java itext实现pdf下载

最新推荐文章于 2022-12-01 16:41:27 发布

我不当大哥好多年了

最新推荐文章于 2022-12-01 16:41:27 发布

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本文链接：https://blog.youkuaiyun.com/qq_35476299/article/details/80228193

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本文介绍了一个使用Java实现的PDF填表方法，通过itextpdf库完成PDF文档的填充，并解决了中文显示及浏览器下载时的文件名乱码问题。

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第一步准备好pdf模板

要先下载安装Adobe Acrobat DC 分享一下地址 https://pan.baidu.com/s/15GoD_z9LdLcHWIoVIzdH0A 密码 tyq3

然后将你要赋值的参数名写上

第二步接下来写的代码

  <!-- itext pdf -->  
        <dependency>  
            <groupId>com.itextpdf</groupId>  
            <artifactId>itextpdf</artifactId>  
            <version>${itextpdf.version}</version>  
        </dependency>
        <!-- https://mvnrepository.com/artifact/com.itextpdf/itext-asian -->
		<dependency>
		    <groupId>com.itextpdf</groupId>
		    <artifactId>itext-asian</artifactId>
		    <version>${itext-asian.version}</version>
		</dependency>

@RequestMapping(value = "download")
	public void downLoadAccessApply(Long applyId, HttpServletResponse response, HttpServletRequest request)
			throws IOException, DocumentException {
		String filename = "物联网API接入申请单.pdf";
		if (HttpRequest.isMSBrowser(request)) {
			// IE浏览器的乱码问题解决
			filename = URLEncoder.encode(filename, "UTF-8");
		} else {
			// 万能乱码问题解决
			filename = new String(filename.getBytes("UTF-8"), "ISO-8859-1");
		}
		// 设置请求返回类型
		response.setContentType("application/pdf");
		response.setHeader("Content-Disposition", "attachment;filename=\"" + filename + "\"");
		ResponseVO queryAccessApplyDetail = accessApplyService.queryAccessApplyDetail(applyId,CommonFunction.getUser(request).getUserId());
		AccessApplyDetailVO aadv = (AccessApplyDetailVO) queryAccessApplyDetail.getResult().get(0);
		PdfReader reader;
		ByteArrayOutputStream bos;
		PdfStamper stamper;
		OutputStream out1 = response.getOutputStream();
		// 读取pdf模板
		reader = new PdfReader(AccessApplyConstant.PDF);
		bos = new ByteArrayOutputStream();
		stamper = new PdfStamper(reader, bos);
		AcroFields form = stamper.getAcroFields();
		// 封装参数
		encapsulationField(form, aadv);
		// 如果为false那么生成的PDF文件还能编辑，一定要设为true
		stamper.setFormFlattening(true);
		stamper.close();
		// 1，创建文档对象
		Document document = new Document();
		PdfCopy copy = new PdfCopy(document, out1);
		// 2，监听输出流
		PdfWriter instance = PdfWriter.getInstance(document, out1);
		// 3，打开文档
		document.open();
		// 4，添加文本
		PdfImportedPage importPage = copy.getImportedPage(new PdfReader(bos.toByteArray()), 1);
		copy.addPage(importPage);
		try {
			// 5，关闭文档
			document.close();
			instance.flush();
			instance.close();
			out1.flush();
			out1.close();
		} catch (Exception e) {
			log.info("The document has no pages");
		}
	}

	public void encapsulationField(AcroFields form, AccessApplyDetailVO aadv) throws DocumentException, IOException {
		// 使用中文字体
		BaseFont bf = BaseFont.createFont("STSong-Light", "UniGB-UCS2-H", BaseFont.NOT_EMBEDDED);
		form.setField("serialNo", aadv.getSerialNo());
		form.setFieldProperty("customerName", "textfont", bf, null); // 设置中文格式
		form.setField("customerName", aadv.getCustomerName());
		form.setFieldProperty("contactName", "textfont", bf, null); // 设置中文格式
		form.setField("contactName", aadv.getContactName());
		form.setFieldProperty("contactPhone", "textfont", bf, null); // 设置中文格式
		form.setField("contactPhone", aadv.getContactPhone());
		form.setFieldProperty("address", "textfont", bf, null); // 设置中文格式
		form.setField("address", aadv.getAddress());
		form.setField("ip", aadv.getIp());
		SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
		form.setField("applyTime", sdf.format(aadv.getApplyTime()));
		String userTime = "";
		if (aadv.getUseTime().equals(AccessApplyEnum.THREE_MONTH.getCode())) {
			userTime = AccessApplyEnum.THREE_MONTH.getMsg();
		} else if (aadv.getUseTime().equals(AccessApplyEnum.SIX_MONTH.getCode())) {
			userTime = AccessApplyEnum.SIX_MONTH.getMsg();
		} else if (aadv.getUseTime().equals(AccessApplyEnum.ONE_YEAR.getCode())) {
			userTime = AccessApplyEnum.ONE_YEAR.getMsg();
		} else if (aadv.getUseTime().equals(AccessApplyEnum.TWO_YEAR.getCode())) {
			userTime = AccessApplyEnum.TWO_YEAR.getMsg();
		} else if (aadv.getUseTime().equals(AccessApplyEnum.THREE_YEAR.getCode())) {
			userTime = AccessApplyEnum.THREE_YEAR.getMsg();
		} else {
			userTime = "未知";
		}
		form.setField("useTime", userTime);
		Set<ApiInfo> apiInfoSet = aadv.getApiInfoSet();
		StringBuilder apiInfos = new StringBuilder();
		for (ApiInfo api : apiInfoSet) {
			apiInfos.append(" " + api.getApiNo() + "   " + api.getApiName() + "\n");
		}
		form.setFieldProperty("apiInfoSet", "textfont", bf, null); // 设置中文格式
		form.setField("apiInfoSet", apiInfos.toString());
		StringBuilder type = new StringBuilder();
		if (aadv.getType().equals(AccessApplyEnum.TEST.getCode())) {
			type.append(AccessApplyEnum.TEST.getMsg());
		} else if (aadv.getType().equals(AccessApplyEnum.COMMERCIAL.getCode())) {
			type.append(AccessApplyEnum.COMMERCIAL.getMsg());
		} else {
			type.append("未知");
		}
		form.setFieldProperty("type", "textfont", bf, null); // 设置中文格式
		form.setField("type", type.toString());
		form.setFieldProperty("specificContent", "textfont", bf, null); // 设置中文格式
		form.setField("specificContent", aadv.getSpecificContent());
	}

搞定，记录下。

有问题，欢迎留言。