SpringBoot加Poi仿照EasyPoi實現Excel導出
阿新 • • 發佈：2019-01-23
coder 地址 屬性 pre ice tle sele boot excel表
POI提供API給Java程序對Microsoft Office格式檔案讀和寫的功能，詳細功能可以直接查閱API,因為使用EasyPoi過程中總是缺少依賴，沒有搞明白到底是什麽坑，索性自己寫一個簡單工具類，來實現無論傳入任何對象集合，都能夠實現導出Excel的功能，沒有看EasyPoi的源碼， 只是在功能上模仿一下。
首先導入基本依賴，除了SpringBoot基本依賴依賴，導入Poi的依賴
<!-- https://mvnrepository.com/artifact/org.apache.poi/poi --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi</artifactId> <version>3.17</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.poi/poi-ooxml --> <dependency> <groupId>org.apache.poi</groupId> <artifactId>poi-ooxml</artifactId> <version>3.17</version> </dependency>
編寫自定義註解
@Retention(RetentionPolicy.RUNTIME) public @interface Excel {
//Excel列名稱 String name() default "";
//Excel列數 int orderNum() default 0; }
編寫javaBean,所有需要導出的屬性都使用Excel註解
public class Person{ private String id; @Excel(name = "用戶姓名") private String userName; @Excel(name= "電話",orderNum = 1) private String phone; @Excel(name = "郵箱",orderNum = 2) private String email; @Excel(name = "地址",orderNum = 3) private String address; public void setId(String id){ this.id=id; } public String getId(){ return id; } public void setUserName(String userName){ this.userName=userName; } public String getUserName(){ return userName; } public void setphone(String phone){ this.phone=phone; } public String getphone(){ return phone; } public void setEmail(String email){ this.email=email; } public String getEmail(){ return email; } public void setAddress(String address){ this.address=address; } public String getAddress(){ return address; } }
編寫工具類
public class PoiUtils { /** * * 功能描述: * 需要導出的屬性要加Excel註解，實現Excel導出功能 * @param: [list, fileName, sheetName, response, clazz] * @return: void * @auther: wang * @date: 2019/1/18 15:31 */ public Static <T> void export(Collection<T> collection, String fileName, String sheetName, HttpServletResponse response, Class<?> clazz) throws IOException, IntrospectionException, InvocationTargetException, IllegalAccessException { HSSFWorkbook workbook = new HSSFWorkbook(); //創建一個Excel表單,參數為sheet的名字 HSSFSheet sheet = workbook.createSheet(sheetName); //創建表頭 setTitle(workbook, sheet, clazz); //新增數據行，並且設置單元格數據 int rowNum = 1; for (T t : collection) { HSSFRow row = sheet.createRow(rowNum); Field[] fields = clazz.getDeclaredFields(); for (Field field : fields) { if (field.isAnnotationPresent(Excel.class)) { PropertyDescriptor pd = new PropertyDescriptor(field.getName(), clazz); Method getMethod = pd.getReadMethod();//獲得get方法 Excel excel = field.getAnnotation(Excel.class); row.createCell(excel.orderNum()).setCellValue(String.valueOf(getMethod.invoke(t))); } } rowNum++; } //清空response response.reset(); // 告訴瀏覽器用什麽軟件可以打開此文件 response.setHeader("content-Type", "application/vnd.ms-excel"); // 下載文件的默認名稱 response.setHeader("Content-Disposition", "attachment;filename=" + URLEncoder.encode(fileName + ".xls", "utf-8")); OutputStream os; //可以將生成Excel默認下載到某個目錄下 //os = new BufferedOutputStream(new FileOutputStream("D:\\bmj\\target\\bmj128-0.0.1\\" + fileName));
//也可以通過response得到輸出流，寫到輸出流中，在頁面中進行下載 os = new BufferedOutputStream(response.getOutputStream()); //將excel寫入到輸出流中 workbook.write(os); os.flush(); os.close(); } /*** * 設置表頭 * @param workbook * @param sheet */ private static void setTitle(HSSFWorkbook workbook, HSSFSheet sheet, Class clazz) { HSSFRow row = sheet.createRow(0); Field[] fields = clazz.getDeclaredFields(); //設置為居中加粗 HSSFCellStyle style = workbook.createCellStyle(); HSSFFont font = workbook.createFont(); //設置字體 font.setFontName("宋體"); //設置粗體 font.setBold(true); //設置字號 font.setFontHeightInPoints((short) 14); //設置顏色 font.setColor(IndexedColors.BLACK.index); style.setFont(font); HSSFCell cell; for (Field field : fields) { if (field.isAnnotationPresent(Excel.class)) { Excel excel = field.getAnnotation(Excel.class); cell = row.createCell(excel.orderNum()); cell.setCellValue(excel.name()); cell.setCellStyle(style); sheet.setColumnWidth(excel.orderNum(), 30*256); } } } }
頁面調用，頁面采用的是EasyUI框架
<div style="padding:5px;background:#fafafa;width:100%;"> <a href="javascript:void(0)" class="easyui-linkbutton" plain="true" iconCls="icon-undo" onclick="downLoadExcel()">導出日誌</a> </div>
可以按照頁面給增加篩選條件，根據篩選條件下載
function downLoadExcel(){ var url=base+‘/api/xx?xx=‘+$("#xx").val()+‘&xx=‘+$("#xx").val()+‘&xx=‘+$("#xx").val(); window.location.href = url; }
編寫Controller
@RestController @RequestMapping(value = "/api/xx") public class PersonController { private static final Logger LOG = LoggerFactory.getLogger(PersonController .class); @Resource(name = "personService") private PersonService personService; @RequestMapping("/export") public void export(PersonQuery personQuery, HttpServletResponse response) { List<Person> personList = personService.selectAll(personQuery); try { PoiUtils.export(auditLogList, "審計日誌", "審計日誌", response,AuditLog.class); } catch (IOException | IntrospectionException | InvocationTargetException | IllegalAccessException e) { LOG.error("審計日誌錯誤{}",e); } } }
頁面如下
點擊導出日誌，顯示如下
目前僅僅是針對單個sheet的操作，也沒有像合並單元格這種復雜操作，需要繼續完善。
SpringBoot加Poi仿照EasyPoi實現Excel導出