Java 遠程調用 Hessian 簡例

<servlet>   <servlet-name>hessianService</servlet-name>   <!-- 注意這裡,這是hessian提供的 -->   <servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class>   <init-param>       <param-name>service-class</param-name>       <!-- 執行個體化後調用的類 -->       <param-value>guilinsoft.ddsx.api.WdpfImpl</param-value>   </init-param>   <load-on-startup>1</load-on-startup> </servlet>       <servlet-mapping>   <servlet-name>hessianService</servlet-name>   <url-pattern>/hessianService</url-pattern> </servlet-mapping>

感謝:綠悠悠

項目中需要即時監控裝置的目前狀態,而伺服器又在遠程,so,在網上找到了強大的Hessian,哈哈,之前我一直以為它是session的擴充..汗,看了看它的官網,有點暈,主要是它的設定檔沒明白,然後又在oschina中找到了綠悠悠同學分享的執行個體.哦也..運行調用成功,趁熱記錄一番。

類比二個項目,Demo(伺服器),client(用戶端)

GreetingAPI是介面,而GreetingServlet是介面的實現...名字沒起好..

package example;  public interface GreetingAPI {   public String hello(); public String ok(); public String no();}package example;    public class GreetingServlet  implements GreetingAPI {   private static final long serialVersionUID = 1L; private String _greeting="Hello,would!";    public String hello() {  return _greeting; } public String ok(){  return "this is greetingServlet method ok!!"; }   public void set_greeting(String greeting) {  _greeting = greeting; } public String no() {  return "this is greetingServlet method NO!!"; }  }

注意,包名需要與伺服器一致哦,不然執行個體它時,它會報出找不到的異常。GreetingAPI.java的內容跟伺服器端的一致

package example;  import java.net.MalformedURLException;  import com.caucho.hessian.client.HessianProxyFactory;import com.jzero.util.MPrint;      public class test {   public static void main(String[] args) {  String url="http://localhost:8080/Demo/hessianService";  HessianProxyFactory factory=new HessianProxyFactory();  try {   GreetingAPI api=(GreetingAPI) factory.create(url);   MPrint.print(api.hello());   MPrint.print(api.ok());   MPrint.print(api.no());  } catch (MalformedURLException e) {   // TODO Auto-generated catch block   e.printStackTrace();  } catch (ClassNotFoundException e) {   // TODO Auto-generated catch block   e.printStackTrace();  } }}

-------【程式調試列印資料:Hello,would!】--------------【程式調試列印資料:this is greetingServlet method ok!!】--------------【程式調試列印資料:this is greetingServlet method NO!!】-------

來源:Java 遠程調用 Hessian 簡例

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