Hessian的使用介绍

原文：
https://blog.csdn.net/flysun3344/article/details/52929481

一：添加hessian-4.0.7.jar至工程中

image.png

二：服务端发布的服务代码

建立web工程

1.接口Isay

 package fly.sun.demo1;
 
public interface Isay {
    public String sayHello(String arg1,String arg2);
}

2.接口的实现类IsayImpl

package fly.sun.demo1;
 
public class IsayImpl implements Isay {
 
    public String sayHello(String arg1, String arg2) {
        return "Hello:" + arg1 + arg2; 
    }
}

3.在web.xml中配置Hessian的Servlet

<?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">
  <display-name></display-name> 
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
   <servlet>
        <servlet-name>hello</servlet-name>
        <!-- 配置Hessian的Servlet(来源于jar包) -->  
        <servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class>
        <init-param>
           <!-- 固定写为service-class -->
            <param-name>service-class</param-name>
            <param-value>fly.sun.demo1.IsayImpl</param-value>
        </init-param>
   </servlet>
   
   <servlet-mapping>
        <servlet-name>hello</servlet-name>
        <url-pattern>/hello</url-pattern>
   </servlet-mapping>
  
</web-app>

tomcat中启动工程即已经将服务发布了。

三：客户端调用服务端发布的服务

<pre style="box-sizing: border-box; outline: 0px; padding: 8px; margin: 0px 0px 24px; position: relative; white-space: pre-wrap; word-wrap: break-word; overflow-x: auto; font-family: Consolas, Inconsolata, Courier, monospace; font-size: 14px; line-height: 22px; color: rgb(0, 0, 0);">客户端也需要导入</pre>

hessian-4.0.7.jar

客户端代码如下：

import com.caucho.hessian.client.HessianProxyFactory;
 
public class HelloTest {
 
    public static void main(String[] args) throws Exception {
        // Hessian代理工厂
        HessianProxyFactory factory = new HessianProxyFactory();
        // 访问配置的Servlet路径 
        String url = "http://localhost:8080/发布服务的工程名/hello";  
        // 使用Hessian工厂获得接口的具体实现类
        Isay i = (Isay)factory.create(Isay.class, url);
        System.out.println(i.sayHello("fly", "sun"));
    }
 
}

运行结果：

image.png