pdf导出功能

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依赖包itextpdf:5.5.6

package com.changfu.common.util;import com.itextpdf.text.DocumentException;import com.itextpdf.text.Image;import com.itextpdf.text.Rectangle;import com.itextpdf.text.pdf.*;import lombok.extern.slf4j.Slf4j;import org.springframework.core.io.support.PathMatchingResourcePatternResolver;import org.springframework.util.ResourceUtils;import java.io.*;import java.util.Map;/** * PDF生成工具类 * Created by J.W on 2017/4/17 0017. */@Slf4jpublic class PDFUtil {    public static final String FORMAT = ".pdf";    private static final String DEFAULT_WINDOWS_PATH = "D:\\data\\contract";    private static final Boolean IS_WINDOWS_OS =  System.getProperty("os.name").startsWith("Windows");    /**     * 生成pdf     * @param targetPath 目标路径     * @param targetName 目标名称（不要带后缀名）     * @param fieldsMap 表单填充数据集合     * @param sealsMap 图片填充集合 例: Key:"partyASeal" value:"http://xxxx.png"     */    public static File createPDF(String templateName,                                String targetPath,                                 String targetName,                                 Map<String, String> fieldsMap,                                 Map<String, String> sealsMap) throws IOException, DocumentException {        PdfReader reader = null;        PdfStamper stamper = null;        InputStream is = null;        OutputStream output = null;        try {            is = PDFUtil.class.getClassLoader().getResourceAsStream(templateName);            log.info("获取模板字节流[{}]", is);//            File templateFile = ResourceUtils.getFile(templateName);//            inputStream = new FileInputStream(templateFile);            String targetFilePath = null;            if(IS_WINDOWS_OS) {                targetFilePath = DEFAULT_WINDOWS_PATH + File.separator + targetName + FORMAT;            } else {                targetFilePath = targetPath + File.separator + targetName + FORMAT;            }            reader = new PdfReader(is);            File targetFile = new File(targetFilePath);            if(!targetFile.getParentFile().isDirectory()) {                log.info("创建合同文件[{}]", targetFile.getAbsolutePath());                targetFile.getParentFile().mkdirs();            }            if(!targetFile.exists()) {                log.info("创建合同文件[{}]", targetFile.getAbsolutePath());                targetFile.createNewFile();            }            output = new FileOutputStream(targetFile);            stamper = new PdfStamper(reader, output);            AcroFields acroFields = stamper.getAcroFields();            //给表单添加中文字体 这里采用系统字体。不设置的话，中文可能无法显示            BaseFont bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H",BaseFont.NOT_EMBEDDED);//            BaseFont bf = null;//            if(IS_WINDOWS_OS) {//                bf = BaseFont.createFont("C:\\Windows\\Fonts\\SIMSUN.TTC,1",BaseFont.IDENTITY_H, BaseFont.EMBEDDED);//            } else {//                bf = BaseFont.createFont("C:\\Windows\\Fonts\\SIMSUN.TTC,1",BaseFont.IDENTITY_H, BaseFont.EMBEDDED);//            }            acroFields.addSubstitutionFont(bf);            // 开始填充表单            for(Map.Entry<String, String> entry : fieldsMap.entrySet()) {                if(entry.getValue() == null) {                    continue;                }                acroFields.setField(entry.getKey(), entry.getValue());            }            // 填充图片            for(Map.Entry<String, String> entry : sealsMap.entrySet()) {                if(entry.getValue() == null) {                    continue;                }                int pageNo = acroFields.getFieldPositions(entry.getKey()).get(0).page;                Rectangle rectangle = acroFields.getFieldPositions(entry.getKey()).get(0).position;                float x = rectangle.getLeft();                float y = rectangle.getBottom();                // 读图片                Image image = Image.getInstance(entry.getValue());                // 获取操作的页面                PdfContentByte under = stamper.getOverContent(pageNo);                // 根据域的大小缩放图片                image.scaleToFit(rectangle.getWidth(), rectangle.getHeight());                // 添加图片                image.setAbsolutePosition(x, y);                under.addImage(image);            }            stamper.setFormFlattening(true);            return targetFile;        } catch (Exception e) {            log.error("生成pdf失败 templateName={}, targetName={}", templateName, targetName, e);            throw e;        } finally {            try {                stamper.close();            } catch (Exception e) {                stamper = null;            }            try {                reader.close();            } catch (Exception e) {                reader = null;            }            try {                output.close();            } catch (Exception e) {                output = null;            }            try {                is.close();            } catch (Exception e) {                is = null;            }        }    }}

@RequestMapping("downloadContract/{id}")    @RequiresPermissions("tcTransaction:index")    @ResponseBody    public String downloadContract(Model model,                                   @PathVariable("id") Long id) {        return tcContractService.downloadContract(id);    }

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