java web页面静态化使用httpclient生成静态页面

    package com.wwxl.util;   

    import java.io.*;   

    import org.apache.commons.httpclient.*;   
    import org.apache.commons.httpclient.methods.*;   
    import org.apache.commons.httpclient.params.HttpMethodParams;   
    import org.apache.log4j.Logger;  

    /** 
     * 静态页面引擎技术 
     * @author 邓文伟 
     * 
     */   
    public class HtmlGenerator{   
        private Logger logger = Logger.getLogger(HtmlGenerator.class);  
        HttpClient httpClient = null; //HttpClient实例    
        GetMethod getMethod =null; //GetMethod实例    
        String page = null;  
        String webappname = null;  
        BufferedWriter fw = null;    
        BufferedReader br = null;   
        InputStream in = null;   
        StringBuffer sb = null;   
        String line = null;     
        //构造方法  
            public HtmlGenerator(String webappname){  
             this.webappname = webappname;  
   
            }  
             /** 根据模版及参数产生静态页面 */   
            public  boolean createHtmlPage(String url,String htmlFileName){   
            boolean status = false;    
            int statusCode = 0;                
            try{   
        //创建一个HttpClient实例充当模拟浏览器    
        httpClient = new HttpClient();   
        //设置httpclient读取内容时使用的字符集    
        httpClient.getParams().setParameter(HttpMethodParams.HTTP_CONTENT_CHARSET,"UTF-8");            
        //创建GET方法的实例    
        getMethod = new GetMethod(url);   
        //使用系统提供的默认的恢复策略，在发生异常时候将自动重试3次    
        getMethod.getParams().setParameter(HttpMethodParams.RETRY_HANDLER, new DefaultHttpMethodRetryHandler());   
        //设置Get方法提交参数时使用的字符集,以支持中文参数的正常传递    
        getMethod.addRequestHeader("Content-Type","text/html;charset=UTF-8");   
        //执行Get方法并取得返回状态码，200表示正常，其它代码为异常    
        statusCode = httpClient.executeMethod(getMethod);              
        if (statusCode!=200) {   
            logger.fatal("静态页面引擎在解析"+url+"产生静态页面"+htmlFileName+"时出错!");   
        }else{   
            //读取解析结果    
            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();  
            //将页面中的相对路径替换成绝对路径，以确保页面资源正常访问  
            page = formatPage(page);  
            //将解析结果写入指定的静态HTML文件中，实现静态HTML生成    
            writeHtml(htmlFileName,page);   
            status = true;   
        }              
    }catch(Exception ex){   
        logger.fatal("静态页面引擎在解析"+url+"产生静态页面"+htmlFileName+"时出错:"+ex.getMessage());            
    }finally{   
        //释放http连接    
        getMethod.releaseConnection();   
    }   
    return status;   
}   
   
//将解析结果写入指定的静态HTML文件中    
private synchronized void writeHtml(String htmlFileName,String page) throws Exception{    
    fw = new BufferedWriter(new FileWriter(htmlFileName));   
    OutputStreamWriter fw = new OutputStreamWriter(new FileOutputStream(htmlFileName),"UTF-8");   
    fw.write(page);    
    if(fw!=null)fw.close();        
}   
      //将页面中的相对路径替换成绝对路径，以确保页面资源正常访问  
        private String formatPage(String page){    
         page = page.replaceAll("\\.\\./\\.\\./\\.\\./", webappname+"/");  
         page = page.replaceAll("\\.\\./\\.\\./", webappname+"/");  
         page = page.replaceAll("\\.\\./", webappname+"/");     
         return page;  
        }  
      //测试方法    
        public static void main(String[] args){   
            HtmlGenerator h = new HtmlGenerator("webappname");   
    h.createHtmlPage("http://www.baidu.com","c:/a.html");   
    System.out.println("静态页面已经生成到c:/a.html");   
       
}   

}

[html] view plaincopy

添加pom依赖
<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>

<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>