1. 使用方法
1.1 对象使用注解
@ExcelColumn(name = "页面1",freeze = "0,1,1,2"，autoWidth=true)
public class ProductExcelSheetOneVO {
private Long id;
/**
* 订单号
*/
@ExcelColumn(name = "服单订单号", order = 1, hyperLinkTemplate = "https://xxx?code={}&test={}", hyperLinkPattern = {"orderCode","id"})
private String orderCode;
}
1.2 构造数据
List<Object> sheetOneVOS = Lists.newArrayList(); List<Object> sheetTwoVOS = Lists.newArrayList(); ExcelExportUtil.exportExcelStram(response.getOutputStream(), Lists.newArrayList(sheetData,sheetData2));
2. 注解
@Target({ElementType.TYPE, ElementType.FIELD}) @Retention(RetentionPolicy.RUNTIME) public @interface ExcelColumn { String name(); String hyperLinkTemplate() default ""; String[] hyperLinkPattern() default {}; int order() default 0; String datePattern() default "yyyy-MM-dd HH:mm:ss"; /** * 冻结表头 * 有则为启用 * 格式为 1,2 * 或 1,2,3,4 * @return */ String freeze() default ""; boolean autoWidth() default false; }
3. 执行方法
public class ExcelExportUtil { /** * excel 文件输出 * * @param outputStream * @param sheetList * @throws IOException */ public static void exportExcelStram(OutputStream outputStream, List<Sheet> sheetList) throws IOException { HSSFWorkbook workbook = new HSSFWorkbook(); sheetList.forEach(m -> initSheet(m.getContentList(), m.getClzz(), workbook)); workbook.write(outputStream); } /** * 组织单sheet * * @param content * @param clzz * @param workbook */ private static void initSheet(List<Object> content, Class clzz, HSSFWorkbook workbook) { /** * get excel header from annotation */ List<Head> header = Lists.newArrayList(); Field[] fields = clzz.getDeclaredFields(); /** * init header */ Map<String, Head> headMap = initHeader(header, fields); HSSFSheet sheet; ExcelColumn rowColumn = (ExcelColumn) clzz.getAnnotation(ExcelColumn.class); if (rowColumn != null) { sheet = workbook.createSheet(rowColumn.name()); } else { sheet = workbook.createSheet(); } Method[] methods = clzz.getDeclaredMethods(); Map<String, Method> methodMap = Maps.uniqueIndex(Lists.newArrayList(methods), input -> input.getName().toLowerCase()); /** * init header */ AtomicInteger rowIndex = new AtomicInteger(0); HSSFRow headerRow = sheet.createRow(rowIndex.getAndAdd(1)); AtomicInteger headerIndex = new AtomicInteger(0); header.forEach((k) -> { HSSFCell cell = headerRow.createCell(headerIndex.getAndAdd(1)); cell.setCellValue(k.getTitle()); }); /** * init content */ Collections.synchronizedList(content).parallelStream().forEach(m -> { Map<String, Object> contentMap = Maps.newHashMap(); for (int i = 0; i < fields.length; i++) { if (!headMap.keySet().contains(fields[i].getName())) { continue; } fields[i].setAccessible(true); Object val = null; try { // val = fields[i].get(m); //get val from get method System.out.println(fields[i].getName()); val = methodMap.get("get" + fields[i].getName().toLowerCase()).invoke(m); } catch (Exception e) { e.printStackTrace(); continue; } if (fields[i].getType() == Date.class) { contentMap.put(fields[i].getName(), HikDateUtils.getDateString((Date) val, headMap.get(fields[i].getName()).getDatePattern())); } else if (fields[i].getType() == BigDecimal.class) { contentMap.put(fields[i].getName(), String.valueOf(val)); } else { contentMap.put(fields[i].getName(), val == null ? "" : String.valueOf(val)); } } HSSFRow row = sheet.createRow(rowIndex.getAndAdd(1)); AtomicInteger cellIndex = new AtomicInteger(0); header.forEach((k) -> { HSSFCell cell = row.createCell(cellIndex.getAndAdd(1)); cell.setCellValue(contentMap.get(k.getCode()) + ""); if (!StringUtils.isEmpty(k.getHyperlinkTemplate())) { String hyLink = HikStringUtils.append(k.getHyperlinkTemplate(), Lists.newArrayList(k.getHyperlinkPattern()).stream().map(p -> contentMap.get(p) == null ? "" : contentMap.get(p).toString() ).toArray()); HSSFHyperlink link = new HSSFHyperlink(HSSFHyperlink.LINK_URL); link.setAddress(hyLink); cell.setHyperlink(link); } }); }); /** * auto width */ if (rowColumn.autoWidth()) { for (int i = 0; i < content.size(); i++) { sheet.autoSizeColumn(i, true); } } if (!StringUtils.isEmpty(rowColumn.freeze())) { String[] freezeArray = rowColumn.freeze().split(BaseConstants.SPLITER); if (freezeArray.length == 2) { sheet.createFreezePane(Integer.parseInt(freezeArray[0]), Integer.parseInt(freezeArray[1])); } if (freezeArray.length == 4) { sheet.createFreezePane(Integer.parseInt(freezeArray[0]), Integer.parseInt(freezeArray[1]), Integer.parseInt(freezeArray[2]), Integer.parseInt(freezeArray[3])); } } } private static Map<String, Head> initHeader(List<Head> header, Field[] fields) { for (int i = 0; i < fields.length; i++) { fields[i].setAccessible(true); ExcelColumn excelColumn = fields[i].getAnnotation(ExcelColumn.class); if (excelColumn == null) { continue; } header.add(new Head(fields[i].getName(), excelColumn.name(), excelColumn.order(), excelColumn.datePattern(), excelColumn.hyperLinkTemplate(), excelColumn.hyperLinkPattern())); } Collections.sort(header); return Maps.uniqueIndex(header, Head::getCode); } public static class Sheet { public Sheet(List<Object> contentList, Class clzz) { this.contentList = contentList; this.clzz = clzz; } private List<Object> contentList; private Class clzz; public List<Object> getContentList() { return contentList; } public void setContentList(List<Object> contentList) { this.contentList = contentList; } public Class getClzz() { return clzz; } public void setClzz(Class clzz) { this.clzz = clzz; } } public static class Head implements Comparable<Head> { /** * code */ private String code; /** * title */ private String title; /** * order */ private Integer order; /** * hyper link template */ private String hyperlinkTemplate; /** * hyper link pattern */ private String[] hyperlinkPattern; /** * date format */ private String datePattern; /** * @param title * @param template * @param patten */ public Head(String code, String title, Integer order, String datePattern, String template, String... patten) { this.code = code; this.title = title; this.order = order; this.datePattern = datePattern; this.hyperlinkTemplate = template; this.hyperlinkPattern = patten; } public Head(String code, String title, Integer order) { this.code = code; this.title = title; this.order = order; } public Integer getOrder() { return order; } public void setOrder(Integer order) { this.order = order; } public String getCode() { return code; } public void setCode(String code) { this.code = code; } public String getTitle() { return title; } public String getHyperlinkTemplate() { return hyperlinkTemplate; } public String[] getHyperlinkPattern() { return hyperlinkPattern; } public String getDatePattern() { return datePattern; } public void setDatePattern(String datePattern) { this.datePattern = datePattern; } @Override public int compareTo(Head o) { return this.getOrder().compareTo(o.getOrder()); } } }