EasyExcel自定义导出数据

刺骨的言语ヽ痛彻心扉 2024-03-25 20:32 19阅读 0赞

**自定义类**

import cn.hutool.db.sql.Condition;
    import com.baomidou.mybatisplus.annotation.EnumValue;
    import io.swagger.models.ExternalDocs;
    import lombok.AllArgsConstructor;
    import lombok.Getter;
    
    import java.util.Arrays;
    import java.util.Objects;
    import java.util.stream.Stream;
    
    
    @Getter
    @AllArgsConstructor
    public enum TowardEnum {
    
        /**
         * 未知
         */
        UNKNOWN(0, "未知"),
        /**
         * 东
         */
        NORTH(1,"东"),
        /**
         * 南
         */
        SOUTH(2,"南"),
        /**
         * 西
         */
        EAST(3,"西"),
        /**
         * 北
         */
        WEST(4,"北"),
        /**
         * 东南
         */
        SOUTHEAST(5,"东南"),
        /**
         * 西南
         */
        SOUTHWEST(6,"西南"),
        /**
         * 东北
         */
        NORTHEAST(7,"东北"),
        /**
         * 西北
         */
        NORTHWEST(8,"西北");
    
        @EnumValue
        private final Integer id;
        private final String desc;
    
        public static String getToward(Integer id) {
            return Arrays.stream(TowardEnum.values()).filter(e -> Objects.equals(e.id, id)).map(e -> e.desc).findFirst().orElse("");
        }
    
    }

**Converter**

import cn.gcfc.admin.enums.house.TowardEnum;
    import com.alibaba.excel.converters.Converter;
    import com.alibaba.excel.converters.ReadConverterContext;
    import com.alibaba.excel.converters.WriteConverterContext;
    import com.alibaba.excel.enums.CellDataTypeEnum;
    import com.alibaba.excel.metadata.data.WriteCellData;
    
    public class TowardConverter implements Converter<TowardEnum> {
    
        @Override
        public Class<?> supportJavaTypeKey() {
            return TowardEnum.class;
        }
    
        @Override
        public CellDataTypeEnum supportExcelTypeKey() {
            return CellDataTypeEnum.STRING;
        }
    
        // 导入用 
        @Override
        public TowardEnum convertToJavaData(ReadConverterContext<?> context) {
            String stringValue = context.getReadCellData().getStringValue();
            TowardEnum TowardEnum = null;
            switch (stringValue){
                case "东" :
                    return TowardEnum.NORTH;
                case "南":
                    return TowardEnum.SOUTH;
                case "西":
                    return TowardEnum.EAST;
                case "北":
                    return TowardEnum.WEST;
                case "东南":
                    return TowardEnum.SOUTHEAST;
                case "西南":
                    return TowardEnum.SOUTHWEST;
                case "东北":
                    return TowardEnum.NORTHEAST;
                case "西北":
                    return TowardEnum.NORTHWEST;
                default:
                    return TowardEnum.UNKNOWN;
            }
        }
    
        // 导出用
        @Override
        public WriteCellData<?> convertToExcelData(WriteConverterContext<TowardEnum> context) {
            TowardEnum value = context.getValue();
            Integer type = value.getId();
            String string = null;
            switch (type){
                case 1:
                    string = TowardEnum.NORTH.getDesc();
                    break;
                case 2:
                    string = TowardEnum.SOUTH.getDesc();
                    break;
                case 3:
                    string = TowardEnum.EAST.getDesc();
                    break;
                case 4:
                    string = TowardEnum.WEST.getDesc();
                    break;
                case 5:
                    string = TowardEnum.SOUTHEAST.getDesc();
                    break;
                case 6:
                    string = TowardEnum.SOUTHWEST.getDesc();
                    break;
                case 7:
                    string = TowardEnum.NORTHEAST.getDesc();
                    break;
                case 8:
                    string = TowardEnum.NORTHWEST.getDesc();
                    break;
                default:
                    string = TowardEnum.UNKNOWN.getDesc();
                    break;
            }
            return new WriteCellData<>(string);
        }
    
    }

**VO**

import com.alibaba.excel.annotation.ExcelProperty;
    
    @Data
    @ApiModel(value = "房间信息")
    public class RoomVO {
    
        // 默认输出name()
        @ExcelProperty(converter = TowardConverter.class)
        @ApiModelProperty(value = "房间朝向")
        private TowardEnum toward;
    
    }