EasyPoi通用導出excel

EasyPoi的主要特點

1.設計精巧,使用簡單
2.接口豐富,擴展簡單
3.默認值多,write less do more
4.spring mvc支持,web導出可以簡單明瞭

公共方法導出數據到excel，共用查詢請求回顯對象，查詢方法，戴錶頭，可設置每列寬度。
導出格式如下

1，pom引入

      <!-- Excel報表導出 -->
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-base</artifactId>
            <version>${easypoi.version}</version>
        </dependency>
        <dependency>
            <groupId>cn.afterturn</groupId>
            <artifactId>easypoi-annotation</artifactId>
            <version>${easypoi.version}</version>
        </dependency>

2，導出工具類

public class PoiUtils {

    /**
     * 動態表頭
     *
     * @param fileName
     * @param list
     * @param response
     * @param title
     * @param colList
     */
    public static void exportExcelDynamicHeader(String fileName, List list, HttpServletResponse response, String title, List<ExcelExportEntity> colList) {
        try {
            response.setContentType("application/application/vnd.ms-excel");
            response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(fileName + ".xls", "UTF-8"));
            if (list != null) {
                ExportParams params = new ExportParams(title, "數據");
                // 如果表頭長度大於256，修改成office 2007以上版本
                if(colList.size() > 256){
                    params.setType(ExcelType.XSSF);
                }
                Workbook workbook = ExcelExportUtil.exportExcel(params, colList, list);
                ServletOutputStream outputStream = response.getOutputStream();
                workbook.write(outputStream);
                workbook.close();
                outputStream.flush();// 刷新流
                outputStream.close();// 關閉流
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

    /**
     * 固定表頭數據導出
     * @param fileName
     * @param list
     * @param response
     * @param pojoClass
     */
    public static void exportExcel(String fileName, List list, HttpServletResponse response, Class<?> pojoClass) {
        try {
            response.setContentType("application/application/vnd.ms-excel");
            response.setHeader("Content-disposition", "attachment;filename=" + URLEncoder.encode(fileName + ".xls", "UTF-8"));
            if (list != null) {
                Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams(fileName, "sheet0"), pojoClass, list);
                ServletOutputStream outputStream = response.getOutputStream();
                workbook.write(outputStream);
                workbook.close();
                outputStream.flush();// 刷新流
                outputStream.close();// 關閉流
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

3，查詢返回對象實體添加導出excel註解

@Data
@ExcelTarget("產品信息")
public class ExportProductExcel implements Serializable {
    private static final long serialVersionUID = 212788451654665885L;
    @Excel(name = "編碼", orderNum = "1", width = 20, needMerge = true)
    private String code;
    @Excel(name = "名稱", orderNum = "2", width = 56, needMerge = true)
    private String name;
    @Excel(name = "重量kg", orderNum = "3", width = 15, needMerge = true)
    private Double weight;
    @Excel(name = "體積m3", orderNum = "4", width = 15, needMerge = true)
    private Double volume;
    
    //報表隱藏字段或不導出的字段
    private String factoryCode;
    private String brandCode;
}

4，查詢和導出控制器

    /**
     * 分頁查詢產品信息
     * @param productSelectQO
     */
    @ResponseBody
    @PostMapping("report")
    public Result report(@RequestBody ProductSelectQO productSelectQO) {
        PageHelper.startPage(productSelectQO.getPage(), productSelectQO.getPageSize());
        List<ExportProductExcel> list =  productManService.selectOfExcel(productSelectQO);
        PageResultSet<ExportProductExcel> resultSet = PageResultSet.fromList(list);
        return Result.success(resultSet);
    }
    
    /**
     * 導出所有查詢的產品信息
     * @param productSelectQO
     * @param response
     */
    @ResponseBody
    @PostMapping("export")
    public void export(@RequestBody ProductSelectQO productSelectQO,HttpServletResponse response) {
        List<ExportProductExcel> list =  productManService.selectOfExcel(productSelectQO);
        PoiUtils.exportExcel("外購產品表" ,list,response, ExportProductExcel.class);
    }