使用Java创建Hessian服务有四个步骤:
1、创建Java接口作为公共API (client和server端 创建一个相同的借口)
2、使用HessianProxyFactory创建一个客户端 (client端)
3、创建服务实现类，继承HessianServlet (server端)
4、在servlet引擎中配置服务。 (server端)
代码示例：
server端：
package com.lin.hessian.service;
public interface Basic {
public String sayHello();
}
package com.lin.hessian.service;
import com.caucho.hessian.server.HessianServlet;
public class LinyService extends HessianServlet implements Basic{
private String message = "wowwowowowowow";
@Override
public String sayHello() {
return message;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd" id="WebApp_ID" version="3.1">
<display-name>HessianWeb</display-name>
<servlet>
<servlet-name>hello</servlet-name>
<servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class>
<init-param>
<param-name>home-class</param-name>
<param-value>com.lin.hessian.service.BasicService</param-value>
</init-param>
<init-param>
<param-name>home-api</param-name>
<param-value>com.lin.hessian.service.Basic</param-value>
</init-param>
</servlet> <servlet-mapping>
<servlet-name>hello</servlet-name>
<url-pattern>/hello</url-pattern>
</servlet-mapping> <servlet>
<servlet-name>liny</servlet-name>
<servlet-class>com.lin.hessian.service.LinyService</servlet-class>
</servlet> <servlet-mapping>
<servlet-name>liny</servlet-name>
<url-pattern>/liny</url-pattern>
</servlet-mapping>
</web-app>
client端：
package com.liny.hessian.service;
public interface Basic {
public String sayHello();
}
package com.lin.hessian.client;
import java.net.MalformedURLException;
import com.caucho.hessian.client.HessianProxyFactory;
import com.liny.hessian.service.Basic;
public class HessianClient {
public static void main(String[] args) throws MalformedURLException{
//String url = "http://localhost:8080/HessianWeb/hello";
String url = "http://localhost:8080/HessianWeb/liny";
HessianProxyFactory factory = new HessianProxyFactory();
Basic basic = (Basic)factory.create(Basic.class, url);
System.out.println(basic.sayHello());
}
}
client端要定义一个同server端一模一样的接口Basic，然后通过HessianProxyFactory获得代理，并调用远程服务的方法。