Hession入门

Hession 入门
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
1.package study.hessian;
2.
3.public interface IBasic {
4.
5.public String hello();
6.
7.public Person getPerson();
8.
9.}
一个接口的实现类
1.package study.hessian;
2.
3.public class BasicService implements IBasic {
4.private String hello= "Hello, Vincent";
5.
6.public String hello()
7. {
8.return hello;
9. }
10.
11.public Person getPerson() {
12. Person person = new Person();
13. person.setColor("Yello");
14. person.setLength("176cm");
15. person.setName("vincent");
16.return person;
17. }
18.}
定义一个实体，必须实现序列化接口，因为要通过网络传输
1.package study.hessian;
2.
3.import java.io.Serializable;
4.
5.public class Person implements Serializable{
6.
7.private static final long serialVersionUID = 3276641446246664L;
8.private String name;
9.private String length;
10.private String color;
11.
12.public String getName() {
13.return name;
14. }
15.
16.public void setName(String name) {
= name;
18. }
19.
20.public String getLength() {
21.return length;
22. }
23.
24.public void setLength(String length) {
25.this.length = length;
26. }
27.
28.public String getColor() {
29.return color;
30. }
31.
32.public void setColor(String color) {
33.this.color = color;
34. }
35.
36.}
web.xml文件
1.<?xml version="1.0" encoding="UTF-8"?>
2.<web-app version="2.5" xmlns="/xml/ns/javaee"
3. xmlns:xsi="/2001/XMLSchema-instance"
4. xsi:schemaLocation="/xml/ns/javaee
5. /xml/ns/javaee/web-app_2_5.xsd">
6. <welcome-file-list>
7. <welcome-file>index.jsp</welcome-file>
8. </welcome-file-list>
9. <servlet>
10. <servlet-name>hello</servlet-name>
11. <servlet-class>
12. com.caucho.hessian.server.HessianServlet
13. </servlet-class>
14. <init-param>
15. <param-name>home-class</param-name>
16. <param-value>study.hessian.BasicService</param-value>
17. </init-param>
18. <init-param>
19. <param-name>home-api</param-name>
20. <param-value>study.hessian.IBasic</param-value>
21. </init-param>
22. </servlet>
23.
24. <servlet-mapping>
25. <servlet-name>hello</servlet-name>
26. <url-pattern>/hello</url-pattern>
27. </servlet-mapping>
28.</web-app>
客户端的类（JAVA）
1.package study.hessian;
2.
3.import com.caucho.hessian.client.HessianProxyFactory;
4.
5.public class BasicClient {
6.public static void main(String []args)
7.throws Exception
8. {
9. String url = "http://127.0.0.1:8080/WorkTest/hello";
10. HessianProxyFactory factory = new HessianProxyFactory();
11. IBasic basic = (IBasic) factory.create(IBasic.class, url);
12. System.out.println(basic);
13. Person person = basic.getPerson();
14. System.out.println("Hello: " + basic.hello());
15. System.out.println("Hello: " + person.toString());
16. }
17.}
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。