maven + hessian 简单例子

心已赠人 2022-08-05 05:12 180阅读 0赞

项目结构如下：

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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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