Hession入门

昨天发现有这样的好东西！研究了一下，发现很不错！介绍个大家学习学习，而且这个资料比较少，希望能让大家入门了！

相比WebService，Hessian更简单、快捷。采用的是二进制RPC协议，因为采用的是二进制协议，所以它很适合于发送二进制数据。下面演示一个简单的Hessian示例程序。

 

定义一个接口

 

package study.hessian; public interface IBasic { public String hello(); public Person getPerson(); }

一个接口的实现类

package study.hessian; public class BasicService implements IBasic { private String hello= "Hello,<a href="/tag/vincent/" target="_blank" class="keywords">vincent</a>"; public String hello() { return hello; } public Person getPerson() { Person person = new Person(); person.setColor("Yello"); person.setLength("176cm"); person.setName("<a href="/tag/vincent/" target="_blank" class="keywords">vincent</a>"); return person; } }

 定义一个实体，必须实现序列化接口，因为要通过网络传输

package study.hessian; import java.io.Serializable; public class Person implements Serializable{ private static final long serialVersionUID = 3276641446246664L; private String name; private String length; private String color; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getLength() { return length; } public void setLength(String length) { this.length = length; } public String getColor() { return color; } public void setColor(String color) { this.color = color; } }

web.xml文件

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <<a href="/tag/welcomefile/" target="_blank" class="keywords">welcome-file</a>-list> <<a href="/tag/welcomefile/" target="_blank" class="keywords">welcome-file</a>>index.jsp</<a href="/tag/welcomefile/" target="_blank" class="keywords">welcome-file</a>> </<a href="/tag/welcomefile/" target="_blank" class="keywords">welcome-file</a>-list> <servlet> <servlet-name>hello</servlet-name> <servlet-class> com.caucho.hessian.server.HessianServlet </servlet-class> <init-p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-name>home-class</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-name> <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-value>study.hessian.BasicService</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-value> </init-p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> <init-p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-name>home-api</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-name> <p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-value>study.hessian.IBasic</p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m-value> </init-p<a href="/tag/ara/" target="_blank" class="keywords">ara</a>m> </servlet> <<a href="/tag/servletmapping/" target="_blank" class="keywords">servlet-mapping</a>> <servlet-name>hello</servlet-name> <url-pattern>/hello</url-pattern> </<a href="/tag/servletmapping/" target="_blank" class="keywords">servlet-mapping</a>> </web-app>

客户端的类（JAVA）

package study.hessian; import com.caucho.hessian.client.HessianProxyFactory; public class Basi<a href="/tag/ccl/" target="_blank" class="keywords">ccl</a>ient { public static void main(String []args) throws Exception { String url = "http://127.0.0.1:8080/WorkTest/hello"; HessianProxyFactory factory = new HessianProxyFactory(); IBasic basic = (IBasic) factory.create(IBasic.class,url); Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.out.println(basic); Person person = basic.getPerson(); Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.out.println("Hello: " + basic.hello()); Sy<a href="/tag/stem/" target="_blank" class="keywords">stem</a>.out.println("Hello: " + person.toString()); } }

读后感：

1- 整个jar很小,200多K,3.1版本的,当然,我下载的for java的版本.

2- 配置很简单,基本上不需要花什么经历就配置出来了

3- 功能强大,可以将soap抛开,也可以把EJB抛开,采用二进制来传递对象

4- 拥有多种语言支持,python c++  .net 甚至 flex 都可以做为client端