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@@ -0,0 +1,344 @@
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+package com.galaxis.manatee.util;
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+
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+import java.io.File;
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+import java.io.FileOutputStream;
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+import java.io.IOException;
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+import java.io.InputStream;
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+import java.lang.reflect.Constructor;
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+import java.lang.reflect.Field;
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+import java.math.BigDecimal;
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+import java.net.URLEncoder;
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+import java.util.ArrayList;
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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.HashMap;
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+import java.util.List;
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+import java.util.Map;
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+import java.util.concurrent.atomic.AtomicInteger;
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+import java.util.stream.Collectors;
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+import java.util.stream.Stream;
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+
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+import javax.servlet.http.HttpServletResponse;
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+
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+import com.galaxis.manatee.entity.chuanyun.dto.ExcelColumn;
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+import org.apache.commons.collections.CollectionUtils;
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+
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+import org.apache.commons.lang.BooleanUtils;
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+import org.apache.commons.lang.CharUtils;
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+import org.apache.commons.lang.StringUtils;
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+import org.apache.commons.lang.math.NumberUtils;
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+import org.apache.poi.hssf.usermodel.HSSFDateUtil;
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+import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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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.Font;
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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.Workbook;
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+import org.apache.poi.xssf.usermodel.XSSFWorkbook;
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+import org.slf4j.Logger;
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+import org.slf4j.LoggerFactory;
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+import org.springframework.http.MediaType;
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+import org.springframework.web.multipart.MultipartFile;
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+
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+
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+
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+public class ExcelUtils {
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+
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+ private final static Logger log = LoggerFactory.getLogger(ExcelUtils.class);
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+
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+ private final static String EXCEL2003 = "xls";
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+ private final static String EXCEL2007 = "xlsx";
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+
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+ public static <T> List<T> readExcel(String path, Class<T> cls,MultipartFile file){
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+
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+ String fileName = file.getOriginalFilename();
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+ if (!fileName.matches("^.+\\.(?i)(xls)$") && !fileName.matches("^.+\\.(?i)(xlsx)$")) {
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+ log.error("上传文件格式不正确");
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+ }
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+ List<T> dataList = new ArrayList<>();
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+ Workbook workbook = null;
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+ try {
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+ InputStream is = file.getInputStream();
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+ if (fileName.endsWith(EXCEL2007)) {
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+// FileInputStream is = new FileInputStream(new File(path));
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+ workbook = new XSSFWorkbook(is);
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+ }
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+ if (fileName.endsWith(EXCEL2003)) {
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+// FileInputStream is = new FileInputStream(new File(path));
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+ workbook = new HSSFWorkbook(is);
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+ }
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+ if (workbook != null) {
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+ //类映射 注解 value-->bean columns
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+ Map<String, List<Field>> classMap = new HashMap<>();
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+ List<Field> fields = Stream.of(cls.getDeclaredFields()).collect(Collectors.toList());
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+ fields.forEach(
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+ field -> {
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+ ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
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+ if (annotation != null) {
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+ String value = annotation.value();
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+ if (StringUtils.isBlank(value)) {
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+ return;//return起到的作用和continue是相同的 语法
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+ }
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+ if (!classMap.containsKey(value)) {
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+ classMap.put(value, new ArrayList<>());
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+ }
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+ field.setAccessible(true);
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+ classMap.get(value).add(field);
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+ }
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+ }
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+ );
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+ //索引-->columns
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+ Map<Integer, List<Field>> reflectionMap = new HashMap<>(16);
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+ //默认读取第一个sheet
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+ Sheet sheet = workbook.getSheetAt(0);
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+
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+ boolean firstRow = true;
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+ for (int i = sheet.getFirstRowNum(); i <= sheet.getLastRowNum(); i++) {
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+ Row row = sheet.getRow(i);
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+ //首行 提取注解
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+ if (firstRow) {
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+ for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
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+ Cell cell = row.getCell(j);
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+ String cellValue = getCellValue(cell);
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+ if (classMap.containsKey(cellValue)) {
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+ reflectionMap.put(j, classMap.get(cellValue));
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+ }
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+ }
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+ firstRow = false;
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+ } else {
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+ //忽略空白行
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+ if (row == null) {
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+ continue;
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+ }
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+ try {
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+ T t = cls.newInstance();
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+ //判断是否为空白行
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+ boolean allBlank = true;
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+ for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
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+ if (reflectionMap.containsKey(j)) {
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+ Cell cell = row.getCell(j);
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+ String cellValue = getCellValue(cell);
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+ if (StringUtils.isNotBlank(cellValue)) {
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+ allBlank = false;
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+ }
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+ List<Field> fieldList = reflectionMap.get(j);
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+ fieldList.forEach(
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+ x -> {
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+ try {
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+ handleField(t, cellValue, x);
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+ } catch (Exception e) {
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+ log.error(String.format("reflect field:%s value:%s exception!", x.getName(), cellValue), e);
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+ }
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+ }
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+ );
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+ }
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+ }
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+ if (!allBlank) {
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+ dataList.add(t);
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+ } else {
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+ log.warn(String.format("row:%s is blank ignore!", i));
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+ }
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+ } catch (Exception e) {
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+ log.error(String.format("parse row:%s exception!", i), e);
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+ }
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+ }
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+ }
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+ }
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+ } catch (Exception e) {
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+ log.error(String.format("parse excel exception!"), e);
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+ } finally {
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+ if (workbook != null) {
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+ try {
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+ workbook.close();
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+ } catch (Exception e) {
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+ log.error(String.format("parse excel exception!"), e);
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+ }
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+ }
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+ }
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+ return dataList;
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+ }
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+
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+ private static <T> void handleField(T t, String value, Field field) throws Exception {
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+ Class<?> type = field.getType();
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+ if (type == null || type == void.class || StringUtils.isBlank(value)) {
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+ return;
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+ }
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+ if (type == Object.class) {
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+ field.set(t, value);
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+ //数字类型
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+ } else if (type.getSuperclass() == null || type.getSuperclass() == Number.class) {
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+ if (type == int.class || type == Integer.class) {
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+ field.set(t, NumberUtils.toInt(value));
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+ } else if (type == long.class || type == Long.class) {
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+ field.set(t, NumberUtils.toLong(value));
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+ } else if (type == byte.class || type == Byte.class) {
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+ field.set(t, NumberUtils.toByte(value));
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+ } else if (type == short.class || type == Short.class) {
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+ field.set(t, NumberUtils.toShort(value));
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+ } else if (type == double.class || type == Double.class) {
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+ field.set(t, NumberUtils.toDouble(value));
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+ } else if (type == float.class || type == Float.class) {
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+ field.set(t, NumberUtils.toFloat(value));
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+ } else if (type == char.class || type == Character.class) {
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+ field.set(t, CharUtils.toChar(value));
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+ } else if (type == boolean.class) {
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+ field.set(t, BooleanUtils.toBoolean(value));
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+ } else if (type == BigDecimal.class) {
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+ field.set(t, new BigDecimal(value));
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+ }
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+ } else if (type == Boolean.class) {
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+ field.set(t, BooleanUtils.toBoolean(value));
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+ } else if (type == Date.class) {
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+ //
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+ field.set(t, value);
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+ } else if (type == String.class) {
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+ field.set(t, value);
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+ } else {
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+ Constructor<?> constructor = type.getConstructor(String.class);
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+ field.set(t, constructor.newInstance(value));
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+ }
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+ }
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+
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+ private static String getCellValue(Cell cell) {
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+ if (cell == null) {
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+ return "";
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+ }
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+ if (cell.getCellType() == Cell.CELL_TYPE_NUMERIC) {
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+ if (HSSFDateUtil.isCellDateFormatted(cell)) {
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+ return HSSFDateUtil.getJavaDate(cell.getNumericCellValue()).toString();
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+ } else {
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+ return new BigDecimal(cell.getNumericCellValue()).toString();
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+ }
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+ } else if (cell.getCellType() == Cell.CELL_TYPE_STRING) {
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+ return StringUtils.trimToEmpty(cell.getStringCellValue());
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+ } else if (cell.getCellType() == Cell.CELL_TYPE_FORMULA) {
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+ return StringUtils.trimToEmpty(cell.getCellFormula());
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+ } else if (cell.getCellType() == Cell.CELL_TYPE_BLANK) {
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+ return "";
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+ } else if (cell.getCellType() == Cell.CELL_TYPE_BOOLEAN) {
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+ return String.valueOf(cell.getBooleanCellValue());
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+ } else if (cell.getCellType() == Cell.CELL_TYPE_ERROR) {
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+ return "ERROR";
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+ } else {
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+ return cell.toString().trim();
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+ }
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+
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+ }
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+
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+ public static <T> void writeExcel(HttpServletResponse response, List<T> dataList, Class<T> cls){
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+ Field[] fields = cls.getDeclaredFields();
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+ List<Field> fieldList = Arrays.stream(fields)
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+ .filter(field -> {
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+ ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
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+ if (annotation != null && annotation.col() > 0) {
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+ field.setAccessible(true);
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+ return true;
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+ }
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+ return false;
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+ }).sorted(Comparator.comparing(field -> {
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+ int col = 0;
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+ ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
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+ if (annotation != null) {
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+ col = annotation.col();
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+ }
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+ return col;
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+ })).collect(Collectors.toList());
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+
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+ Workbook wb = new XSSFWorkbook();
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+ Sheet sheet = wb.createSheet("Sheet1");
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+ AtomicInteger ai = new AtomicInteger();
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+ {
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+ Row row = sheet.createRow(ai.getAndIncrement());
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+ AtomicInteger aj = new AtomicInteger();
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+ //写入头部
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+ fieldList.forEach(field -> {
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+ ExcelColumn annotation = field.getAnnotation(ExcelColumn.class);
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+ String columnName = "";
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+ if (annotation != null) {
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+ columnName = annotation.value();
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+ }
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+ Cell cell = row.createCell(aj.getAndIncrement());
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+
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+ CellStyle cellStyle = wb.createCellStyle();
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+ cellStyle.setFillForegroundColor(IndexedColors.WHITE.getIndex());
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+ cellStyle.setFillPattern(CellStyle.SOLID_FOREGROUND);
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+ cellStyle.setAlignment(CellStyle.ALIGN_CENTER);
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+
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+ Font font = wb.createFont();
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+ font.setBoldweight(Font.BOLDWEIGHT_NORMAL);
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+ cellStyle.setFont(font);
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+ cell.setCellStyle(cellStyle);
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+ cell.setCellValue(columnName);
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+ });
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+ }
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+ if (CollectionUtils.isNotEmpty(dataList)) {
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+ dataList.forEach(t -> {
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+ Row row1 = sheet.createRow(ai.getAndIncrement());
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+ AtomicInteger aj = new AtomicInteger();
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+ fieldList.forEach(field -> {
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+ Class<?> type = field.getType();
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+ Object value = "";
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+ try {
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+ value = field.get(t);
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ Cell cell = row1.createCell(aj.getAndIncrement());
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+ if (value != null) {
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+ if (type == Date.class) {
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+ cell.setCellValue(value.toString());
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+ } else {
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+ cell.setCellValue(value.toString());
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+ }
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+ cell.setCellValue(value.toString());
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+ }
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+ });
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+ });
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+ }
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+ //冻结窗格
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+ wb.getSheet("Sheet1").createFreezePane(0, 1, 0, 1);
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+ //浏览器下载excel
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+ buildExcelDocument("abbot.xlsx",wb,response);
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+ //生成excel文件
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+// buildExcelFile(".\\default.xlsx",wb);
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+ }
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+
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+ /**
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+ * 浏览器下载excel
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+ * @param fileName
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+ * @param wb
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+ * @param response
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+ */
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+
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+ private static void buildExcelDocument(String fileName, Workbook wb,HttpServletResponse response){
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+ try {
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+ response.setContentType(MediaType.APPLICATION_OCTET_STREAM_VALUE);
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+ response.setHeader("Content-Disposition", "attachment;filename="+URLEncoder.encode(fileName, "utf-8"));
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+ response.flushBuffer();
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+ wb.write(response.getOutputStream());
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+ } catch (IOException e) {
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+ e.printStackTrace();
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+ }
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+ }
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+
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+ /**
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+ * 生成excel文件
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+ * @param path 生成excel路径
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+ * @param wb
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+ */
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+ private static void buildExcelFile(String path, Workbook wb){
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+
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+ File file = new File(path);
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+ if (file.exists()) {
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+ file.delete();
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+ }
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+ try {
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+ wb.write(new FileOutputStream(file));
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+ } catch (Exception e) {
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+ e.printStackTrace();
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+ }
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+ }
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+}
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xuj