java原装代码完成pdf在线预览和pdf打印及下载

 /** * 通用的生成pdf预览和生成打印的html文件 *  * @author xg君 *  */public abstract class PDFTag extends BodyTagSupport { private static final long serialVersionUID = 1L; // 标签属性变量 private String json = ""; private String tempDir = ""; // 非标签属性变量 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不能为空!");  } catch (CstuException e) {  e.printStackTrace();  } } Configuration cptFreemarkereConfiguration = (Configuration) application  .getBean(freemarkereConfigurationBeanName); try {  if (templateStr == null) {  throw new CstuException("模板文件不能为空!");  }  Template template = cptFreemarkereConfiguration.getTemplate(templateStr);  if (basePath == null) {  throw new CstuException("文件的基本路径(父路径)不能为空!");  }  File htmlPath = new File(tempDir + File.separator + basePath);  if (!htmlPath.exists()) {  htmlPath.mkdirs();  }  if (fileName == null) {  throw new CstuException("生成的html文件名不能为空!");  }  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();  // 显示在页面  template.process(rootMap, pageContext.getResponse().getWriter()); } catch (Exception e) {  e.printStackTrace(); } doServiceEnd(); return SKIP_BODY; } /** * 配置基础参数，如 */ public abstract void setConfigParams(); /** * 业务处理方法-开始 填充数据 *  * @return */ public abstract void doServiceStart(); /** * 业务处理方法-执行中 备用，可空实现，若rootMap中存在双份数据则可在此处填充判断条件 *  * @return */ public abstract void doServiceDoing(); /** * 业务处理方法-结束 清空rootMap并调用垃圾回收，也可空实现 *  * @return */ public abstract void doServiceEnd(); /** * 将元素放入rootMap中 */ public void putKV(String key, Object value) { rootMap.put(key, value); } /** * 将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; }}

/** * 用户自定义PDFTag类 *  * @author xg君 *  */public class ViewPDFTag extends PDFTag { private static final long serialVersionUID = 4528567203497016087L; private String prjNature = ""; private String bookName = ""; private String prjCode = ""; /** * 用户自定义的配置参数 */ public PDFConfigurationInterface pDFConfigurationInterface = new PDFConfigurationInterface() { @Override public void configTemplateStr() {  // 横,纵向  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() {  // 默认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(); }}

/** * PdfTag类的配置 *  * @author xg君 *  */public interface PDFConfigurationInterface { /** * 设置模板名称 */ void configTemplateStr(); /** * 设置配置的FreemarkereConfigurationBean的名称 */ void configFreemarkereConfigurationBeanName(); /** * 设置生成的html文件名称 */ void configFileName(); /** * 设置生成的html文件的基本路径(父目录) */ void configBasePath(); /** * 设置文件编码，默认utf-8 */ void configFileEncoding();}

/** * 自定义异常类 *  * @author Administrator *  */public class CstuException extends Exception { private static final long serialVersionUID = 4266461814747405870L; public CstuException(String msg) { super(msg); }}

<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>

/** * 处理PDF导出 *  */@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); // 项目编号 baseInfo.put("prjCode", prjCode); // 项目类型 String prjNature = project.getPrjNature(); baseInfo.put("prjNature", prjNature); // 水印名称格式:watermark+"-"+prjNature baseInfo.put("waterMarkImg", waterMarkImgDir + File.separator + "watermark-" + prjNature + ".png"); // 负责人 Person person = personService.getPerson(project.getPsnCode()); String zhName = person.getZhName(); baseInfo.put("zhName", addStr(9, "<br/>", zhName)); // 项目编号 String prjNo = project.getPrjNo(); baseInfo.put("prjNo", prjNo); // 项目来源 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); // 项目类别--资助类别 String grantName = project.getGrantName(); baseInfo.put("grantName", addStr(9, "<br/>", grantName)); // 合同金额 String totalAmt = project.getTotalAmt().toString(); BigDecimal totalAmt_ = checkNumber(totalAmt); baseInfo.put("totalAmt", totalAmt_.toString()); // 项目名称 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 = ""; // 判断项目类型 Map<String, Object> itemMap = new HashMap<String, Object>(); if (prjNature.equalsIgnoreCase("1")) {  bookName = "第一份合同";  // 获取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", "差旅费"); 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());  // 检测金额规范  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; } /** * 为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(); } /** * 两个数字/英文 *  * @param str * @param num * @return 最终索引 */ public static int getEndIndex(String str, double num) { int idx = 0; int count = 0; double val = 0.00; // 判断是否是英文/数字 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; } /** * 下载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")) {  // 横向  wartermark = "CTGU横向科研项目立项通知书"; } else if (project.getPrjNature().equalsIgnoreCase("2")) {  // 纵向  wartermark = "CTGU纵向科研项目立项通知书"; } 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();  }  } } // 清理残留文件 // 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) { // 初始化为6位小数 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);// 在内容上方加水印  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(); } }}

<?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>打印预览</title> <meta http-equiv="Content-Type" content="text/html;charset=UTF-8" />......</head><body></body></html>