呼叫方法：

<dependency>  
    <groupId>com.lowagie</groupId>  
    <artifactId>itext</artifactId>  
    <version>2.0.8</version>  
</dependency>

<dependency>
    <groupId>org.xhtmlrenderer</groupId>
    <artifactId>core-renderer</artifactId
 
>
    <version>R8</version>
</dependency>

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@RequestMapping("/creditAgreementPDFDownload")
    @ResponseBody
    public void creditAgreementPDFDownload(HttpServletRequest request, HttpServletResponse response) throws Exception {
        //資料封裝部分
        Map map = new HashMap<String, String>();
        map.put("test"
 
, "---中國---");

        try {
            ByteArrayOutputStream baos = PDFUtil.createPDF(request, "creditAgreementPDF.ftl", map);
            System.out.println(baos);
            //設定response檔案頭
            PDFUtil.renderPdf(response, baos.toByteArray(), "123");
        } catch (Exception e) {
            throw
 
 new Exception(e);
        }
    }

    /**
     * 生成PDF檔案流
     * @param request
     * @param ftlName 檔名稱
     * @param root  資料
     * @return ByteArrayOutputStream
     * @throws Exception
     */
    public static ByteArrayOutputStream createPDF(HttpServletRequest request, String ftlName, Object root) throws Exception {
        String basePath = request.getSession().getServletContext().getRealPath("/");//絕對路徑
        Configuration cfg = new Configuration();
        try {
            cfg.setLocale(Locale.CHINA);
            cfg.setEncoding(Locale.CHINA, "UTF-8");
            //設定編碼
            cfg.setDefaultEncoding("UTF-8");
            //設定模板路徑
            cfg.setDirectoryForTemplateLoading(new File(basePath + "/WEB-INF/ftl/"));

            //獲取模板
            Template template = cfg.getTemplate(ftlName);
            template.setEncoding("UTF-8");  

            ITextRenderer iTextRenderer = new ITextRenderer();
            //設定字型
            ITextFontResolver fontResolver = iTextRenderer.getFontResolver();
            fontResolver.addFont(basePath + "/WEB-INF/classes/simsun.ttf", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);

            Writer writer = new StringWriter();
            //資料填充模板
            template.process(root, writer);
            //設定輸出檔案內容及路徑
            String str = writer.toString();
            iTextRenderer.setDocumentFromString(str);
            iTextRenderer.getSharedContext().setBaseURL("file:/D:");//共享路徑file:/home/ddcj/
            iTextRenderer.layout();

            //生成PDF
            ByteArrayOutputStream baos = new ByteArrayOutputStream();
            iTextRenderer.createPDF(baos);
            baos.close();

            return baos;
        } catch(Exception e) {
            throw new Exception(e);
        }
    }

    //此方法主要是設定檔案頭，並把檔案作為附件下載
    public static void renderPdf(HttpServletResponse response, final byte[] bytes, final String filename) {
        setFileDownloadHeader(response, filename, ".pdf");
        if (null != bytes) {
            try {
                response.getOutputStream().write(bytes);
                response.getOutputStream().flush();
            } catch (IOException e) {
                throw new IllegalArgumentException(e);
            }
        }
    }

/**
     * 設定讓瀏覽器彈出下載對話方塊的Header.
     * @param fileName下載後的檔名.
     */
    public static void setFileDownloadHeader(HttpServletResponse response, String fileName, String fileType) {
        try {
            // 中文檔名支援
            String encodedfileName = new String(fileName.getBytes("GBK"), "ISO8859-1");
            response.setHeader("Content-Disposition", "attachment; filename=\"" + encodedfileName + fileType + "\"");
        } catch (UnsupportedEncodingException e) {
        }
    }

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匯出失敗，提示匯出路徑異常； 
替換異常jar

<dependency>
    <groupId>xalan</groupId>
    <artifactId>xalan</artifactId>
    <version>2.7.1</version>
</dependency>

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先存在的問題：匯出表格列數比較多時，有一部分列顯示不出來；

轉載地址：http://blog.csdn.net/NetSnake_/article/details/77161106