hessian使用记录

hessian还是挺简单的，简单记录一下。注意hessian要使用官方下载的最新版本,不要用mvn仓库的，那是6年前的库了，呵呵。

pom.xml

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>com.duitang</groupId>
  <artifactId>t3</artifactId>
  <version>0.0.1-SNAPSHOT</version>
  <packaging>war</packaging>
  <properties>
  		  <org.springframework.version>3.1.2.RELEASE</org.springframework.version>
  </properties>
  <dependencies>
  		 <dependency>
		 	<groupId>javax.servlet</groupId>
		 	 <artifactId>servlet-api</artifactId>
		 	 <version>2.5</version>
		 </dependency>	
  	     <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-web</artifactId>
            <version>${org.springframework.version}</version>
        </dependency>
        <dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-webmvc</artifactId>
            <version>${org.springframework.version}</version>
        </dependency>
  		<dependency>
            <groupId>org.springframework</groupId>
            <artifactId>spring-core</artifactId>
            <version>${org.springframework.version}</version>
        </dependency>
	  	<dependency>
		  <groupId>com.duitang.external</groupId>
		  <artifactId>hessian</artifactId>
		  <version>4.0.7</version>
		</dependency>
  </dependencies>
</project>

接口定义和实现：

public interface BasicAPI {
	public String hello();
}

package test;

public class BasicService implements BasicAPI{

	public String hello() {
		return "Hello, world";
	}

}

webx.xml配置servlet:

<?xml version="1.0" encoding="UTF-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
    <display-name>duitang.com</display-name>
    <servlet>
		<servlet-name>Hello</servlet-name>
		<servlet-class>com.caucho.hessian.server.HessianServlet</servlet-class>
		<init-param>
			<param-name>home-api</param-name>
			<param-value>test.BasicAPI</param-value>
		</init-param>
		<init-param>
			<param-name>home-class</param-name>
			<param-value>test.BasicService</param-value>
		</init-param>
		<load-on-startup>1</load-on-startup>
	</servlet>
	
	<servlet-mapping>
		<servlet-name>Hello</servlet-name>
		<url-pattern>/Hello</url-pattern>
	</servlet-mapping> 
</web-app>

客户端调用

package test;

import java.net.MalformedURLException;

import com.caucho.hessian.client.HessianProxyFactory;


public class Test{

	public static void main(String[] args) throws MalformedURLException{
        String url="http://localhost:8080/Hello";
        HessianProxyFactory proxyFactory=new HessianProxyFactory();
        BasicAPI basicAPI = (BasicAPI) proxyFactory.create(BasicAPI.class, url);
        System.out.println(basicAPI.hello());

	}
	
}

python客户端更简单

if __name__ == "__main__":

    proxy = Hessian("http://localhost:8080/Hello")

    try:
        print proxy.hello()
    except Error, v:
        print "ERROR", v

Hello, world

hessian协议:
http://hessian.caucho.com/doc/hessian-serialization.html