6、jeecg 笔记之自定义excel 模板导出（一）

1、前言

jeecg 中已经自带 excel 的导出导出功能，其所使用的是 easypoi，尽管所导出的 excel 能满足大部分需求，

但总是有需要用到自定义 excel 导出模板，下文所用到的皆是 easypoi 提供的，为方便下次翻阅，故记之。

2、代码部分

2.1、controller

    @RequestMapping("/myExcel")public void myExcel(JeecgDemoExcelEntity jeecgDemoExcel, HttpServletRequest request, HttpServletResponse response)throws IOException {TemplateExportParams params = new TemplateExportParams(request.getServletContext().getRealPath("/") + "export/template/exportMyExcel.xls");params.setHeadingStartRow(3);params.setHeadingRows(2);Map<String, Object> map = new HashMap<String, Object>();map.put("date", "2014-12-25");map.put("money", 2000000.00);map.put("upperMoney", "贰佰万");map.put("company", "执笔潜行科技有限公司");map.put("bureau", "财政局");map.put("person", "JueYue");map.put("phone", "1879740****");List<TemplateExcelExportEntity> list = new ArrayList<TemplateExcelExportEntity>();for (int i = 0; i < 4; i++) {TemplateExcelExportEntity entity = new TemplateExcelExportEntity();entity.setIndex(i + 1 + "");entity.setAccountType("开源项目");entity.setProjectName("EasyPoi " + i + "期");entity.setAmountApplied(i * 10000 + "");entity.setApprovedAmount((i + 1) * 10000 - 100 + "");List<BudgetAccountsEntity> budgetAccounts = Lists.newArrayList();for (int j = 0; j < 1; j++) {BudgetAccountsEntity accountsEntity = new BudgetAccountsEntity();accountsEntity.setCode("A001");accountsEntity.setName("设计");budgetAccounts.add(accountsEntity);accountsEntity = new BudgetAccountsEntity();accountsEntity.setCode("A002");accountsEntity.setName("开发");budgetAccounts.add(accountsEntity);}entity.setBudgetAccounts(budgetAccounts);PayeeEntity payeeEntity = new PayeeEntity();payeeEntity.setBankAccount("6222 0000 1234 1234");payeeEntity.setBankName("中国银行");payeeEntity.setName("小明");entity.setPayee(payeeEntity);list.add(entity);}Workbook workbook = ExcelExportUtil.exportExcel(params, TemplateExcelExportEntity.class, list, map);File savefile = new File("D:/excel/");if (!savefile.exists()) {savefile.mkdirs();}FileOutputStream fos = new FileOutputStream("D:/excel/专项支出用款申请书.xls");workbook.write(fos);fos.close();}

2.2、entity 实体类

TemplateExcelExportEntity.class

public class TemplateExcelExportEntity implements Serializable {
private static final long serialVersionUID = 1L;@Excel(name = "序号")private String index;@Excel(name = "资金性质")private String accountType;@ExcelCollection(name = "预算科目")private List<BudgetAccountsEntity> budgetAccounts;@Excel(name = "项目名称")private String projectName;@ExcelEntity(name = "收款人")private PayeeEntity payee;@Excel(name = "申请金额")private String amountApplied;@Excel(name = "核定金额")private String approvedAmount;
　　 get set ...

}

BudgetAccountsEntity.class（预算）

public class BudgetAccountsEntity {@Excel(name = "编码")private String code;@Excel(name = "名称")private String name;

    get set ...

PayeeEntity.class（收款人）

public class PayeeEntity {@Excel(name = "全称")private String name;@Excel(name = "银行账号")private String bankAccount;@Excel(name = "开户银行")private String bankName;get set ...}

2.3、导出工具类 ExcelExportUtil.class

public final class ExcelExportUtil {private ExcelExportUtil() {}/*** @param entity*            表格标题属性* @param pojoClass*            Excel对象Class* @param dataSet*            Excel对象数据List*/public static Workbook exportExcel(ExportParams entity, Class<?> pojoClass, Collection<?> dataSet) {Workbook workbook;if (ExcelType.HSSF.equals(entity.getType())) {workbook = new HSSFWorkbook();} else if (dataSet.size() < 1000) {workbook = new XSSFWorkbook();} else {workbook = new SXSSFWorkbook();}new ExcelExportServer().createSheet(workbook, entity, pojoClass, dataSet);return workbook;}/*** 根据Map创建对应的Excel* * @param entity*            表格标题属性* @param pojoClass*            Excel对象Class* @param dataSet*            Excel对象数据List*/public static Workbook exportExcel(ExportParams entity, List<ExcelExportEntity> entityList, Collection<? extends Map<?, ?>> dataSet) {Workbook workbook;if (ExcelType.HSSF.equals(entity.getType())) {workbook = new HSSFWorkbook();} else if (dataSet.size() < 1000) {workbook = new XSSFWorkbook();} else {workbook = new SXSSFWorkbook();}new ExcelExportServer().createSheetForMap(workbook, entity, entityList, dataSet);return workbook;}/*** 一个excel 创建多个sheet* * @param list*            多个Map key title 对应表格Title key entity 对应表格对应实体 key data*            Collection 数据* @return*/public static Workbook exportExcel(List<Map<String, Object>> list, String type) {Workbook workbook;if (ExcelType.HSSF.equals(type)) {workbook = new HSSFWorkbook();} else {workbook = new XSSFWorkbook();}for (Map<String, Object> map : list) {ExcelExportServer server = new ExcelExportServer();server.createSheet(workbook, (ExportParams) map.get("title"), (Class<?>) map.get("entity"), (Collection<?>) map.get("data"));}return workbook;}/*** 导出文件通过模板解析,不推荐这个了,推荐全部通过模板来执行处理* * @param params*            导出参数类* @param pojoClass*            对应实体* @param dataSet*            实体集合* @param map*            模板集合* @return*/public static Workbook exportExcel(TemplateExportParams params, Class<?> pojoClass, Collection<?> dataSet, Map<String, Object> map) {return new ExcelExportOfTemplateUtil().createExcleByTemplate(params, pojoClass, dataSet, map);}/*** 导出文件通过模板解析只有模板,没有集合* * @param params*            导出参数类* @param map*            模板集合* @return*/public static Workbook exportExcel(TemplateExportParams params, Map<String, Object> map) {return new ExcelExportOfTemplateUtil().createExcleByTemplate(params, null, null, map);}}