使用IText5+Freemarker生成PDF(模板可以使用CCS3分页效果)

男娘i 2023-06-08 06:43 52阅读 0赞

### iText介绍 ###

iText是著名的开放源码的站点sourceforge一个项目，是用于生成PDF文档的一个java类库。通过iText不仅可以生成PDF或rtf的文档，而且可以将XML、Html文件转化为PDF文件。iText5是目前比较主流使用的因为免费，iText7是更好但收费的，所以这里我们还是乖乖使用5吧！！

项目要使用iText，必须引入jar包。才能使用，maven依赖如下：

<dependency>
    		  <groupId>com.itextpdf</groupId>
    		  <artifactId>itextpdf</artifactId>
    		  <version>5.5.11</version>
    		</dependency>
    		
    		<dependency>
    		  <groupId>com.itextpdf.tool</groupId>
    		  <artifactId>xmlworker</artifactId>
    		  <version>5.5.11</version>
    		</dependency>
    
    		 <dependency>
                <groupId>org.xhtmlrenderer</groupId>
                <artifactId>flying-saucer-pdf</artifactId>
                <version>9.1.6</version>
            </dependency>

其中

（1）com.itextpdf是必须的。

（2）com.itextpdf.tool是为了Freemarker的模板。

（3）org.xhtmlrenderer是为模板可以使用css3。

IText如果使用的字体是需要我们配置的，这个方式很好，我们可以引用主流或者自己喜欢的字体

![20191017141705116.png][]

网上都可以下载找到的，如果懒可以去这里下载【字体】

然后我们先来热热身

建立一个简单的pdf

import com.itextpdf.text.Document;
    import com.itextpdf.text.DocumentException;
    import com.itextpdf.text.pdf.PdfWriter;
    import com.itextpdf.tool.xml.XMLWorkerFontProvider;
    import com.itextpdf.tool.xml.XMLWorkerHelper;
     
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.nio.charset.Charset;
    
    public class JavaToPdfHtml {
    
    
        private static final String DEST = "D:/pdf/template.pdf";//输出地址
        private static final String HTML = "D:/pdf/template.html";
        private static final String FONT = "D:/pdf/simhei.ttf";
      
      
        public static void main(String[] args) throws IOException, DocumentException {
            // step 1
            Document document = new Document();
            // step 2
            PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(DEST));
            // step 3
            document.open();
            // step 4
            XMLWorkerFontProvider fontImp = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
            fontImp.register(FONT);
            XMLWorkerHelper.getInstance().parseXHtml(writer, document,
                    new FileInputStream(HTML), null, Charset.forName("UTF-8"), fontImp);
            // step 5
            document.close();
        }
        
       
    }

template.html

<!DOCTYPE html>
    <html lang="en">
    <head>
    <meta charset="UTF-8" />
    <title>Title</title>
    <style>
    body {
    	font-family: SimHei;
    }
    
    .red {
    	color: red;
    }
    </style>
    </head>
    <body>
    
    	<div class="red">hello world!</div>
    	<div class="red">你好，祖克</div>
    </body>
    </html>

效果：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70][]

好，然后我们再来加上Freemarker

package com.jy.pdf;
    
    import com.itextpdf.text.Document;
    import com.itextpdf.text.DocumentException;
    import com.itextpdf.text.pdf.PdfWriter;
    import com.itextpdf.tool.xml.XMLWorkerFontProvider;
    import com.itextpdf.tool.xml.XMLWorkerHelper;
    
    import freemarker.template.Configuration;
    import freemarker.template.Template;
      
    import java.io.ByteArrayInputStream;
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.StringWriter;
    import java.io.Writer;
    import java.nio.charset.Charset;
    import java.util.HashMap;
    import java.util.Map;
    
    public class JavaToPdfHtmlFreeMarker {
    	
    	  	private static final String DEST = "D:/pdf/templateF.pdf";
    	  	
    	    private static final String FTL = "D:/pdf/";
    	  	
    	  
    	    private static final String HTML = "templateF.html";
    	    
    	    private static final String FONT = "D:/pdf/simhei.ttf";
    	  
    	    private static Configuration freemarkerCfg = null;
    	  
    	    static {
    	        freemarkerCfg =new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
    	        //freemarker的模板目录
    	        try {
    	        	//freemarkerCfg.
    	           freemarkerCfg.setDirectoryForTemplateLoading(new File(FTL));
    	        } catch (Exception e) {
    	            e.printStackTrace();
    	        }
    	    }
    	  
    	  
    
    	  
    	  
    	    public static void createPdf(String content,String dest) throws IOException, DocumentException {
    	        // step 1
    	        Document document = new Document();
    	        // step 2
    	        PdfWriter writer = PdfWriter.getInstance(document, new FileOutputStream(dest));
    	        // step 3
    	        document.open();
    	        // step 4
    	        XMLWorkerFontProvider fontImp = new XMLWorkerFontProvider(XMLWorkerFontProvider.DONTLOOKFORFONTS);
    	        fontImp.register(FONT);
    	        XMLWorkerHelper.getInstance().parseXHtml(writer, document,
    	                new ByteArrayInputStream(content.getBytes()), null, Charset.forName("UTF-8"), fontImp);
    	        // step 5
    	        document.close();
    	  
    	    }
    	  
    	    /**
    	     * freemarker渲染html
    	     */
    	    public static String freeMarkerRender(Map<String, Object> data, String htmlTmp) {
    	        Writer out = new StringWriter();
    	        try {
    	            // 获取模板,并设置编码方式
    	            Template template = freemarkerCfg.getTemplate(htmlTmp);
    	            template.setEncoding("UTF-8");
    	            // 合并数据模型与模板
    	            template.process(data, out); //将合并后的数据和模板写入到流中，这里使用的字符流
    	            out.flush();
    	            return out.toString();
    	        } catch (Exception e) {
    	            e.printStackTrace();
    	        } finally {
    	            try {
    	                out.close();
    	            } catch (IOException ex) {
    	                ex.printStackTrace();
    	            }
    	        }
    	        return null;
    	    }
    	    
    	    public static void main(String[] args) throws IOException, DocumentException {
    	        Map<String,Object> data = new HashMap();
    	        data.put("name","路飛.祖克");
    	        String content = JavaToPdfHtmlFreeMarker.freeMarkerRender(data,HTML);
    	        JavaToPdfHtmlFreeMarker.createPdf(content,DEST);
    	    }
    }

templateF.html

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70 1][]

加入ccs3，图片使用64位即可

package com.jy.pdf;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.InputStream;
    import java.io.StringWriter;
    import java.io.Writer;
    import java.util.HashMap;
    import java.util.Map;
    
    import org.apache.commons.codec.binary.Base64;
    import org.xhtmlrenderer.pdf.ITextFontResolver;
    import org.xhtmlrenderer.pdf.ITextRenderer;
    
    import com.itextpdf.text.DocumentException;
    import com.itextpdf.text.pdf.BaseFont;
    
    import freemarker.template.Configuration;
    import freemarker.template.Template;
    public class JavaToPdfHtmlFreeMarkerCss {
    
    
    	
      	private static final String DEST = "D:/pdf/templateFCss.pdf";	
        private static final String FTL = "D:/pdf/";	
        private static final String HTML = "templateFCss.html";
        private static final String FONT = "D:/pdf//simhei.ttf";
        private static final String FONT_C = "D:/pdf//calibri.ttf";
        private static final String FONT_S = "D:/pdf//simsun.ttc";
        
        private static final String LOGO_PATH = "D:/pdf/logo.jpg";
        
        private static Configuration freemarkerCfg = null;
      
        static {
        	 freemarkerCfg =new Configuration(Configuration.DEFAULT_INCOMPATIBLE_IMPROVEMENTS);
            //freemarker的模板目录
            try {
                freemarkerCfg.setDirectoryForTemplateLoading(new File(FTL));
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
      
        public static void main(String[] args) throws IOException, DocumentException, com.lowagie.text.DocumentException {
            Map<String,Object> data = new HashMap<String,Object>();
            data.put("name","路奇.D.艾尼路 儸傑");
            File file=new File(LOGO_PATH);
            data.put("fileType","image/jpeg");
            data.put("file64Str",fileToBase64Str(file));
            String content =freeMarkerRender(data,HTML);
            //System.out.println(content);
            createPdf(content,DEST);
    
        }
      
        /**
         * freemarker渲染html
         */
        public static String freeMarkerRender(Map<String, Object> data, String htmlTmp) {
            Writer out = new StringWriter();
            try {
                // 获取模板,并设置编码方式
                Template template = freemarkerCfg.getTemplate(htmlTmp);
                template.setEncoding("UTF-8");
                // 合并数据模型与模板
                template.process(data, out); //将合并后的数据和模板写入到流中，这里使用的字符流
                out.flush();
                return out.toString();
            } catch (Exception e) {
                e.printStackTrace();
            } finally {
                try {
                    out.close();
                } catch (IOException ex) {
                    ex.printStackTrace();
                }
            }
            return null;
        }
      
        public static void createPdf(String content,String dest) throws IOException, DocumentException, com.lowagie.text.DocumentException {
            ITextRenderer render = new ITextRenderer();
            
            //设置字体
            ITextFontResolver fontResolver = render.getFontResolver();
            fontResolver.addFont(FONT_S, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            fontResolver.addFont(FONT, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            fontResolver.addFont(FONT_C, BaseFont.IDENTITY_H, BaseFont.EMBEDDED);
            // 解析html生成pdf
            render.setDocumentFromString(content);
            render.layout();
            render.createPDF(new FileOutputStream(dest));
            render.finishPDF();
        }
    	
        
    	/**
    	 * File to 64bit Str
    	 * 
    	 * @param file
    	 * @return
    	 */
    	public static String fileToBase64Str(File file) {
    		byte[] data = null;
    		InputStream inputStream = null;
    		if (file != null) {
    			try {
    				inputStream = new FileInputStream(file);
    				data = new byte[inputStream.available()];
    				inputStream.read(data);
    			} catch (Exception e) {
    				e.printStackTrace();
    			} finally {
    				try {
    					inputStream.close();
    				} catch (IOException e) {
    					e.printStackTrace();
    				}
    			}
    			return Base64.encodeBase64String(data);
    		}
    		return null;
    	}
    }

templateFCss.html

效果，加上ccs3，就可以有分页的效果了

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70 2][]

是不是很棒

PS：上次有同学分页有些东西会被隔开怎么办

CCS可以幫到你page-break-inside:avoid;這個是可以避免分頁的

測試template

<!DOCTYPE html>
    <html lang="en">
    <head>
        <meta charset="UTF-8"/>
        <title>Title</title>
        <style>
            body{
                font-family:SimHei;
            }
            .color{
                color: green;
            }
            .pos{
                position:absolute;
                left:200px;
                top:5px;
                width: 200px;
                font-size: 10px;
            }
             @media print {
                div.header-right {
                    display: block;
                    position: running(header-right);
                }
                
               img{page-break-inside:avoid;}
               table{page-break-inside:avoid;}
            }
             @page {
                size: 8.5in 11in;
    
                @top-right {
                    content: element(header-right)
                };
    
                /*@bottom-center {
                    content : "Page " counter(page) " of " counter(pages);
                };	 */
                @bottom-center {
                    content: element(footer)
                }
            }
            
            #footer {
                position: running(footer);
            }
                
            #pages:before {
                content: counter(page);
            }
    
            #pages:after {
                content: counter(pages);
            }
            
        </style>
    </head>
    <body>
    
      <div id="footer">
            <div style="text-align: center; width: 100%;font-size: 15px;">Page <span id="pages"> of </span></div>
        </div>
    	<div class="page">
    		<div class="color">你好，${name}222</div>
    		<img src="data:${fileType};base64,${file64Str}" width="600px" />
    		<table border="1">
    			<tr>
    				<th>Month</th>
    				<th>Savings</th>			
    			</tr>
    			<tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr>
    			<tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr>
    			<tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr><tr>
    				<td>January</td>
    				<td>$100</td>
    			</tr>
    		</table>
    	</div>
    
    
    </body>
    </html>

效果

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70 3][]

[20191017141705116.png]: /images/20230531/1c4f8e247d0c412e989c1c0645046ee9.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70]: /images/20230531/c71948b3eb0642e288fa16d0700fda2a.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70 1]: /images/20230531/3ed6a062a3fd41569b5144eb4c374596.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70 2]: /images/20230531/55f0ef0321654a63b7c20919fda5d2c6.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2hqN2pheQ_size_16_color_FFFFFF_t_70 3]: /images/20230531/550fdfa885474a83be9372cf9b0188df.png