利用HtmlClient生成靜態頁面

 直接上代碼

 

發佈新聞方法：

 

@Action(value = "publisNews", results = {
			@Result(name = "toBrowseNews", type = "redirectAction", location = "newsQuery") })
	/** 發佈指定新聞 */
	public String publisNews() throws Exception{
		if (model.getId()!=null){
			News tempNews = newsService.getNewsById(model.getId());
			if (tempNews!=null){
				HttpServletRequest request = ServletActionContext.getRequest();
				String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+request.getContextPath();				
				String url=basePath+"/news/viewNews.action?id="+tempNews.getId();
				//創建靜態頁面生成器實例
				HtmlGenerator hg = new HtmlGenerator(basePath);
				//發佈成靜態頁面
				if (hg.createHtmlPage(url, request.getRealPath(tempNews.getHtmlPath()))){
					actionMsg = getText("news_publish_succ");
					//將該新聞標記成"已發佈"
					tempNews.setStatus(Dictionary.NEWS_STATUS_YES);					
				}else{
					actionMsg = getText("news_publish_fail");
					//將該新聞標記成"未發佈"
					tempNews.setStatus(Dictionary.NEWS_STATUS_NO);
				}
				newsService.updateNews(tempNews);	//調用業務邏輯組件更新指定的新聞					
			}		
		}
		return "toBrowseNews";		
	}	

  

 

 HtmlGenerator類：

 

package com.west2.common.util.htmlClient;


import java.io.*;
import org.apache.commons.httpclient.*;
import org.apache.commons.httpclient.methods.*;
import org.apache.commons.httpclient.params.HttpMethodParams;

/** 靜態頁面引擎 */
public class HtmlGenerator extends BaseLog {
	HttpClient httpClient = null; //HttpClient實例
	GetMethod getMethod =null; //GetMethod實例
	BufferedWriter fw = null;
	String page = null;
	String webappname = null;
	BufferedReader br = null;
	InputStream in = null;
	StringBuffer sb = null;
	String line = null;
	
	//構造方法
	public HtmlGenerator(String webappname){
		this.webappname = webappname;
		
	}
	
	/** 根據模版及參數產生靜態頁面 */
	public boolean createHtmlPage(String url,String htmlFileName){
		boolean status = false;	
		int statusCode = 0;				
		try{
			//創建一個HttpClient實例充當模擬瀏覽器
			httpClient = new HttpClient();
			//設置httpclient讀取內容時使用的字符集
			httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"UTF-8");			
			//創建GET方法的實例
			getMethod = new GetMethod(url);
			//使用系統提供的默認的恢復策略，在發生異常時候將自動重試3次
			getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());
			//設置Get方法提交參數時使用的字符集,以支持中文參數的正常傳遞
			getMethod.addRequestHeader("Content-Type","text/html;charset=UTF-8");
			//執行Get方法並取得返回狀態碼，200表示正常，其它代碼爲異常
			statusCode = httpClient.executeMethod(getMethod);			
			if (statusCode!=200) {
				logger.fatal("靜態頁面引擎在解析"+url+"產生靜態頁面"+htmlFileName+"時出錯!");
			}else{
				//讀取解析結果
				sb = new StringBuffer();
				in = getMethod.getResponseBodyAsStream();
				br = new BufferedReader(new InputStreamReader(in,"UTF-8"));
				while((line=br.readLine())!=null){
					sb.append(line+"\n");
				}
				if(br!=null)br.close();
				page = sb.toString();
				//將頁面中的相對路徑替換成絕對路徑，以確保頁面資源正常訪問
				page = formatPage(page);
				//將解析結果寫入指定的靜態HTML文件中，實現靜態HTML生成
				writeHtml(htmlFileName,page);
				status = true;
			}			
		}catch(Exception ex){
			logger.fatal("靜態頁面引擎在解析"+url+"產生靜態頁面"+htmlFileName+"時出錯:"+ex.getMessage());			
        }finally{
        	//釋放http連接
        	getMethod.releaseConnection();
        }
		return status;
	}
	
	//將解析結果寫入指定的靜態HTML文件中
	private synchronized void writeHtml(String htmlFileName,String content) throws Exception{
		fw = new BufferedWriter(new FileWriter(htmlFileName));
		fw.write(page);	
		if(fw!=null)fw.close();		
	}
	
	//將頁面中的相對路徑替換成絕對路徑，以確保頁面資源正常訪問
	private String formatPage(String page){		
		page = page.replaceAll("\\.\\./\\.\\./\\.\\./", webappname+"/");
		page = page.replaceAll("\\.\\./\\.\\./", webappname+"/");
		page = page.replaceAll("\\.\\./", webappname+"/");			
		return page;
	}
	
	//測試方法
	public static void main(String[] args){
		HtmlGenerator h = new HtmlGenerator("");
		h.createHtmlPage("http://www.qq.com","c:/a.html");
	}

}

 

 

BaseLog:

package com.west2.common.util.htmlClient;

import org.apache.log4j.*;

public class BaseLog {
 /** 取得日誌記錄器Logger */
 public Logger logger = Logger.getLogger(BaseLog.class);
}