java原裝代碼完成pdf在線預(yù)覽和pdf打印及下載
前提準(zhǔn)備:
1. 項目中至少需要引入的jar包,注意版本:
a) core-renderer.jar
b) freemarker-2.3.16.jar
c) iText-2.0.8.jar
d) iTextAsian.jar
上代碼:
注釋: 此類為自定義的Tag類的基類,在action中怎么放的數(shù)據(jù),在ftl中就怎么取數(shù)據(jù),簡潔明了。
1. 自定義Tag類的基類
/** * 通用的生成pdf預(yù)覽和生成打印的html文件 * * @author xg君 * */ public abstract class PDFTag extends BodyTagSupport { private static final long serialVersionUID = 1L; // 標(biāo)簽屬性變量 private String json = ""; private String tempDir = ""; // 非標(biāo)簽屬性變量 private Map<String, Object> rootMap = new HashMap<String, Object>(); private String templateStr = null; private String freemarkereConfigurationBeanName = null; private String fileName = null; private String basePath = null; private String fileEncoding = "utf-8"; @Override public int doStartTag() throws JspException { setConfigParams(); WebApplicationContext application = WebApplicationContextUtils.getWebApplicationContext(pageContext .getServletContext()); doServiceStart(); String ctx = (String) pageContext.getAttribute("ctx"); rootMap.put("ctx", ctx); Map<String, Object> map = parseJSON2Map(json); rootMap.putAll(map); if (freemarkereConfigurationBeanName == null) { try { throw new CstuException("FreemarkereConfigurationBeanName不能為空!"); } catch (CstuException e) { e.printStackTrace(); } } Configuration cptFreemarkereConfiguration = (Configuration) application .getBean(freemarkereConfigurationBeanName); try { if (templateStr == null) { throw new CstuException("模板文件不能為空!"); } Template template = cptFreemarkereConfiguration.getTemplate(templateStr); if (basePath == null) { throw new CstuException("文件的基本路徑(父路徑)不能為空!"); } File htmlPath = new File(tempDir + File.separator + basePath); if (!htmlPath.exists()) { htmlPath.mkdirs(); } if (fileName == null) { throw new CstuException("生成的html文件名不能為空!"); } File htmlFile = new File(htmlPath, File.separator + fileName); if (!htmlFile.exists()) { htmlFile.createNewFile(); } BufferedWriter out = new BufferedWriter( new OutputStreamWriter(new FileOutputStream(htmlFile), fileEncoding)); template.process(rootMap, out); out.flush(); doServiceDoing(); // 顯示在頁面 template.process(rootMap, pageContext.getResponse().getWriter()); } catch (Exception e) { e.printStackTrace(); } doServiceEnd(); return SKIP_BODY; } /** * 配置基礎(chǔ)參數(shù),如 */ public abstract void setConfigParams(); /** * 業(yè)務(wù)處理方法-開始 填充數(shù)據(jù) * * @return */ public abstract void doServiceStart(); /** * 業(yè)務(wù)處理方法-執(zhí)行中 備用,可空實現(xiàn),若rootMap中存在雙份數(shù)據(jù)則可在此處填充判斷條件 * * @return */ public abstract void doServiceDoing(); /** * 業(yè)務(wù)處理方法-結(jié)束 清空rootMap并調(diào)用垃圾回收,也可空實現(xiàn) * * @return */ public abstract void doServiceEnd(); /** * 將元素放入rootMap中 */ public void putKV(String key, Object value) { rootMap.put(key, value); } /** * 將map放入rootMap中 * * @param m */ public void putMap(Map m) { rootMap.putAll(m); } public void clear() { rootMap.clear(); rootMap = null; } /** * 移除元素 * * @param key * @return */ public Object remove(String key) { return rootMap.remove(key); } public static Map<String, Object> parseJSON2Map(String jsonStr) { Map<String, Object> map = new HashMap<String, Object>(); JSONObject json = JSONObject.fromObject(jsonStr); for (Object k : json.keySet()) { Object v = json.get(k); if (v instanceof JSONArray) { List<Map<String, Object>> list = new ArrayList<Map<String, Object>>(); Iterator<JSONObject> it = ((JSONArray) v).iterator(); while (it.hasNext()) { JSONObject json2 = it.next(); list.add(parseJSON2Map(json2.toString())); } map.put(k.toString(), list); } else { map.put(k.toString(), v); } } return map; } public String getJson() { return json; } public void setJson(String json) { this.json = json; } public String getTempDir() { return tempDir; } public void setTempDir(String tempDir) { this.tempDir = tempDir; } public String getTemplateStr() { return templateStr; } public void setTemplateStr(String templateStr) { this.templateStr = templateStr; } public String getFreemarkereConfigurationBeanName() { return freemarkereConfigurationBeanName; } public void setFreemarkereConfigurationBeanName(String freemarkereConfigurationBeanName) { this.freemarkereConfigurationBeanName = freemarkereConfigurationBeanName; } public String getFileName() { return fileName; } public void setFileName(String fileName) { this.fileName = fileName; } public String getBasePath() { return basePath; } public void setBasePath(String basePath) { this.basePath = basePath; } public String getFileEncoding() { return fileEncoding; } public void setFileEncoding(String fileEncoding) { this.fileEncoding = fileEncoding; } }
注釋: setConfigParams方法是用于調(diào)用接口定義的配置參數(shù)的方法,如:templateStr,basePath等,doServiceStart,doServiceDoing和doServiceEnd等方法用于處理業(yè)務(wù)邏輯,比如我的需求是做出合同在一個頁面顯示,要分頁,要加水印,但生成的pdf樣式與預(yù)覽的是不同的,所以我加了一個doServiceDoing中給rootMap添加判斷條件,這樣就能一個flt文件作出兩種效果(預(yù)覽和打印),當(dāng)然如果預(yù)覽和打印要一樣的效果,doServiceDoing方法可以空實現(xiàn)。這四個方法總結(jié)一下就是:
1. setConfigParams : 配置參數(shù)
2. doServiceStart : 填充數(shù)據(jù)/條件
3. doServiceDoing : 填充數(shù)據(jù)/條件,到這里是個分界線,此方法之前,rootMap數(shù)據(jù)先進入html再進入瀏覽器(預(yù)覽),此方法之后,rootMap數(shù)據(jù)會再次進入html文件,結(jié)束,所以此處可寫判斷
4. doServiceEnd : 可有可無,我還是寫上了,萬一哪天的數(shù)據(jù)集太大,此處便可以在數(shù)據(jù)填充完后,清理掉,節(jié)省內(nèi)存空間
2. PDFTag的子類
/** * 用戶自定義PDFTag類 * * @author xg君 * */ public class ViewPDFTag extends PDFTag { private static final long serialVersionUID = 4528567203497016087L; private String prjNature = ""; private String bookName = ""; private String prjCode = ""; /** * 用戶自定義的配置參數(shù) */ public PDFConfigurationInterface pDFConfigurationInterface = new PDFConfigurationInterface() { @Override public void configTemplateStr() { // 橫,縱向 if (prjNature.equalsIgnoreCase("2") || prjNature.equalsIgnoreCase("1")) { setTemplateStr("wj-project-print.ftl"); } } @Override public void configFreemarkereConfigurationBeanName() { setFreemarkereConfigurationBeanName("cptFreemarkereConfiguration"); } @Override public void configFileName() { // 填入html文件 setFileName(prjCode + ".html"); } @Override public void configFileEncoding() { // 默認(rèn)utf-8 } @Override public void configBasePath() { setBasePath("html_pdf"); } }; @Override public void doServiceStart() { putKV("prjNature", prjNature); putKV("bookName", bookName); putKV("flag", "0"); } @Override public void doServiceDoing() { putKV("flag", "1"); } @Override public void doServiceEnd() { clear(); System.gc(); } public String getPrjNature() { return prjNature; } public void setPrjNature(String prjNature) { this.prjNature = prjNature; } public String getBookName() { return bookName; } public void setBookName(String bookName) { this.bookName = bookName; } public String getPrjCode() { return prjCode; } public void setPrjCode(String prjCode) { this.prjCode = prjCode; } @Override public void setConfigParams() { pDFConfigurationInterface.configTemplateStr(); pDFConfigurationInterface.configFreemarkereConfigurationBeanName(); pDFConfigurationInterface.configFileName(); pDFConfigurationInterface.configBasePath(); pDFConfigurationInterface.configFileEncoding(); } }
注釋: PDFConfigurationInterface 是自定義的標(biāo)簽參數(shù)配置接口,子類必須定義一個該接口的實現(xiàn)類的成員變量或定義一個成員變量內(nèi)部類,并在setConfigParams方法中調(diào)用使其生效。
子類的成員變量接收在tld文件中配置的屬性。
3. 自定義的標(biāo)簽參數(shù)配置接口
/** * PdfTag類的配置 * * @author xg君 * */ public interface PDFConfigurationInterface { /** * 設(shè)置模板名稱 */ void configTemplateStr(); /** * 設(shè)置配置的FreemarkereConfigurationBean的名稱 */ void configFreemarkereConfigurationBeanName(); /** * 設(shè)置生成的html文件名稱 */ void configFileName(); /** * 設(shè)置生成的html文件的基本路徑(父目錄) */ void configBasePath(); /** * 設(shè)置文件編碼,默認(rèn)utf-8 */ void configFileEncoding(); }
4. 自定義異常類
/** * 自定義異常類 * * @author Administrator * */ public class CstuException extends Exception { private static final long serialVersionUID = 4266461814747405870L; public CstuException(String msg) { super(msg); } }
5. tld文件配置
<tag> <name>print</name> <tagclass>com.iris.taglib.web.PreviewPDFTag</tagclass> <bodycontent>JSP</bodycontent> <attribute> <name>json</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>prjNature</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>bookName</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>tempDir</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> <attribute> <name>prjCode</name> <required>true</required> <rtexprvalue>true</rtexprvalue> </attribute> </tag>
6. action
/** * 處理PDF導(dǎo)出 * */ @Namespace("/export") @Results({ @Result(name = "exceltemplate", location = "/WEB-INF/content/pdf/export-pdf.jsp"), @Result(name = "exprotPdf2", location = "/WEB-INF/content/project/project/export/export-pdf2.jsp") }) public class ExportPdfAction extends ActionSupport { private static final long serialVersionUID = -5454188364706173477L; @Value("${tempDir}") private String tempDir; @Value("${pdfFont}") private String pdfFont; @Value("${staticResRootDir}") private String staticResRootDir; @Value("${staticResRootDir2}") private String staticResRootDir2; @Value("${WaterMarkImgDir}") private String waterMarkImgDir; @Autowired private ProjectService projectService; @Autowired private PersonService personService; @Autowired private ConstDictionaryService constDictionaryService; @Autowired private FdPlanDetailService fdPlanDetailService; @Autowired private ServiceFactory serviceFactory; @Action("exprotPdf2") public String exprotPdf2() { String prjCode = Struts2Utils.getParameter("prjCode"); prjCode = Struts2Utils.decodeDesString(prjCode); Project project = projectService.getProjectById(Long.parseLong(prjCode)); Map<String, String> baseInfo = new HashMap<String, String>(); baseInfo.put("tempDir", tempDir); // 項目編號 baseInfo.put("prjCode", prjCode); // 項目類型 String prjNature = project.getPrjNature(); baseInfo.put("prjNature", prjNature); // 水印名稱格式:watermark+"-"+prjNature baseInfo.put("waterMarkImg", waterMarkImgDir + File.separator + "watermark-" + prjNature + ".png"); // 負(fù)責(zé)人 Person person = personService.getPerson(project.getPsnCode()); String zhName = person.getZhName(); baseInfo.put("zhName", addStr(9, "<br/>", zhName)); // 項目編號 String prjNo = project.getPrjNo(); baseInfo.put("prjNo", prjNo); // 項目來源 ConstDictionary cd = constDictionaryService.findCdByCategoryCode("project_from", project.getGrantNo()); String project_from = cd.getzh_cn_caption(); baseInfo.put("project_from", addStr(9, "<br/>", project_from)); SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd"); // 起止年限 String startDate = sdf.format(project.getStartDate()); String endDate = sdf.format(project.getEndDate()); String startEndDate = startDate + "~" + endDate; baseInfo.put("startEndDate", startEndDate); // 項目類別--資助類別 String grantName = project.getGrantName(); baseInfo.put("grantName", addStr(9, "<br/>", grantName)); // 合同金額 String totalAmt = project.getTotalAmt().toString(); BigDecimal totalAmt_ = checkNumber(totalAmt); baseInfo.put("totalAmt", totalAmt_.toString()); // 項目名稱 String zhTitle = project.getZhTitle(); baseInfo.put("zhTitle", addStr(38, "<br/>", zhTitle)); List<Map<String, String>> ps = null; try { ps = getMembers(project.getPrjXml()); } catch (Exception e) { e.printStackTrace(); } String bookName = ""; // 判斷項目類型 Map<String, Object> itemMap = new HashMap<String, Object>(); if (prjNature.equalsIgnoreCase("1")) { bookName = "第一份合同"; // 獲取fdPlanDetail List<Map<String, Object>> list = fdPlanDetailService.getFdPlanDetailsByPrjCode(Long.parseLong(prjCode)); // test /* * Map<String, Object> test = new HashMap<String, Object>(); test.put("itemValue", "6"); * test.put("itemName", "差旅費"); test.put("remark", "xxxxx"); list.add(test); */ for (Map<String, Object> m : list) { String key = (String) m.get("ITEMNAME"); BigDecimal itemValue = (BigDecimal) m.get("ITEMVALUE"); BigDecimal proportion = new BigDecimal(0.00); if (itemValue != null && totalAmt_.compareTo(new BigDecimal("0.00")) != 0) { proportion = itemValue.divide(totalAmt_, 6, BigDecimal.ROUND_HALF_EVEN); } if (itemValue == null) { itemValue = new BigDecimal("0.00"); } proportion = checkNumber(proportion.toString()); Map<String, Object> data = new HashMap<String, Object>(); // 添加比例 data.put("proportion", proportion.toString()); // 檢測金額規(guī)范 BigDecimal amt = checkNumber(itemValue.toString()); data.put("itemValue", amt.toString()); // remark String remark = (String) m.get("REAMRK"); data.put("remark", remark == null ? "" : remark); itemMap.put(key, data); } } else if (prjNature.equalsIgnoreCase("2")) { bookName = "第二份合同"; } Map<String, Object> map = new HashMap<String, Object>(); map.put("baseInfo", baseInfo); map.put("projectMember", ps); map.put("itemMap", itemMap); map.put("psCount", ps.size()); map.put("psSum", 25 - ps.size()); String json = JSONObject.fromObject(map).toString(); Struts2Utils.getRequest().setAttribute("jsonData", json); Struts2Utils.getRequest().setAttribute("prjNature", prjNature); Struts2Utils.getRequest().setAttribute("bookName", bookName); Struts2Utils.getRequest().setAttribute("tempDir", tempDir); Struts2Utils.getRequest().setAttribute("prjCode", prjCode); return "exprotPdf2"; } public List<Map<String, String>> getMembers(String xmlData) throws Exception { List<Map<String, String>> list = new ArrayList<Map<String, String>>(); Document doc = DocumentHelper.parseText(xmlData); Node ps = doc.selectSingleNode("/data/project/persons"); List<Node> psList = ps.selectNodes("person"); String totalAmt = doc.selectSingleNode("/data/project/basic_info/total_amt").getText(); for (Node person : psList) { Map<String, String> map = new HashMap<String, String>(); Node fund_proportion = person.selectSingleNode("fund_proportion"); String fund_proportion_text = ""; if (fund_proportion == null) { map.put("proportion", "0.00"); map.put("fpAmt", "0.00"); } else { fund_proportion_text = fund_proportion.getText(); BigDecimal fp = new BigDecimal(fund_proportion_text); fp = fp.multiply(new BigDecimal("0.01")); fp = checkNumber(fp.toString()); map.put("proportion", fp.toString()); BigDecimal fdAmt_ = fp.multiply(new BigDecimal(totalAmt)); fdAmt_ = checkNumber(fdAmt_.toString()); map.put("fpAmt", fdAmt_.toString()); } Node psn_name = person.selectSingleNode("psn_name"); String psn_name_text = psn_name.getText(); map.put("zhName_p", addStr(9, "<br/>", psn_name_text)); Node psn_work = person.selectSingleNode("psn_work"); String psn_work_text = ""; if (psn_work != null) { psn_work_text = psn_work.getText(); } map.put("work", addStr(9, "<br/>", psn_work_text)); Node dept_code_name = person.selectSingleNode("dept_code_name"); String dept_code_name_text = ""; if (dept_code_name != null) { dept_code_name_text = dept_code_name.getText(); } map.put("deptName", addStr(9, "<br/>", dept_code_name_text)); Node psn_type_name = person.selectSingleNode("psn_type_name"); String psn_type_name_text = ""; if (psn_type_name != null) { psn_type_name_text = psn_type_name.getText(); } map.put("psnTypeName", psn_type_name_text); list.add(map); } return list; } /** * 為字符串添加指定字符 * * @param num * @param splitStr * @param str * @return */ public String addStr(int num, String splitStr, String str) { StringBuffer sb = new StringBuffer(); String temp = str; int len = str.length(); while (len > 0) { if (len < num) { num = len; } sb.append(temp.substring(0, num)).append(splitStr); temp = temp.substring(num); len = temp.length(); } return sb.toString(); } /** * 兩個數(shù)字/英文 * * @param str * @param num * @return 最終索引 */ public static int getEndIndex(String str, double num) { int idx = 0; int count = 0; double val = 0.00; // 判斷是否是英文/數(shù)字 for (int i = 0; i < str.length(); i++) { if ((str.charAt(i) >= 'A' && str.charAt(i) <= 'Z') || (str.charAt(i) >= 'a' && str.charAt(i) <= 'z') || Character.isDigit(str.charAt(i))) { val += 0.50; } else { val += 1.00; } count = i + 1; if (val >= num) { idx = i; break; } } if (idx == 0) { idx = count; } return idx; } /** * 下載pdf文件 * * @return */ @Action("downLoad") public String downLoad() { String prjCode = Struts2Utils.getParameter("prjCode"); String basePath = "html_pdf"; Project project = projectService.getProjectById(Long.parseLong(prjCode)); String zhTitle = project.getZhTitle(); FileOutputStream fos = null; // html File htmlFile = new File(tempDir + File.separator + basePath + File.separator + prjCode + ".html"); String pdfPath = tempDir + File.separator + basePath + File.separator + zhTitle + ".pdf"; try { fos = new FileOutputStream(pdfPath); String url = htmlFile.toURI().toURL().toString(); ITextRenderer renderer = new ITextRenderer(); renderer.setDocument(url); ITextFontResolver fontResolver = renderer.getFontResolver(); fontResolver.addFont(pdfFont + File.separator + "SimSun.ttc", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED); renderer.layout(); renderer.createPDF(fos); } catch (Exception e) { e.printStackTrace(); } finally { try { if (fos != null) { fos.close(); } } catch (IOException e) { e.printStackTrace(); } } // 添加水印 String wartermark = ""; if (project.getPrjNature().equalsIgnoreCase("1")) { // 橫向 wartermark = "CTGU橫向科研項目立項通知書"; } else if (project.getPrjNature().equalsIgnoreCase("2")) { // 縱向 wartermark = "CTGU縱向科研項目立項通知書"; } String wm_pdf = tempDir + File.separator + "wm_" + project.getZhTitle() + ".pdf"; try { BufferedOutputStream bos = new BufferedOutputStream(new FileOutputStream(wm_pdf)); waterMark(bos, pdfPath, wartermark, staticResRootDir2 + File.separator + waterMarkImgDir + File.separator + "watermark-" + project.getPrjNature() + ".png"); } catch (Exception e2) { e2.printStackTrace(); } // 拿到pdf File pdfFile = new File(wm_pdf); BufferedOutputStream out = null; FileInputStream in = null; try { in = new FileInputStream(pdfFile); HttpServletResponse response = Struts2Utils.getResponse(); response.reset(); String fileName = zhTitle + ".pdf"; String fileName2 = URLEncoder.encode(fileName, "UTF-8"); String agent = Struts2Utils.getRequest().getHeader("USER-AGENT"); // IE if (null != agent && -1 != agent.indexOf("MSIE")) { fileName2 = new String(fileName.getBytes("GBK"), "ISO8859-1"); } else if (null != agent && -1 != agent.indexOf("Mozilla")) { fileName2 = new String(fileName.getBytes("UTF-8"), "ISO8859-1"); } response.setCharacterEncoding("UTF-8"); response.setHeader("Content-Disposition", "attachment;filename=\"" + fileName2 + "\""); response.setContentType(FileContentTypes.getContentType(zhTitle + ".pdf")); out = new BufferedOutputStream(response.getOutputStream()); byte[] buffer = new byte[16 * 1024]; int len = 0; while ((len = in.read(buffer)) > 0) { out.write(buffer, 0, len); } out.flush(); } catch (Exception e) { e.printStackTrace(); } finally { if (out != null) { try { out.close(); } catch (IOException e1) { e1.printStackTrace(); } try { in.close(); } catch (IOException e) { e.printStackTrace(); } } } // 清理殘留文件 // if (htmlFile.exists()) { // htmlFile.delete(); // } File temp_file = new File(pdfPath); if (temp_file.exists()) { temp_file.delete(); } if (pdfFile.exists()) { pdfFile.delete(); } return null; } public BigDecimal checkNumber(String number) { // 初始化為6位小數(shù) DecimalFormat df = new DecimalFormat("0.000000"); String num = df.format(Double.parseDouble(number)); BigDecimal bd = new BigDecimal(num); String val = bd.toString(); val = val.replaceAll("^(0+)", ""); val = val.replaceAll("(0+)$", ""); int idx = val.indexOf("."); int len = val.substring(idx + 1).length(); if (len < 2) { if (len == 0 && idx == 0) { bd = new BigDecimal("0.00"); } else { bd = new BigDecimal(val).setScale(2); } } else { bd = new BigDecimal(val).setScale(len); } return bd; } private String replaceStr(String str, String reVal) { Pattern pattern = Pattern.compile("^" + reVal + "+|" + reVal + "+$"); Matcher matcher = pattern.matcher(str); return matcher.replaceAll(""); } /** * 添加水印 */ private void waterMark(BufferedOutputStream bos, String input, String waterMarkName, String imagePath) { try { PdfReader reader = new PdfReader(input); PdfStamper stamper = new PdfStamper(reader, bos); int total = reader.getNumberOfPages() + 1; PdfContentByte content; BaseFont base = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.EMBEDDED); PdfGState gs = new PdfGState(); for (int i = 1; i < total; i++) { content = stamper.getOverContent(i);// 在內(nèi)容上方加水印 content.setGState(gs); content.beginText(); Image image = Image.getInstance(imagePath); image.setAbsolutePosition(-30, 200); image.scalePercent(80); content.addImage(image); content.endText(); } stamper.close(); } catch (Exception e) { e.printStackTrace(); } } }
7. ftl文件(模板文件)
<?xml version="1.0" encoding="UTF-8"?> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <title>打印預(yù)覽</title> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" /> ...... </head> <body> </body> </html>
預(yù)覽效果:
打印效果:
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