java word模版占位符替换(${xx})替换

╰+哭是因爲堅強的太久メ 2023-10-11 21:56 89阅读 0赞

## 前言 ##

最近拿到一个这样开发需求，每个公司都会有自己的合同模版，模版的内容需要来源于线上数据，也就是我们标题所理解的填充。

### 一、模版图 ###

![在这里插入图片描述][939d537f6fb344f4855e0f67df2a18bd.png]

### 二、效果图 ###

![在这里插入图片描述][dec28e793f98466c8f5e8439abe8a5e3.png]

特此说明:上述模版内容均为测试数据，不具备任何真实性。

### 三、代码实现 ###

#### 3.1maven依赖 ####

<dependency>
                <groupId>cn.hutool</groupId>
                <artifactId>hutool-all</artifactId>
                <version>4.5.7</version>
            </dependency>
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-excelant</artifactId>
                <version>3.12</version>
            </dependency>
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-scratchpad</artifactId>
                <version>3.12</version>
            </dependency>
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-ooxml</artifactId>
                <version>3.8</version>
            </dependency>
            <dependency>
                <groupId>org.apache.poi</groupId>
                <artifactId>poi-ooxml-schemas</artifactId>
                <version>3.8</version>
            </dependency>

#### 3.2核心工具类 ####

public void exportWord(String contractId, String bizId,HttpServletResponse response) throws Exception {
        
            ContractInfoVo contractInfoVo = remoteContractInfoService.getById(contractId).getData();
            if (Objects.nonNull(contractInfoVo)){
        
                new ZsqyException("合同数据异常");
            }
    
            List<CAttachment> list = attachmentService.list(
                    new LambdaQueryWrapper<CAttachment>()
                            .eq(CAttachment::getBizId, bizId));
            if (list.size() == 0) {
        
                new ZsqyException("当前模版数据下未上传模版文件");
            }
            CAttachment attachment = list.get(0);
            InputStream inputStream = minioUtil.download(attachment.getFilePath(), attachment.getFileMd5Name());
            Map<String, String> pamraMap =getValueMap(contractInfoVo);
            XWPFDocument document = new XWPFDocument(inputStream);
            Iterator<XWPFParagraph> itPara = document.getParagraphsIterator();
    
            List<XWPFParagraph> paragraphList=new ArrayList<>();
            while (itPara.hasNext()) {
        
                XWPFParagraph paragraph = (XWPFParagraph) itPara.next();
                List<XWPFRun> runs = paragraph.getRuns();
                for (int i = 0; i < runs.size(); i++) {
        
                    String oneparaString = runs.get(i).getText(runs.get(i).getTextPosition());
                    if (StringUtils.isBlank(oneparaString)){
        
                        continue;
                    }
                    oneparaString=oneparaString.trim();
                    for (Map.Entry<String, String> entry : pamraMap.entrySet()) {
        
                        if (oneparaString.contains(entry.getKey())) {
        
                            oneparaString = oneparaString.replace(entry.getKey(), entry.getValue());
                        }
    
                    }
                    runs.get(i).setText(oneparaString, 0);
                }
                paragraphList.add(paragraph);
            }
            replaceWordText(paragraphList,pamraMap);
            response.reset();
            response.addHeader("Content-Disposition", "attachment; filename=" + URLEncoder.encode(contractInfoVo.getContractName()+".docx", "UTF-8"));
            response.setContentType("application/octet-stream");
            OutputStream out = response.getOutputStream();
            document.write(out);//将word对象内容写入输出流
        }
        public Map<String, String> getValueMap(ContractInfoVo contractInfoVo){
        
            SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
            Map<String, String> map=new HashMap<>();
            map.put("${
        {合同简称}}", isEmpty(contractInfoVo.getContractName()));
            ........
    		return map
    }

代码解读  
1.查询业务数据  
2.从minio中获取模版文件  
3.将文档中的输入流放入XWPFDocument对象中解析，拿到具体的行对象  
4.拿到行对象后遍历，匹配占位符($\{xx\})。  
5.占位符内容替换成功，输出流，浏览器下载。

[939d537f6fb344f4855e0f67df2a18bd.png]: https://img-blog.csdnimg.cn/939d537f6fb344f4855e0f67df2a18bd.png
[dec28e793f98466c8f5e8439abe8a5e3.png]: https://img-blog.csdnimg.cn/dec28e793f98466c8f5e8439abe8a5e3.png