java原裝代碼完成pdf在線預(yù)覽和pdf打印及下載

更新時(shí)間：2017年02月06日 14:29:55 作者：追逐繁星

本文主要介紹了java原裝代碼完成pdf在線預(yù)覽和pdf打印及下載的方法，具有一定的參考價(jià)值，下面跟著小編一起來(lái)看下吧

前提準(zhǔn)備：

1. 項(xiàng)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(lèi)為自定義的Tag類(lèi)的基類(lèi)，在action中怎么放的數(shù)據(jù)，在ftl中就怎么取數(shù)據(jù)，簡(jiǎn)潔明了。

1. 自定義Tag類(lèi)的基類(lèi)

 /**
 * 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(yè)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(kāi)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(shí)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(shí)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(gè)頁(yè)面顯示，要分頁(yè)，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(gè)doServiceDoing中給rootMap添加判斷條件，這樣就能一個(gè)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(shí)現(xiàn)。這四個(gè)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(gè)分界線，此方法之前，rootMap數(shù)據(jù)先進(jìn)入html再進(jìn)入瀏覽器(預(yù)覽)，此方法之后，rootMap數(shù)據(jù)會(huì)再次進(jìn)入html文件，結(jié)束，所以此處可寫(xiě)判斷

4. doServiceEnd : 可有可無(wú)，我還是寫(xiě)上了，萬(wàn)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(lèi)

/**
 * 用戶自定義PDFTag類(lèi)
 * 
 * @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(lèi)必須定義一個(gè)該接口的實(shí)現(xiàn)類(lèi)的成員變量或定義一個(gè)成員變量?jī)?nèi)部類(lèi)，并在setConfigParams方法中調(diào)用使其生效。

子類(lèi)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(lèi)的配置
 * 
 * @author xg君
 * 
 */
public interface PDFConfigurationInterface {
 /**
 * 設(shè)置模板名稱(chēng)
 */
 void configTemplateStr();
 /**
 * 設(shè)置配置的FreemarkereConfigurationBean的名稱(chēng)
 */
 void configFreemarkereConfigurationBeanName();
 /**
 * 設(shè)置生成的html文件名稱(chēng)
 */
 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(lèi)

/**
 * 自定義異常類(lèi)
 * 
 * @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(xiàng)目編號(hào)
 baseInfo.put("prjCode", prjCode);
 // 項(xiàng)目類(lèi)型
 String prjNature = project.getPrjNature();
 baseInfo.put("prjNature", prjNature);
 // 水印名稱(chēng)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(xiàng)目編號(hào)
 String prjNo = project.getPrjNo();
 baseInfo.put("prjNo", prjNo);
 // 項(xiàng)目來(lái)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(xiàng)目類(lèi)別--資助類(lèi)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(xiàng)目名稱(chēng)
 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(xiàng)目類(lèi)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(fèi)"); 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(cè)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(gè)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(xiàng)目立項(xiàng)通知書(shū)";
 } else if (project.getPrjNature().equalsIgnoreCase("2")) {
  // 縱向
  wartermark = "CTGU縱向科研項(xiàng)目立項(xiàng)通知書(shū)";
 }
 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: