package com.goafanti.common.utils.excel; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.FileInputStream; import java.io.FileOutputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.lang.reflect.Field; import java.math.BigDecimal; import java.net.URL; import java.net.URLConnection; import java.text.DecimalFormat; import java.util.ArrayList; import java.util.Arrays; import java.util.Comparator; import java.util.Date; import java.util.HashMap; import java.util.List; import java.util.Map; import java.util.Set; import java.util.UUID; import java.util.stream.Collectors; import javax.servlet.http.HttpServletResponse; import org.apache.poi.ss.usermodel.BorderStyle; import org.apache.poi.ss.usermodel.Cell; import org.apache.poi.ss.usermodel.CellStyle; import org.apache.poi.ss.usermodel.CellType; import org.apache.poi.ss.usermodel.ClientAnchor; import org.apache.poi.ss.usermodel.DataValidation; import org.apache.poi.ss.usermodel.DataValidationConstraint; import org.apache.poi.ss.usermodel.DataValidationHelper; import org.apache.poi.ss.usermodel.DateUtil; import org.apache.poi.ss.usermodel.Drawing; import org.apache.poi.ss.usermodel.FillPatternType; import org.apache.poi.ss.usermodel.Font; import org.apache.poi.ss.usermodel.HorizontalAlignment; import org.apache.poi.ss.usermodel.IndexedColors; import org.apache.poi.ss.usermodel.Row; import org.apache.poi.ss.usermodel.Sheet; import org.apache.poi.ss.usermodel.VerticalAlignment; import org.apache.poi.ss.usermodel.Workbook; import org.apache.poi.ss.util.CellRangeAddress; import org.apache.poi.ss.util.CellRangeAddressList; import org.apache.poi.util.IOUtils; import org.apache.poi.xssf.streaming.SXSSFWorkbook; import org.apache.poi.xssf.usermodel.XSSFClientAnchor; import org.apache.poi.xssf.usermodel.XSSFDataValidation; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import com.goafanti.common.bo.Result; import com.goafanti.common.constant.AFTConstants; import com.goafanti.common.error.BusinessException; import com.goafanti.common.utils.DateUtils; import com.goafanti.common.utils.StringUtils; import com.goafanti.common.utils.excel.Excel.ColumnType; /** * Excel相关处理 * * */ public class NewExcelUtil { private static final Logger log = LoggerFactory.getLogger(NewExcelUtil.class); /** * Excel sheet最大行数,默认65536 */ public static final int sheetSize = 65536; public String downloadPath = ""; /** * 工作表名称 */ private String sheetName; /** * 工作薄对象 */ private Workbook wb; /** * 工作表对象 */ private Sheet sheet; /** * 样式列表 */ private Map styles; /** * 导入导出数据列表 */ private List list; /** * 注解列表 */ private List fields; /** * 最大高度 */ private short maxHeight; /** * 统计列表 */ private Map statistics = new HashMap(); /** * 数字格式 */ private static final DecimalFormat DOUBLE_FORMAT = new DecimalFormat("######0.00"); /** * 实体对象 */ public Class clazz; public NewExcelUtil(Class clazz) { this.clazz = clazz; } public void init(List list, String sheetName) { if (list == null) { list = new ArrayList(); } this.list = list; this.sheetName = sheetName; createExcelField(); createWorkbook(); } /** * 对list数据源将其里面的数据导入到excel表单 * * @param list 导出数据集合 * @param sheetName 工作表的名称 * @return 结果 */ public Result exportExcel(List list, String sheetName) { this.init(list, sheetName); return exportExcel(); } /** * 直接导出CXCEL表 * @param list 导出数据集合 * @param sheetName 工作表的名称 * @param response */ public Result exportExcel(List list, String sheetName, HttpServletResponse response) { this.init(list, sheetName); exportExcel(response); return new Result().data(1); } /** * 导出CXCEL表到指定目录 * @param list 导出数据集合 * @param sheetName 工作表的名称 * @param response */ public Result exportExcel(List list, String sheetName, String uploadPath) { this.init(list, sheetName); this.downloadPath=uploadPath; return exportExcel(); } private void exportExcel(HttpServletResponse response) { try { OutputStream out = response.getOutputStream(); // 取出一共有多少个sheet. double sheetNo = Math.ceil(list.size() / sheetSize); String dateFilename =DateFilename(sheetName); for (int index = 0; index <= sheetNo; index++) { createSheet(sheetNo, index); // 产生一行 Row title = sheet.createRow(0); Cell cell = title.createCell(0); cell.setCellValue(sheetName); CellRangeAddress region = new CellRangeAddress(0, 0, 0, fields.size()-1); sheet.addMergedRegion(region); cell.setCellStyle(styles.get("total")); Row row = sheet.createRow(1); int column = 0; // 写入各个字段的列头名称 for (Object[] os : fields) { Excel excel = (Excel) os[1]; this.createCell(excel, row, column++); } fillExcelData(index, row); addStatisticsRow(); } response.addHeader("Content-Disposition", "attachment;filename=" + new String(dateFilename.getBytes(),"iso-8859-1")); response.setContentType("application/octet-stream;charset=utf-8"); wb.write(out); out.flush(); out.close(); } catch (Exception e) { log.error("导出Excel异常{}", e.getMessage()); throw new BusinessException("导出Excel失败,请联系网站管理员!"); } finally { if (wb != null) { try { wb.close(); } catch (IOException e1) { e1.printStackTrace(); } } } } private String DateFilename(String sheetName) { sheetName = sheetName + "_" + DateUtils.formatDate(new Date(), AFTConstants.YYYYMMDDHHMMSS)+".xlsx"; return sheetName; } /** * 对list数据源将其里面的数据导入到excel表单 * * @param sheetName 工作表的名称 * @return 结果 */ public Result importTemplateExcel(String sheetName) { this.init(null, sheetName); return exportExcel(); } /** * 对list数据源将其里面的数据导入到excel表单 * * @return 结果 */ public Result exportExcel() { OutputStream out = null; try { // 取出一共有多少个sheet. double sheetNo = Math.ceil(list.size() / sheetSize); for (int index = 0; index <= sheetNo; index++) { createSheet(sheetNo, index); // 产生一行 Row title = sheet.createRow(0); Cell cell = title.createCell(0); cell.setCellValue(sheetName); CellRangeAddress region = new CellRangeAddress(0, 0, 0, fields.size()-1); sheet.addMergedRegion(region); cell.setCellStyle(styles.get("total")); Row row = sheet.createRow(1); // 产生一行 int column = 0; // 写入各个字段的列头名称 for (Object[] os : fields) { Excel excel = (Excel) os[1]; this.createCell(excel, row, column++); } fillExcelData(index, row); addStatisticsRow(); } String filename = encodingFilename(sheetName); out = new FileOutputStream(getAbsoluteFile(filename)); wb.write(out); return new Result().data(filename); } catch (Exception e) { log.error("导出Excel异常{}", e.getMessage()); throw new BusinessException("导出Excel失败,请联系网站管理员!"); } finally { if (wb != null) { try { wb.close(); } catch (IOException e1) { e1.printStackTrace(); } } if (out != null) { try { out.close(); } catch (IOException e1) { e1.printStackTrace(); } } } } /** * 填充excel数据 * * @param index 序号 * @param row 单元格行 */ public void fillExcelData(int index, Row row) { int startNo = index * sheetSize; int endNo = Math.min(startNo + sheetSize, list.size()); for (int i = startNo; i < endNo; i++) { row = sheet.createRow(i + 2 - startNo); // 得到导出对象. T vo = (T) list.get(i); int column = 0; for (Object[] os : fields) { Field field = (Field) os[0]; Excel excel = (Excel) os[1]; // 设置实体类私有属性可访问 field.setAccessible(true); this.addCell(excel, row, vo, field, column++); } } } /** * 创建表格样式 * * @param wb 工作薄对象 * @return 样式列表 */ private Map createStyles(Workbook wb) { // 写入各条记录,每条记录对应excel表中的一行 Map styles = new HashMap(); // CellStyle style = wb.createCellStyle(); style.setAlignment(HorizontalAlignment.CENTER); style.setVerticalAlignment(VerticalAlignment.CENTER); style.setBorderRight(BorderStyle.THIN); style.setRightBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderLeft(BorderStyle.THIN); style.setLeftBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderTop(BorderStyle.THIN); style.setTopBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setBorderBottom(BorderStyle.THIN); style.setBottomBorderColor(IndexedColors.GREY_50_PERCENT.getIndex()); Font dataFont = wb.createFont(); dataFont.setFontName("Arial"); dataFont.setFontHeightInPoints((short) 10); style.setFont(dataFont); styles.put("data", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(HorizontalAlignment.CENTER); style.setVerticalAlignment(VerticalAlignment.CENTER); style.setFillForegroundColor(IndexedColors.GREY_25_PERCENT.getIndex()); style.setFillPattern(FillPatternType.SOLID_FOREGROUND); Font headerFont = wb.createFont(); headerFont.setFontName("Arial"); headerFont.setFontHeightInPoints((short) 10); headerFont.setBold(true); headerFont.setColor(IndexedColors.WHITE.getIndex()); style.setFont(headerFont); styles.put("header", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(HorizontalAlignment.CENTER); style.setVerticalAlignment(VerticalAlignment.CENTER); style.setFillForegroundColor(IndexedColors.GREY_50_PERCENT.getIndex()); style.setFillPattern(FillPatternType.SOLID_FOREGROUND); Font totalFont = wb.createFont(); totalFont.setFontName("Arial"); totalFont.setFontHeightInPoints((short) 10); totalFont.setColor(IndexedColors.WHITE.getIndex()); style.setFont(totalFont); styles.put("total", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(HorizontalAlignment.LEFT); styles.put("data1", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(HorizontalAlignment.CENTER); styles.put("data2", style); style = wb.createCellStyle(); style.cloneStyleFrom(styles.get("data")); style.setAlignment(HorizontalAlignment.RIGHT); styles.put("data3", style); return styles; } /** * 创建单元格 */ public Cell createCell(Excel attr, Row row, int column) { // 创建列 Cell cell = row.createCell(column); // 写入列信息 cell.setCellValue(attr.name()); setDataValidation(attr, row, column); cell.setCellStyle(styles.get("header")); return cell; } /** * 创建单元格 */ public Cell createTotal(String str, Row row, int column) { // 创建列 Cell cell = row.createCell(column); // 写入列信息 cell.setCellValue(str); sheet.setColumnWidth(column, (int) ((14 + 0.72) * 256)); cell.setCellStyle(styles.get("header")); return cell; } /** * 设置单元格信息 * * @param value 单元格值 * @param attr 注解相关 * @param cell 单元格信息 */ public void setCellVo(Object value, Excel attr, Cell cell) { if (ColumnType.STRING == attr.cellType()) { cell.setCellValue(StringUtils.isNull(value) ? attr.defaultValue() : value + attr.suffix()); } else if (ColumnType.NUMERIC == attr.cellType()) { cell.setCellValue(StringUtils.contains(toStr(value), ".") ? toDouble(value) : toInt(value)); } else if (ColumnType.IMAGE == attr.cellType()) { ClientAnchor anchor = new XSSFClientAnchor(0, 0, 0, 0, (short) cell.getColumnIndex(), cell.getRow().getRowNum(), (short) (cell.getColumnIndex() + 1), cell.getRow().getRowNum() + 1); String imagePath = toStr(value); if (StringUtils.isNotEmpty(imagePath)) { byte[] data = getImage(imagePath); getDrawingPatriarch(cell.getSheet()).createPicture(anchor, cell.getSheet().getWorkbook().addPicture(data, getImageType(data))); } } } /** * 获取画布 */ public static Drawing getDrawingPatriarch(Sheet sheet) { if (sheet.getDrawingPatriarch() == null) { sheet.createDrawingPatriarch(); } return sheet.getDrawingPatriarch(); } /** * 获取图片类型,设置图片插入类型 */ public int getImageType(byte[] value) { String type = getFileExtendName(value); if ("JPG".equalsIgnoreCase(type)) { return Workbook.PICTURE_TYPE_JPEG; } else if ("PNG".equalsIgnoreCase(type)) { return Workbook.PICTURE_TYPE_PNG; } return Workbook.PICTURE_TYPE_JPEG; } /** * 创建表格样式 */ public void setDataValidation(Excel attr, Row row, int column) { if (attr.name().indexOf("注:") >= 0) { sheet.setColumnWidth(column, 6000); } else { // 设置列宽 sheet.setColumnWidth(column, (int) ((attr.width() + 0.72) * 256)); } // 如果设置了提示信息则鼠标放上去提示. if (StringUtils.isNotEmpty(attr.prompt())) { // 这里默认设了2-101列提示. setXSSFPrompt(sheet, "", attr.prompt(), 1, 100, column, column); } // 如果设置了combo属性则本列只能选择不能输入 if (attr.combo().length > 0) { // 这里默认设了2-101列只能选择不能输入. setXSSFValidation(sheet, attr.combo(), 1, 100, column, column); } } /** * 添加单元格 */ @SuppressWarnings("deprecation") public Cell addCell(Excel attr, Row row, T vo, Field field, int column) { Cell cell = null; try { // 设置行高 row.setHeight(maxHeight); // 根据Excel中设置情况决定是否导出,有些情况需要保持为空,希望用户填写这一列. if (attr.isExport()) { // 创建cell cell = row.createCell(column); int align = attr.align().value(); cell.setCellStyle(styles.get("data" + (align >= 1 && align <= 3 ? align : ""))); // 用于读取对象中的属性 Object value = getTargetValue(vo, field, attr); String dateFormat = attr.dateFormat(); String readConverterExp = attr.readConverterExp(); String separator = attr.separator(); if (StringUtils.isNotEmpty(dateFormat) && StringUtils.isNotNull(value)) { cell.setCellValue(DateUtils.parseDateToStr(dateFormat, (Date) value)); } else if (StringUtils.isNotEmpty(readConverterExp) && StringUtils.isNotNull(value)) { cell.setCellValue(convertByExp(toStr(value), readConverterExp, separator)); } else if (value instanceof BigDecimal && -1 != attr.scale()) { cell.setCellValue((((BigDecimal) value).setScale(attr.scale(), attr.roundingMode())).stripTrailingZeros().toPlainString()); } else{ // 设置列类型 setCellVo(value, attr, cell); } addStatisticsData(column, toStr(value), attr); } } catch (Exception e) { log.error("导出Excel失败{}", e); } return cell; } /** * 设置 POI XSSFSheet 单元格提示 * * @param sheet 表单 * @param promptTitle 提示标题 * @param promptContent 提示内容 * @param firstRow 开始行 * @param endRow 结束行 * @param firstCol 开始列 * @param endCol 结束列 */ public void setXSSFPrompt(Sheet sheet, String promptTitle, String promptContent, int firstRow, int endRow, int firstCol, int endCol) { DataValidationHelper helper = sheet.getDataValidationHelper(); DataValidationConstraint constraint = helper.createCustomConstraint("DD1"); CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol); DataValidation dataValidation = helper.createValidation(constraint, regions); dataValidation.createPromptBox(promptTitle, promptContent); dataValidation.setShowPromptBox(true); sheet.addValidationData(dataValidation); } /** * 设置某些列的值只能输入预制的数据,显示下拉框. * * @param sheet 要设置的sheet. * @param textlist 下拉框显示的内容 * @param firstRow 开始行 * @param endRow 结束行 * @param firstCol 开始列 * @param endCol 结束列 * @return 设置好的sheet. */ public void setXSSFValidation(Sheet sheet, String[] textlist, int firstRow, int endRow, int firstCol, int endCol) { DataValidationHelper helper = sheet.getDataValidationHelper(); // 加载下拉列表内容 DataValidationConstraint constraint = helper.createExplicitListConstraint(textlist); // 设置数据有效性加载在哪个单元格上,四个参数分别是:起始行、终止行、起始列、终止列 CellRangeAddressList regions = new CellRangeAddressList(firstRow, endRow, firstCol, endCol); // 数据有效性对象 DataValidation dataValidation = helper.createValidation(constraint, regions); // 处理Excel兼容性问题 if (dataValidation instanceof XSSFDataValidation) { dataValidation.setSuppressDropDownArrow(true); dataValidation.setShowErrorBox(true); } else { dataValidation.setSuppressDropDownArrow(false); } sheet.addValidationData(dataValidation); } /** * 解析导出值 0=男,1=女,2=未知 * * @param propertyValue 参数值 * @param converterExp 翻译注解 * @param separator 分隔符 * @return 解析后值 */ public static String convertByExp(String propertyValue, String converterExp, String separator) { StringBuilder propertyString = new StringBuilder(); String[] convertSource = converterExp.split(","); for (String item : convertSource) { String[] itemArray = item.split("="); if (StringUtils.containsAny(separator, propertyValue)) { for (String value : propertyValue.split(separator)) { if (itemArray[0].equals(value)) { propertyString.append(itemArray[1] + separator); break; } } } else { if (itemArray[0].equals(propertyValue)) { return itemArray[1]; } } } return StringUtils.stripEnd(propertyString.toString(), separator); } /** * 反向解析值 男=0,女=1,未知=2 * * @param propertyValue 参数值 * @param converterExp 翻译注解 * @param separator 分隔符 * @return 解析后值 */ public static String reverseByExp(String propertyValue, String converterExp, String separator) { StringBuilder propertyString = new StringBuilder(); String[] convertSource = converterExp.split(","); for (String item : convertSource) { String[] itemArray = item.split("="); if (StringUtils.containsAny(separator, propertyValue)) { for (String value : propertyValue.split(separator)) { if (itemArray[1].equals(value)) { propertyString.append(itemArray[0] + separator); break; } } } else { if (itemArray[1].equals(propertyValue)) { return itemArray[0]; } } } return StringUtils.stripEnd(propertyString.toString(), separator); } /** * 合计统计信息 */ private void addStatisticsData(Integer index, String text, Excel entity) { if (entity != null && entity.isStatistics()) { Double temp = 0D; if (!statistics.containsKey(index)) { statistics.put(index, temp); } try { temp = Double.valueOf(text); } catch (NumberFormatException e) { } statistics.put(index, statistics.get(index) + temp); } } /** * 创建统计行 */ public void addStatisticsRow() { if (statistics.size() > 0) { Cell cell = null; Row row = sheet.createRow(sheet.getLastRowNum() + 1); Set keys = statistics.keySet(); cell = row.createCell(0); cell.setCellStyle(styles.get("total")); cell.setCellValue("合计"); for (Integer key : keys) { cell = row.createCell(key); cell.setCellStyle(styles.get("total")); cell.setCellValue(DOUBLE_FORMAT.format(statistics.get(key))); } statistics.clear(); } } /** * 编码文件名 */ public String encodingFilename(String filename) { filename = UUID.randomUUID().toString() + "_" + filename + ".xlsx"; return filename; } /** * 获取下载路径 * * @param filename 文件名称 */ public String getAbsoluteFile(String filename) { String downloadPath = this.downloadPath+"/" + filename; File desc = new File(downloadPath); if (!desc.getParentFile().exists()) { desc.getParentFile().mkdirs(); } log.debug(downloadPath); return downloadPath; } /** * 获取bean中的属性值 * * @param vo 实体对象 * @param field 字段 * @param excel 注解 * @return 最终的属性值 * @throws Exception */ private Object getTargetValue(T vo, Field field, Excel excel) throws Exception { Object o = field.get(vo); if (StringUtils.isNotEmpty(excel.targetAttr())) { String target = excel.targetAttr(); if (target.indexOf(".") > -1) { String[] targets = target.split("[.]"); for (String name : targets) { o = getValue(o, name); } } else { o = getValue(o, target); } } return o; } /** * 以类的属性的get方法方法形式获取值 * * @param o * @param name * @return value * @throws Exception */ private Object getValue(Object o, String name) throws Exception { if (StringUtils.isNotNull(o) && StringUtils.isNotEmpty(name)) { Class clazz = o.getClass(); Field field = clazz.getDeclaredField(name); field.setAccessible(true); o = field.get(o); } return o; } /** * 得到所有定义字段 */ private void createExcelField() { this.fields = new ArrayList(); List tempFields = new ArrayList<>(); tempFields.addAll(Arrays.asList(clazz.getSuperclass().getDeclaredFields())); tempFields.addAll(Arrays.asList(clazz.getDeclaredFields())); for (Field field : tempFields) { // 单注解 if (field.isAnnotationPresent(Excel.class)) { putToField(field, field.getAnnotation(Excel.class)); } // 多注解 if (field.isAnnotationPresent(Excels.class)) { Excels attrs = field.getAnnotation(Excels.class); Excel[] excels = attrs.value(); for (Excel excel : excels) { putToField(field, excel); } } } this.fields = this.fields.stream().sorted(Comparator.comparing(objects -> ((Excel) objects[1]).sort())) .collect(Collectors.toList()); this.maxHeight = getRowHeight(); } /** * 根据注解获取最大行高 */ public short getRowHeight() { double maxHeight = 0; for (Object[] os : this.fields) { Excel excel = (Excel) os[1]; maxHeight = maxHeight > excel.height() ? maxHeight : excel.height(); } return (short) (maxHeight * 20); } /** * 放到字段集合中 */ private void putToField(Field field, Excel attr) { if (attr != null) { this.fields.add(new Object[] { field, attr }); } } /** * 创建一个工作簿 */ public void createWorkbook() { this.wb = new SXSSFWorkbook(500); } /** * 创建工作表 * * @param sheetNo sheet数量 * @param index 序号 */ public void createSheet(double sheetNo, int index) { this.sheet = wb.createSheet(); this.styles = createStyles(wb); // 设置工作表的名称. if (sheetNo == 0) { wb.setSheetName(index, sheetName); } else { wb.setSheetName(index, sheetName + index); } } /** * 获取单元格值 * * @param row 获取的行 * @param column 获取单元格列号 * @return 单元格值 */ public Object getCellValue(Row row, int column) { if (row == null) { return row; } Object val = ""; try { Cell cell = row.getCell(column); if (StringUtils.isNotNull(cell)) { if (cell.getCellTypeEnum() == CellType.NUMERIC || cell.getCellTypeEnum() == CellType.FORMULA) { val = cell.getNumericCellValue(); if (DateUtil.isCellDateFormatted(cell)) { val = DateUtil.getJavaDate((Double) val); // POI Excel 日期格式转换 } else { if ((Double) val % 1 != 0) { val = new BigDecimal(val.toString()); } else { val = new DecimalFormat("0").format(val); } } } else if (cell.getCellTypeEnum() == CellType.STRING) { val = cell.getStringCellValue(); } else if (cell.getCellTypeEnum() == CellType.BOOLEAN) { val = cell.getBooleanCellValue(); } else if (cell.getCellTypeEnum() == CellType.ERROR) { val = cell.getErrorCellValue(); } } } catch (Exception e) { return val; } return val; } /** * 转换为字符串
* 如果给定的值为null,或者转换失败,返回默认值null
* 转换失败不会报错 * * @param value 被转换的值 * @return 结果 */ public static String toStr(Object value) { return toStr(value, null); } /** * 转换为字符串
* 如果给定的值为null,或者转换失败,返回默认值
* 转换失败不会报错 * * @param value 被转换的值 * @param defaultValue 转换错误时的默认值 * @return 结果 */ public static String toStr(Object value, String defaultValue) { if (null == value) { return defaultValue; } if (value instanceof String) { return (String) value; } return value.toString(); } /** * 转换为double
* 如果给定的值为空,或者转换失败,返回默认值null
* 转换失败不会报错 * * @param value 被转换的值 * @return 结果 */ public static Double toDouble(Object value) { return toDouble(value, null); } /** * 转换为double
* 如果给定的值为空,或者转换失败,返回默认值
* 转换失败不会报错 * * @param value 被转换的值 * @param defaultValue 转换错误时的默认值 * @return 结果 */ public static Double toDouble(Object value, Double defaultValue) { if (value == null) { return defaultValue; } if (value instanceof Double) { return (Double) value; } if (value instanceof Number) { return ((Number) value).doubleValue(); } final String valueStr = toStr(value, null); if (StringUtils.isEmpty(valueStr)) { return defaultValue; } try { // 支持科学计数法 return new BigDecimal(valueStr.trim()).doubleValue(); } catch (Exception e) { return defaultValue; } } /** * 转换为int
* 如果给定的值为null,或者转换失败,返回默认值null
* 转换失败不会报错 * * @param value 被转换的值 * @return 结果 */ public static Integer toInt(Object value) { return toInt(value, null); } /** * 转换为int
* 如果给定的值为空,或者转换失败,返回默认值
* 转换失败不会报错 * * @param value 被转换的值 * @param defaultValue 转换错误时的默认值 * @return 结果 */ public static Integer toInt(Object value, Integer defaultValue) { if (value == null) { return defaultValue; } if (value instanceof Integer) { return (Integer) value; } if (value instanceof Number) { return ((Number) value).intValue(); } final String valueStr = toStr(value, null); if (StringUtils.isEmpty(valueStr)) { return defaultValue; } try { return Integer.parseInt(valueStr.trim()); } catch (Exception e) { return defaultValue; } } /** * 获取文件类型 * * @param photoByte 文件字节码 * @return 后缀(不含".") */ public static String getFileExtendName(byte[] photoByte) { String strFileExtendName = "JPG"; if ((photoByte[0] == 71) && (photoByte[1] == 73) && (photoByte[2] == 70) && (photoByte[3] == 56) && ((photoByte[4] == 55) || (photoByte[4] == 57)) && (photoByte[5] == 97)) { strFileExtendName = "GIF"; } else if ((photoByte[6] == 74) && (photoByte[7] == 70) && (photoByte[8] == 73) && (photoByte[9] == 70)) { strFileExtendName = "JPG"; } else if ((photoByte[0] == 66) && (photoByte[1] == 77)) { strFileExtendName = "BMP"; } else if ((photoByte[1] == 80) && (photoByte[2] == 78) && (photoByte[3] == 71)) { strFileExtendName = "PNG"; } return strFileExtendName; } public static byte[] getImage(String imagePath) { InputStream is = getFile(imagePath); try { return IOUtils.toByteArray(is); } catch (Exception e) { log.error("图片加载异常 {}", e); return null; } finally { IOUtils.closeQuietly(is); } } public static InputStream getFile(String imagePath) { try { byte[] result = readFile(imagePath); result = Arrays.copyOf(result, result.length); return new ByteArrayInputStream(result); } catch (Exception e) { log.error("获取图片异常 {}", e); } return null; } /** * 读取文件为字节数据 * * @param key 地址 * @return 字节数据 */ public static byte[] readFile(String url) { InputStream in = null; ByteArrayOutputStream baos = null; try { if (url.startsWith("http")) { // 网络地址 URL urlObj = new URL(url); URLConnection urlConnection = urlObj.openConnection(); urlConnection.setConnectTimeout(30 * 1000); urlConnection.setReadTimeout(60 * 1000); urlConnection.setDoInput(true); in = urlConnection.getInputStream(); } else { // 本机地址(需修改) String localPath = "127.0.0.1"; String downloadPath = localPath + StringUtils.substringAfter(url, "/profile"); in = new FileInputStream(downloadPath); } return IOUtils.toByteArray(in); } catch (Exception e) { log.error("获取文件路径异常 {}", e); return null; } finally { IOUtils.closeQuietly(baos); } } }