-------------------------- EasyPoi 模板 表达式支持 -------------------------- - 空格分割 - 三目运算 {{test ? obj:obj2}} - n: 表示 这个cell是数值类型 {{n:}} - le: 代表长度{{le:()}} 在if/else 运用{{le:() > 8 ? obj1 : obj2}} - fd: 格式化时间 {{fd:(obj;yyyy-MM-dd)}} - fn: 格式化数字 {{fn:(obj;###.00)}} - fe: 遍历数据,创建row - !fe: 遍历数据不创建row - $fe: 下移插入,把当前行,下面的行全部下移.size()行,然后插入 - !if: 删除当前列 {{!if:(test)}} - 单引号表示常量值 '' 比如'1' 那么输出的就是 1 - &NULL& 控制 - ]] 换行符 --------------------------- EasyPoi导出实例 --------------------------- 1.注解,导入导出都是基于注解的,实体上做上注解,标示导出对象,同时可以做一些操作 ```Java @ExcelTarget("courseEntity") public class CourseEntity implements java.io.Serializable { /** 主键 */ private String id; /** 课程名称 */ @Excel(name = "课程名称", orderNum = "1", needMerge = true) private String name; /** 老师主键 */ @ExcelEntity(id = "yuwen") @ExcelVerify() private TeacherEntity teacher; /** 老师主键 */ @ExcelEntity(id = "shuxue") private TeacherEntity shuxueteacher; @ExcelCollection(name = "选课学生", orderNum = "4") private List<StudentEntity> students; ``` 2.基础导出 传入导出参数,导出对象,以及对象列表即可完成导出 ```Java HSSFWorkbook workbook = ExcelExportUtil.exportExcel(new ExportParams( "2412312", "测试", "测试"), CourseEntity.class, list); ``` 3.基础导出,带有索引 在到处参数设置一个值,就可以在导出列增加索引 ```Java ExportParams params = new ExportParams("2412312", "测试", "测试"); params.setAddIndex(true); HSSFWorkbook workbook = ExcelExportUtil.exportExcel(params, TeacherEntity.class, telist); ``` 4.导出Map 创建类似注解的集合,即可完成Map的导出,略有麻烦 ```Java List<ExcelExportEntity> entity = new ArrayList<ExcelExportEntity>(); entity.add(new ExcelExportEntity("姓名", "name")); entity.add(new ExcelExportEntity("性别", "sex")); List<Map<String, String>> list = new ArrayList<Map<String, String>>(); Map<String, String> map; for (int i = 0; i < 10; i++) { map = new HashMap<String, String>(); map.put("name", "1" + i); map.put("sex", "2" + i); list.add(map); } HSSFWorkbook workbook = ExcelExportUtil.exportExcel(new ExportParams( "测试", "测试"), entity, list); ``` 5.模板导出 根据模板配置,完成对应导出 ```Java TemplateExportParams params = new TemplateExportParams(); params.setHeadingRows(2); params.setHeadingStartRow(2); Map<String,Object> map = new HashMap<String, Object>(); map.put("year", "2013"); map.put("sunCourses", list.size()); Map<String,Object> obj = new HashMap<String, Object>(); map.put("obj", obj); obj.put("name", list.size()); params.setTemplateUrl("org/jeecgframework/poi/excel/doc/exportTemp.xls"); Workbook book = ExcelExportUtil.exportExcel(params, CourseEntity.class, list, map); ``` 6.导入 设置导入参数,传入文件或者流,即可获得相应的list ```Java ImportParams params = new ImportParams(); params.setTitleRows(2); params.setHeadRows(2); //params.setSheetNum(9); params.setNeedSave(true); long start = new Date().getTime(); List<CourseEntity> list = ExcelImportUtil.importExcel(new File( "d:/tt.xls"), CourseEntity.class, params); ``` 7.和spring mvc的无缝融合 简单几句话,Excel导出搞定 ```Java @RequestMapping(params = "exportXls") public String exportXls(CourseEntity course,HttpServletRequest request,HttpServletResponse response , DataGrid dataGrid,ModelMap map) { CriteriaQuery cq = new CriteriaQuery(CourseEntity.class, dataGrid); org.jeecgframework.core.extend.hqlsearch.HqlGenerateUtil.installHql(cq, course, request.getParameterMap()); List<CourseEntity> courses = this.courseService.getListByCriteriaQuery(cq,false); map.put(NormalExcelConstants.FILE_NAME,"用户信息"); map.put(NormalExcelConstants.CLASS,CourseEntity.class); map.put(NormalExcelConstants.PARAMS,new ExportParams("课程列表", "导出人:Jeecg", "导出信息")); map.put(NormalExcelConstants.DATA_LIST,courses); return NormalExcelConstants.JEECG_EXCEL_VIEW; } ``` 8.Excel导入校验,过滤不符合规则的数据,追加错误信息到Excel,提供常用的校验规则,已经通用的校验接口 ```Java @Excel(name = "Email", width = 25) @Max(value = 15,message = "max 最大值不能超过15") private int email; /** * 手机号 */ @Excel(name = "Mobile", width = 20) @NotNull private String mobile; ExcelImportResult<ExcelVerifyEntity> result = ExcelImportUtil.importExcelVerify(new File( "d:/tt.xls"), ExcelVerifyEntity.class, params); for (int i = 0; i < result.getList().size(); i++) { System.out.println(ReflectionToStringBuilder.toString(result.getList().get(i))); } ``` 9.导入Map 设置导入参数,传入文件或者流,即可获得相应的list,自定义Key,需要实现IExcelDataHandler接口 ```Java ImportParams params = new ImportParams(); List<Map<String,Object>> list = ExcelImportUtil.importExcel(new File( "d:/tt.xls"), Map.class, params); ``` 10.大数据量Excel导出 exportBigExcel 的方法 ,最后可以关闭closeExportBigExcel 也可以不关闭 11.如果View不起作用,已经发现被其他View处理掉的情况,使用下面这个,进行了统一封装,相同的效果 ```Java PoiBaseView public static void render(Map<String, Object> model, HttpServletRequest request, HttpServletResponse response, String viewName) { PoiBaseView view = null; if (BigExcelConstants.BIG_EXCEL_VIEW.equals(viewName)) { view = new BigExcelExportView(); } else if (MapExcelConstants.JEECG_MAP_EXCEL_VIEW.equals(viewName)) { view = new JeecgMapExcelView(); } else if (NormalExcelConstants.JEECG_EXCEL_VIEW.equals(viewName)) { view = new JeecgSingleExcelView(); } else if (TemplateExcelConstants.JEECG_TEMPLATE_EXCEL_VIEW.equals(viewName)) { view = new JeecgTemplateExcelView(); } else if (MapExcelGraphConstants.MAP_GRAPH_EXCEL_VIEW.equals(viewName)) { view = new MapGraphExcelView(); } try { view.renderMergedOutputModel(model, request, response); } catch (Exception e) { LOGGER.error(e.getMessage(), e); } } // Demo @RequestMapping(params = "exportXls") public void exportXls(CourseEntity course,HttpServletRequest request,HttpServletResponse response , DataGrid dataGrid,ModelMap map) { CriteriaQuery cq = new CriteriaQuery(CourseEntity.class, dataGrid); org.jeecgframework.core.extend.hqlsearch.HqlGenerateUtil.installHql(cq, course, request.getParameterMap()); List<CourseEntity> courses = this.courseService.getListByCriteriaQuery(cq,false); map.put(NormalExcelConstants.FILE_NAME,"用户信息"); map.put(NormalExcelConstants.CLASS,CourseEntity.class); map.put(NormalExcelConstants.PARAMS,new ExportParams("课程列表", "导出人:Jeecg", "导出信息")); map.put(NormalExcelConstants.DATA_LIST,courses); PoiBaseView.render(map,request,response,NormalExcelConstants.JEECG_EXCEL_VIEW); } ```