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项目中要实现导出文件的功能，点导出按钮时让它弹出来一个窗口，选择存储目录和文件名

实现如下：

servlet方式

弹出来的是文件下载窗口

html代码:

<%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%>              	
   	
   	
       	
   	
   	
             
   
	
    
	
   
  

package com.test;import java.io.IOException;import java.io.OutputStream;import javax.servlet.ServletContext;import javax.servlet.ServletException;import javax.servlet.http.HttpServlet;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.xhtmlrenderer.pdf.ITextFontResolver;import org.xhtmlrenderer.pdf.ITextRenderer;import com.lowagie.text.pdf.BaseFont;public class Html2PdfServlet extends HttpServlet {	private static final long serialVersionUID = 1L;	public void doGet(HttpServletRequest request, HttpServletResponse response)		throws ServletException, IOException {		//pageContext.getServletContext().getRealPath("/")		ServletContext sc = request.getSession().getServletContext();		String path = sc.getRealPath(""); //值为D:\apache-tomcat-6.0.26\webapps\createpdf		System.out.println("原path: " + path);		//把路径中的反斜杠转成正斜杠		path = path.replaceAll("\\\\", "/"); //值为D:/apache-tomcat-6.0.26/webapps/createpdf		System.out.println(path);				String path2 = sc.getRealPath("/");		System.out.println("path2: " + path2);				System.out.println(Thread.currentThread().getContextClassLoader().getResource(""));				System.out.println("request.getRequestURI: " + request.getRequestURI());		//获取使用的端口号		System.out.println(request.getLocalPort());				String path3 = request.getContextPath();		String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path3+"/";				System.out.println("basepath: " + basePath);						response.setContentType("application/pdf");		//response.setHeader("Content-Disposition", "attachment; filename=WebReport.pdf");		response.setHeader("Content-Disposition", "inline; filename=WebReport.pdf");        		StringBuffer html = new StringBuffer();		//组装成符合W3C标准的html文件，否则不能正确解析		html.append("");		html.append("")		.append("")		.append("
   ")		.append("")		.append("")		.append("")		.append("");				html.append("
   
    
统计报表
   ");		html.append("
   
    ");		html.append("
    ");		html.append("
   ");				html.append("");                // parse our markup into an xml Document        try {        	ITextRenderer renderer = new ITextRenderer();        	/**        	 * 引入了新的jar包，不用再导入字体了        	ITextFontResolver fontResolver = renderer.getFontResolver();        	fontResolver.addFont("C:/Windows/fonts/simsun.ttc",        			BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);        	*/            renderer.setDocumentFromString(html.toString());            // 解决图片的相对路径问题    		//renderer.getSharedContext().setBaseURL("file:/C:/Documents and Settings/dashan.yin/workspace/createpdf/WebRoot/images");            //renderer.getSharedContext().setBaseURL("file:/D:/apache-tomcat-6.0.26/webapps/createpdf/images");    		renderer.getSharedContext().setBaseURL("file:/" + path + "/images");    		renderer.layout();            OutputStream os = response.getOutputStream();            renderer.createPDF(os);            os.close();        } catch (Exception e) {            e.printStackTrace();        }	}	public void doPost(HttpServletRequest request, HttpServletResponse response)			throws ServletException, IOException {		doGet(request, response);	}}

弹出来的是另存为窗口

html代码：

<%@ page language="java" contentType="text/html; charset=GB18030"    pageEncoding="GB18030"%>
   	
用户登录
	
   
	
   
    		用户：
    
    
		密码：
    
    
		
    	
   
		
   
	
    
	
   
	

package com.bjsxt.struts;import java.io.File;import java.io.FileInputStream;import java.io.OutputStream;import java.io.PrintWriter;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;import org.apache.struts.action.ActionForm;import org.apache.struts.action.ActionForward;import org.apache.struts.action.ActionMapping;import org.apache.struts.actions.DispatchAction;public class ResponseAction extends DispatchAction {		/**	 * 要想实现另存为下载必须满足的条件：	 * 1.导入jar包：commons-fileupload.jar	 * 2.发送请求必须以一个form表单的形式，且提交的时候必须是type="submit"(这一条也不对，也以可是type="button"),	 * form的action值为相应的Action,后面不能跟方法名，跟一个form属性method="post",即：	 * 
   
			
    
		
   
		3.相应的Action中方法名为execute，即：(这一条不对，这跟struts配置有关)		public ActionForward execute(ActionMapping mapping, ActionForm form,			HttpServletRequest request, HttpServletResponse response)	 *	 * 现在最新总结出来：只需要满足两个条件：	 * 导入jar包:commons-fileupload.jar	 * 以表单提交	 *	 */	public ActionForward execute(ActionMapping mapping, ActionForm form,			HttpServletRequest request, HttpServletResponse response) {		StringBuffer buffer = new StringBuffer("你好");				String pdfPathName = "C:/Documents and Settings/dashan.yin/workspace/webmonitor_4/WebRoot/pdf/test.pdf";		try {			OutputStream out = response.getOutputStream();			byte by[] = new byte[1024];			File fileLoad = new File(pdfPathName);			response.reset();			response.setContentType("application/pdf");			response.setHeader("Content-Disposition",			"attachment; filename=WebReport.pdf");			long fileLength = fileLoad.length();			String length1 = String.valueOf(fileLength);			response.setHeader("Content_Length", length1);			FileInputStream in = new FileInputStream(fileLoad);			int n;			while ((n = in.read(by)) != -1) {				out.write(by, 0, n);			}			in.close();			out.flush();		} catch (Exception e) {			e.printStackTrace();		}		return null;	}}

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