java 实现 html 转 pdf(含图片)

逃离我推掉我的手 2022-02-04 08:43 822阅读 0赞

下面有源码地址  
首先在 maven中 引入依赖：

<dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itext-asian</artifactId>
                <version>5.2.0</version>
            </dependency>
            <dependency>
                <groupId>com.itextpdf</groupId>
                <artifactId>itextpdf</artifactId>
                <version>5.4.2</version>
            </dependency>
            <dependency>
                <groupId>org.xhtmlrenderer</groupId>
                <artifactId>core-renderer</artifactId>
                <version>R8</version>
            </dependency>
            <dependency>
                <groupId>org.freemarker</groupId>
                <artifactId>freemarker</artifactId>
                <version>2.3.23</version>
            </dependency>
    
            <dependency>
                <groupId>net.sf.barcode4j</groupId>
                <artifactId>barcode4j-light</artifactId>
                <version>2.0</version>
            </dependency>

然后创建公共类：  
BarcodeUtil：

import java.awt.image.BufferedImage;
    import java.io.ByteArrayOutputStream;
    import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStream;
    import org.krysalis.barcode4j.HumanReadablePlacement;
    import org.krysalis.barcode4j.impl.code39.Code39Bean;
    import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
    import org.krysalis.barcode4j.tools.UnitConv;
    import sun.misc.BASE64Encoder;
    
    /** 
    * @author  作者 : 小布
    * @version 创建时间 : 2019年5月6日 下午2:40:06 
    * @explain 类说明 : 
    */
    public class BarcodeUtil {
        
        public static final String IMG_TYPE_PNG="image/png";
        
        public static final String IMG_TYPE_GIF="image/gif";
        
        public static final String IMG_TYPE_JPEG="image/jpeg";
        
        public static String generateToBase64(String msg,String imgType) throws IOException {
            ByteArrayOutputStream ous = new ByteArrayOutputStream();
            generateToStream(msg,imgType, ous);
            BASE64Encoder encoder = new BASE64Encoder();
            return encoder.encode(ous.toByteArray());
        }
    
        public static File generateToFile(String msg,String imgType, File file)
                throws IOException {
            FileOutputStream out = new FileOutputStream(file);
            try {
                generateToStream(msg,imgType, out);
            } finally {
                if (out != null) {
                    out.close();
                }
            }
            return file;
        }
    
        public static byte[] generateToByte(String msg,String imgType) throws IOException {
            ByteArrayOutputStream out = new ByteArrayOutputStream();
            try {
                generateToStream(msg,imgType, out);
                return out.toByteArray();
            } finally {
                if (out != null) {
                    out.close();
                }
            }
        }
    
        public static void generateToStream(String msg, String imgType,OutputStream out)
                throws IOException {
            if (msg == null || out == null) {
                return;
            }
            Code39Bean bean = new Code39Bean();
            // 精细度
            int dpi = 150;
            // module宽度
            double moduleWidth = UnitConv.in2mm(1.0f / dpi);
            bean.setModuleWidth(moduleWidth);
            // 不显示文字
            bean.setMsgPosition(HumanReadablePlacement.HRP_NONE);
            bean.setHeight(5);
            bean.setWideFactor(3);
            bean.doQuietZone(false);
        
            // 输出到流
            BitmapCanvasProvider canvas = new BitmapCanvasProvider(out, imgType,
                    dpi, BufferedImage.TYPE_BYTE_BINARY, false, 0);
            // 生成条形码
            bean.generateBarcode(canvas, msg);
            // 结束绘制
            canvas.finish();
        }
    
    
    }

FreemarkerTemplate：

import java.io.File;
    import java.io.FileOutputStream;
    import java.io.IOException;
    import java.io.OutputStreamWriter;
    import java.io.StringWriter;
    import java.io.Writer;
    import java.util.HashMap;
    import java.util.Locale;
    import java.util.Map;
    
    import freemarker.template.Configuration;
    import freemarker.template.Template;
    /** 
    * @author  作者 : 小布
    * @version 创建时间 : 2019年5月6日 下午2:40:42 
    * @explain 类说明 : 
    */
    public class FreemarkerTemplate {
    
        private final Configuration configuration = new Configuration(
                Configuration.VERSION_2_3_23);
        private String charset;
    
        public FreemarkerTemplate(String charset) {
            this.charset = charset;
            configuration.setEncoding(Locale.CHINA, charset);
            configuration.setClassicCompatible(true);//处理空值为空字符串  
        }
    
        public void setTemplateClassPath(Class resourceLoaderClass,
                String basePackagePath) {
            configuration.setClassForTemplateLoading(resourceLoaderClass,
                    basePackagePath);
        }
    
        public void setTemplateDirectoryPath(String templatePath)
                throws IOException {
            configuration.setDirectoryForTemplateLoading(new File(templatePath));
        }
    
        public void processToStream(String templateFileName,
                Map<String, Object> dataMap, Writer writer) throws Throwable {
            Template template = configuration.getTemplate(templateFileName);
            template.process(dataMap, writer);
        }
    
        public void processToFile(String templateFileName,
                Map<String, Object> dataMap, File outFile) throws Throwable {
            Writer writer = new OutputStreamWriter(new FileOutputStream(outFile),
                    charset);
            try {
                processToStream(templateFileName, dataMap, writer);
            } catch (Throwable e) {
                e.printStackTrace();
            } finally {
                if (writer != null) {
                    writer.close();
                }
            }
        }
    
        public String processToString(String templateFileName,
                Map<String, Object> dataMap) throws Throwable {
            Writer writer = new StringWriter(2048);
            try {
                processToStream(templateFileName, dataMap, writer);
                return writer.toString();
            } finally {
                if (writer != null) {
                    writer.close();
                }
            }
        }
    
    
    }

PDFUtils：

import java.io.File;
    import java.io.FileOutputStream;
    import java.io.OutputStream;
    
    import org.xhtmlrenderer.pdf.ITextFontResolver;
    import org.xhtmlrenderer.pdf.ITextRenderer;
    
    import com.itextpdf.text.pdf.BaseFont;
    /** 
    * @author  作者 : 小布
    * @version 创建时间 : 2019年5月6日 下午2:41:03 
    * @explain 类说明 : 
    */
    public class PDFUtils {
    	
        private static String fontBasePath=PDFUtils.class.getResource("/").getPath()+"static/font/";
        
        public static void htmlFileToPDFStream(File htmlFile, OutputStream output,
                File imageBaseURL) throws Throwable {
            if (htmlFile == null) {
                throw new RuntimeException("htmlFile is null");
            }
            if (output == null) {
                throw new RuntimeException("output is null");
            }
    
            // 生成ITextRenderer实例
            ITextRenderer renderer = new ITextRenderer();
            // 关联html页面
            renderer.setDocument(htmlFile.toURI().toURL().toString());
            // 设置获取图片的基本路径
            renderer.getSharedContext().setBaseURL(
                    imageBaseURL.toURI().toURL().toString());
            // 设置字体路径，必须和html设置一致
            ITextFontResolver fontResolver = renderer.getFontResolver();
            
            fontResolver.addFont(fontBasePath+"msyh.ttc", BaseFont.IDENTITY_H,
                    BaseFont.NOT_EMBEDDED);
            fontResolver.addFont(fontBasePath+"msyhl.ttc", BaseFont.IDENTITY_H,
                    BaseFont.NOT_EMBEDDED);
            fontResolver.addFont(fontBasePath+"msyhbd.ttc", BaseFont.IDENTITY_H,
                    BaseFont.NOT_EMBEDDED);
            renderer.layout();
            renderer.createPDF(output);
        }
    
        public static void htmlFileToPDFFile(File htmlFile, File pdfFile,
                File imageBaseURL) throws Throwable {
            OutputStream output = new FileOutputStream(pdfFile);
            try {
                htmlFileToPDFStream(htmlFile, output, imageBaseURL);
            } finally {
                if (output != null) {
                    output.close();
                }
            }
        }
    
    }

Receipt：

/** 
    * @author  作者 : 小布
    * @version 创建时间 : 2019年5月6日 下午2:41:24 
    * @explain 类说明 : 
    */
    public class Receipt {
    	
        private String receiptType;
        private double amount;
        
        public String getReceiptType() {
            return receiptType;
        }
        public void setReceiptType(String receiptType) {
            this.receiptType = receiptType;
        }
        public double getAmount() {
            return amount;
        }
        public void setAmount(double amount) {
            this.amount = amount;
        }
        
    }

最后实现的接口代码：

@PostMapping("/apipdf")
        @ApiOperation(value="pdf")
    	public Map<String, Object> apipdf() throws Throwable{
    		Map<String, Object> mp = new HashMap<String, Object>();
    		try {
    			//String barcode = "12345678910";//条形码编号
    	        String htmlBasePath=FastdfsController.class.getResource("/").getPath()+"static/html/HTMLPDF.html";//html的根目录
    	        String tempathBasePath=FastdfsController.class.getResource("/").getPath()+"static/html/";//模板路径
    	        String pdfBasePath="D:\\test\\pdf\\";//生成的pdf目录
    	        
    	        //String barCodePath="D:\\test\\pdf\\"+uuid+".png";
    	        String htmlPath=pdfBasePath+uuid+".html";
    	        String pdfPath=pdfBasePath+uuid+".pdf";
    	        
    	        //生成条形码
    	        //File barCodeFile=new File(barCodePath);
    	        //BarcodeUtil.generateToFile(barcode,BarcodeUtil.IMG_TYPE_PNG,barCodeFile);
    	        //生成html
    	        FreemarkerTemplate tp=new FreemarkerTemplate("UTF-8");
    	        tp.setTemplateDirectoryPath(tempathBasePath);
    	        //封装数据 start ，必须是Map
    	        Map<String, Object> dataMap = new HashMap<String, Object>();
    	        //dataMap.put("barcodeImg",barCodePath);//条形码
    	        dataMap.put("barcode","file:imgurl");//一定要加file:
    	        dataMap.put("name", "张三");
    	        dataMap.put("sex", "不明");
    	        dataMap.put("age", "18");
    	        File htmlFile=new File(htmlPath);
    	        tp.processToFile("HTMLPDF.html", dataMap,htmlFile);
    	        //生成pdf
    	        PDFUtils.htmlFileToPDFFile(htmlFile, new File(pdfPath), new File(htmlBasePath));
    	        mp.put("msg", 200);
    		} catch (Exception e) {
    			mp.put("msg", 500);
    		}
    		return mp;
    	}

[git源码地址][git]  
[源码百度网盘地址][Link 1]  
提取码：e1n6

在此提供几个宋体文件：  
[宋体网盘地址][Link 2]  
提取码：yefy

[git]: https://github.com/mars0520/java-pdf
[Link 1]: https://pan.baidu.com/s/15-w3pw-Tsit2zyGnUXVUwA
[Link 2]: https://pan.baidu.com/s/1hASKGLsX8I2jdWoRBRfYmQ