spring mvc: 生成RSS源

spring mvc: 生成RSS源

准备：

从相同的maven存储库页面下载 Rome 库及其依赖项rome-utils，jdom和slf4j。和所需的依赖关系

<!-- rss源依赖 -->
	<!-- https://mvnrepository.com/artifact/com.rometools/rome -->
	<dependency>
	    <groupId>com.rometools</groupId>
	    <artifactId>rome</artifactId>
	    <version>1.8.0</version>
	</dependency>
	<!-- https://mvnrepository.com/artifact/com.rometools/rome-utils -->
	<dependency>
	    <groupId>com.rometools</groupId>
	    <artifactId>rome-utils</artifactId>
	    <version>1.8.0</version>
	</dependency>
	<!-- https://mvnrepository.com/artifact/org.jdom/jdom -->
	<dependency>
	    <groupId>org.jdom</groupId>
	    <artifactId>jdom</artifactId>
	    <version>2.0.2</version>
	</dependency>
	<!-- https://mvnrepository.com/artifact/org.slf4j/slf4j-api -->
	<dependency>
	    <groupId>org.slf4j</groupId>
	    <artifactId>slf4j-api</artifactId>
	    <version>1.7.7</version>
	</dependency>

　　

访问地址：

http://localhost:8080/gugua3/rss/getrss

项目： gugua3

包：springweb

配置文件：web.xml, applicationContext.xml, springweb-servlet.xml

web.xml

<web-app>
  <display-name>Archetype Created Web Application</display-name>

<!--配置文件路径-->
<context-param>
 	<param-name>contextConfigLocation</param-name>
	<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>

<!-- 字符过滤器 -->
<filter>
   <filter-name>encodingFilter</filter-name>
   <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
   <init-param>
       <param-name>encoding</param-name>
       <param-value>UTF-8</param-value>
   </init-param>
</filter>
<filter-mapping>
    <filter-name>encodingFilter</filter-name>
    <url-pattern>/*</url-pattern>
</filter-mapping> 

<!-- 监听转发 -->
<listener>
	<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<servlet>
    <servlet-name>springweb</servlet-name>
    <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
    <load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
    <servlet-name>springweb</servlet-name>
    <url-pattern>/</url-pattern>
</servlet-mapping>    

</web-app>

　　

applicationContext.xml

<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/beans
					http://www.springframework.org/schema/beans/spring-beans.xsd
					http://www.springframework.org/schema/mvc
					http://www.springframework.org/schema/mvc/spring-mvc.xsd
					http://www.springframework.org/schema/context
					http://www.springframework.org/schema/context/spring-context.xsd">

<!-- 默认：注解映射支持 -->
<mvc:annotation-driven/>
<!-- 静态资源配置 -->
<mvc:resources location="/pages/**" mapping="/pages/"/>

<!-- 自动扫描包名,controller -->
<context:component-scan base-package="springweb"/>		

</beans>

　　

springweb-servlet.xml

将RSSFeedViewer.java作为视图文件

<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/beans
					http://www.springframework.org/schema/beans/spring-beans.xsd
					http://www.springframework.org/schema/mvc
					http://www.springframework.org/schema/mvc/spring-mvc.xsd
					http://www.springframework.org/schema/context
					http://www.springframework.org/schema/context/spring-context.xsd">

<bean class="org.springframework.web.servlet.view.BeanNameViewResolver"/>
<bean id="rssViewer" class="springweb.RSSFeedViewer"/>

</beans>

　　

RSSMessage.java

package springweb;

import java.util.Date;

public class RSSMessage {

	String title;
	String url;
	String summary;
	Date createDate;

	public String getTitle() {
		return title;
	}

	public void setTitle(String title) {
		this.title = title;
	}

	public String getUrl() {
		return url;
	}

	public void setUrl(String url) {
		this.url = url;
	}

	public String getSummary() {
		return summary;
	}

	public void setSummary(String summary) {
		this.summary = summary;
	}

	public Date getCreateDate() {
		return createDate;
	}

	public void setCreateDate(Date createDate) {
		this.createDate = createDate;
	}

}

　　

//视图模板（相当于jsp）

RSSFeedViewer.java

获取RSSController传过来的值：

List<RSSMessage> listContent = (List<RSSMessage>) model.get("feedContent");

package springweb;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.springframework.web.servlet.view.feed.AbstractRssFeedView;

import com.rometools.rome.feed.rss.Channel;
import com.rometools.rome.feed.rss.Content;
import com.rometools.rome.feed.rss.Item;

public class RSSFeedViewer extends AbstractRssFeedView {

	//xml说明
	protected void buildFeedMetadata(Map<String, Object> model, Channel feed, HttpServletRequest request)
	{
		feed.setTitle("YiibaiPoint Dot com");
		feed.setDescription("java Yiibai and Examples");
		feed.setLink("http://www.yiibai.com");
		super.buildFeedMetadata(model, feed, request);
	}

	@Override
	protected List<Item> buildFeedItems(Map<String, Object> model, HttpServletRequest request,
			HttpServletResponse response) throws Exception {
		// TODO Auto-generated method stub
		List<RSSMessage> listContent = (List<RSSMessage>) model.get("feedContent");
		List<Item> items = new ArrayList<Item>(listContent.size());
		for(RSSMessage tempContent: listContent)
		{
			Item item = new Item();
			Content content = new Content();
			content.setValue(tempContent.getSummary());
			item.setContent(content);

			item.setTitle(tempContent.getTitle());
			item.setLink(tempContent.getUrl());
			item.setPubDate(tempContent.getCreateDate());
			items.add(item);

		}
		return items;
	}

}

　　

RSSController.java

package springweb;

import java.util.ArrayList;
import java.util.Date;
import java.util.List;

import  org.springframework.stereotype.Controller;
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

@Controller
public class RSSController {

	@RequestMapping(value="/rss/getrss", method=RequestMethod.GET)
	public ModelAndView getFeedInRss()
	{

		List<RSSMessage> items = new ArrayList<RSSMessage>();
		RSSMessage content = new RSSMessage();

		content.setTitle("spring教程");
		content.setUrl("http://www.baidu.com");
		content.setSummary("你好教程教程.....");
		content.setCreateDate(new Date());
		items.add(content);

		RSSMessage content2 = new RSSMessage();
		content2.setTitle("spring mvc教程");
		content2.setUrl("http://www.sina.com.cn");
		content2.setSummary("spring mvc教程教程....");
		content2.setCreateDate(new  Date());
		items.add(content2);

		ModelAndView mv = new ModelAndView();
		mv.setViewName("rssViewer");
		mv.addObject("feedContent", items);

		return mv;

	}

}