Hessian探究（一）Hessian入门示例

2024-04-01 16:49:30

一、hessian的maven信息：

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<dependency>
<groupId>com.caucho</groupId>
<artifactId>hessian</artifactId>
<version>4.0.38</version>
</dependency>

二、入门示例，以web方式提供对外接口

（1）服务接口：

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package com.tianjunwei.hessian.server;
public interface HelloService {
public String helloWorld(String message);
}

（2）接口实现：

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package com.tianjunwei.hessian.server;
public class HelloServiceImpl implements HelloService{
@Override
public String helloWorld(String message) {
return "hello," + message;
}
}

（3）web.xml的配置：

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<web-app>
<servlet>
<servlet-name>hessian-service</servlet-name>
<servlet-class>
com.caucho.hessian.server.HessianServlet
</servlet-class>
<init-param>
<param-name>home-class</param-name>
<param-value>
com.tianjunwei.hessian.server.HelloServiceImpl
</param-value>
</init-param>
<init-param>
<param-name>home-api</param-name>
<param-value>com.tianjunwei.hessian.server.HelloService</param-value>
</init-param>
</servlet>
<servlet-mapping>
<servlet-name>hessian-service</servlet-name>
<url-pattern>/hessian</url-pattern>
</servlet-mapping>
</web-app>

（4）客户端调用：

第（3）步中，通过配置servlet，这样就可以通过发布的http进行访问，根据Hessian提供的机制，这样就可以通过url进行服务调用。

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package com.tianjunwei.hessian.client;
import java.net.MalformedURLException;
import com.caucho.hessian.client.HessianProxyFactory;
import com.tianjunwei.hessian.server.HelloService;
public class HelloServiceMain {
public static void main(String [] args) throws MalformedURLException{
String url = "http://localhost:8080/hessian";
System.out.println(url);
HessianProxyFactory factory = new HessianProxyFactory();
HelloService helloService = (HelloService) factory.create(HelloService.class, url);
System.out.println(helloService.helloWorld("jimmy"));
}
}

运行结果：

http://localhost:8080/hessian

hello,jimmy

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