fix: 增加导出excel工具类
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tangwei
parent
a69695bafc
commit
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82
backend/src/main/java/com/yfd/platform/annotation/Excel.java
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82
backend/src/main/java/com/yfd/platform/annotation/Excel.java
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@ -0,0 +1,82 @@
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package com.yfd.platform.annotation;
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import java.lang.annotation.ElementType;
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import java.lang.annotation.Retention;
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import java.lang.annotation.RetentionPolicy;
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import java.lang.annotation.Target;
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/**
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* 通用 Excel 导出列注解（参考若依 RuoYi 的 @Excel 设计）
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* <p>标注在实体字段上，配合 {@code ExcelUtil<T>} 即可实现该字段的导出。
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* 支持的转换能力：字典翻译（dictType）、静态值转换（readConverterExp）、日期格式化。</p>
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* <pre>
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* @Excel(name = "性别", dictType = "sys_user_sex", sort = 3)
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* private Integer gender;
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*
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* @Excel(name = "状态", readConverterExp = "0=停用,1=正常", sort = 5)
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* private Integer status;
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*
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* @Excel(name = "创建时间", dateFormat = "yyyy-MM-dd HH:mm:ss", sort = 6)
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* private LocalDateTime createTime;
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* </pre>
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*/
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@Retention(RetentionPolicy.RUNTIME)
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@Target(ElementType.FIELD)
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public @interface Excel {
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/**
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* 导出列名（Excel 表头）
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*/
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String name();
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/**
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* 列排序（数值越小越靠前；未标注 sort 的字段按声明顺序排在其后）
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*/
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int sort() default Integer.MAX_VALUE;
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/**
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* 字典类型：如 "sys_user_sex"，导出时自动将字典值翻译为字典标签
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* （复用项目 DictCache 缓存，无需额外查询）
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*/
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String dictType() default "";
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/**
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* 静态转换表达式：如 "0=正常,1=停用"（逗号分隔，等号前为值、后为标签）
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* 优先级高于 {@link #dictType()}
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*/
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String readConverterExp() default "";
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/**
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* 日期格式（支持 java.util.Date、LocalDate、LocalDateTime）
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*/
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String dateFormat() default "yyyy-MM-dd HH:mm:ss";
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/**
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* 列宽（字符数），0 表示根据表头与内容自动计算
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*/
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int width() default 0;
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/**
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* 是否导出该列
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*/
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boolean isExport() default true;
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/**
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* 对齐方式
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*/
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Align align() default Align.AUTO;
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/**
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* 单元格对齐
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*/
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enum Align {
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/** 自动（文本左对齐、数值右对齐） */
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AUTO,
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/** 左对齐 */
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LEFT,
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/** 居中 */
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CENTER,
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/** 右对齐 */
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RIGHT
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}
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}
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@ -7,11 +7,15 @@ import com.yfd.platform.qgc_base.domain.SdWtBH;
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import com.yfd.platform.qgc_base.domain.SdEngInfoBHOperateRequest;
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import com.yfd.platform.qgc_base.service.ISdWtBHService;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import com.yfd.platform.utils.ExcelUtil;
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import io.swagger.v3.oas.annotations.Operation;
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import io.swagger.v3.oas.annotations.tags.Tag;
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import jakarta.annotation.Resource;
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import jakarta.servlet.http.HttpServletResponse;
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import org.springframework.web.bind.annotation.*;
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import java.io.IOException;
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@RestController
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@RequestMapping("/base/wt")
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@Tag(name = "水温站管理")
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@ -51,4 +55,11 @@ public class SdWtBHController {
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boolean result = service.delete(request == null ? null : request.getIds(), request == null ? null : request.getSource());
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return result ? ResponseResult.success("删除成功") : ResponseResult.error("删除失败");
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}
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@PostMapping("/export")
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@Operation(summary = "水温站导出")
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public void export(@RequestBody DataSourceRequest request, HttpServletResponse response) throws IOException {
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Page<SdWtBH> page = service.queryPageList(request);
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new ExcelUtil<>(SdWtBH.class).exportExcel(response, page.getRecords(), "水温站数据", "水温站导出");
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}
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}
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@ -5,6 +5,7 @@ import com.baomidou.mybatisplus.annotation.TableField;
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import com.baomidou.mybatisplus.annotation.TableId;
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import com.baomidou.mybatisplus.annotation.TableName;
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import com.fasterxml.jackson.annotation.JsonFormat;
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import com.yfd.platform.annotation.Excel;
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import com.yfd.platform.annotation.FieldChinese;
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import lombok.Data;
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@ -23,15 +24,18 @@ public class SdWtBH implements Serializable {
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/** 水温站站码 */
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@TableId(type = IdType.INPUT)
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@FieldChinese("水温站站码")
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@Excel(name = "水温站站码")
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private String stcd;
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/** 数据时间 */
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@JsonFormat(pattern = "yyyy-MM-dd HH:mm:ss", timezone = "GMT+8")
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@FieldChinese("数据时间")
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@Excel(name="数据时间")
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private Date tm;
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/** 水温站站名 */
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@FieldChinese("水温站站名")
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@Excel(name="水温站站名")
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private String stnm;
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/** 站类 */
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@ -39,38 +43,47 @@ public class SdWtBH implements Serializable {
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private String sttp;
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@TableField(exist = false)
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@Excel(name="站类")
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private String sttpName;
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/** 经度 */
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@FieldChinese("经度")
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@Excel(name="经度")
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private BigDecimal lgtd;
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/** 纬度 */
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@FieldChinese("纬度")
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@Excel(name="纬度")
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private BigDecimal lttd;
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/** 高程 */
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@FieldChinese("高程")
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@Excel(name = "高程")
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private BigDecimal elev;
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/** 站址 */
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@FieldChinese("站址")
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@Excel(name="站址")
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private String stlc;
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/** 测站来源 */
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@FieldChinese("测站来源")
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@Excel(name="测站来源")
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private String stsr;
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/** 水温监测断面设备类型：1=浮动式 2=固定式 */
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@FieldChinese("水温监测断面设备类型")
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@Excel(name="水温监测断面设备类型")
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private Integer wtDeviceType;
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/** 水温监测断面类型 */
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@FieldChinese("水温监测断面类型")
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@Excel(name="水温监测断面类型")
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private String wtType;
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/** 电站水温结构类型 */
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@FieldChinese("电站水温结构类型")
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@Excel(name="电站水温结构类型")
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private String wts;
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/** 固定垂向水温类型：1=相对位置 2=高程 */
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@ -2620,7 +2620,7 @@ public class WarnDataServiceImpl implements WarnDataService {
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}
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String stcd = ao.getDvcd().trim();
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String tm = DateUtil.formatDateTime(ao.getAitime());
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String remarkJson = JSONUtil.toJsonStr(ao.getAidata());
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// String remarkJson = JSONUtil.toJsonStr(ao.getAidata());
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switch (ao.getType()) {
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case "0000":
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// ai心跳数据
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@ -2634,12 +2634,12 @@ public class WarnDataServiceImpl implements WarnDataService {
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aicomRows.add(new Object[]{
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stcd, tm, "AI_5001",
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ao.getAidata().getArea().toPlainString(),
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ao.getFiles(), remarkJson
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ao.getFiles()
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});
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break;
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case "5011":
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// 漂浮物清理
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aicomRows.add(new Object[]{stcd, tm, "AI_5011", null, ao.getFiles(), remarkJson});
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aicomRows.add(new Object[]{stcd, tm, "AI_5011", null, ao.getFiles()});
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break;
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case "5021":
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// 视频流量
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@ -2647,7 +2647,7 @@ public class WarnDataServiceImpl implements WarnDataService {
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stcd, tm, "AI_5014",
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ao.getAidata() != null && ao.getAidata().getFlow() != null
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? ao.getAidata().getFlow().toPlainString() : null,
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ao.getFiles(), remarkJson
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ao.getFiles()
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});
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break;
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case "AI_RIV":
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@ -2656,7 +2656,7 @@ public class WarnDataServiceImpl implements WarnDataService {
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aicomRows.add(new Object[]{
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stcd, tm, ao.getType(),
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ao.getAidata() != null ? ao.getAidata().getValue() : null,
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ao.getFiles(), remarkJson
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ao.getFiles()
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});
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break;
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default:
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@ -2678,7 +2678,7 @@ public class WarnDataServiceImpl implements WarnDataService {
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sql.append(" UNION ALL ");
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}
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sql.append("SELECT ? AS STCD, TO_DATE(?, 'YYYY-MM-DD HH24:MI:SS') AS TM, ")
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.append("? AS TYPE, ? AS AI_VAL, ? AS FID, ? AS REMARK FROM DUAL");
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.append("? AS TYPE, ? AS AI_VAL, ? AS FID AS REMARK FROM DUAL");
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}
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sql.append(") source ON (target.STCD = source.STCD AND target.TM = source.TM AND target.TYPE = source.TYPE) ")
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.append("WHEN NOT MATCHED THEN INSERT (STCD, TM, TYPE, AI_VAL, FID, REMARK, RECORD_TIME, IS_DELETED) ")
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288
backend/src/main/java/com/yfd/platform/utils/ExcelUtil.java
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288
backend/src/main/java/com/yfd/platform/utils/ExcelUtil.java
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package com.yfd.platform.utils;
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import com.yfd.platform.annotation.Excel;
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import jakarta.servlet.http.HttpServletResponse;
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import lombok.extern.slf4j.Slf4j;
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import org.apache.poi.ss.usermodel.BorderStyle;
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import org.apache.poi.ss.usermodel.Cell;
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import org.apache.poi.ss.usermodel.CellStyle;
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import org.apache.poi.ss.usermodel.FillPatternType;
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import org.apache.poi.ss.usermodel.Font;
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import org.apache.poi.ss.usermodel.HorizontalAlignment;
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import org.apache.poi.ss.usermodel.IndexedColors;
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import org.apache.poi.ss.usermodel.Row;
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import org.apache.poi.ss.usermodel.Sheet;
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import org.apache.poi.ss.usermodel.VerticalAlignment;
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import org.apache.poi.ss.util.CellRangeAddress;
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import org.apache.poi.xssf.streaming.SXSSFWorkbook;
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import org.apache.poi.xssf.usermodel.XSSFCellStyle;
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import org.apache.poi.xssf.usermodel.XSSFColor;
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import java.io.IOException;
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import java.io.OutputStream;
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import java.lang.reflect.Field;
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import java.net.URLEncoder;
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import java.nio.charset.StandardCharsets;
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import java.text.SimpleDateFormat;
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import java.time.LocalDate;
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import java.time.LocalDateTime;
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import java.time.format.DateTimeFormatter;
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import java.util.Arrays;
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import java.util.Comparator;
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import java.util.Date;
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import java.util.List;
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import java.util.stream.Collectors;
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/**
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* 通用 Excel 导出工具（参考若依 RuoYi 的 ExcelUtil 设计）
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* <p>
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* 使用方法：
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* <ol>
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* <li>在实体字段上标注 {@link Excel} 注解，声明列名、排序、字典翻译、日期格式等；</li>
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* <li>Controller 中按需查询数据后调用：<pre>
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* List<SysUser> list = sysUserService.list(wrapper);
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* new ExcelUtil<>(SysUser.class).exportExcel(response, list, "用户数据", "用户数据");
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* </pre></li>
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* </ol>
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* 特性：流式写出（SXSSF，适合大数据量）、表头冻结与自动筛选、列宽自适应、
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* 字典翻译（复用 DictCache）、静态值转换（readConverterExp）、日期格式化、Long 转字符串避免精度丢失。
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*/
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@Slf4j
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public class ExcelUtil<T> {
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/** 表头背景色（中蓝色 RGB） */
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private static final byte[] HEADER_BG = {(byte) 0x4A, (byte) 0x86, (byte) 0xC8};
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/** 列宽上限（字符数），防止超长内容撑爆表格 */
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private static final int MAX_COLUMN_WIDTH = 50;
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private final Class<T> clazz;
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/** 参与导出的字段列表（已按 @Excel.sort 升序排列，仅保留 isExport=true） */
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private final List<Field> exportFields;
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public ExcelUtil(Class<T> clazz) {
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this.clazz = clazz;
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this.exportFields = Arrays.stream(clazz.getDeclaredFields())
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.filter(f -> f.isAnnotationPresent(Excel.class))
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.filter(f -> f.getAnnotation(Excel.class).isExport())
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.sorted(Comparator.comparingInt(f -> f.getAnnotation(Excel.class).sort()))
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.collect(Collectors.toList());
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if (exportFields.isEmpty()) {
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log.warn("ExcelUtil: 类 {} 未配置任何 @Excel 导出字段", clazz.getName());
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}
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}
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// ==================== 对外 API ====================
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/**
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* 导出 Excel 到 HTTP 响应（自动设置 Content-Type 与文件名编码）
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*
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* @param response HTTP 响应
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* @param list 待导出数据
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* @param sheetName 工作表名称
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* @param fileName 下载文件名（不含扩展名）
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*/
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public void exportExcel(HttpServletResponse response, List<T> list, String sheetName, String fileName) throws IOException {
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response.setContentType("application/vnd.openxmlformats-officedocument.spreadsheetml.sheet");
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response.setCharacterEncoding("utf-8");
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String encoded = URLEncoder.encode(fileName, StandardCharsets.UTF_8).replace("\\+", "%20");
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response.setHeader("Content-Disposition", "attachment;filename*=UTF-8''" + encoded + ".xlsx");
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exportExcel(response.getOutputStream(), list, sheetName);
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}
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/**
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* 导出 Excel 到输出流（xlsx 格式）
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*
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* @param out 输出流
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* @param list 待导出数据
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* @param sheetName 工作表名称
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*/
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public void exportExcel(OutputStream out, List<T> list, String sheetName) throws IOException {
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// SXSSF 流式写出：内存中只保留 100 行，适合大批量导出
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try (SXSSFWorkbook workbook = new SXSSFWorkbook(100)) {
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writeSheet(workbook, sheetName, list);
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workbook.write(out);
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workbook.dispose();
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}
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}
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// ==================== 内部实现 ====================
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private void writeSheet(SXSSFWorkbook workbook, String sheetName, List<T> list) {
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String safeName = sanitizeSheetName(sheetName);
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Sheet sheet = workbook.createSheet(safeName);
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int columnCount = exportFields.size();
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CellStyle headerStyle = buildHeaderStyle(workbook);
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CellStyle dataLeft = buildDataStyle(workbook, HorizontalAlignment.LEFT);
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CellStyle dataCenter = buildDataStyle(workbook, HorizontalAlignment.CENTER);
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CellStyle dataRight = buildDataStyle(workbook, HorizontalAlignment.RIGHT);
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int[] colMaxLen = new int[columnCount];
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// 1. 表头行
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Row headerRow = sheet.createRow(0);
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for (int i = 0; i < columnCount; i++) {
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Excel excel = exportFields.get(i).getAnnotation(Excel.class);
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Cell cell = headerRow.createCell(i);
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cell.setCellValue(excel.name());
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cell.setCellStyle(headerStyle);
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colMaxLen[i] = displayLength(excel.name());
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}
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// 冻结表头，滚动时保持可见
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sheet.createFreezePane(0, 1);
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// 2. 数据行
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int dataRows = list == null ? 0 : list.size();
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for (int r = 0; r < dataRows; r++) {
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Row row = sheet.createRow(r + 1);
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T entity = list.get(r);
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for (int i = 0; i < columnCount; i++) {
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Field field = exportFields.get(i);
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String text = convertToString(field, entity);
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Cell cell = row.createCell(i);
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cell.setCellValue(text);
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cell.setCellStyle(chooseDataStyle(field, dataLeft, dataCenter, dataRight));
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int len = displayLength(text);
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if (len > colMaxLen[i]) {
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colMaxLen[i] = len;
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}
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}
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}
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// 3. 列宽：注解指定优先，否则按内容自适应
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for (int i = 0; i < columnCount; i++) {
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Excel excel = exportFields.get(i).getAnnotation(Excel.class);
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int width = excel.width() > 0 ? excel.width() : Math.min(colMaxLen[i] + 2, MAX_COLUMN_WIDTH);
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sheet.setColumnWidth(i, width * 256);
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}
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// 4. 自动筛选（表头 + 数据区）
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if (columnCount > 0) {
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sheet.setAutoFilter(new CellRangeAddress(0, Math.max(dataRows, 0), 0, columnCount - 1));
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}
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}
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||||
|
||||
/**
|
||||
* 将实体字段值转换为 Excel 单元格字符串
|
||||
*/
|
||||
private String convertToString(Field field, Object entity) {
|
||||
Excel excel = field.getAnnotation(Excel.class);
|
||||
Object value = getFieldValue(field, entity);
|
||||
if (value == null) {
|
||||
return "";
|
||||
}
|
||||
String strValue = String.valueOf(value);
|
||||
|
||||
// 1. 静态转换表达式优先：如 "0=停用,1=正常"
|
||||
if (!excel.readConverterExp().isEmpty()) {
|
||||
for (String item : excel.readConverterExp().split(",")) {
|
||||
String[] kv = item.split("=");
|
||||
if (kv.length == 2 && kv[0].trim().equals(strValue)) {
|
||||
return kv[1].trim();
|
||||
}
|
||||
}
|
||||
return strValue;
|
||||
}
|
||||
|
||||
// 2. 字典翻译：如 dictType="sys_user_sex" → 字典标签
|
||||
// if (!excel.dictType().isEmpty()) {
|
||||
// try {
|
||||
// String label = SpringUtils.getBean(DictCache.class).getLabel(excel.dictType(), value);
|
||||
// if (label != null) {
|
||||
// return label;
|
||||
// }
|
||||
// } catch (Exception e) {
|
||||
// log.warn("Excel 字典翻译失败: dictType={}, value={}, err={}", excel.dictType(), value, e.getMessage());
|
||||
// }
|
||||
// }
|
||||
|
||||
// 3. 日期格式化
|
||||
if (value instanceof LocalDateTime localDateTime) {
|
||||
return localDateTime.format(DateTimeFormatter.ofPattern(excel.dateFormat()));
|
||||
}
|
||||
if (value instanceof LocalDate localDate) {
|
||||
return localDate.format(DateTimeFormatter.ofPattern(excel.dateFormat()));
|
||||
}
|
||||
if (value instanceof Date date) {
|
||||
return new SimpleDateFormat(excel.dateFormat()).format(date);
|
||||
}
|
||||
|
||||
// 4. 默认（Long 直接转字符串，避免 Excel 科学计数法与前端精度丢失）
|
||||
return strValue;
|
||||
}
|
||||
|
||||
private Object getFieldValue(Field field, Object entity) {
|
||||
try {
|
||||
field.setAccessible(true);
|
||||
return field.get(entity);
|
||||
} catch (IllegalAccessException e) {
|
||||
log.warn("Excel 读取字段值失败: field={}, err={}", field.getName(), e.getMessage());
|
||||
return null;
|
||||
}
|
||||
}
|
||||
|
||||
/**
|
||||
* 根据注解对齐方式选择数据单元格样式
|
||||
*/
|
||||
private CellStyle chooseDataStyle(Field field, CellStyle left, CellStyle center, CellStyle right) {
|
||||
Excel.Align align = field.getAnnotation(Excel.class).align();
|
||||
return switch (align) {
|
||||
case CENTER -> center;
|
||||
case RIGHT -> right;
|
||||
case AUTO, LEFT -> left;
|
||||
};
|
||||
}
|
||||
|
||||
private CellStyle buildHeaderStyle(SXSSFWorkbook workbook) {
|
||||
// SXSSF 底层为 XSSFWorkbook，样式均为 XSSFCellStyle，可直接设置自定义 RGB 颜色
|
||||
XSSFCellStyle style = (XSSFCellStyle) workbook.createCellStyle();
|
||||
style.setAlignment(HorizontalAlignment.CENTER);
|
||||
style.setVerticalAlignment(VerticalAlignment.CENTER);
|
||||
setBorders(style);
|
||||
style.setFillForegroundColor(new XSSFColor(HEADER_BG, null));
|
||||
style.setFillPattern(FillPatternType.SOLID_FOREGROUND);
|
||||
Font font = workbook.createFont();
|
||||
font.setBold(true);
|
||||
font.setColor(IndexedColors.WHITE.getIndex());
|
||||
font.setFontHeightInPoints((short) 11);
|
||||
style.setFont(font);
|
||||
return style;
|
||||
}
|
||||
|
||||
private CellStyle buildDataStyle(SXSSFWorkbook workbook, HorizontalAlignment alignment) {
|
||||
CellStyle style = workbook.createCellStyle();
|
||||
style.setAlignment(alignment);
|
||||
style.setVerticalAlignment(VerticalAlignment.CENTER);
|
||||
setBorders(style);
|
||||
return style;
|
||||
}
|
||||
|
||||
private void setBorders(CellStyle style) {
|
||||
style.setBorderTop(BorderStyle.THIN);
|
||||
style.setBorderBottom(BorderStyle.THIN);
|
||||
style.setBorderLeft(BorderStyle.THIN);
|
||||
style.setBorderRight(BorderStyle.THIN);
|
||||
}
|
||||
|
||||
/**
|
||||
* 计算字符串显示宽度（中文字符按 2 个字符宽度计）
|
||||
*/
|
||||
private int displayLength(String s) {
|
||||
if (s == null || s.isEmpty()) {
|
||||
return 0;
|
||||
}
|
||||
int len = 0;
|
||||
for (int i = 0; i < s.length(); i++) {
|
||||
len += s.charAt(i) > 0xFF ? 2 : 1;
|
||||
}
|
||||
return len;
|
||||
}
|
||||
|
||||
/**
|
||||
* 过滤 Excel 工作表名非法字符（[]:*?/\ 等）
|
||||
*/
|
||||
private String sanitizeSheetName(String name) {
|
||||
String safe = name == null || name.isBlank() ? "Sheet1" : name.replaceAll("[\\[\\]:*?/\\\\]", "_");
|
||||
return safe.length() > 31 ? safe.substring(0, 31) : safe;
|
||||
}
|
||||
}
|
||||
Loading…
Reference in New Issue
Block a user