java使用itext操作填充pdf模板，（根据一个模板生成多页数据）
直接开始需要两个jar包 itext-asian-5.2.0.jar和 itextpdf-5.5.6.jar ，我的业务逻辑可能比较复杂，在这里我就简单的提供一个demo ，需要的人自己按照自己的业务逻辑来改。
首先我们要用 Adobe Acrobat 来编辑pdf
简单讲讲思路
1 .读取到要填充的pdf 地址
2. 然后转成PdfReader对象，代表一个pdf
3. 然后转成PdfStamper
4. 获取到 AcroFields s = ps.getAcroFields();
5. 填充 s.setField(“表单里面你写的值” , 具体的要填充的数据);
6. 然后把pdf放到 PdfReader里面，然后多个PdfReader直接往list里面放就完事了
7. 合并成一个pdf，（可能多页）
然后
对，没有错你得把这些表单全部填满，这些就是需要替换的地方，当然你可以根据你的业务需求来填写，但是这个名字需要在代码中用到。
代码开始 ：
//我自己的数据源
final List rows = pa.getRows();
//每一条数据代表一个pdf表格
List<PdfReader> list = new ArrayList();
try {
PdfStamper sd = null;
//记录行 ！我的业务需求
int NO = 1;
//页码 ！我的 业务需求
int page = 1;
//不确定数据有多少，所以要无限循环
while (true) {
String realPath = request.getSession().getServletContext().getRealPath("/");//项目路径
//使用微软雅黑字体显示中文
BaseFont chinessFont = BaseFont.createFont("STSongStd-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
PdfReader reader = new PdfReader(realPath + "/Template/receiveMoney.pdf");//读取
ByteArrayOutputStream bos = new ByteArrayOutputStream();
PdfReader pdfReader = null;
//因为一页有25条数据
if (rows.size() > 26) {
//回去填充pdf的对象
PdfStamper ps = new PdfStamper(reader, bos);
AcroFields s = ps.getAcroFields();
for (int j = 0; j < 25; j++) {
int k = j + 1;
s.setField("NO" + k, NO + "");
BasicDBObject basicDBObject2 = (BasicDBObject) rows.get(0);
if (basicDBObject2.get("SN") != null) {
**//仔细看这里，具体填充**
s.setField("SN" + k, basicDBObject2.get("SN").toString());
}
if (basicDBObject2.get("CompanyName") != null) {
s.setFieldProperty("CompanyName" + k, "textfont", chinessFont, null); //设置中文格式
s.setField("CompanyName" + k, basicDBObject2.get("CompanyName").toString());
}
if (basicDBObject2.get("VATReward") != null) {
s.setField("VATReward" + k, basicDBObject2.get("VATReward").toString());
}
if (basicDBObject2.get("BusinessTaxReward") != null) {
s.setField("BusinessTaxReward" + k, basicDBObject2.get("BusinessTaxReward").toString());
}
if (basicDBObject2.get("BIncomeTaxReward") != null) {
s.setField("BIncomeTaxReward" + k, basicDBObject2.get("BIncomeTaxReward").toString());
}
if (basicDBObject2.get("PIncomeTaxReward") != null) {
s.setField("PIncomeTaxReward" + k, basicDBObject2.get("PIncomeTaxReward").toString());
}
if (basicDBObject2.get("ChangeTaxReward") != null) {
s.setField("ChangeTaxReward" + k, basicDBObject2.get("ChangeTaxReward").toString());
}
if (basicDBObject2.get("Totals") != null) {
s.setField("Totals" + k, basicDBObject2.get("Totals").toString());
}
if (basicDBObject2.get("WithholdTotal") != null) {
s.setField("WithholdTotal" + k, basicDBObject2.get("WithholdTotal").toString());
}
//TODO 扣除预付款及代扣费
/* if(basicDBObject2.get("SN")!=null){
s.setField("SN"+j, basicDBObject2.get("SN").toString());
}*/
if (basicDBObject2.get("SupportAmount") != null) {
s.setField("SupportAmount" + k, basicDBObject2.get("SupportAmount").toString());
}
NO++;
rows.remove(0);
}
BasicDBObject object = (BasicDBObject) rows.get(0);
Object startHandleDate = object.get("StartHandleDate");
if (startHandleDate != null && !startHandleDate.toString().equals("")) {
String[] split = startHandleDate.toString().split("-");
String s1 = split[0] + split[1];
int days = QzUtil.getDays(Integer.parseInt(split[0]), Integer.parseInt(split[1]));
s.setField("ReceiveData", split[0] + split[1] + "01" + "～" + s1 + days + "");
}
s.setField("User", getSessionUser().getUsername());
s.setField("CrrentData", DateUtil.getDay());
s.setField("Page", page + "");
page++;
ps.close();
pdfReader = new PdfReader(bos.toByteArray());
list.add(pdfReader);
//没到25条的
} else {
PdfStamper ps = new PdfStamper(reader, bos);
AcroFields s = ps.getAcroFields();
for (int j = 0; j < rows.size(); j++) {
//填充模板pdf
int k = j + 1;
s.setField("NO" + k, NO + "");
BasicDBObject basicDBObject2 = (BasicDBObject) rows.get(j);
if (basicDBObject2.get("SN") != null) {
s.setField("SN" + k, basicDBObject2.get("SN").toString());
}
if (basicDBObject2.get("CompanyName") != null) {
s.setFieldProperty("CompanyName" + k, "textfont", chinessFont, null); //设置中文格式
s.setField("CompanyName" + k, basicDBObject2.get("CompanyName").toString());
}
if (basicDBObject2.get("VATReward") != null) {
s.setField("VATReward" + k, basicDBObject2.get("VATReward").toString());
}
if (basicDBObject2.get("BusinessTaxReward") != null) {
s.setField("BusinessTaxReward" + k, basicDBObject2.get("BusinessTaxReward").toString());
}
if (basicDBObject2.get("BIncomeTaxReward") != null) {
s.setField("BIncomeTaxReward" + k, basicDBObject2.get("BIncomeTaxReward").toString());
}
if (basicDBObject2.get("PIncomeTaxReward") != null) {
s.setField("PIncomeTaxReward" + k, basicDBObject2.get("PIncomeTaxReward").toString());
}
if (basicDBObject2.get("ChangeTaxReward") != null) {
s.setField("ChangeTaxReward" + k, basicDBObject2.get("ChangeTaxReward").toString());
}
if (basicDBObject2.get("Totals") != null) {
s.setField("Totals" + k, basicDBObject2.get("Totals").toString());
}
if (basicDBObject2.get("WithholdTotal") != null) {
s.setField("WithholdTotal" + k, basicDBObject2.get("WithholdTotal").toString());
}
if (basicDBObject2.get("SupportAmount") != null) {
s.setField("SupportAmount" + k, basicDBObject2.get("SupportAmount").toString());
}
NO++;
}
BasicDBObject object = (BasicDBObject) rows.get(0);
Object startHandleDate = object.get("StartHandleDate");
if (startHandleDate != null && !startHandleDate.toString().equals("")) {
String[] split = startHandleDate.toString().split("-");
String s1 = split[0] + split[1];
int days = QzUtil.getDays(Integer.parseInt(split[0]), Integer.parseInt(split[1]));
s.setField("ReceiveData", split[0] + split[1] + "01" + "～" + s1 + days + "");
}
s.setField("User", getSessionUser().getUsername());
s.setField("CrrentData", DateUtil.getDay());
s.setField("Page", page + "");
page++;
ps.close();
pdfReader = new PdfReader(bos.toByteArray());
list.add(pdfReader);
// sd = new PdfStamper(pdfReader, response.getOutputStream());
break;
}
}
//上面已经获得了pdf的每一页，这里我只需要合并成为一个pdf，然后返回
Document document = new Document();
PdfCopy copy = new PdfCopy(document, response.getOutputStream());
document.open();
for (int k = 0; k < list.size(); k++) {
PdfReader pdfReader = list.get(k);
document.newPage();
copy.addDocument(pdfReader);
}
copy.close();
} catch (Exception e) {
e.printStackTrace();
}
对了返回的格式要加下
@RequestMapping(value = "/queryReceiveMoneyePrint.do", produces = "application/pdf;charset=UTF-8")
页面
<object type="application/pdf" data="" id="review" data=“这里写后台方法地址” style="width:1100px; height:1000px; "> </object>
代码质量有点差，大家凑合看。不懂的直接评论