java POI Excel单元格内容换行
pom.xml
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<dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.15</version> </dependency> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.15</version> </dependency> <dependency> <groupId>commons-io</groupId> <artifactId>commons-io</artifactId> <version>2.5</version> </dependency> |
核心代码
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@RestControllerpublic class MyController { @RequestMapping("/ip/v5") public void getExcel(HttpServletResponse response) throws IOException { ArrayList<String> arrayList = new ArrayList<String>(); arrayList.add("this is 单元格第1行"); arrayList.add("this is 单元格第2行"); arrayList.add("this is 单元格第3行"); arrayList.add("this is 单元格第4行"); XSSFWorkbook workBook = new XSSFWorkbook(); XSSFSheet sheet = workBook.createSheet(); workBook.setSheetName(0, "ip-v4表"); XSSFCellStyle cs = workBook.createCellStyle(); // 换行的关键，自定义单元格内容换行规则 cs.setWrapText(true); String fileName = "china-ip-v4" + ".xls";// 设置要导出的文件的名字 String[] headers = { "掩码" }; XSSFRow titleRow = sheet.createRow(0); // 在excel表中添加表头 for (int i = 0; i < headers.length; i++) { titleRow.createCell(i).setCellValue(headers[i]); } String content = String.join("\n", arrayList); int rowNum = 1; XSSFRow row1 = sheet.createRow(rowNum); // 创建一行 XSSFCell cell = row1.createCell(0); // 创建一个单元格 // 如下也是可以的 //cell.setCellValue("this is 单元格第1行 \n this is单元格第2行 \n this is 单元格第3行 \n this is 单元格第4行"); cell.setCellValue(content); cell.setCellStyle(cs); response.setContentType("application/octet-stream"); response.setHeader("Content-disposition", "attachment;filename=" + fileName); response.flushBuffer(); workBook.write(response.getOutputStream()); }} |
结果：
poi单元格写值强制换行
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String str="强制\r\n换行" |
在字符串中间加上\r\n就行了~
以上为个人经验，希望能给大家一个参考，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/congcongxianshen/article/details/100746858
