easyPoi 注解导出 动态隐藏列

easyPoi 注解导出 动态隐藏列

1.先写个poi工具类

/**
 * 动态显示Excel导出列
 * @param 
 */
public class EasyPoiUtil {


    /**
     * 需要被反射的对象，使用泛型规范传入对象
     */
    public T t;

    /**
     * 动态更改EasyPoi中控制列显示的值 * * @param columnName 需要转换的列属性名称 * @param target     默认true * @throws NoSuchFieldException * @throws IllegalAccessException
     */
    public void hihdColumn(String columnName, Boolean target) throws Exception {
        if (t == null) {
            throw new ClassNotFoundException("TARGET OBJECT NOT FOUNT");
        }
        if (StringUtils.isEmpty(columnName)) {
            throw new NullPointerException("COLUMN NAME NOT NULL");
        }
        if (target == null) {
            target = true;
        }
        //获取目标对象的属性值
        Field field = t.getClass().getDeclaredField(columnName);
        //获取注解反射对象
        Excel excelAnnon = field.getAnnotation(Excel.class);
        //获取代理
        InvocationHandler invocationHandler = Proxy.getInvocationHandler(excelAnnon);
        Field excelField = invocationHandler.getClass().getDeclaredField("memberValues");
        excelField.setAccessible(true);
        Map memberValues = (Map) excelField.get(invocationHandler);
        memberValues.put("isColumnHidden", target);

    }
}

2.controller 中设置

    @GetMapping("/export")
    public BaseResult export(SysPost post) {
        List list = postService.selectPostList(post);

        /**
         *  动态隐藏 列
         */
        for (SysPost item : list){
            EasyPoiUtil easyPoiUtil = new EasyPoiUtil();
            easyPoiUtil.t = item;
            try {
                //隐藏bean 字段为postId的列
                easyPoiUtil.hihdColumn("postId", true);
            } catch (Exception e) {
                log.info("列隐藏转换失败：{}", e.getMessage());
                e.printStackTrace();
            }
        }
        
        Workbook workbook = ExcelExportUtil.exportExcel(new ExportParams("岗位管理表", "岗位管理", ExcelType.XSSF),
                SysPost.class, list);
        return ExcelUtil.exportExcel(workbook, "岗位数据");
    }

3.bean代码如下

@Data
public class SysPost extends BaseEntity
{
    private static final long serialVersionUID = 1L;

    /** 岗位序号 */
    @Excel(name = "岗位序号",orderNum = "1",width = 20)
    private Long postId;

    /** 岗位编码 */
    @Excel(name = "岗位编码",orderNum = "2",width = 20)
    @NotBlank(message = "岗位编码不能为空")
    @Size(min = 0, max = 64, message = "岗位编码长度不能超过64个字符")
    private String postCode;

    /** 岗位名称 */
    @Excel(name = "岗位名称",orderNum = "3",width = 20)
    @NotBlank(message = "岗位名称不能为空")
    @Size(min = 0, max = 50, message = "岗位名称长度不能超过50个字符")
    private String postName;

    /** 岗位排序 */
    @Excel(name = "岗位排序",orderNum = "4",width = 10)
    @NotBlank(message = "显示顺序不能为空")
    private String postSort;

    /** 状态（0正常 1停用） */
    @Excel(name = "状态",orderNum = "5",width = 20,replace = {"正常_0","停用_1"})
    private String status;
}