iText导出pdf，poi导出excel并下载到客户端

不念不忘少年蓝@ 2022-04-15 06:14 283阅读 0赞

项目中需要做导出功能，要支持excel，pdf导出。

excel导出我选择使用poi；pdf导出我选择使用iText，在此单独做记录。

先说说在设计与开发中的问题，从整体上把握设计思路。

思路（一）

在页面json拼装数据，在后台导出pdf文件到客户端。

本例子只是简单的导出列表数据，没有涉及到图片等其他复杂格式文件。所以还是比较简单的。

这个设计思路是最理想的。

在后台获取前台数据，把这些数据直接生成pdf文件流输出到response中去，

不会在服务器留下垃圾文件。在客户端会弹出文件保存框，直接保存到客户端本地。

\-------------------

这个思路很好，但是在导出到客户端时我遇到问题，就是弹不出文件保存框，页面没什么反应。用ajax回调函数

弹出返回数据是一堆乱码。

基于此原因，我改用

思路（二）

把pdf文件生成在服务器下的一个目录下，在ajax回调函数中使用这个拼装成访问路径，

这样可以下载文件。如果浏览器总是弹出阻止下载文件的弹出提示，可以在浏览器工具--internet 选项--

安全--自定义级别--下载，改一下：文件下载：启用；文件下载的自动提示：启用。都是启用就可以了，

这样就不会在弹出了。

这样也有问题，1会在服务器下生成许多垃圾文件，需要维护人员定期的删除，不然硬盘就不够用了。

2在客户端访问生成的文件会是zip文件或者是没有后缀的文件格式，或者直接在浏览器直接打开了。

如果是zip或者是其他格式不被浏览器识别，解决问题的方法就是在web.xml中设置mime类型。

这个就不细说了，网上一大堆。如果直接在浏览器打开pdf文件，那可以在你电脑安装的pdf阅读器设置里

把在浏览器中打开这一项去掉。

这样还是会有问题：

1，web.xml设置的mime类型对整个工程都是有效地，在这里我想让浏览器下载这个类型的文件而不是打开，所以

我设置了mime；而在其他地方就是需要浏览器打开这个类型的文件提供在线阅读，而不是弹出下载的文件选择框。

所以设置mime类型是会发生冲突的。

2，在pdf阅读器设置取消掉“在浏览器打开”这一项不太符合用户习惯，用户使用这个功能还需要设置自己电脑上的其他

软件，这个太不合理了。

这样的问题，我决定改变访问方式，使用下载，而不是直接给文件在服务器的地址直接访问。

思路（三）

可以在服务器路径下生成pdf文件，对于访问方式采用下载方式，下载完成后再删除此文件。

这和思路（一）区别不是很大，之所以采用这种方式，是因为在设置文件类型时，

用代码设置response.setContentType("application/pdf");

response.addHeader("Content-Disposition","attachment;filename="+serfilename.trim());

serfilename是生成的临时pdf文件的名字，随机的，这两行代码必须在调用输入输出流之前，

因为只要一调用流往客户端写文件，就会弹出文件保存框，这两行代码还没走到，所以是无效的。

如果写在调用流之前，这个文件的名字是在调用流之后才生成的文件名。

所以，读写的逻辑自己定。

你的方法如果能封装OutpuStream,那就把response对象也传入你的方法中，并在调用流之前先调用这两行代码。

如果你的方法不能封装OutpuStream，那就先把文件写在服务器下路径，生成文件后，调用这两行代码，

然后自己再写读写文件到response。只要保证在读写流调用前就可以。

所以思路（三）和思路（一）是差不多的。

\------------------

总之，

1，在web.xml中不要设置mime，在程序中能控制的就不要在控制全局的web.xml中设置。

2，文件的访问最好用下载方式，不要直接贴个url做成链接。

3，不要在服务器下生成垃圾文件。临时的文件用过后要删除。最好别生成临时文件。

\-------------------

pdf导出我采用方式（三），生成临时文件，下载后删除。

excel导出我采用方式（一），直接写到客户端。

这是最后的代码，采用servlet方式。

web.xml 注意注释掉的部分

<servlet>
    		<description>ExportExcelServletDescription</description>
    		<display-name>ExportExcelServlet</display-name>
    		<servlet-name>ExportExcelServlet</servlet-name>
    		<servlet-class>org.hd.report.serv.ExportExcelServlet</servlet-class>
    	</servlet>
    	
    	<servlet-mapping>
    		<servlet-name>ExportExcelServlet</servlet-name>
    		<url-pattern>/ExportExcelServlet</url-pattern>
    	</servlet-mapping>
    	
    		<servlet>
    		<description>ExportPdfServletDescription</description>
    		<display-name>ExportPdfServlet</display-name>
    		<servlet-name>ExportPdfServlet</servlet-name>
    		<servlet-class>org.hd.report.serv.ExportPdfServlet</servlet-class>
    	</servlet>
    	
    	<servlet-mapping>
    		<servlet-name>ExportPdfServlet</servlet-name>
    		<url-pattern>/ExportPdfServlet</url-pattern>
    	</servlet-mapping>

pdf

package org.hd.report.serv;
    
    import java.io.BufferedInputStream;
    import java.io.BufferedOutputStream;
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.OutputStream;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.hd.util.ExportExcelUtil;
    import org.hd.util.ExportPdfUtil;
    
    /**
     * Servlet implementation class PdfItextServlet
     */
    public class ExportPdfServlet extends HttpServlet {
    	private static final long serialVersionUID = 1L;
        
        public ExportPdfServlet() {
            super();
        }
    	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		doPost(request,response);
    	}
    	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		downLoadPdfService(request,response);
    	}
    	
    	protected void downLoadPdfService(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		request.setCharacterEncoding("UTF-8");
    		response.setCharacterEncoding("UTF-8");
    //		response.setContentType("text/xml");
    		
    		
    		String thename = request.getParameter("dd") != null ? request.getParameter("dd") : "";
    		String resjson= request.getParameter("resjson") != null ? request.getParameter("resjson").trim() : "";
        	resjson=java.net.URLDecoder.decode(resjson,"UTF-8");
        	System.out.println("resjson from page--"+resjson);
        	
        	String clientFileName="";
        	String pdfonserver=ExportPdfUtil.createPdfWithJson(resjson);
        	
    //    	String pdfonserver= request.getParameter("pdfonserver") != null ? request.getParameter("pdfonserver") : "";
        	pdfonserver=java.net.URLDecoder.decode(pdfonserver,"UTF-8");
        	String serfilename=pdfonserver.substring(pdfonserver.lastIndexOf("/")+1);//xx.pdf
        	
        	//如果是变生成文件，边写入输出流到servlet，客户端会在输出流写入的时候就弹出保存文件框，setContentType，addHeader所以必须在输出流之前调用。
    //		response.setContentType("octets/stream");
    		response.setContentType("application/pdf");
    //		response.setContentType("application/x-msdownload");//对pdf这个也可以
    		
            response.addHeader("Content-Disposition","attachment;filename="+serfilename.trim());
            
            
            String wholeServerPath=ExportPdfUtil.TEMP_PDF_PATH+"\\"+serfilename;
            File fileOnServer=new File(wholeServerPath.trim());
            if(!fileOnServer.exists()){
            	System.out.println("文件未找到。");
            }else{
            	InputStream is=new BufferedInputStream(new FileInputStream(fileOnServer));
            	OutputStream os=new BufferedOutputStream(response.getOutputStream());
            	byte[] buf=new byte[1024];
            	while((is.read(buf))!=-1){
            		os.write(buf);
            		os.flush();
            	}
            	if(os!=null){
            		os.flush();
            		os.close();
            	}
            	if(is!=null){
            		is.close();
            	}
            	if(fileOnServer.exists()){
            		boolean flag=fileOnServer.delete();
            		if(flag){
            			System.out.println(fileOnServer.getPath()+"完成删除。");
            		}
            	}
            }
    		
    	}
    
    }

excel

package org.hd.report.serv;
    
    import java.io.IOException;
    import java.io.OutputStream;
    
    import javax.servlet.ServletException;
    import javax.servlet.http.HttpServlet;
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import org.hd.util.ExportExcelUtil;
    
    /**
     * Servlet implementation class PdfItextServlet
     */
    public class ExportExcelServlet extends HttpServlet {
    	private static final long serialVersionUID = 1L;
        
        public ExportExcelServlet() {
            super();
        }
    	protected void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		doPost(request,response);
    	}
    	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		makeExcelService(request,response);
    	}
    	
    	protected void makeExcelService(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
    		request.setCharacterEncoding("UTF-8");
    		response.setCharacterEncoding("UTF-8");
    		
        	
    		String thename = request.getParameter("dd") != null ? request.getParameter("dd") : "";
        	String resjson= request.getParameter("resjson") != null ? request.getParameter("resjson") : "";
        	resjson=java.net.URLDecoder.decode(resjson,"UTF-8");
        	System.out.println("servlet---resjson--"+resjson);
        	
    
            
    		OutputStream os=response.getOutputStream();
    		
        	String pdfonserver=ExportExcelUtil.exportExcelFromAllStr(resjson, null, os,response);
        	pdfonserver=java.net.URLDecoder.decode(pdfonserver,"UTF-8");
        	String serfilename=pdfonserver.substring(pdfonserver.lastIndexOf("/")+1);//xx.xlsx
            
        	//如果是变生成文件，边写入输出流到servlet，客户端会在输出流写入的时候就弹出保存文件框，setContentType，addHeader所以必须在输出流之前调用。
        	//因为本例输出流已经封装到ExportExcelUtil的方法中，所以就把response传入，在方法内设置。
    //    	response.setContentType( "application/vnd.ms-excel");//2003
    //		response.setContentType("application/ms-excel"); //2003
    //    	response.setContentType( "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");//2007
    		
    //		response.setContentType("octets/stream");//压缩文件
    //    	response.setContentType("application/x-msdownload");//压缩文件
    //    	response.addHeader("Content-Disposition","attachment;filename="+serfilename.trim());
    //    	System.out.println(serfilename+"成功导出到客户端");
    	}
    
    }

核心代码，工具类：

pdf：

/*
     * This class is part of the book "iText in Action - 2nd Edition"
     * written by Bruno Lowagie (ISBN: 9781935182610)
     * For more info, go to: http://itextpdf.com/examples/
     * This example only works with the AGPL version of iText.
     */
    
    package org.hd.util;
    
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.text.SimpleDateFormat;
    import java.util.Date;
    
    import net.sf.json.JSONObject;
    
    import org.hd.util.BlobUtil;
    
    import com.itextpdf.text.BaseColor;
    import com.itextpdf.text.Document;
    import com.itextpdf.text.DocumentException;
    import com.itextpdf.text.Element;
    import com.itextpdf.text.Font;
    import com.itextpdf.text.Paragraph;
    import com.itextpdf.text.Phrase;
    import com.itextpdf.text.Rectangle;
    import com.itextpdf.text.pdf.BaseFont;
    import com.itextpdf.text.pdf.PdfPCell;
    import com.itextpdf.text.pdf.PdfPRow;
    import com.itextpdf.text.pdf.PdfPTable;
    import com.itextpdf.text.pdf.PdfWriter;
    
    public class ExportPdfUtil {
    
        /** The resulting PDF file. */
        public static final String RESULT = "D:/column_widths.pdf";
    	public static String WEBCONTENT_PATH="";
    	public static String BASE_PATH="";
    	public static String TEMP_PDF_PATH="";//临时pdf目录
    	
    	public static String DirTypePdf="pdf";
    	static{
    
    		String clapath=BlobUtil.class.getResource("/").getPath();
    		File claFile=new File(clapath);
    		String basePath=claFile.getParentFile().getParentFile().getPath();
    		ExportPdfUtil.WEBCONTENT_PATH=basePath;
    		ExportPdfUtil.BASE_PATH=basePath+"\\tempExport";
    		ExportPdfUtil.TEMP_PDF_PATH=ExportPdfUtil.BASE_PATH+"\\pdf";
    		File tempBase=new File(ExportPdfUtil.BASE_PATH);
    		if(!tempBase.exists()){
    			tempBase.mkdir();
    		}
    		File tempPdf=new File(ExportPdfUtil.TEMP_PDF_PATH);
    		if(!tempPdf.exists()){
    			tempPdf.mkdir();
    		}
    		
    		/*
    
    		 */
    		System.out.println("--ExportPdfUtil.WEBCONTENT_PATH--"+ExportPdfUtil.WEBCONTENT_PATH);
    		System.out.println("--ExportPdfUtil.BASE_PATH--"+ExportPdfUtil.BASE_PATH);
    		System.out.println("--ExportPdfUtil.TEMP_PDF_PATH--"+ExportPdfUtil.TEMP_PDF_PATH);
    	
    	}
    	//直接使用json创建pdf文件
    	public static String createPdfWithJson(String resjson){
    		String info="";
            JSONObject jo=JSONObject.fromObject(resjson);
    		
        	String title=(String)jo.get("title");
        	String resTableheaders=(String)jo.get("resTableheaders");
        	String resList=(String)jo.get("resList");
        	
        	String[] resTableheadersArr=ExportExcelUtil.getResTableheadersFromAllStr(resTableheaders);
        	String[][] resListArr=ExportExcelUtil.getResListFromAllStr(resList);
        	
        	info=ExportPdfUtil.createPdf(title, resTableheadersArr, resListArr);
        	
        	return info;
    	}
        /**
         * 写文件，创建pdf
         * @param filepath
         * @param document
         * @return
         */
        public static String createPdf(String title,String[] titles,String[][] dataSet){
        	String respath=ExportPdfUtil.TEMP_PDF_PATH;
        	String filename=ExportPdfUtil.getRandomDateStr();
        	Document document = new Document();
        	Rectangle rectangle=new Rectangle(1024,900);
        	document.setPageSize(rectangle);
        	
        	if(document==null||filename==null||filename.trim().equals("")){
        		return "error";
        	}
            try {
            	String abpath1=respath+"\\"+filename.trim()+".pdf";
            	respath="tempExport/pdf/"+filename.trim()+".pdf";;
    			PdfWriter.getInstance(document, new FileOutputStream(abpath1));
    			document.open();
    			//标题设置
    			String titlestr=title==null?"":title;
    //			Phrase phtitle=new Phrase(titlestr,ExportPdfUtil.getChineseFont());
    	        Paragraph phtitle2=new Paragraph(titlestr,ExportPdfUtil.getChineseFont());
    	        phtitle2.setAlignment(Element.ALIGN_CENTER);
    	        
    	        document.add(phtitle2);
    	        
    	        PdfPTable table = ExportPdfUtil.createTable(title,titles, dataSet);
    	        table.setSpacingBefore(15);
    	        table.setSpacingAfter(15);
    	        document.add(table);
    	        
    	        document.close();
    		} catch (FileNotFoundException e) {
    			e.printStackTrace();
    		} catch (DocumentException e) {
    			e.printStackTrace();
    		}
            System.out.println("web路径："+respath);
            return respath;
        }
        
        public static PdfPTable createTable(String title,String[] titles,String[][] dataSet) throws DocumentException {
        	if(titles==null||titles.length==0){
        		return null;
        	}
            PdfPTable table = new PdfPTable(titles.length);
            
            //表的样式设置--对齐 
            table.setWidthPercentage(90);
            table.setHorizontalAlignment(Element.ALIGN_CENTER);
            
            //表头设置
            float[] headerLength=new float[titles.length];
            for(int i=0;i<headerLength.length;i++){
            	String ti=titles[i]==null?"":titles[i];
            	int len=ti.length();
            	headerLength[i]=15*len+20;
            }
            table.setTotalWidth(headerLength);
            table.setLockedWidth(true);
            
            PdfPCell cell;
            //表头
            for(int k=0;k<titles.length;k++){
            	String str=titles[k]==null?"":titles[k];
            	cell = new PdfPCell(new Phrase(str,ExportPdfUtil.getChineseFont()));
            	cell.setHorizontalAlignment(Element.ALIGN_CENTER);
            	cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
            	cell.setNoWrap(true);
                cell.setColspan(1);
                
                BaseColor bc=new BaseColor(95,158,160);
                cell.setBackgroundColor(bc);
                
                table.addCell(cell);
            }
            //表数据
            for(int i=0;i<dataSet.length;i++){
            	String[] row=dataSet[i];
            	if(row==null||row.length==0){
            		continue;
            	}
            	for(int k=0;k<row.length;k++){
                	String str=row[k]==null?"":row[k];
                	cell = new PdfPCell(new Phrase(str,ExportPdfUtil.getChineseFontForTableCellOne()));
                	cell.setHorizontalAlignment(Element.ALIGN_CENTER);
                	cell.setVerticalAlignment(Element.ALIGN_MIDDLE);
                	cell.setNoWrap(true);
                    cell.setColspan(1);
                    table.addCell(cell);
                }
            }
            return table;
        }
        
        public static Font getChineseFont(){
        	BaseFont bf;
        	Font fontChinese=null;
    		try {
    			bf = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
    			fontChinese=new Font(bf,12,Font.NORMAL);
    		} catch (DocumentException e) {
    			e.printStackTrace();
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    		
    		return fontChinese;
        }
        public static Font getChineseFontForTableCellOne(){
        	BaseFont bf;
        	Font fontChinese=null;
    		try {
    			bf = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
    			fontChinese=new Font(bf,10,Font.NORMAL);
    		} catch (DocumentException e) {
    			e.printStackTrace();
    		} catch (IOException e) {
    			e.printStackTrace();
    		}
    		
    		return fontChinese;
        }
        //随机日期字符串
        public static String getRandomDateStr(){
        	String res="";
        	SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");
        	res=sdf.format(new Date());
        	String a=String.valueOf((new Date()).getTime());
        	return res+"pdf".trim()+a;
        }
    
        /**
         * Main method.
         * @param args no arguments needed
         * @throws DocumentException 
         * @throws IOException
         */
        public static void main(String[] args) throws IOException, DocumentException {
        	String title="呼入汇总11";
        	String[] titles=new String[]{"t1表头","t2表头","t3表头","t4表头","t5表头"};
            String[][] dataSet=new String[2][5];
            dataSet[0]=new String[]{"d11数据","d12数据","d13数据","d14数据","d15数据"};
            dataSet[1]=new String[]{"d21数据","d22数据","d23数据","d24数据","d25数据"};
            ExportPdfUtil.createPdf(title,titles,dataSet);
        }
    }

excel:

package org.hd.util;
    
    import net.sf.json.JSONObject;
    import org.apache.poi.xssf.usermodel.*;
    import org.apache.poi.ss.util.CellRangeAddress;
    import org.apache.poi.ss.usermodel.*;
    import org.apache.poi.hssf.usermodel.HSSFWorkbook;
    
    import java.text.SimpleDateFormat;
    import java.util.Date;
    import java.util.Map;
    import java.util.HashMap;
    import java.io.File;
    import java.io.FileNotFoundException;
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    
    import javax.servlet.http.HttpServletResponse;
    
    public class ExportExcelUtil {
    	
    	public static String WEBCONTENT_PATH="";
    	public static String BASE_PATH="";
    	public static String TEMP_EXCEL_PATH="";//临时excel目录
    	public static String TEMP_WORD_PATH="";//临时word目录
    	
    	public static String DirTypeExcel="excel";
    	public static String DirTypeWord="word";
    	static{
    
    		String clapath=BlobUtil.class.getResource("/").getPath();
    		File claFile=new File(clapath);
    		String basePath=claFile.getParentFile().getParentFile().getPath();
    		ExportExcelUtil.WEBCONTENT_PATH=basePath;
    		ExportExcelUtil.BASE_PATH=basePath+"\\tempExport";
    		ExportExcelUtil.TEMP_EXCEL_PATH=ExportExcelUtil.BASE_PATH+"\\excel";
    		ExportExcelUtil.TEMP_WORD_PATH=ExportExcelUtil.BASE_PATH+"\\word";
    		File tempBase=new File(ExportExcelUtil.BASE_PATH);
    		if(!tempBase.exists()){
    			tempBase.mkdir();
    		}
    		File tempExcel=new File(ExportExcelUtil.TEMP_EXCEL_PATH);
    		if(!tempExcel.exists()){
    			tempExcel.mkdir();
    		}
    		File tempWord=new File(ExportExcelUtil.TEMP_WORD_PATH);
    		if(!tempWord.exists()){
    			tempWord.mkdir();
    		}
    		
    		/*
    --ExportExcelUtil.WEBCONTENT_PATH--D:\MyProject\my-workSpace\ROOT\WebContent
    --ExportExcelUtil.BASE_PATH--D:\MyProject\my-workSpace\ROOT\WebContent\tempExport
    --ExportExcelUtil.TEMP_EXCEL_PATH--D:\MyProject\my-workSpace\ROOT\WebContent\tempExport\excel
    --ExportExcelUtil.TEMP_WORD_PATH--D:\MyProject\my-workSpace\ROOT\WebContent\tempExport\word
    --ExportExcelUtil.TEMP_PDF_PATH--D:\MyProject\my-workSpace\ROOT\WebContent\tempExport\pdf
    
    		 */
    		System.out.println("--ExportExcelUtil.WEBCONTENT_PATH--"+ExportExcelUtil.WEBCONTENT_PATH);
    		System.out.println("--ExportExcelUtil.BASE_PATH--"+ExportExcelUtil.BASE_PATH);
    		System.out.println("--ExportExcelUtil.TEMP_EXCEL_PATH--"+ExportExcelUtil.TEMP_EXCEL_PATH);
    		System.out.println("--ExportExcelUtil.TEMP_WORD_PATH--"+ExportExcelUtil.TEMP_WORD_PATH);
    	
    	}
    
    	/*
    	 resjson--{"title":"呼入汇总","resTableheaders":"日期,坐席总数,呼入总数,总失败次数,咨询次数,转移次数 ,总通话时长,平均通话时长,平均振铃次数,平均振铃时长","resList":"2012-10-17,5,36,3,3,0,54.20,1.64,0,0.11|2012-10-18,5,32,5,1,0,47.10,1.81,0,0.12|2012-10-19,5,32,3,2,0,37.45,1.29,0,0.12|2012-10-22,5,54,6,5,0,92.87,1.98,0,0.09|"}
    title--呼入汇总
    resTableheaders--日期,坐席总数,呼入总数,总失败次数,咨询次数,转移次数 ,总通话时长,平均通话时长,平均振铃次数,平均振铃时长
    resList--2012-10-17,5,36,3,3,0,54.20,1.64,0,0.11|2012-10-18,5,32,5,1,0,47.10,1.81,0,0.12|2012-10-19,5,32,3,2,0,37.45,1.29,0,0.12|2012-10-22,5,54,6,5,0,92.87,1.98,0,0.09|
    	 
    	 *
    	resjson--{"title":"呼入汇总","resTableheaders":"日期,坐席总数,呼入总数,总失败次数,咨询次数,转移次数 ,总通话时长,平均通话时长,平均振铃次数,平均振铃时长","resList":""}
    title--呼入汇总
    resTableheaders--日期,坐席总数,呼入总数,总失败次数,咨询次数,转移次数 ,总通话时长,平均通话时长,平均振铃次数,平均振铃时长
    resList--
    	 */
    	public static String exportExcelFromAllStr(String resjson,String clientFileName,OutputStream os,HttpServletResponse response){
    		String info="";
    		JSONObject jo=JSONObject.fromObject(resjson);
    		
        	String title=(String)jo.get("title");
        	String resTableheaders=(String)jo.get("resTableheaders");
        	String resList=(String)jo.get("resList");
        	
        	System.out.println("title--"+title);
        	System.out.println("resTableheaders--"+resTableheaders);
        	ExportExcelUtil.printResListFromAllStr(ExportExcelUtil.getResListFromAllStr(resList));
        	
        	//导出
        	Workbook wb=ExportExcelUtil.createWorkbook(null,title, ExportExcelUtil.getResTableheadersFromAllStr(resTableheaders), ExportExcelUtil.getResListFromAllStr(resList));
    		String res=ExportExcelUtil.exportExcelFileOnWeb(wb, clientFileName, os, response);
    		if(res==null||res.trim().equals("error")){
    			info="error";
    		}else{
    			info=res.trim();
    		}
        	return info;
    	}
    	
    	public static String exportExcelFromAllStrOnServerDownLoad(String resjson,String clientFileName){
    		String infopath="";
    		JSONObject jo=JSONObject.fromObject(resjson);
    		
        	String title=(String)jo.get("title");
        	String resTableheaders=(String)jo.get("resTableheaders");
        	String resList=(String)jo.get("resList");
        	
        	System.out.println("title--"+title);
        	System.out.println("resTableheaders--"+resTableheaders);
        	ExportExcelUtil.printResListFromAllStr(ExportExcelUtil.getResListFromAllStr(resList));
        	
        	//导出
        	Workbook wb=ExportExcelUtil.createWorkbook(null,title, ExportExcelUtil.getResTableheadersFromAllStr(resTableheaders), ExportExcelUtil.getResListFromAllStr(resList));
    		String res=ExportExcelUtil.exportExcelFile(wb, clientFileName, null);
    		if(res==null||res.trim().equals("error")){
    			infopath="error";
    		}else{
    			infopath=res.trim();
    		}
        	return infopath;
    	}
    	
    	//resTableheaders--日期,坐席总数,呼入总数,总失败次数,咨询次数,转移次数 ,总通话时长,平均通话时长,平均振铃次数,平均振铃时长
        public static String[] getResTableheadersFromAllStr(String resTableheaders){
    		String[] arrResTableheaders=resTableheaders.split(",");
    		return arrResTableheaders;
    	}
        //resList--2012-10-17,5,36,3,3,0,54.20,1.64,0,0.11|2012-10-18,5,32,5,1,0,47.10,1.81,0,0.12|2012-10-19,5,32,3,2,0,37.45,1.29,0,0.12|2012-10-22,5,54,6,5,0,92.87,1.98,0,0.09|
        public static String[][] getResListFromAllStr(String resList){
        	String[][] res=null;
        	
        	String[] arrObjList=null;
        	String[] arrObj=null;
        	if(resList==null||resList.trim().equals("")){
        	}else{
        		arrObjList=resList.split("suolong");
        		
        		if(arrObjList!=null&&arrObjList.length>=1){
        			String vo=(String)arrObjList[0];
        			arrObj=vo.split(",");
        			if(arrObj!=null&&arrObj.length>=1){
        				res=new String[arrObjList.length][arrObj.length];
        				//放数据
        				for(int i=0;i<arrObjList.length;i++){
        					String vo2=(String)arrObjList[i];
        	    			String[] arrObj2=vo2.split(",");
        					for(int k=0;k<arrObj2.length;k++){
        						res[i][k]=arrObj2[k];
        					}
        				}
        			}
        		}else{
        			
        		}
        	}
        	
    		return res;
    	}
        //打印表格数据
        public static void printResListFromAllStr(String[][] res){
        	if(res==null){
        		System.out.println("res[][] is null");
        	}else{
        		System.out.println("res[][] 行数："+res.length);
        		if(res.length>=1){
        			System.out.println("res[][] 列数："+res[0].length);
        			for(int i=0;i<res.length;i++){
        				String line="";
        				for(int k=0;k<res[i].length;k++){
        					line+="res["+i+"]["+k+"]"+res[i][k]+",";
        				}
        				line+="\r\n";
        				System.out.println(line);
        			}
        		}
        	}
        	
        }
        
    	public static void main(String[] ss){
    		String[] titles1={"日期","平均振铃时长平均振铃时长","总失败次数"};
    		String[][] sample_data1={
    				{"2012-09-08 18:12:33  kk","12","13"},
    				{"21","22","23"}
    		};
    		Workbook wb=ExportExcelUtil.createWorkbook(null,"gg2", titles1, sample_data1);
    		String res=ExportExcelUtil.exportExcelFile(wb, "测试22",null);
    		System.out.print("res");
    	}
    	/**
    	 * 导出到客户端本地
    	 * @param wb
    	 * @param fileName
    	 * @param os
    	 * @return
    	 */
        public static String exportExcelFileOnWeb(Workbook wb,String fileName,OutputStream os,HttpServletResponse response){
        	String info="";
        	if(wb==null){
        		info="error";
        	}else{
        		String fileName2 = "";
                if(fileName==null||fileName.trim().equals("")){
                	fileName2=ExportExcelUtil.getRandomDateStr()+".xls";
            	}else{
            		fileName2=fileName.trim()+".xls";
            	}
                if(wb instanceof XSSFWorkbook) {
                	fileName2 += "x";
                }
                
        		try {
        			info="tempExport/excel/"+fileName2;
    //    	    	response.setContentType( "application/vnd.ms-excel");//2003
    //    			response.setContentType("application/ms-excel"); //2003
        	    	response.setContentType( "application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");//2007
        			
    //    			response.setContentType("octets/stream");//压缩文件
    //    	    	response.setContentType("application/x-msdownload");//压缩文件
        	    	response.addHeader("Content-Disposition","attachment;filename="+info.trim());
        	    	
        			wb.write(os);
        			os.flush();
        			os.close();
        			
        			System.out.println("成功导出到客户端");
        		} catch (Exception e) {
        			e.printStackTrace();
        		}
        	}
        	
    		return info;
        }
        /**
         * 根据Workbook和文件名导出文件
         * @param wb
         * @param fileName
         * tempExport/excel/xxx.xlsx
         */
        public static String exportExcelFile(Workbook wb,String fileName,String webPath){
        	String info="";
        	if(wb==null){
        		info="error";
        	}else{
        		String fileName2 = "";
                if(fileName==null||fileName.trim().equals("")){
                	fileName2=ExportExcelUtil.getRandomDateStr()+".xls";
            	}else{
            		fileName2=fileName.trim()+".xls";
            	}
                if(wb instanceof XSSFWorkbook) fileName2 += "x";
                
                String wholeFilePath="";
                if(webPath==null||webPath.trim().equals("")){
                	wholeFilePath=ExportExcelUtil.TEMP_EXCEL_PATH+"\\"+fileName2;
                }else{
                	wholeFilePath=webPath.trim()+"\\"+fileName2;
                }
                wholeFilePath=wholeFilePath.replace("\\", "/");
                FileOutputStream out;
        		try {
        			out = new FileOutputStream(wholeFilePath);
        			wb.write(out);
        			out.close();
        			info="tempExport/excel/"+fileName2;
        			System.out.println("成功导出到服务器的临时目录下："+wholeFilePath);
        			System.out.println("返回server路径"+info);
        		} catch (Exception e) {
        			e.printStackTrace();
        		}
        	}
        	
    		return info;
        }
        //随机日期字符串
        public static String getRandomDateStr(){
        	String res="";
        	SimpleDateFormat sdf=new SimpleDateFormat("yyyyMMddHHmmss");
        	res=sdf.format(new Date());
        	String a=String.valueOf((new Date()).getTime());
        	return res+"excel".trim()+a;
        }
        //业务逻辑，产生一个工作簿
        public static Workbook createWorkbook(String typeparam,String tableHeader,String[] titles,String[][] sample_data){
            Workbook wb=null;
            try{
            	if(typeparam==null){
            		wb = new XSSFWorkbook();
            	}
                else if(typeparam.length() > 0 && typeparam.equals("2003")) {wb = new HSSFWorkbook();}
                else {wb = new XSSFWorkbook();}
    
                Map<String, CellStyle> styles = createStyles(wb);
                
                String tableHeader2="";
                if(tableHeader==null||tableHeader.trim().equals("")){
                	tableHeader2=ExportExcelUtil.getRandomDateStr();
                }else{
                	tableHeader2=tableHeader.trim();
                }
                Sheet sheet = wb.createSheet(tableHeader2);
                
                PrintSetup printSetup = sheet.getPrintSetup();
                printSetup.setLandscape(true);
                sheet.setFitToPage(true);
                sheet.setHorizontallyCenter(true);
    
                //title row
                Row titleRow = sheet.createRow(0);
                titleRow.setHeightInPoints(35);
                Cell titleCell = titleRow.createCell(0);
                titleCell.setCellValue(tableHeader2);
                titleCell.setCellStyle(styles.get("title"));
                sheet.addMergedRegion(CellRangeAddress.valueOf("$A$1:$L$1"));
    
                //header row
                Row headerRow = sheet.createRow(1);
                headerRow.setHeightInPoints(30);
                Cell headerCell;
                if(titles!=null){
                	for (int i = 0; i < titles.length; i++) {
                        headerCell = headerRow.createCell(i);
                        headerCell.setCellValue(titles[i]);
                        headerCell.setCellStyle(styles.get("header"));
                    }
                }
                
                // data row
                if(sample_data!=null){
                	for (int i = 0; i < sample_data.length; i++) {
                        Row row = sheet.createRow(2+i);
                        row.setHeightInPoints(20);
                        for (int j = 0; j < sample_data[i].length; j++) {
                        	Cell dataCell=row.createCell(j);
                        	dataCell.setCellStyle(styles.get("cell"));
                        	
                            if(sample_data[i][j] == null) continue;
                            if(sample_data[i][j] instanceof String) {
                            	dataCell.setCellValue((String)sample_data[i][j]);
                            } else {
                            	dataCell.setCellValue(sample_data[i][j].toString());
                            }
                        }
                    }
                }
                
                //finally set column widths, the width is measured in units of 1/256th of a character width
                if(titles!=null){
                	for (int i = 0; i < titles.length; i++) {
                    	int tlen1=(titles[i]==null)?7:titles[i].length();
                    	int tlen=(tlen1<7)?7:tlen1;
                    	
                    	int len=(tlen*256*3)+5;
                        sheet.setColumnWidth(i, len);  //6 characters wide
                    }
                }
                
            }catch(Exception ee){
            	ee.printStackTrace();
            }
            
            return wb;
        }
    
        /**公用的css样式集，放在一个map中。
         * Create a library of cell styles
         */
        private static Map<String, CellStyle> createStyles(Workbook wb){
            Map<String, CellStyle> stylesMap = new HashMap<String, CellStyle>();
            
            CellStyle style;
            
            Font titleFont = wb.createFont();
            titleFont.setFontHeightInPoints((short)18);
            titleFont.setBoldweight(Font.BOLDWEIGHT_BOLD);
            style = wb.createCellStyle();
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            style.setFont(titleFont);
            stylesMap.put("title", style);
    
            Font monthFont = wb.createFont();
            monthFont.setFontHeightInPoints((short)11);
            monthFont.setColor(IndexedColors.BLACK.getIndex());
            style = wb.createCellStyle();
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            style.setFillForegroundColor(IndexedColors.LIGHT_CORNFLOWER_BLUE.getIndex());
            style.setFillPattern(CellStyle.SOLID_FOREGROUND);
            style.setFont(monthFont);
            style.setWrapText(true);
            style.setBorderRight(CellStyle.BORDER_THIN);
            style.setBorderTop(CellStyle.BORDER_THIN);
            stylesMap.put("header", style);
    
            style = wb.createCellStyle();
            Font cell= wb.createFont();
            cell.setColor(IndexedColors.BLUE.getIndex());
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setWrapText(true);
            style.setBorderRight(CellStyle.BORDER_THIN);
            style.setRightBorderColor(IndexedColors.BLACK.getIndex());
            style.setBorderLeft(CellStyle.BORDER_THIN);
            style.setLeftBorderColor(IndexedColors.BLACK.getIndex());
            style.setBorderTop(CellStyle.BORDER_THIN);
            style.setTopBorderColor(IndexedColors.BLACK.getIndex());
            style.setBorderBottom(CellStyle.BORDER_THIN);
            style.setBottomBorderColor(IndexedColors.BLACK.getIndex());
            style.setFillForegroundColor(IndexedColors.BLUE.getIndex());
            stylesMap.put("cell", style);
    
            style = wb.createCellStyle();
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex());
            style.setFillPattern(CellStyle.SOLID_FOREGROUND);
            style.setDataFormat(wb.createDataFormat().getFormat("0.00"));
            stylesMap.put("formula", style);
    
            style = wb.createCellStyle();
            style.setAlignment(CellStyle.ALIGN_CENTER);
            style.setVerticalAlignment(CellStyle.VERTICAL_CENTER);
            style.setFillForegroundColor(IndexedColors.GREY_40_PERCENT.getIndex());
            style.setFillPattern(CellStyle.SOLID_FOREGROUND);
            style.setDataFormat(wb.createDataFormat().getFormat("0.00"));
            stylesMap.put("formula_2", style);
    
            return stylesMap;
        }
    
    
    }

页面访问，之前设置过setContentType，没有弹出文件保存框的原因也找到了。

就是下载的请求不能用ajax，（或许需要其他设置，这里我做的时候就是不行），

请求使用window.location.href就可以弹出保存框，使用ajax就没反应，在回调函数中

返回的是乱码。原因不详，总之别用ajax调用下载文件的servlert请求。

function pdfservlet(){
    	var resjson=getResJson();
    	var urlpath1=path+'/ExportPdfServlet?dd='+Math.random()+'&resjson='+resjson;
    	var urlpath2=encodeURI(urlpath1);
    	var urlpath=encodeURI(urlpath2);
    	window.location.href=urlpath;
    }
    function excelServlet(){
    	var resjson=getResJson();
    	//var urlpath1=path+'/PdfItextServlet?dd='+Math.random()+'&resjson='+resjson;
    	var urlpath1=path+'/ExportExcelServlet?dd='+Math.random()+'&resjson='+resjson;
    	var urlpath2=encodeURI(urlpath1);
    	var urlpath=encodeURI(urlpath2);
    	window.location.href=urlpath;
    	
    }

思路（二）是发请求在服务器生成文件，ajax访问返回这个文件的url，在回调函数中请求这个url。

思路不好，还是可行的。代码如下：

pdf

package org.hd.report.action.pdf;
    
    import java.io.OutputStream;
    import java.io.PrintWriter;
    import java.util.List;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import net.sf.json.JSONObject;
    
    import org.apache.struts2.ServletActionContext;
    import org.hd.report.model.GreenPageVo;
    import org.hd.report.service.ReportService;
    import org.hd.report.service.RptService;
    import org.hd.util.ExportExcelUtil;
    import org.hd.util.ExportPdfUtil;
    import org.rd.framework.common.container.ContainerManager;
    import org.rd.framework.query.support.PaginationSupport;
    import org.rd.framework.struts.action.CommonAction;
    
    import com.opensymphony.xwork2.ActionContext;
    
    //呼入汇总
    public class ExportTableDataToPdfAction  extends CommonAction{
    	private RptService rptService = (RptService)ContainerManager.getComponent(RptService.BEAN_ID);
    	
    	public String exportPdfInSummary() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		response.setCharacterEncoding("UTF-8");
    //		response.setContentType("application/pdf");
    //		response.setContentType("text/xml");
    		PrintWriter out = response.getWriter();
    		
        	String resjson= request.getParameter("resjson") != null ? request.getParameter("resjson").trim() : "";
        	resjson=java.net.URLDecoder.decode(resjson,"UTF-8");
        	System.out.println("resjson from page--"+resjson);
        	
        	String clientFileName="";
        	String infopath=ExportPdfUtil.createPdfWithJson(resjson);
        	
        	out.println(infopath);
        	
    		return NONE;
    	}
    	public String execute() throws Exception{
    		return SUCCESS;
    	}
    
    }

excel

package org.hd.report.action.excel;
    
    import java.io.OutputStream;
    import java.io.PrintWriter;
    import java.util.List;
    
    import javax.servlet.http.HttpServletRequest;
    import javax.servlet.http.HttpServletResponse;
    
    import net.sf.json.JSONObject;
    
    import org.apache.struts2.ServletActionContext;
    import org.hd.report.model.GreenPageVo;
    import org.hd.report.service.ReportService;
    import org.hd.report.service.RptService;
    import org.hd.util.ExportExcelUtil;
    import org.rd.framework.common.container.ContainerManager;
    import org.rd.framework.query.support.PaginationSupport;
    import org.rd.framework.struts.action.CommonAction;
    
    import com.opensymphony.xwork2.ActionContext;
    
    //呼入汇总
    public class ExportTableDataToExcelAction  extends CommonAction{
    	private RptService rptService = (RptService)ContainerManager.getComponent(RptService.BEAN_ID);
    	
    	public String exportExcelInSummary() throws Exception{
    		
    		ActionContext ctx = ActionContext.getContext();
    		HttpServletResponse response = (HttpServletResponse) ctx.get(ServletActionContext.HTTP_RESPONSE); 
    		HttpServletRequest request  = (HttpServletRequest) ctx.get(ServletActionContext.HTTP_REQUEST); 
    		response.setCharacterEncoding("UTF-8");
    		
    //		response.setContentType( "application/vnd.ms-excel");
    //    	response.addHeader("Content-Disposition","attachment;filename=output.xlsx");
        	
    //		response.setContentType("application/ms-excel"); 
    //		response.addHeader("Content-Disposition","attachment;filename=output.xlsx");
    		
    //		response.setContentType("octets/stream");
    //        response.addHeader("Content-Disposition","attachment;filename=output.xlsx");
    
    		
    		PrintWriter out = response.getWriter();
    //		OutputStream os=response.getOutputStream();
    		
        	String resjson= request.getParameter("resjson") != null ? request.getParameter("resjson").trim() : "";
        	resjson=java.net.URLDecoder.decode(resjson,"UTF-8");
        	System.out.println("resjson from page--"+resjson);
        	
        	String clientFileName="";
    //    	String info=ExportExcelUtil.exportExcelFromAllStr(resjson, clientFileName, os);
        	String infopath=ExportExcelUtil.exportExcelFromAllStrOnServerDownLoad(resjson, clientFileName);
        	
        	out.println(infopath);
        	
    		return NONE;
    	}
    	public String execute() throws Exception{
    		return SUCCESS;
    	}
    
    }

struts.xml

<action name="exportExcelInSummary" class="org.hd.report.action.excel.ExportTableDataToExcelAction" method="exportExcelInSummary">
    		</action>
    		<action name="exportPdfInSummary" class="org.hd.report.action.pdf.ExportTableDataToPdfAction" method="exportPdfInSummary">
    		</action>

页面调用：

getResJson（）是拼装json数据的方法，业务逻辑。

至于请求的url都调用了2遍encodeURI（），就是为了防止中文参数乱码。

记住必须是2次。