dom4j实现用已有的PDF模板+xml，生成新的PDF

应用场景

在已经有了PDF模板，只需要我们动态填充一下数据的情况下，例如PDF报表，发票等

需要的jar包

 还要准备一个PDF模板，和xml

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<FormDefine xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
	<Config>
	
	  <Filed name="Name" >
			<Page>1</Page>
			<X>78</X>
			<Y>650</Y>
			<Font>楷体gb2312</Font>
			<Size>20</Size>
			
		</Filed>
		
		<Filed name="Bank" >
			<Page>1</Page>
			<X>245</X>
			<Y>650</Y>
			<Font>楷体gb2312</Font>
			<Size>20</Size>
		
		</Filed>
		
		<Filed name="CityName">
			<Page>1</Page>
			<X>445</X>
			<Y>650</Y>
			<Font>楷体gb2312</Font>
			<Size>20</Size>
		</Filed>
	</Config>
</FormDefine>

　接下来直接上Java代码

public void makePdf(String xmlPath, String pdfPath, String resultPath, HashMap<String, String> map)
            throws DocumentException, IOException, Exception {
        PdfReader pdfReader = null;
        PdfStamper pdfStamper = null;
        FileOutputStream fileOutputStream = null;
        SAXReader saxReader = new SAXReader();
        if (!this.makedir(resultPath)) {
            System.out.println("创建目录失败");
        } else {
            File xmlfile = new File(xmlPath);
            // dom4j读取xml文件得到根元素
            Element rootElement = saxReader.read(xmlfile).getRootElement();
            // 以文件流形式输入PDF文件
            FileInputStream in = new FileInputStream(pdfPath);
            fileOutputStream = new FileOutputStream(resultPath);
            
            pdfReader = new PdfReader(in);
            pdfStamper = new PdfStamper(pdfReader, fileOutputStream);
           // "Config"xml二級標簽，返回一個迭代器
            for ( Iterator it = this.getElementIterator(rootElement, "Config"); it.hasNext();) {
                Element element = (Element) it.next();
                Attribute attributeName = element.attribute("name");
              
                String name = "";
                if (attributeName != null) {
                     name = attributeName.getValue();
                }
                
                String value = "";
                if (map.containsKey(name)) {
                    value = (String) map.get(name);
                }  else {
                    continue;
                }
                // 獲取node節點個數
                int count = element.nodeCount();
                System.out.println(count+"=======");
                int page = 0;
                float x = 0;
                float y = 0;
                String font = "";
                int size = 0;
                for (int j = 0; j < count; j++) {
                    Node node = element.node(j);
                    // 對比該節點是不是一個元素
                    if (node instanceof Element) {
                        if (node.getName().equals("Page"))
                            page = Integer.parseInt(node.getText());
                        if (node.getName().equals("X"))
                            x = Float.parseFloat(node.getText());
                        if (node.getName().equals("Y"))
                            y = Float.parseFloat(node.getText());
                        if (node.getName().equals("Font"))
                            font = node.getText();
                        if (node.getName().equals("Size"))
                            size = Integer.parseInt(node.getText());
                    }
                      
                }
                PdfContentByte over;
                over = pdfStamper.getOverContent(page);
                over.beginText();
                BaseFont bfChinese=this.getBaseFont(font);
                over.setFontAndSize(bfChinese, size);
                over.setColorFill(Color.blue);
                /**
                 * 參數説明
                 * 左、右、居中(ALIGN_CENTER, ALIGN_RIGHT or ALIGN_LEFT)
                 * 要输出的文本
                 * 文本输入的X坐标
                 * 文本输入的Y坐标
                 * 文本的旋转角度
                 */
                over.showTextAligned(PdfContentByte.ALIGN_LEFT, value, x, y, 0);
                over.endText();
                System.out.println("結束=====");
            }
            if(pdfReader!=null){
                try{
                    pdfReader.close();
                }catch(Exception e){
                    e.printStackTrace();
                }
            }
            if (pdfStamper != null) {
                try {
                    pdfStamper.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
            if (fileOutputStream != null) {
                try {
                    fileOutputStream.close();
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        }
    }
    private BaseFont getBaseFont(String font) throws com.lowagie.text.DocumentException, IOException {
       
        if("楷体gb2312".equalsIgnoreCase(font)){
            BaseFont bfChinese = BaseFont.createFont("C:/Users/qinda/Desktop/Excel/pdf/test/simkaiGBK.ttf",
                    BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);
            return bfChinese;
        }
        		return null;
    }

    public static boolean makedir(String resultPath) {
      
       try {
           File file = new File(resultPath);
           if(!file.exists()) {
               System.out.println("目录创建成功。。。。。。。。。。");
               file.createNewFile();
           }else {
               System.out.println("目录已存在");
           }
        
    } catch (Exception e) {
      return false;
    }
    return true;
    }  
    
    public static Iterator<Element> getElementIterator(Element rootElement,String elementName){
       Iterator<Element> iterator = null;
       for(Iterator<Element> it = rootElement.elementIterator();it.hasNext();) {
           Element element = it.next();
           if(element.getName().equals(elementName)) {
               iterator = element.elementIterator();
           }
       }
       return  iterator;
    }
}

　　测试代码

  public static void main(String[] args) throws DocumentException, IOException, Exception {
        String resultPath ="C:/Users/qinda/Desktop/Excel/pdf/test/結果.pdf";
        String pdfPath = "C:\Users\qinda\Desktop\pdf\模板.pdf";
        String xmlPath = "C:\Users\qinda\Desktop\pdf\aa.xml";
        HashMap<String,String> map = new HashMap<>();
        map.put("Name", "12345667");
        map.put("CityName", "北京");
        map.put("Bank", "12345667");
        MakePdf makePdf = new MakePdf();
        // map是要插入的數據
        makePdf.makePdf(xmlPath, pdfPath, resultPath,map);
        
    }　　

　说明下：需要填充的数据用xml中的<X> <Y>的标签来调整位置。end。。。。。。。。。。。。。。。。