Hessian服务端和客户端示例
一、服务端
1、创建web项目，建立客户端调用的hessian接口和实现类。
接口：
package com.ymx.hessian.service; import com.ymx.hessian.service.entity.User; public interface UserService { User getUser(String name); }
实现类：
package com.ymx.hessian.service.impl; import com.ymx.hessian.service.UserService; import com.ymx.hessian.service.entity.User; public class UserServiceImpl implements UserService{ @Override public User getUser(String name) { User user = new User(); user.setName(name); user.setAddress("南京"); return user; } }
传输对象，要实现序列化：
package com.ymx.hessian.service.entity; import java.io.Serializable; public class User implements Serializable{ private static final long serialVersionUID = 5084037062770113475L; private String name; private String address; public String getName() { return name; } public void setName(String name) { this.name = name; } public String getAddress() { return address; } public void setAddress(String address) { this.address = address; } @Override public String toString() { return "User [name=" + name + ", address=" + address + "]"; } }
2、配置hessian服务端接口发布的配置文件。
配置web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
<display-name>hessianserver</display-name>
<servlet>
<servlet-name>HessianServlet</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<init-param>
<param-name>contextConfigLocation</param-name>
<param-value>
/WEB-INF/hessian-server.xml
</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>HessianServlet</servlet-name>
<url-pattern>/hessian/service/*</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
</web-app>
配置hessian-server.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:mvc="http://www.springframework.org/schema/mvc" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="userServiceImpl" class="com.ymx.hessian.service.impl.UserServiceImpl" /> <!-- 使用HessianServiceExporter 将普通bean导出成Hessian服务 --> <bean name="/user" class="org.springframework.remoting.caucho.HessianServiceExporter"> <property name="service" ref="userServiceImpl" /> <!-- Hessian服务的接口 --> <property name="serviceInterface" value="com.ymx.hessian.service.UserService" /> </bean> </beans>
二、客户端
调用前把服务端发布接口和实体打成jar包提供给客户端。
1、第一种调用服务端hessian方式
调用的url为：http://ip:port/工程名/web.xml中所配置的url-pattern/hessian-server.xml所配置的bean的name;
package com.ymx.client; import java.io.IOException; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.caucho.hessian.client.HessianProxyFactory; import com.ymx.hessian.service.UserService; public class Test { public static void main(String[] args) throws IOException { first(); } public static void first() throws IOException{ String url = "http://localhost:8080/hessianserver/hessian/service/user"; HessianProxyFactory factory = new HessianProxyFactory(); UserService userService = (UserService) factory.create(UserService.class, url); System.out.println(userService.getUser("jack")); } }
2、第二种调用方式
创建hessian-client.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd"> <bean id="hessianClient" class="org.springframework.remoting.caucho.HessianProxyFactoryBean"> <property name="serviceUrl"> <value>http://localhost:8080/hessianserver/hessian/service/user</value> </property> <property name="serviceInterface"> <value>com.ymx.hessian.service.UserService</value> </property> </bean> </beans>
java代码调用：
package com.ymx.client; import java.io.IOException; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.caucho.hessian.client.HessianProxyFactory; import com.ymx.hessian.service.UserService; public class Test { public static void main(String[] args) throws IOException { second(); } public static void second() throws IOException{ ApplicationContext context = new ClassPathXmlApplicationContext("hessian-client.xml"); UserService userService = (UserService) context.getBean("hessianClient"); System.out.println(userService.getUser("rose")); } }
第三种调用方式
可以使用注解的方式把接口service注入到要调用接口的地方。
package com.ymx.client; import java.io.IOException; import org.springframework.context.ApplicationContext; import org.springframework.context.support.ClassPathXmlApplicationContext; import com.caucho.hessian.client.HessianProxyFactory; import com.ymx.hessian.service.UserService; import org.springframework.beans.factory.annotation.Autowired; public class Test { @Autowired private UserService userService; public static void main(String[] args) throws IOException { third(); } public static void third() throws IOException{ System.out.println(userService.getUser("rose")); } }
