itext操作表单域导出PDF，俗称抠模板

/**
 * templateUrl 模板文件路径,包含文件名
 * targetUrl   目标路径
 * dateMap     填充数据
 */
public class CreatePdfUtil {
    public static String createAllPdf(String templateUrl,String targetUrl,HashMap dataMap) throws Exception {
        //填充创建pdf
        PdfReader reader = null;
        PdfStamper stamp = null;
        String times = "";
        try {
            reader = new PdfReader(templateUrl);

            SimpleDateFormat simp = new SimpleDateFormat("yyyyMMdd");
            times = simp.format(new Date()).trim();
            times+=UUIDUtil.getUUID();
            times = times;
            //创建生成报告名称
            String root = targetUrl;
            if (!new File(root).exists())
                new File(root).mkdirs();
            File deskFile = new File(root, times + ".pdf");
            stamp = new PdfStamper(reader, new FileOutputStream(deskFile));
            PdfWriter writer = stamp.getWriter();
            TextField  field = new TextField(writer, new Rectangle(200, 200, 400, 300), "field1");
            field.setOptions(TextField.MULTILINE);
            //取出报表模板中的所有字段
            AcroFields form = stamp.getAcroFields();
            // 填充数据
            transformRegular(form,dataMap);
            stamp.setFormFlattening(true);
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            if (stamp != null) {
                stamp.close();
            }
            if (reader != null) {
                reader.close();
            }
        }
        return times;
    }

/**
          * 填充规整的表单域
          *
          * @param form
          */
    public static void transformRegular(AcroFields form, HashMap dataMap) throws IOException, DocumentException {
        if (dataMap == null || dataMap.size() == 0) {
            return;
        }
        // 设置中文显示
        BaseFont bfChinese = BaseFont.createFont( "STSong-Light", "UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);
        String key = "";
　　　　//注意，设置中文使用下面的方法，form.setFieldProperty(key,"textfont",bfChinese,null)这种方法没作用

        form.addSubstitutionFont(bfChinese);
        Iterator ekey = dataMap.keySet().iterator();
        Object obj = null ;
        while (ekey.hasNext()) {
            key = ekey.next().toString();
            try {
                obj = dataMap.get(key);
                //非空放入
                if( dataMap.get(key) != null) {

　　　　　　　　　　　　//form.setFieldProperty(key,"textfont",bfChinese,null)；

                    form.setField(key, dataMap.get(key).toString());
                }
            } catch (IOException e) {
                e.printStackTrace();
            } catch (DocumentException e) {
                e.printStackTrace();
            }
        }
    }
依赖---------

<dependency>
   <groupId>com.itextpdf</groupId>
   <artifactId>itextpdf</artifactId>
   <version>5.5.10</version>
</dependency>
<dependency>
   <groupId>com.itextpdf</groupId>
   <artifactId>itext-asian</artifactId>
   <version>5.2.0</version>
</dependency>
注：如果填充时字数太多想要换行，则需在PDF模板里面直接对文本域的样式进行设置，选择允许多行即可。