import java.lang.annotation.*;

@Documented
@Retention(RetentionPolicy.RUNTIME)
@Target({ElementType.METHOD, ElementType.FIELD, ElementType.PARAMETER})
public @interface ExcelStyle {

    int width() default 0;
}

/**
 * 聊天记录
 */
@Data
public class DialogContentInfo {

    /**
     * 群ID
     */
    @Alias("群ID")
    @ExcelStyle(width = 30)
    private String dialogId;

    /**
     * 患者群名
     */
    @Alias("患者群名")
    @ExcelStyle(width = 80)
    private String dialogTitle;

    /**
     * 内容
     */
    @Alias("消息内容")
    @ExcelStyle(width = 120)
    private String content;

    /**
     * 发送人
     */
    @Alias("随访人员")
    @ExcelStyle(width = 25)
    private String nickname;

    /**
     * 时间
     */
    @Alias("时间")
    @ExcelStyle(width = 25)
    private String createdTime;

    /**
     * userId
     */
    @PropIgnore
    private Long userId;
}

    /**
     * 设置excel样式
     */
    private void setExcelStyle(Class<?> clazz, ExcelWriter writer) {
        Field[] fields = ClassUtil.getDeclaredFields(clazz);
        for (int index = 0; index < fields.length; index++) {
            Field field = fields[index];
            ExcelStyle excelStyle = field.getAnnotation(ExcelStyle.class);
            if (excelStyle == null || excelStyle.width() == 0) {
                continue;
            }
            writer.setColumnWidth(index, excelStyle.width());
        }
    }