如何使用JDK1.6的JAX-WS编写WebService

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一、Web services概念

Web services是客户端和服务端通过万维网的HTTP协议进行交互。

二、JAX-WS实现简单的Web services

2.1 建一个名为HelloServer的Web应用作为Webservice客户端

2.2 在HelloServer应用下新建一个类：

package helloservice.endpoint; import javax.jws.WebMethod; import javax.jws.WebService; @WebService public class Hello {     private String message = new String("Hello, ");     public void Hello() {     }     @WebMethod     public String sayHello(String name) {         return message + name + ".";      } }

2.3 在weblogic下发布HelloServer应用,应用名为WebRoot。

2.4 在IE里面打开http://localhost:7001/WebRoot/HelloService?wsdl

如果可以查看到wsdl的内容说明发布成功.比如：

    -   -   -  -  -            -         -         -  -        
        -      -      -         - 
       
       -  -              

2.5 运行wsimport

wsimport是JDK1.6特有的,[JAVA_HOME]/bin下。

2.5.1 在E:\Program Files\PowerCmd>目录下,新建一个文件夹generate。

2.5.2 运行如下命令：

wsimport -s generate http://localhost:7001/WebRoot/HelloService?wsdl

如果返回

parsing WSDL...generating code...

说明运行成功。

2.5.3 查看generate目录,可以看到生成了JAVA文件,与generate同级的目录下,还有class文件。(这里生成的JAVA文件,客户端需要用到)

生成的HelloService.java如下：

package helloservice.endpoint;  import java.net.MalformedURLException;  import java.net.URL;  import javax.xml.namespace.QName;  import javax.xml.ws.Service;  import javax.xml.ws.WebEndpoint;  import javax.xml.ws.WebServiceClient;  import javax.xml.ws.WebServiceFeature;  /**   * This class was generated by the JAX-WS RI.   * JAX-WS RI 2.1.1 in JDK 6   * Generated source version: 2.1   *    */  @WebServiceClient(name = "HelloService", targetNamespace = "http://endpoint.helloservice/", wsdlLocation = "http://localhost:7001/WebRoot/HelloService?wsdl")  public class HelloService      extends Service  {      private final static URL HELLOSERVICE_WSDL_LOCATION;      static {          URL url = null;          try {              url = new URL("http://localhost:7001/WebRoot/HelloService?wsdl");          } catch (MalformedURLException e) {              e.printStackTrace();          }          HELLOSERVICE_WSDL_LOCATION = url;      }        public HelloService(URL wsdlLocation, QName serviceName) {          super(wsdlLocation, serviceName);      }        public HelloService() {          super(HELLOSERVICE_WSDL_LOCATION, new QName("http://endpoint.helloservice/", "HelloService"));      }      /**       *        * @return       *     returns Hello       */      @WebEndpoint(name = "HelloPort")      public Hello getHelloPort() {          return (Hello)super.getPort(new QName("http://endpoint.helloservice/", "HelloPort"), Hello.class);      }      /**       *        * @param features       *     A list of {@link javax.xml.ws.WebServiceFeature} to configure on the proxy.  Supported features not in the features parameter will have their default values.       * @return       *     returns Hello       */      @WebEndpoint(name = "HelloPort")      public Hello getHelloPort(WebServiceFeature... features) {          return (Hello)super.getPort(new QName("http://endpoint.helloservice/", "HelloPort"), Hello.class, features);      }  }

2.6 建一个名为HelloClient的Web应用作为WebService客户端。

2.7 将3.5.3生成的JAVA文件复制到HelloClient的src下。

2.8 新建一个HelloServlet文件，如下：

package webclient; import helloservice.endpoint.HelloService; import java.io.IOException; import java.io.PrintWriter; import javax.servlet.ServletException; import javax.servlet.annotation.WebServlet; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.xml.ws.WebServiceRef;  @WebServlet(name = "HelloServlet", urlPatterns = { "/HelloServlet" }) public class HelloServlet extends HttpServlet {     @WebServiceRef(wsdlLocation = "http://localhost:7001/WebRoot/HelloService?wsdl")     private HelloService service;      /**      * Constructor of the object.      */     public HelloServlet() {         super();     }     /**      * Destruction of the servlet. 
      */     public void destroy() {         super.destroy(); // Just puts "destroy" string in log         // Put your code here     }     /**      * The doGet method of the servlet. 
      *      * This method is called when a form has its tag value method equals to get.      *       * @param request the request send by the client to the server      * @param response the response send by the server to the client      * @throws ServletException if an error occurred      * @throws IOException if an error occurred      */     public void doGet(HttpServletRequest request, HttpServletResponse response)             throws ServletException, IOException {         processRequest(request, response);     }     /**      * The doPost method of the servlet. 
      *      * This method is called when a form has its tag value method equals to post.      *       * @param request the request send by the client to the server      * @param response the response send by the server to the client      * @throws ServletException if an error occurred      * @throws IOException if an error occurred      */     public void doPost(HttpServletRequest request, HttpServletResponse response)             throws ServletException, IOException {         processRequest(request, response);     }     /**      * Initialization of the servlet. 
      *      * @throws ServletException if an error occurs      */     public void init() throws ServletException {         // Put your code here     }          /**      * Processes requests for both HTTP GET and POST      * methods.      *       * @param request      *            servlet request      * @param response      *            servlet response      * @throws ServletException      *             if a servlet-specific error occurs      * @throws IOException      *             if an I/O error occurs      */     protected void processRequest(HttpServletRequest request,             HttpServletResponse response) throws ServletException, IOException {         response.setContentType("text/html;charset=UTF-8");         PrintWriter out = response.getWriter();         try {             out.println("");             out.println("");             out.println("");             out.println("");             out.println("");             out.println("
Servlet HelloServlet at "                     + request.getContextPath() + "
");             out.println("
" + sayHello("world") + "
");             out.println("");             out.println("");         } finally {             out.close();         }     }     // doGet and doPost methods, which call processRequest, and     // getServletInfo method     private String sayHello(java.lang.String arg0) {         helloservice.endpoint.Hello port = service.getHelloPort();         return port.sayHello(arg0);     } }

2.9 配置HelloClient的Web.xml,增加如下代码：

     HelloServlet      HelloServlet     HelloServlet     webclient.HelloServlet         HelloServlet     /servlet/HelloServlet   

2.10 发布HelloClient应用。

2.11 在IE录入http://localhost:7111/servlet/HelloServlet

页面内容如下说明WebService调用成功!

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