
            QName qName=new QName(ns,"MyServiceImplService");
            Service service=Service.create(url, qName);
            
            //2,创建Dispatch    (创建Port的时候指定名称空间)
            Dispatch<SOAPMessage> dispatch=service.createDispatch(new QName(ns,"MyServiceImplPort"),
                    SOAPMessage.class, Service.Mode.MESSAGE);
    
            //3, 创建SOAPMessage
             SOAPMessage msg=MessageFactory.newInstance().createMessage();
             SOAPEnvelope envelope=msg.getSOAPPart().getEnvelope();
            
             SOAPBody body=envelope.getBody();
            
             //4, 创建QName来指定消息中传递的数据
             QName eName=new QName(ns,"login", "nn"); //前缀必须指定,名字可以任意 <nn:add xmlns="XXX" />
             SOAPBodyElement bEle=body.addBodyElement(eName);
        /*
         * 因为username=yang password=wei,这个用户是不存在,因此会抛UserException,
         * 这个异常会被SOAPFaultException捕获,Webservice会对他处理,因为服务器不会抛异常出来,而是在我们客户端打印我们的异常信息 “用户不存在!”
         * webservice会将我们的异常转换为
         * <message name="UserException"><part name="fault" element="tns:UserException"/></message>

         */
bEle.addChildElement(
"username").setValue("yang"); bEle.addChildElement("password").setValue("wei"); msg.writeTo(System.out); //输出消息到控制台 System.out.println("\n invoke ..."); //5, 通过Dispatch传递消息 SOAPMessage resMsg= dispatch.invoke(msg); resMsg.writeTo(System.out); System.out.println(); }catch (SOAPFaultException e) { System.out.println(e.getMessage()); } catch (SOAPException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } }

      控制台打印的信息 如下:

<SOAP-ENV:Envelope xmlns:SOAP-ENV="http://schemas.xmlsoap.org/soap/envelope/">
  <
SOAP-ENV:Header/>
  <
SOAP-ENV:Body>
    <
nn:login xmlns:nn="http://service.soap.yangw.com/">
      <
username>yang</username>
      <
password>wei</password>
    </
nn:login>
   </
SOAP-ENV:Body>
 </
SOAP-ENV:Envelope> invoke ... 用户不存在!

 2,Handler处理SOAP消息

  LogicalHandler: 只能获取SOAPBody的信息,下面简称 LH;

  SOAPHandler:   可以 获取SOAPMessage的信息,下面简称 SH

  客户端,服务器端都可以设置若干个 LH SH !

 

  例子:客户端设置了 SH1 LH1 SH2 LH2 LH3,服务端设置了SH2 SH3 LH2 LH3 LH1

  那么最终通过的Handler形式是: LH1 LH2 LH3 SH1 SH2   SH2 SH3 LH2 LH3 LH1

  

  需要使用wsimport命令将代码导入到新的工程中!!!

  创建SOAPHandler的顺序:

  1> 创建一个类实现SOAPHandler接口

  2>在handlerMessage()方法中编写相应的处理代码 

package com.yangw.soap.service.handler;

import java.util.Set;
import javax.xml.namespace.QName;
import javax.xml.ws.handler.MessageContext;
import javax.xml.ws.handler.soap.SOAPHandler;
import javax.xml.ws.handler.soap.SOAPMessageContext;
/**
 * 这里写了一个HeaderHandler类,实现了接口SOAPHandler,需要设置泛型为SOAPMessageContext
 * @author yangw
 */
public class HeaderHandler implements SOAPHandler<SOAPMessageContext> {

    @Override
    public boolean handleMessage(SOAPMessageContext context) {
        System.out.println("handler message");
        return true;
    }
    @Override
    public boolean handleFault(SOAPMessageContext context) {
        System.out.println("fault");
        return false;
    }
    @Override
    public void close(MessageContext context) {
        
    }
    @Override
    public Set<QName> getHeaders() {
        return null;
    }
}

  3>配置handler,配置文件名字可以随便起,放到类路径下即可

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<javaee:handler-chains 
     xmlns:javaee="http://java.sun.com/xml/ns/javaee" 
     xmlns:xsd="http://www.w3.org/2001/XMLSchema">
  <javaee:handler-chain>
    <javaee:handler>
      <javaee:handler-class>com.yangw.soap.service.handler.HeaderHandler</javaee:handler-class>
    </javaee:handler>
  </javaee:handler-chain>
</javaee:handler-chains>

 

 handler-chain.xml 文件放置在类路径下即可.

 3>在服务上开启过滤器链 @HandlerChain(file="handler-chain.xml")

package com.yangw.soap.service;

import javax.jws.HandlerChain;
import javax.xml.ws.Service;
import javax.xml.ws.WebServiceClient;

@WebServiceClient(name = "MyServiceImplService", targetNamespace = "http://service.soap.yangw.com/", wsdlLocation = "http://localhost:8899/ns?wsdl")
@HandlerChain(file="handler-chain.xml")
public class MyServiceImplService extends Service {
  ......
}

  4>测试类

 

package com.yangw.soap.service;

public class Test {

    public static void main(String[] args) {
        MyServiceImplService mis=new MyServiceImplService();
        IMyService service=mis.getMyServiceImplPort();
        try {
            /**
             * 因为后端没有yangw wei 这个用户,因此控制台打印如下:
             *  handler message
             *    fault
             *  用户不存在!
             */
            service.login("yangw", "123456");
            System.out.println("over");
            /**
             * 存在用户 yangw  123456,打印如下:
             *  handler message
             *    handler message
             *  over
             */
            
        } catch (UserException_Exception e) {
            System.out.println(e.getMessage());
        }
        
    }
}

 

 

 

posted on 2014-03-03 19:11  梦相随1006  阅读(476)  评论(0编辑  收藏  举报