maven + hessian 简单例子

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项目结构如下：

pom.xml 内容：

<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/maven-v4_0_0.xsd"><modelVersion>4.0.0</modelVersion><groupId>com.lala</groupId><artifactId>hessian-web</artifactId><packaging>war</packaging><version>1.0.0</version><name>hessian-web Maven Webapp</name><url>http://maven.apache.org</url><dependencies><dependency><groupId>junit</groupId><artifactId>junit</artifactId><version>4.10</version><scope>test</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>jsp-api</artifactId><version>2.0</version><scope>provided</scope></dependency><dependency><groupId>javax.servlet</groupId><artifactId>javax.servlet-api</artifactId><version>3.0.1</version><scope>provided</scope></dependency><dependency><groupId>com.caucho</groupId><artifactId>hessian</artifactId><version>4.0.38</version></dependency></dependencies><build><finalName>hessian-web</finalName><plugins><plugin><groupId>org.apache.maven.plugins</groupId><artifactId>maven-compiler-plugin</artifactId><version>3.3</version><configuration><source>1.8</source><target>1.8</target><verbose>true</verbose></configuration></plugin><plugin><groupId>org.eclipse.jetty</groupId><artifactId>jetty-maven-plugin</artifactId><version>9.2.11.v20150529</version><configuration><stopKey>foo</stopKey><stopPort>9999</stopPort><httpConnector><port>3389</port></httpConnector><webApp><contextPath>/</contextPath></webApp></configuration></plugin></plugins></build></project>

package com.lala.service;import java.util.Map;public interface UserService {public Map<String, Object> getById(long id);public String get();}

package com.lala.service;import java.util.HashMap;import java.util.Map;public class UserServiceImpl implements UserService{public String get(){return "get method invoke";}public Map<String, Object> getById(long id) {if(id <= 0){return null;}Map<String, Object> result = new HashMap<>();result.put("id", id);result.put("name", "英布");result.put("position", "九江王");return result;}}

servlet如下：

package com.lala.servlet;import java.io.IOException;import javax.servlet.ServletException;import javax.servlet.annotation.WebInitParam;import javax.servlet.annotation.WebServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import com.caucho.hessian.server.HessianServlet;@WebServlet(value = "/hessian/user", initParams={@WebInitParam(name="service-class",value="com.lala.service.UserServiceImpl")})public class UserHessianServlet extends HessianServlet{private static final long serialVersionUID = 1L;public void init() throws ServletException {super.init();}protected void service(HttpServletRequest req, HttpServletResponse resp)throws ServletException, IOException{super.service(req, resp);}}

然后，启动jetty服务

mvn jetty:run

调用代码

package com.client;import com.caucho.hessian.client.HessianProxyFactory;import com.lala.service.UserService;public class App {public static void main(String[] args)throws Exception{HessianProxyFactory factory = new HessianProxyFactory();  String url = "http://127.0.0.1:3389/hessian/user";UserService us = (UserService)factory.create(UserService.class,url);  System.out.println(us.getById(2l));System.out.println(us.get());}}

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