flying-sauser html to pdf

Flying-Saucer html 生成pdf 思路

1、编写ftl模板

2、使用freemarker生成html

3、根据生成的html在生成PD

项目依赖

<dependency><groupId>org.xhtmlrenderer</groupId><artifactId>flying-saucer-pdf-itext5</artifactId><version>9.1.6</version></dependency><dependency><groupId>org.freemarker</groupId><artifactId>freemarker</artifactId></dependency><dependency><groupId>com.itextpdf</groupId><artifactId>itextpdf</artifactId><version>5.5.11</version></dependency><dependency><groupId>com.itextpdf</groupId>    <artifactId>itext-asian</artifactId>    <version>5.2.0</version></dependency>

以下是实现类

PDF生成辅助类

import java.io.File;import java.io.IOException;import java.io.StringWriter;import javax.servlet.http.HttpServletRequest;import org.springframework.web.context.request.RequestContextHolder;import org.springframework.web.context.request.ServletRequestAttributes;import org.xhtmlrenderer.pdf.ITextRenderer;import com.itextpdf.text.DocumentException;import com.itextpdf.text.pdf.BaseFont;import freemarker.core.ParseException;import freemarker.template.Configuration;import freemarker.template.MalformedTemplateNameException;import freemarker.template.Template;import freemarker.template.TemplateException;import freemarker.template.TemplateNotFoundException;/** * PDF生成辅助类 */@SuppressWarnings("deprecation")public class PdfHelper {private static Configuration freemarkerCfg = null;static{try{HttpServletRequest request = ((ServletRequestAttributes)RequestContextHolder.getRequestAttributes()).getRequest();    String path = request.getSession().getServletContext().getRealPath("").replaceAll("\\\\", "/") + "/flyingsauser/";    freemarkerCfg = new Configuration();freemarkerCfg.setDirectoryForTemplateLoading(new File(path));freemarkerCfg.setDefaultEncoding("UTF-8");}catch (Exception e) {e.printStackTrace();}};    public static ITextRenderer getRender(String ftlPath) throws DocumentException, IOException {        ITextRenderer render = new ITextRenderer();        //添加字体，以支持中文        render.getFontResolver().addFont(ftlPath + "/MSYH.TTC", BaseFont.IDENTITY_H, BaseFont.NOT_EMBEDDED);        //Microsoft YaHei,Open Sans,Gotham-Book,Lantinghei SC        return render;    }     //获取要写入PDF的内容    public static String getPdfContent(String ftlPath, String ftlName, Object o) throws TemplateNotFoundException, MalformedTemplateNameException, ParseException, IOException, TemplateException {        return useTemplate(ftlPath, ftlName, o);    }     //使用freemarker得到html内容    public static String useTemplate(String ftlPath, String ftlName, Object o) throws TemplateNotFoundException, MalformedTemplateNameException, ParseException, IOException, TemplateException {        StringWriter writer = new StringWriter();        String html = null;        try {       Template tpl = freemarkerCfg.getTemplate(ftlName);       tpl.setEncoding("UTF-8");       tpl.process(o, writer);       writer.flush();       html = writer.toString();        }catch (Exception e) {            e.printStackTrace();        } finally {            try {            writer.close();            } catch (IOException ex) {                ex.printStackTrace();            }        }        return html;    } }

PDF生成工具类

import java.beans.PropertyDescriptor;import java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.io.OutputStream;import java.text.SimpleDateFormat;import java.util.HashMap;import java.util.Map;import javax.servlet.http.HttpServletResponse;import org.apache.commons.beanutils.PropertyUtilsBean;import org.slf4j.Logger;import org.xhtmlrenderer.pdf.ITextRenderer;import com.dji.hire.util.LogUtil;import com.itextpdf.text.DocumentException;import freemarker.core.ParseException;import freemarker.template.MalformedTemplateNameException;import freemarker.template.TemplateException;import freemarker.template.TemplateNotFoundException; /** * PDF生成工具类 * */public class PdfUtils { // /**// * 日志记录// */private static final Logger logger = LogUtil.get();    public static void main(String[] args) {    try {             Map<Object, Object> o=new HashMap<Object, Object>();            o.put("name", "http://www.xdemo.org/");            o.put("imagePath", "test.png");             String path = "E:/test/";             SimpleDateFormat sdf = new SimpleDateFormat("yyMMddHHmmss");    String warrantyCard = sdf.format(new java.util.Date());             String pdf = "D:\\"+warrantyCard+"xdemo.pdf";           // String path=PdfHelper.getPath();            generateToFile(path, "tpl.ftl",path, o, pdf);             //     String f = readTxtFile("D:/newfile597f7ec6-99fe-4175-a2a8-c7f44db675de.html");//     System.out.println(f);        } catch (Exception e) {            e.printStackTrace();        }     }             public static Map<String, Object> beanToMap(Object obj) {         Map<String, Object> params = new HashMap<String, Object>(0);         try {             PropertyUtilsBean propertyUtilsBean = new PropertyUtilsBean();             PropertyDescriptor[] descriptors = propertyUtilsBean.getPropertyDescriptors(obj);             for (int i = 0; i < descriptors.length; i++) {                 String name = descriptors[i].getName();                 if (!"class".equals(name)) {                     params.put(name, propertyUtilsBean.getNestedProperty(obj, name));                 }             }         } catch (Exception e) {             e.printStackTrace();         }         return params; }        /**     * 生成PDF到文件     * @param ftlPath 模板文件路径（不含文件名）     * @param ftlName 模板文件吗（不含路径）     * @param imageDiskPath 图片的磁盘路径     * @param data 数据     * @param outputFile 目标文件（全路径名称）     * @throws Exception     */    public static void generateToFile(String ftlPath,String ftlName,String imageDiskPath,Object data,String outputFile) throws Exception {    String html=PdfHelper.getPdfContent(ftlPath, ftlName, data);       // logger.info(html);        try {       OutputStream out = null;       ITextRenderer render = null;       out = new FileOutputStream(outputFile);       render = PdfHelper.getRender(ftlPath);       render.setDocumentFromString(html);       if(imageDiskPath!=null&&!imageDiskPath.equals("")){        if(isLinux()){        //html中如果有图片，图片的路径则使用这里设置的路径的相对路径，这个是作为根路径           render.getSharedContext().setBaseURL("file:"+imageDiskPath);        }else{        //html中如果有图片，图片的路径则使用这里设置的路径的相对路径，这个是作为根路径           render.getSharedContext().setBaseURL("file:/"+imageDiskPath);        }                  }       render.layout();       render.createPDF(out);       render.finishPDF();       render = null;       out.close();        } catch (Exception e) {e.printStackTrace();}    }         /**     * 判断当前环境是否为Linux     * @return     */    public static boolean isLinux(){    String os = System.getProperty("os.name").toLowerCase();    if(os.indexOf("linux")>=0){    return true;    }else{    return false;    }    }            public static String readTxtFile(String filePath){    String texst = "";        try {                String encoding="UTF-8";                File file=new File(filePath);                if(file.isFile() && file.exists()){ //判断文件是否存在                    InputStreamReader read = new InputStreamReader(                    new FileInputStream(file),encoding);//考虑到编码格式                    BufferedReader bufferedReader = new BufferedReader(read);                    String lineTxt = "";                    while((lineTxt = bufferedReader.readLine()) != null){                    texst = texst + lineTxt;                    }                    read.close();        }else{        logger.info("找不到指定的文件");        }        } catch (Exception e) {        logger.error("读取文件内容出错");            e.printStackTrace();        }     return texst;    }        /**     * 生成PDF到输出流中（ServletOutputStream用于下载PDF）     * @param ftlPath ftl模板文件的路径（不含文件名）     * @param ftlName ftl模板文件的名称（不含路径）     * @param imageDiskPath 如果PDF中要求图片，那么需要传入图片所在位置的磁盘路径     * @param data 输入到FTL中的数据     * @param response HttpServletResponse     * @return     * @throws TemplateNotFoundException     * @throws MalformedTemplateNameException     * @throws ParseException     * @throws IOException     * @throws TemplateException     * @throws DocumentException     */    public static OutputStream generateToServletOutputStream(String ftlPath,String ftlName,String imageDiskPath,Object data,HttpServletResponse response) throws TemplateNotFoundException, MalformedTemplateNameException, ParseException, IOException, TemplateException, DocumentException{        String html=PdfHelper.getPdfContent(ftlPath, ftlName, data);        OutputStream out = null;        ITextRenderer render = null;        out = response.getOutputStream();        render = PdfHelper.getRender(ftlPath);        render.setDocumentFromString(html);        if(imageDiskPath!=null&&!imageDiskPath.equals("")){            //html中如果有图片，图片的路径则使用这里设置的路径的相对路径，这个是作为根路径            render.getSharedContext().setBaseURL("file:/"+imageDiskPath);        }        render.layout();        render.createPDF(out);        render.finishPDF();        render = null;        return out;    }}