8 changed files with 576 additions and 93 deletions
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package com.zscat.mallplus.oms.vo; |
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import com.fasterxml.jackson.annotation.JsonIgnore; |
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import com.zscat.mallplus.utils.ExportEntityMap; |
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import lombok.Data; |
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/** |
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* @Author dimengzhe |
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* @Date 2023/3/27 8:47 |
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* @Description |
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*/ |
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@Data |
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public class OrderExcelVo { |
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@ExportEntityMap(CnName = "订单编号", EnName = "orderSn") |
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private String orderSn; |
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@ExportEntityMap(CnName = "下单日期", EnName = "createTime") |
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private String createTime; |
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@ExportEntityMap(CnName = "手机号", EnName = "receiverPhone") |
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private String receiverPhone; |
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@ExportEntityMap(CnName = "用户名", EnName = "memberUsername") |
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private String memberUsername; |
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@ExportEntityMap(CnName = "商品名称", EnName = "goodsName") |
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private String goodsName; |
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@ExportEntityMap(CnName = "价格", EnName = "totalAmount") |
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private String totalAmount; |
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@ExportEntityMap(CnName = "数量", EnName = "productQuantity") |
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private String productQuantity; |
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@ExportEntityMap(CnName = "取货点", EnName = "receiverDetailAddress") |
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private String receiverDetailAddress; |
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@ExportEntityMap(CnName = "订单状态", EnName = "statusName") |
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private String statusName; |
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@JsonIgnore |
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private String storeId; |
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} |
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package com.zscat.mallplus.utils; |
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import java.lang.annotation.*; |
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/** |
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* @author dimengzhe |
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* @date 2020/9/30 17:38 |
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* @description |
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*/ |
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@Target({ElementType.FIELD}) |
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@Retention(RetentionPolicy.RUNTIME) |
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@Documented |
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public @interface ExportEntityMap { |
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String EnName() default "数据库列名"; |
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String CnName() default "实体映射名"; |
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} |
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package com.zscat.mallplus.utils; |
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import org.apache.poi.hssf.usermodel.*; |
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import org.apache.poi.hssf.usermodel.HeaderFooter; |
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import org.apache.poi.ss.usermodel.*; |
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import javax.servlet.http.HttpServletResponse; |
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import java.io.OutputStream; |
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import java.lang.reflect.Field; |
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import java.text.SimpleDateFormat; |
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import java.util.*; |
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/** |
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* @author dimengzhe |
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* @date 2020/9/30 17:02 |
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* @description |
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*/ |
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public class ExportExcelUtils { |
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public static <T> void export(String excelName, List<T> list, Class<T> c, HttpServletResponse response) { |
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// 设置日期格式
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SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd HH：mm：ss"); |
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// 设置默认文件名为当前时间：年月日时分秒
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if (excelName == null || excelName == "") { |
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excelName = df.format(new Date()).toString(); |
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} else { |
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excelName = excelName + df.format(new Date()).toString(); |
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} |
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// 设置response头信息
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response.reset(); |
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// 改成输出excel文件
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response.setContentType("application/vnd.ms-excel"); |
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// response.setHeader("Content-disposition", "attachment; filename="
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// + new String(excelName.getBytes("gb2312"), "ISO-8859-1") + ".xls");
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response.setHeader("Content-Disposition", "attachment;fileName=" |
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+ excelName+".xls"); |
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try { |
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//创建一个WorkBook,对应一个Excel文件
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HSSFWorkbook wb = new HSSFWorkbook(); |
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//在Workbook中，创建一个sheet，对应Excel中的工作薄（sheet）
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HSSFSheet sheet = wb.createSheet(excelName); |
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//设置 边距、页眉、页脚
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HSSFPrintSetup printSetup = sheet.getPrintSetup(); |
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//打印方向，true：横向，false：纵向(默认)
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printSetup.setLandscape(true); |
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printSetup.setHeaderMargin(0.2); |
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printSetup.setFooterMargin(0.2); |
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//设置打印缩放为88%
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//printSetup.setScale((short) 55);
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printSetup.setFitHeight((short) 0); |
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printSetup.setFitWidth((short) 1); |
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// printSetup.setLeftToRight(true);//列从左向右显示②
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// 纸张
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printSetup.setPaperSize(HSSFPrintSetup.A4_PAPERSIZE); |
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// 页边距（下）
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sheet.setMargin(HSSFSheet.BottomMargin, (double) 0.8); |
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// 页边距（左）
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sheet.setMargin(HSSFSheet.LeftMargin, (double) 0); |
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// 页边距（右）
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sheet.setMargin(HSSFSheet.RightMargin, (double) 0); |
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// 页边距（上）
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sheet.setMargin(HSSFSheet.TopMargin, (double) 0.8); |
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//设置打印页面为水平居中
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sheet.setHorizontallyCenter(true); |
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sheet.setVerticallyCenter(true); |
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sheet.setAutobreaks(false); |
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sheet.setFitToPage(false); |
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Footer footer = sheet.getFooter(); |
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//设置页数
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footer.setCenter("第" + HeaderFooter.page() + "页，共 " + HeaderFooter.numPages() + "页"); |
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Header header = sheet.getHeader(); |
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//自定义页眉,并设置页眉 左中右显示信息
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//居中
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// header.setCenter("Center Header");
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//靠左
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header.setLeft(HSSFHeader.font("宋体", "") + |
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HSSFHeader.fontSize((short) 16) + excelName + ".xls"); |
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//靠右
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// header.setRight(HSSFHeader.font("Stencil-Normal", "Italic") +
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// HSSFHeader.fontSize((short) 16) + "Right w/ Stencil-Normal Italic font and size 16");
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//创建单元格，并设置值表头 设置表头居中
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HSSFCellStyle style = wb.createCellStyle(); |
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//设置边框
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//下边框
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style.setBorderBottom(BorderStyle.THIN); |
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style.setBorderLeft(BorderStyle.THIN); |
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//上边框
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style.setBorderTop(BorderStyle.THIN); |
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//右边框
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style.setBorderRight(BorderStyle.THIN); |
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//自动换行
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//style.setWrapText(true);
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//创建一个居中格式
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style.setAlignment(HorizontalAlignment.CENTER); |
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//上下居中
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style.setVerticalAlignment(VerticalAlignment.CENTER); |
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//设置字体
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HSSFFont font = wb.createFont(); |
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font.setFontName("宋体"); |
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style.setFont(font); |
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// 填充工作表
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//获取需要转出的excel表头的map字段
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LinkedHashMap<String, String> fieldMap = new LinkedHashMap<>(); |
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//循环注解里面的值 填入Link集合
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Field[] declaredFields = c.getDeclaredFields(); |
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for (Field declaredField : declaredFields) { |
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//获取注解对象
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ExportEntityMap declaredAnnotation = declaredField.getDeclaredAnnotation(ExportEntityMap.class); |
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if (declaredAnnotation != null) { |
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fieldMap.put(declaredAnnotation.EnName(), declaredAnnotation.CnName()); |
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} |
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} |
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fillSheet(sheet, list, fieldMap, style); |
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//将文件输出
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OutputStream ouputStream = response.getOutputStream(); |
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wb.write(ouputStream); |
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ouputStream.flush(); |
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ouputStream.close(); |
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} catch (Exception e) { |
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System.err.println("导出Excel失败！"); |
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System.err.println(e.getMessage()); |
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} |
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} |
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/** |
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* 根据字段名获取字段对象 |
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* |
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* @param fieldName 字段名 |
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* @param clazz 包含该字段的类 |
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* @return 字段 |
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*/ |
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public static Field getFieldByName(String fieldName, Class<?> clazz) { |
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//logger.info("根据字段名获取字段对象:getFieldByName()");
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// 拿到本类的所有字段
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Field[] selfFields = clazz.getDeclaredFields(); |
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// 如果本类中存在该字段，则返回
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for (Field field : selfFields) { |
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//如果本类中存在该字段，则返回
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if (field.getName().equals(fieldName)) { |
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return field; |
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} |
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} |
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// 否则，查看父类中是否存在此字段，如果有则返回
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Class<?> superClazz = clazz.getSuperclass(); |
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if (superClazz != null && superClazz != Object.class) { |
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//递归
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return getFieldByName(fieldName, superClazz); |
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} |
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// 如果本类和父类都没有，则返回空
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return null; |
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} |
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/** |
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* 根据字段名获取字段值 |
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* |
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* @param fieldName 字段名 |
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* @param o 对象 |
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* @return 字段值 |
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* @throws Exception 异常 |
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*/ |
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public static Object getFieldValueByName(String fieldName, Object o) |
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throws Exception { |
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//logger.info("根据字段名获取字段值:getFieldValueByName()");
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Object value = null; |
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//根据字段名得到字段对象
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Field field = getFieldByName(fieldName, o.getClass()); |
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//如果该字段存在，则取出该字段的值
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if (field != null) { |
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//类中的成员变量为private,在类外边使用属性值，故必须进行此操作
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field.setAccessible(true); |
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//获取当前对象中当前Field的value
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value = field.get(o); |
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} else { |
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throw new Exception(o.getClass().getSimpleName() + "类不存在字段名 " |
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+ fieldName); |
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} |
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return value; |
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} |
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/** |
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* 根据带路径或不带路径的属性名获取属性值,即接受简单属性名， |
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* 如userName等，又接受带路径的属性名，如student.department.name等 |
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* |
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* @param fieldNameSequence 带路径的属性名或简单属性名 |
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* @param o 对象 |
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* @return 属性值 |
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* @throws Exception 异常 |
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*/ |
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public static Object getFieldValueByNameSequence(String fieldNameSequence, |
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Object o) throws Exception { |
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// logger.info("根据带路径或不带路径的属性名获取属性值,即接受简单属性名:getFieldValueByNameSequence()");
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Object value = null; |
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// 将fieldNameSequence进行拆分
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String[] attributes = fieldNameSequence.split("\\."); |
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if (attributes.length == 1) { |
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value = getFieldValueByName(fieldNameSequence, o); |
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} else { |
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// 根据数组中第一个连接属性名获取连接属性对象，如student.department.name
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Object fieldObj = getFieldValueByName(attributes[0], o); |
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//截取除第一个属性名之后的路径
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String subFieldNameSequence = fieldNameSequence |
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.substring(fieldNameSequence.indexOf(".") + 1); |
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//递归得到最终的属性对象的值
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value = getFieldValueByNameSequence(subFieldNameSequence, fieldObj); |
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} |
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return value; |
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} |
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/** |
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* 向工作表中填充数据 |
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* |
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* @param sheet excel的工作表名称 |
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* @param list 数据源 |
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* @param fieldMap 中英文字段对应关系的Map |
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* @param style 表格中的格式 |
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* @throws Exception 异常 |
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*/ |
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public static <T> void fillSheet(HSSFSheet sheet, List<T> list, |
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LinkedHashMap<String, String> fieldMap, HSSFCellStyle style) throws Exception { |
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//logger.info("向工作表中填充数据:fillSheet()");
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// 定义存放英文字段名和中文字段名的数组
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String[] enFields = new String[fieldMap.size()]; |
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String[] cnFields = new String[fieldMap.size()]; |
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// 填充数组
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int count = 0; |
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for (Map.Entry<String, String> entry : fieldMap.entrySet()) { |
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enFields[count] = entry.getKey(); |
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cnFields[count] = entry.getValue(); |
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count++; |
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} |
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//存储最大列宽
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Map<Integer, Integer> maxWidth = new HashMap<>(); |
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HSSFRow row = sheet.createRow((int) 0); |
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HSSFCell cell = null; |
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// 填充表头
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for (int i = 0; i < cnFields.length; i++) { |
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cell = row.createCell(i); |
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cell.setCellValue(cnFields[i]); |
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cell.setCellStyle(style); |
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sheet.autoSizeColumn(i); |
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//设置自适应宽高
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maxWidth.put(i, cell.getStringCellValue().getBytes().length * 256 + 200); |
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} |
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// 填充内容
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for (int index = 0; index < list.size(); index++) { |
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row = sheet.createRow(index + 1); |
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// 获取单个对象
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T item = list.get(index); |
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int j = 0; |
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for (int i = 0; i < enFields.length; i++) { |
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HSSFCell createCell = row.createCell(j); |
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Object objValue = getFieldValueByNameSequence(enFields[i], item); |
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String fieldValue = objValue == null ? "" : objValue.toString(); |
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cell = row.createCell(i); |
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createCell.setCellValue(fieldValue); |
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int length = createCell.getStringCellValue().getBytes().length * 256 + 200; |
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//这里把宽度最大限制到15000
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if (length > 15000) { |
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length = 15000; |
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} |
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maxWidth.put(j, Math.max(length, maxWidth.get(j))); |
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j++; |
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createCell.setCellStyle(style); |
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} |
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} |
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// 列宽自适应
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for (int i = 0; i < cnFields.length; i++) { |
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sheet.setColumnWidth(i, maxWidth.get(i)); |
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} |
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} |
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} |
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