restlet借助servlet部署到Tomcat

restlet借助servlet部署到Tomcat

本文描述利用通过 org.restlet.ext.servlet.ServerServlet ，实现到Tomcat环境的部署。有两种实现方式，分别如下：

所需jar包：org.restlet.ext.servlet .jar、org.restlet.jar

1、用 Application实现

  项目结构如下：

 

1）、创建两个继承 ServerResource的类

FirstServerResource.java：

package test;

import org.restlet.resource.Get;
import org.restlet.resource.ServerResource;
 
//定义一个资源
public class FirstServerResource extends ServerResource {
     
    @Get
    public String toString() {
        return "Hello World  !";
    }
     
}

SecondServerResource.java：

package test;

import org.restlet.resource.Get;
import org.restlet.resource.ServerResource;
 
//定义一个资源
public class SecondServerResource extends ServerResource {
  
    @Get
    public String toString() {
        return "two***!";
    }
     
}

2）、创建一个继承 Application 的类(ServerApplication.java)：

ServerApplication.java:

package test;

import org.restlet.Application;
import org.restlet.Restlet;
import org.restlet.routing.Router;
 //为资源配置路径
public class ServerApplication extends Application {
    
    @Override
    public Restlet createInboundRoot() {
        Router router = new Router(this.getContext());
        //绑定资源路径到对应的处理资源类
        router.attach("/first", FirstServerResource.class);
        router.attach("/second", SecondServerResource.class);
        return router;
    }
     
}

3）、修改web.xmlview plain

<?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">
  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
  
  <context-param>
	    <param-name>org.restlet.application</param-name>
		 <!--  自定义org.restlet.Application扩展类  -->
		<param-value>test.ServerApplication</param-value>
		
	</context-param>
	
	<servlet>
		<servlet-name>RestletServlet</servlet-name>
		<servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>RestletServlet</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>
</web-app>

4）、启动Tomcat，分别通过http://localhost:8182/testRestLet01-2/first、http://localhost:8182/testRestLet01-2/second访问。

2、用Component实现 

  项目结构如下：

1）、创建两个继承 ServerResource的类(FirstServerResource.java、SecondServerResource.java)：方法同上

2）、创建两个继承 Application 的类(FirstServerApplication.java、SecondServerApplication.java)：

     FirstServerApplication.java：

package application;

import org.restlet.Application;
import org.restlet.Restlet;
import org.restlet.routing.Router;

import resource.FirstServerResource;
 //为资源配置路径
public class FirstServerApplication extends Application {
   
    @Override
    public Restlet createInboundRoot() {
        Router router = new Router(this.getContext());
      //绑定资源路径到对应的处理资源类
        router.attach("/one", FirstServerResource.class);
        return router;
    }
     
}

SecondServerApplication.java：

package application;

import org.restlet.Application;
import org.restlet.Restlet;
import org.restlet.routing.Router;

import resource.SecondServerResource;
 //为资源配置路径
public class SecondServerApplication extends Application {
   
    @Override
    public Restlet createInboundRoot() {
        Router router = new Router(this.getContext());
      //绑定资源路径到对应的处理资源类
        router.attach("/two", SecondServerResource.class);
        return router;
    }
     
}

3）、创建一个继承 Component 的类(MyComponent.java)：

MyComponent.java：

package component;

import org.restlet.Component;

import application.FirstServerApplication;
import application.SecondServerApplication;

public class MyComponent extends Component{
	
	/**
	 * 重写createInboundRoot通过attach方法绑定资源类，并且制定了访问路径
	 * */
	public MyComponent(){
		getDefaultHost().attach("/first", new FirstServerApplication());
		getDefaultHost().attach("/second", new SecondServerApplication());
	}
}

4）、配置 web.xml

<?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">
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>

	<context-param>
		<param-name>org.restlet.component</param-name>
		<param-value>component.MyComponent</param-value>
	</context-param>
	
	<servlet>
		<servlet-name>RestletServlet</servlet-name>
		<servlet-class>org.restlet.ext.servlet.ServerServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>RestletServlet</servlet-name>
		<url-pattern>/*</url-pattern>
	</servlet-mapping>
	
</web-app>

5）、部署后，通过 localhost:8182/testRestLet01-2/first/one 和 localhost:8182/testRestLet01-2/Second/two访问。

注：在restlet中一个component可以对应多个application，一个application可以对应多个resource