excel导入导出(一)

 excel导入导出  

依赖

<dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi-ooxml</artifactId>
            <version>3.17</version>
        </dependency>
        <dependency>
            <groupId>commons-collections</groupId>
            <artifactId>commons-collections</artifactId>
            <version>3.2.1</version>
        </dependency>
        <dependency>
            <groupId>commons-beanutils</groupId>
            <artifactId>commons-beanutils</artifactId>
            <version>1.8.3</version>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>slf4j-api</artifactId>
            <version>1.7.5</version>
        </dependency>

单元表格

package com.dt.FileIStream;

import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;

@Retention(RetentionPolicy.RUNTIME)
@Target(ElementType.FIELD)
public @interface ExcelCell {
    /**
     * 顺序 default 100
     *
     */
    int index();

    /**
     * 当值为null时要显示的值 default StringUtils.EMPTY
     *
     */
    String defaultValue() default "";

    /**
     * 用于验证
     *
     */
    Valid valid() default @Valid();

    @Retention(RetentionPolicy.RUNTIME)
    @Target(ElementType.FIELD)
    @interface Valid {

        String[] in() default {};


        boolean allowNull() default true;


        double gt() default Double.NaN;


        double lt() default Double.NaN;


        double ge() default Double.NaN;


        double le() default Double.NaN;
    }
}

excel log 日志

package com.dt.FileIStream;

public class ExcelLog {
    private Integer rowNum;
    private Object object;
    private String log;

    public Integer getRowNum() {
        return rowNum;
    }
    public void setRowNum(Integer rowNum) {
        this.rowNum = rowNum;
    }
    public Object getObject() {
        return object;
    }
    public void setObject(Object object) {
        this.object = object;
    }
    public String getLog() {
        return log;
    }
    public ExcelLog(Object object, String log) {
        super();
        this.object = object;
        this.log = log;
    }
    public ExcelLog(Object object, String log, Integer rowNum) {
        super();
        this.rowNum = rowNum;
        this.object = object;
        this.log = log;
    }
    public void setLog(String log) {
        this.log = log;
    }

}

package com.dt.FileIStream;

import com.cargosmart.dt.simoptz.util.ExcelUtil;

import java.util.ArrayList;
import java.util.List;

public class ExcelLogs {
    private Boolean hasError;
    private List<ExcelLog> logList;

    public ExcelLogs() {
        super();
        hasError = false;
    }
    public Boolean getHasError() {
        return hasError;
    }
    public void setHasError(Boolean hasError) {
        this.hasError = hasError;
    }
    public List<ExcelLog> getLogList() {
        return logList;
    }
    public List<ExcelLog> getErrorLogList() {
        List<ExcelLog> errList = new ArrayList<>();
        for (ExcelLog log : this.logList) {
            if (log != null && ExcelUtil.isNotBlank(log.getLog())) {
                errList.add(log);
            }
        }
        return errList;
    }
    public void setLogList(List<ExcelLog> logList) {
        this.logList = logList;
    }

}

excel 表头

package com.dt.FileIStream;

import java.util.Collection;
import java.util.Map;

public class ExcelSheet<T> {
    private String sheetName;
    private Map<String,String> headers;
    private Collection<T> dataset;

    /**
     * @return the sheetName
     */
    public String getSheetName() {
        return sheetName;
    }

    /**
     * Excel页签名称
     *
     * @param sheetName
     *            the sheetName to set
     */
    public void setSheetName(String sheetName) {
        this.sheetName = sheetName;
    }

    /**
     * Excel表头
     *
     */
    public Map<String,String> getHeaders() {
        return headers;
    }

    /**
     * @param headers
     *            the headers to set
     */
    public void setHeaders(Map<String,String> headers) {
        this.headers = headers;
    }

    /**
     * Excel数据集合
     *
     * @return the dataset
     */
    public Collection<T> getDataset() {
        return dataset;
    }

    /**
     * @param dataset
     *            the dataset to set
     */
    public void setDataset(Collection<T> dataset) {
        this.dataset = dataset;
    }

}

 添加  FieldForSortting类

package com.dt.FileIStream;

import java.lang.reflect.Field;

public class FieldForSortting {
    private Field field;
    private int index;


    public FieldForSortting(Field field) {
        super();
        this.field = field;
    }


    public FieldForSortting(Field field, int index) {
        super();
        this.field = field;
        this.index = index;
    }


    public Field getField() {
        return field;
    }


    public void setField(Field field) {
        this.field = field;
    }


    public int getIndex() {
        return index;
    }


    public void setIndex(int index) {
        this.index = index;
    }

}

添加列  Model

public class Model {
    @ExcelCell(index = 0)
    private String a;
    @ExcelCell(index = 1)
    private String b;
    @ExcelCell(index = 2)
    private String c;
    @ExcelCell(index = 3)
    private Date d;

    public Date getD() {
        return d;
    }

    public void setD(Date d) {
        this.d = d;
    }

    public Model(String a, String b, String c,Date d) {
        this.a = a;
        this.b = b;
        this.c = c;
        this.d = d;
    }

    /**
     * @return the a
     */
    public String getA() {
        return a;
    }

    /**
     * @param a
     *            the a to set
     */
    public void setA(String a) {
        this.a = a;
    }

    /**
     * @return the b
     */
    public String getB() {
        return b;
    }

    /**
     * @param b
     *            the b to set
     */
    public void setB(String b) {
        this.b = b;
    }

    /**
     * @return the c
     */
    public String getC() {
        return c;
    }

    /**
     * @param c
     *            the c to set
     */
    public void setC(String c) {
        this.c = c;
    }
}

excel 工具类

package com.dt.util;

import com.cargosmart.dt.simoptz.dscoe.FileIStream.*;
import org.apache.commons.beanutils.BeanComparator;
import org.apache.commons.collections.CollectionUtils;
import org.apache.commons.collections.ComparatorUtils;
import org.apache.commons.collections.comparators.ComparableComparator;
import org.apache.commons.collections.comparators.ComparatorChain;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellReference;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.text.MessageFormat;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;


public class ExcelUtil {

    private static Logger logger = LoggerFactory.getLogger(ExcelUtil.class);

    /**
     * 用来验证excel与Vo中的类型是否一致 <br>
     * Map<栏位类型,只能是哪些Cell类型>
     */
    private static Map<Class<?>, CellType[]> validateMap = new HashMap<>();

    static {
        validateMap.put(String[].class, new CellType[]{CellType.STRING});
        validateMap.put(Double[].class, new CellType[]{CellType.NUMERIC});
        validateMap.put(String.class, new CellType[]{CellType.STRING});
        validateMap.put(Double.class, new CellType[]{CellType.NUMERIC});
        validateMap.put(Date.class, new CellType[]{CellType.NUMERIC, CellType.STRING});
        validateMap.put(Integer.class, new CellType[]{CellType.NUMERIC});
        validateMap.put(Float.class, new CellType[]{CellType.NUMERIC});
        validateMap.put(Long.class, new CellType[]{CellType.NUMERIC});
        validateMap.put(Boolean.class, new CellType[]{CellType.BOOLEAN});
    }

    /**
     * 获取cell类型的文字描述
     *
     * @param cellType <pre>
     *                 CellType.BLANK
     *                 CellType.BOOLEAN
     *                 CellType.ERROR
     *                 CellType.FORMULA
     *                 CellType.NUMERIC
     *                 CellType.STRING
     *                 </pre>
     * @return
     */
    private static String getCellTypeByInt(CellType cellType) {
        if(cellType == CellType.BLANK)
            return "Null type";
        else if(cellType == CellType.BOOLEAN)
            return "Boolean type";
        else if(cellType == CellType.ERROR)
            return "Error type";
        else if(cellType == CellType.FORMULA)
            return "Formula type";
        else if(cellType == CellType.NUMERIC)
            return "Numeric type";
        else if(cellType == CellType.STRING)
            return "String type";
        else
            return "Unknown type";
    }

    /**
     * 获取单元格值
     *
     * @param cell
     * @return
     */
    private static Object getCellValue(Cell cell) {
        if (cell == null
                || (cell.getCellTypeEnum() == CellType.STRING && isBlank(cell
                .getStringCellValue()))) {
            return null;
        }
        CellType cellType = cell.getCellTypeEnum();
        if(cellType == CellType.BLANK)
            return null;
        else if(cellType == CellType.BOOLEAN)
            return cell.getBooleanCellValue();
        else if(cellType == CellType.ERROR)
            return cell.getErrorCellValue();
        else if(cellType == CellType.FORMULA) {
            try {
                if (HSSFDateUtil.isCellDateFormatted(cell)) {
                    return cell.getDateCellValue();
                } else {
                    return cell.getNumericCellValue();
                }
            } catch (IllegalStateException e) {
                return cell.getRichStringCellValue();
            }
        }
        else if(cellType == CellType.NUMERIC){
            if ((cell).getBooleanCellValue()) {
                return cell.getDateCellValue();
            } else {
                return cell.getNumericCellValue();
            }
        }
        else if(cellType == CellType.STRING)
            return cell.getStringCellValue();
        else
            return null;
    }


    public static <T> void exportExcel(Map<String,String> headers, Collection<T> dataset, OutputStream out) {
        exportExcel(headers, dataset, out, null);
    }


    public static <T> void exportExcel(Map<String,String> headers, Collection<T> dataset, OutputStream out,
                                       String pattern) {
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一个表格
        HSSFSheet sheet = workbook.createSheet();

        write2Sheet(sheet, headers, dataset, pattern);
        try {
            workbook.write(out);
        } catch (IOException e) {
            logger.error(e.toString(), e);
        }
    }

    public static void exportExcel(String[][] datalist, OutputStream out,boolean autoColumnWidth) {
        try {
            // 声明一个工作薄
            HSSFWorkbook workbook = new HSSFWorkbook();
            // 生成一个表格
            HSSFSheet sheet = workbook.createSheet();

            for (int i = 0; i < datalist.length; i++) {
                String[] r = datalist[i];
                HSSFRow row = sheet.createRow(i);
                for (int j = 0; j < r.length; j++) {
                    HSSFCell cell = row.createCell(j);
                    //cell max length 32767
                    if (r[j] != null && r[j].length() > 32767) {
                        r[j] = "--此字段过长(超过32767),已被截断--" + r[j];
                        r[j] = r[j].substring(0, 32766);
                    }
                    cell.setCellValue(r[j]);
                }
            }
            //自动列宽
            if(autoColumnWidth) {
                if (datalist.length > 0) {
                    int colcount = datalist[0].length;
                    for (int i = 0; i < colcount; i++) {
                        sheet.autoSizeColumn(i);
                    }
                }
            }
            workbook.write(out);
        } catch (IOException e) {
            logger.error(e.toString(), e);
        }
    }
    public static void exportExcel(String[][] datalist, OutputStream out) {
        exportExcel(datalist,out,true);
    }


    public static <T> void exportExcel(List<ExcelSheet<T>> sheets, OutputStream out) {
        exportExcel(sheets, out, null);
    }


    public static <T> void exportExcel(List<ExcelSheet<T>> sheets, OutputStream out, String pattern) {
        if (CollectionUtils.isEmpty(sheets)) {
            return;
        }
        // 声明一个工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        for (ExcelSheet<T> sheet : sheets) {
            // 生成一个表格
            HSSFSheet hssfSheet = workbook.createSheet(sheet.getSheetName());
            write2Sheet(hssfSheet, sheet.getHeaders(), sheet.getDataset(), pattern);
        }
        try {
            workbook.write(out);
        } catch (IOException e) {
            logger.error(e.toString(), e);
        }
    }

    /**
     * 每个sheet的写入
     *
     * @param sheet   页签
     * @param headers 表头
     * @param dataset 数据集合
     * @param pattern 日期格式
     */
    private static <T> void write2Sheet(HSSFSheet sheet, Map<String,String> headers, Collection<T> dataset,
                                        String pattern) {
        //时间格式默认"yyyy-MM-dd"
        if (isBlank(pattern)){
            pattern = "yyyy-MM-dd";
        }
        // 产生表格标题行
        HSSFRow row = sheet.createRow(0);
        // 标题行转中文
        Set<String> keys = headers.keySet();
        Iterator<String> it1 = keys.iterator();
        String key = "";    //存放临时键变量
        int c= 0;   //标题列数
        while (it1.hasNext()){
            key = it1.next();
            if (headers.containsKey(key)) {
                HSSFCell cell = row.createCell(c);
                HSSFRichTextString text = new HSSFRichTextString(headers.get(key));
                cell.setCellValue(text);
                c++;
            }
        }

        // 遍历集合数据，产生数据行
        Iterator<T> it = dataset.iterator();
        int index = 0;
        while (it.hasNext()) {
            index++;
            row = sheet.createRow(index);
            T t = it.next();
            try {
                if (t instanceof Map) {
                    //允许您选择性地取消特定代码段（即，类或方法）中的警告
                    @SuppressWarnings("unchecked")
                    Map<String, Object> map = (Map<String, Object>) t;
                    int cellNum = 0;
                    //遍历列名
                    Iterator<String> it2 = keys.iterator();
                    while (it2.hasNext()){
                        key = it2.next();
                        if (!headers.containsKey(key)) {
                            logger.error("Map 中 不存在 key [" + key + "]");
                            continue;
                        }
                        Object value = map.get(key);
                        HSSFCell cell = row.createCell(cellNum);

                        cellNum = setCellValue(cell,value,pattern,cellNum,null,row);

                        cellNum++;
                    }
                } else {
                    List<FieldForSortting> fields = sortFieldByAnno(t.getClass());
                    int cellNum = 0;
                    for (int i = 0; i < fields.size(); i++) {
                        HSSFCell cell = row.createCell(cellNum);
                        Field field = fields.get(i).getField();
                        field.setAccessible(true);
                        Object value = field.get(t);

                        cellNum = setCellValue(cell,value,pattern,cellNum,field,row);

                        cellNum++;
                    }
                }
            } catch (Exception e) {
                logger.error(e.toString(), e);
            }
        }
        // 设定自动宽度
        for (int i = 0; i < headers.size(); i++) {
            sheet.autoSizeColumn(i);
        }
    }

    private static int setCellValue(HSSFCell cell,Object value,String pattern,int cellNum,Field field,HSSFRow row){
        String textValue = null;
        if (value instanceof Integer) {
            int intValue = (Integer) value;
            cell.setCellValue(intValue);
        } else if (value instanceof Float) {
            float fValue = (Float) value;
            cell.setCellValue(fValue);
        } else if (value instanceof Double) {
            double dValue = (Double) value;
            cell.setCellValue(dValue);
        } else if (value instanceof Long) {
            long longValue = (Long) value;
            cell.setCellValue(longValue);
        } else if (value instanceof Boolean) {
            boolean bValue = (Boolean) value;
            cell.setCellValue(bValue);
        } else if (value instanceof Date) {
            Date date = (Date) value;
            SimpleDateFormat sdf = new SimpleDateFormat(pattern);
            textValue = sdf.format(date);
        } else if (value instanceof String[]) {
            String[] strArr = (String[]) value;
            for (int j = 0; j < strArr.length; j++) {
                String str = strArr[j];
                cell.setCellValue(str);
                if (j != strArr.length - 1) {
                    cellNum++;
                    cell = row.createCell(cellNum);
                }
            }
        } else if (value instanceof Double[]) {
            Double[] douArr = (Double[]) value;
            for (int j = 0; j < douArr.length; j++) {
                Double val = douArr[j];
                // 值不为空则set Value
                if (val != null) {
                    cell.setCellValue(val);
                }

                if (j != douArr.length - 1) {
                    cellNum++;
                    cell = row.createCell(cellNum);
                }
            }
        } else {
            // 其它数据类型都当作字符串简单处理
            String empty = "";
            if(field != null) {
                ExcelCell anno = field.getAnnotation(ExcelCell.class);
                if (anno != null) {
                    empty = anno.defaultValue();
                }
            }
            textValue = value == null ? empty : value.toString();
        }
        if (textValue != null) {
            HSSFRichTextString richString = new HSSFRichTextString(textValue);
            cell.setCellValue(richString);
        }
        return cellNum;
    }

    /**
     * 把Excel的数据封装成voList
     *
     * @param clazz       vo的Class
     * @param inputStream excel输入流
     * @param pattern     如果有时间数据，设定输入格式。默认为"yyy-MM-dd"
     * @param logs        错误log集合
     * @param arrayCount  如果vo中有数组类型,那就按照index顺序,把数组应该有几个值写上.
     * @return voList
     * @throws RuntimeException
     */
    public static <T> Collection<T> importExcel(Class<T> clazz, InputStream inputStream,
                                                String pattern, ExcelLogs logs, Integer... arrayCount) {
        Workbook workBook;
        try {
            workBook = WorkbookFactory.create(inputStream);
        } catch (Exception e) {
            logger.error("load excel file error",e);
            return null;
        }
        List<T> list = new ArrayList<>();
        Sheet sheet = workBook.getSheetAt(0);
        Iterator<Row> rowIterator = sheet.rowIterator();
        try {
            List<ExcelLog> logList = new ArrayList<>();
            // Map<title,index>
            Map<String, Integer> titleMap = new HashMap<>();

            while (rowIterator.hasNext()) {
                Row row = rowIterator.next();
                if (row.getRowNum() == 0) {
                    if (clazz == Map.class) {
                        // 解析map用的key,就是excel标题行
                        Iterator<Cell> cellIterator = row.cellIterator();
                        Integer index = 0;
                        while (cellIterator.hasNext()) {
                            String value = cellIterator.next().getStringCellValue();
                            titleMap.put(value, index);
                            index++;
                        }
                    }
                    continue;
                }
                // 整行都空，就跳过
                boolean allRowIsNull = true;
                Iterator<Cell> cellIterator = row.cellIterator();
                while (cellIterator.hasNext()) {
                    Object cellValue = getCellValue(cellIterator.next());
                    if (cellValue != null) {
                        allRowIsNull = false;
                        break;
                    }
                }
                if (allRowIsNull) {
                    logger.warn("Excel row " + row.getRowNum() + " all row value is null!");
                    continue;
                }
                StringBuilder log = new StringBuilder();
                if (clazz == Map.class) {
                    Map<String, Object> map = new HashMap<>();
                    for (String k : titleMap.keySet()) {
                        Integer index = titleMap.get(k);
                        Cell cell = row.getCell(index);
                        // 判空
                        if (cell == null) {
                            map.put(k, null);
                        } else {
                            cell.setCellType(CellType.STRING);
                            String value = cell.getStringCellValue();
                            map.put(k, value);
                        }
                    }
                    list.add((T) map);

                } else {
                    T t = clazz.newInstance();
                    int arrayIndex = 0;// 标识当前第几个数组了
                    int cellIndex = 0;// 标识当前读到这一行的第几个cell了
                    List<FieldForSortting> fields = sortFieldByAnno(clazz);
                    for (FieldForSortting ffs : fields) {
                        Field field = ffs.getField();
                        field.setAccessible(true);
                        if (field.getType().isArray()) {
                            Integer count = arrayCount[arrayIndex];
                            Object[] value;
                            if (field.getType().equals(String[].class)) {
                                value = new String[count];
                            } else {
                                // 目前只支持String[]和Double[]
                                value = new Double[count];
                            }
                            for (int i = 0; i < count; i++) {
                                Cell cell = row.getCell(cellIndex);
                                String errMsg = validateCell(cell, field, cellIndex);
                                if (isBlank(errMsg)) {
                                    value[i] = getCellValue(cell);
                                } else {
                                    log.append(errMsg);
                                    log.append(";");
                                    logs.setHasError(true);
                                }
                                cellIndex++;
                            }
                            field.set(t, value);
                            arrayIndex++;
                        } else {
                            Cell cell = row.getCell(cellIndex);
                            String errMsg = validateCell(cell, field, cellIndex);
                            if (isBlank(errMsg)) {
                                Object value = null;
                                // 处理特殊情况,Excel中的String,转换成Bean的Date
                                if (field.getType().equals(Date.class)
                                        && cell.getCellTypeEnum() == CellType.STRING) {
                                    Object strDate = getCellValue(cell);
                                    try {
                                        value = new SimpleDateFormat(pattern).parse(strDate.toString());
                                    } catch (ParseException e) {

                                        errMsg =
                                                MessageFormat.format("the cell [{0}] can not be converted to a date ",
                                                        CellReference.convertNumToColString(cell.getColumnIndex()));
                                    }
                                } else {
                                    value = getCellValue(cell);
                                    // 处理特殊情况,excel的value为String,且bean中为其他,且defaultValue不为空,那就=defaultValue
                                    ExcelCell annoCell = field.getAnnotation(ExcelCell.class);
                                    if (value instanceof String && !field.getType().equals(String.class)
                                            && isNotBlank(annoCell.defaultValue())) {
                                        value = annoCell.defaultValue();
                                    }
                                }
                                field.set(t, value);
                            }
                            if (isNotBlank(errMsg)) {
                                log.append(errMsg);
                                log.append(";");
                                logs.setHasError(true);
                            }
                            cellIndex++;
                        }
                    }
                    list.add(t);
                    logList.add(new ExcelLog(t, log.toString(), row.getRowNum() + 1));
                }
            }
            logs.setLogList(logList);
        } catch (InstantiationException e) {
            throw new RuntimeException(MessageFormat.format("can not instance class:{0}",
                    clazz.getSimpleName()), e);
        } catch (IllegalAccessException e) {
            throw new RuntimeException(MessageFormat.format("can not instance class:{0}",
                    clazz.getSimpleName()), e);
        }
        return list;
    }

    /**
     * 驗證Cell類型是否正確
     *
     * @param cell    cell單元格
     * @param field   欄位
     * @param cellNum 第幾個欄位,用於errMsg
     * @return
     */
    private static String validateCell(Cell cell, Field field, int cellNum) {
        //通过CellReference获得当前cell单元格所在列
        String columnName = CellReference.convertNumToColString(cellNum);
        String result = null;
        CellType[] cellTypeArr = validateMap.get(field.getType());
        if (cellTypeArr == null) {
            result = MessageFormat.format("Unsupported type [{0}]", field.getType().getSimpleName());
            return result;
        }
        ExcelCell annoCell = field.getAnnotation(ExcelCell.class);
        if (cell == null
                || (cell.getCellTypeEnum() == CellType.STRING && isBlank(cell
                .getStringCellValue()))) {
            if (annoCell != null && annoCell.valid().allowNull() == false) {
                result = MessageFormat.format("the cell [{0}] can not null", columnName);
            }
            ;
        } else if (cell.getCellTypeEnum() == CellType.BLANK && annoCell.valid().allowNull()) {
            return result;
        } else {
            List<CellType> cellTypes = Arrays.asList(cellTypeArr);

            // 如果類型不在指定範圍內,並且沒有默認值
            if (!(cellTypes.contains(cell.getCellTypeEnum()))
                    || isNotBlank(annoCell.defaultValue())
                    && cell.getCellTypeEnum() == CellType.STRING) {
                StringBuilder strType = new StringBuilder();
                for (int i = 0; i < cellTypes.size(); i++) {
                    CellType cellType = cellTypes.get(i);
                    strType.append(getCellTypeByInt(cellType));
                    if (i != cellTypes.size() - 1) {
                        strType.append(",");
                    }
                }
                result =
                        MessageFormat.format("the cell [{0}] type must [{1}]", columnName, strType.toString());
            } else {
                // 类型符合验证,但值不在要求范围内的
                // String in
                if (annoCell.valid().in().length != 0 && cell.getCellTypeEnum() == CellType.STRING) {
                    String[] in = annoCell.valid().in();
                    String cellValue = cell.getStringCellValue();
                    boolean isIn = false;
                    for (String str : in) {
                        if (str.equals(cellValue)) {
                            isIn = true;
                        }
                    }
                    if (!isIn) {
                        result = MessageFormat.format("the cell [{0}] value must in {1}", columnName, in);
                    }
                }
                // 数字型
                if (cell.getCellTypeEnum() == CellType.NUMERIC) {
                    double cellValue = cell.getNumericCellValue();
                    // 小于
                    if (!Double.isNaN(annoCell.valid().lt())) {
                        if (!(cellValue < annoCell.valid().lt())) {
                            result =
                                    MessageFormat.format("the cell [{0}] value must less than [{1}]", columnName,
                                            annoCell.valid().lt());
                        }
                    }
                    // 大于
                    if (!Double.isNaN(annoCell.valid().gt())) {
                        if (!(cellValue > annoCell.valid().gt())) {
                            result =
                                    MessageFormat.format("the cell [{0}] value must greater than [{1}]", columnName,
                                            annoCell.valid().gt());
                        }
                    }
                    // 小于等于
                    if (!Double.isNaN(annoCell.valid().le())) {
                        if (!(cellValue <= annoCell.valid().le())) {
                            result =
                                    MessageFormat.format("the cell [{0}] value must less than or equal [{1}]",
                                            columnName, annoCell.valid().le());
                        }
                    }
                    // 大于等于
                    if (!Double.isNaN(annoCell.valid().ge())) {
                        if (!(cellValue >= annoCell.valid().ge())) {
                            result =
                                    MessageFormat.format("the cell [{0}] value must greater than or equal [{1}]",
                                            columnName, annoCell.valid().ge());
                        }
                    }
                }
            }
        }
        return result;
    }

    /**
     * 根据annotation的seq排序后的栏位
     *
     * @param clazz
     * @return
     */
    private static List<FieldForSortting> sortFieldByAnno(Class<?> clazz) {
        Field[] fieldsArr = clazz.getDeclaredFields();
        List<FieldForSortting> fields = new ArrayList<>();
        List<FieldForSortting> annoNullFields = new ArrayList<>();
        for (Field field : fieldsArr) {
            ExcelCell ec = field.getAnnotation(ExcelCell.class);
            if (ec == null) {
                // 没有ExcelCell Annotation 视为不汇入
                continue;
            }
            int id = ec.index();
            fields.add(new FieldForSortting(field, id));
        }
        fields.addAll(annoNullFields);
        sortByProperties(fields, true, false, "index");
        return fields;
    }

    private static void sortByProperties(List<? extends Object> list, boolean isNullHigh,
                                         boolean isReversed, String... props) {
        if (CollectionUtils.isNotEmpty(list)) {
            Comparator<?> typeComp = ComparableComparator.getInstance();
            if (isNullHigh == true) {
                typeComp = ComparatorUtils.nullHighComparator(typeComp);
            } else {
                typeComp = ComparatorUtils.nullLowComparator(typeComp);
            }
            if (isReversed) {
                typeComp = ComparatorUtils.reversedComparator(typeComp);
            }

            List<Object> sortCols = new ArrayList<Object>();

            if (props != null) {
                for (String prop : props) {
                    sortCols.add(new BeanComparator(prop, typeComp));
                }
            }
            if (sortCols.size() > 0) {
                Comparator<Object> sortChain = new ComparatorChain(sortCols);
                Collections.sort(list, sortChain);
            }
        }
    }

    private static boolean isBlank(String str){
        if(str == null){
            return true;
        }
        return str.length() == 0;
    }

    public static boolean isNotBlank(String str){
        return !isBlank(str);
    }

}

测试一： 

import org.junit.Test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.*;

public class TestExportBean {
    @Test
    public void exportXls() throws IOException {
        //用排序的Map且Map的键应与ExcelCell注解的index对应
        Map<String,String> map = new LinkedHashMap<>();
        map.put("a","姓名");
        map.put("b","年龄");
        map.put("c","性别");
        map.put("d","出生日期");
        Collection<Object> dataset=new ArrayList<Object>();
        dataset.add(new Model("", "", "",null));
        dataset.add(new Model("fg", "25", "分隔符",null));
        dataset.add(new Model("王五", "34", "男",new Date()));
        File f=new File("test11.xls");
        OutputStream out =new FileOutputStream(f);

        ExcelUtil.exportExcel(map, dataset, out);
        out.close();
    }
}

测试二：

import org.junit.Test;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.*;

public class TestExportMap {
  @Test
  public void exportXls() throws IOException {
    List<Map<String,Object>> list = new ArrayList<>();
    Map<String,Object> map =new LinkedHashMap<>();
    map.put("name", "");
    map.put("age", "");
    map.put("birthday","");
    map.put("sex","");
    Map<String,Object> map2 =new LinkedHashMap<String, Object>();
    map2.put("name", "测试是否是中文长度不能自动宽度.测试是否是中文长度不能自动宽度.");
    map2.put("age", null);
    map2.put("sex", null);
    map.put("birthday",null);
    Map<String,Object> map3 =new LinkedHashMap<String, Object>();
    map3.put("name", "张三");
    map3.put("age", 12);
    map3.put("sex", "男");
    map3.put("birthday",new Date());
    list.add(map);
    list.add(map2);
    list.add(map3);
    Map<String,String> map1 = new LinkedHashMap<>();
    map1.put("name","姓名");
    map1.put("age","年龄");
    map1.put("birthday","出生日期");
    map1.put("sex","性别");
    File f= new File("test2.xls");
    OutputStream out = new FileOutputStream(f);
    ExcelUtil.exportExcel(map1,list, out );
    out.close();
  }
}

测试三：

import org.junit.Test;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.InputStream;
import java.util.Collection;
import java.util.Map;

/**
 * 测试导入Excel 97/2003
 */
public class TestImportExcel {

  @Test
  public void importXls() throws FileNotFoundException {
    File f=new File("src/test/resources/test.xls");
    InputStream inputStream= new FileInputStream(f);
    
    ExcelLogs logs =new ExcelLogs();
    Collection<Map> importExcel = ExcelUtil.importExcel(Map.class, inputStream, "yyyy/MM/dd HH:mm:ss", logs , 0);
    
    for(Map m : importExcel){
      System.out.println(m);
    }
  }

  @Test
  public void importXlsx() throws FileNotFoundException {
    File f=new File("src/test/resources/test.xlsx");
    InputStream inputStream= new FileInputStream(f);

    ExcelLogs logs =new ExcelLogs();
    Collection<Map> importExcel = ExcelUtil.importExcel(Map.class, inputStream, "yyyy/MM/dd HH:mm:ss", logs , 0);

    for(Map m : importExcel){
      System.out.println(m);
    }
  }

}