推荐回答(1个)
、客户端开发者通过URL得到WSDL文件。(通过HTTP访问可以得到,http://?wsdl)
2、客户端根据WSDL的描述,通过HTTP POST发送SOAP消息给服务器端。
3、服务器端Listener接受到SOAP请求消息,对JAVA来说,通常是一个servlet或者EJB。Listener把消息转发给 Dispatcher,有时候listener和Dispatcher也可能是同一个类。Dispatcher会把请求消息交给WebService的运行终端。
4、这时候,服务器端会将HTTP request转成服务器端的消息类型,形成javax.xml.ws.handler.MessageContext,并处理SOAP消息的头信息,如mustUnderstand。
5、如果在服务器端配置了handler,会调用handler的handleMessage方法,通常用handler来保存消息,解密或者保证消息到达的顺序。handler通过在@HandlerChain标注配置handlers.xml文件内容为:
Xml代码
WSSOAPHandler
com.cxf.test.WSSOAPHandler
WSHandler
com.cxf.test.WSHandler
6、SOAP消息被反序列化为JAVA对象,传到真正的实现业务的类。
7、调用真正的业务方法,执行后利用JAXB注解序列化成SOAP返回消息。
8、如果配置了handler,会调用handler的handleMessage方法。如果业务方法有异常抛出,把异常转为SOAP fault 消息。
9、Listener通过HTTP把response返回给客户端。
总体来讲:整个过程是一个Requset XML(SOAP)-->JAXB-->JAVA Object-->JAXB-->Response XML(SOAP)的过程
2、从一个例子开始
只需要几个简单的annotation即可发布一个基于JAX-WS的webservice服务:
Java代码
@WebService
public interface HelloJAXWS {
public String sayHello();
}
@WebService
public class HelloJAXWSImpl implements HelloJAXWS {
@WebMethod
public String sayHello() {
return "Hello, JAX-WS";
}
}
在一个main函数中发布该服务:
Java代码
Endpoint.publish("http://localhost:8080/service/helloJaxWs", new HelloJAXWSImpl());
这样我们就可以在浏览器通过上面的URL访问:
http://localhost:8080/service/helloJaxWs?wsdl
如果看到返回的xml格式的文档表示我们就发布成功。
下面来看看客户端代码,在JDK中也提供了相应的工具来根据wsdl生成客户端代码这就是wsimport,可以通过wsimport -help来查看相应的参数。这里采用了以下几个参数
Java代码
wsimport -verbose -p com.sample.sws.ws -keep http://localhost:8080/service/helloJaxWs?wsdl
-verbose 显示编译的信息
-p 指定客户端package
-keep 保存生成客户端的源文件和编译好的class文件
在指定的package下就可以看到生成的service代理类,当然具体的类名会根据之前@WebService()后的参数设置,比如我server端的服务类声明如下:
Java代码
@WebService(serviceName = "helloJaxWsService", endpointInterface = "org.ws.server.ws.chap1.impl.HelloJAXWSImpl")
@SOAPBinding(style = Style.DOCUMENT)
生成的客户端代理类也是根据上面的serviceName来HelloJaxWsService
下面是客户端调用的代码
Java代码
HelloJAXWSImpl hellpJaxWs = new HelloJaxWsService().getHelloJAXWSImplPort();
System.out.println(hellpJaxWs.sayHello());
这样就完成了一个创建webservice->发布->生成客户端代码->客户端调用的整个过程
3、传递复杂对象
从上面2中的例子是返回String对象,其实JAX-WS原生对复杂对象都有很好的支持,如我们一些业务上的PO或List对象等。下面来看一个例子:
Java代码
@WebService
public interface JaxWsService {
public Address getAddress(String id);
public Person getPerson(String id);
List getAddressList(Address address);
}
这里申明了Address和Person对象,其中Person包含一个List属性:
Java代码
public class Person implements Serializable {
private static final long serialVersionUID = 8336803120311071811L;
private String username;
private Date birthday;
private List addresses;
//以下省略若干
}
public class Address implements Serializable {
private static final long serialVersionUID = 5038515089191304705L;
private String street;
private String city;
private int port;
//以下省略若干
}
在对上面的接口做简单的实现,按照上面的流程生成客户端代码调用即可达到预期的效果。这里不在赘述例子可见代码,这里想要说明的是JAX-WS中对大多数普通对象不需要做任何处理即可传输
4、wsimport与wsgen
这两个工具位于$JAVA_HOME$/bin目录
wsimport 前面已经用到这个工具,用来解析一个存在的WSDL文档,生成客户端代码。通过wsimport查询参数或者http://jax-ws.java.net/jax-ws-ea3/docs/wsimport.html
wsgen 工具还可以用来从一个Web服务中生成对应的WSDL文档
如
Java代码
@WebService
public class JaxWsWebServiceImpl implements JaxWsWebService {
@WebMethod
public @WebResult
String getMessage() {
return "Hello";
}
}
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