excel工具类

excel工具类

import com.iport.framework.util.ValidateUtil;
import org.apache.commons.lang3.StringUtils;
import org.apache.log4j.Logger;
import org.apache.poi.POIXMLDocument;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.openxml4j.opc.OPCPackage;
import org.apache.poi.poifs.filesystem.POIFSFileSystem;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.apache.poi.ss.usermodel.Workbook;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.IOException;
import java.io.InputStream;
import java.io.PushbackInputStream;
import java.lang.reflect.Field;
import java.sql.Time;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * Created by admin on 2016/8/26.
 */
public class PoiUtil {
    private static Logger  logger = Logger.getLogger(PoiUtil.class);

    public static <T> List<T> getExcelData(String mapFilePath, Class<T> cla, InputStream inputStream) throws Exception{
        List<T>  dataList = new ArrayList<T>();
        //获取配置数据
        JaxbUtil jaxb = new JaxbUtil(TemplateExcelMap.class);
        TemplateExcelMap template = jaxb.fromPath(mapFilePath, false);
        List<ExcelMap> mapList = template.getColumnList();
        Map<String,String> nameFieldMap = new HashMap<String,String>();
        Map<Integer,Field> IndexFieldMap = new HashMap<Integer,Field>();
        Map<Integer,ExcelMap> mapMap = new HashMap<Integer,ExcelMap>();
        Map<String,ExcelMap> strMap = new HashMap<String,ExcelMap>();
        for(ExcelMap m : mapList){
            nameFieldMap.put(m.getColumnName().trim(), m.getFieldName());
            strMap.put(m.getColumnName().trim(), m);
        }

        Workbook book = getWorkbook(inputStream);
        Sheet sheet = book.getSheetAt(0);
        Row row0 = sheet.getRow(0);
        int celNum = row0.getPhysicalNumberOfCells();

        //头部数据获取映射
        for(int i=0; i<celNum; i++){
            Cell cell = row0.getCell(i);
            String headDesc = cell.getStringCellValue();
            if(!ValidateUtil.isEmpty(headDesc)){
                if(nameFieldMap.containsKey(headDesc.trim())){
                    String fieldName =  nameFieldMap.get(headDesc.trim());
                    IndexFieldMap.put(i, getField(fieldName, cla));
                    mapMap.put(i, strMap.get(headDesc.trim()));
                }
            }
        }
        long s = System.currentTimeMillis();
        int rowNum = sheet.getPhysicalNumberOfRows();
        Set<Integer> keys = IndexFieldMap.keySet();
        if(keys.size() > 0){
            for(int i=1;i<rowNum;i++){
                Row row = sheet.getRow(i);
                T vo = (T)cla.newInstance();
                for(Integer columIndex : keys){
                    Cell cel = row.getCell(columIndex);
                    Field field = IndexFieldMap.get(columIndex);
                    ExcelMap mapping =  mapMap.get(columIndex);
                    Object o =  getCellValue(cel, field.getType(), mapping);
                    //try{
                        field.set(vo,o);
                   // }catch (Exception e){
                    //    e.printStackTrace();
                    //}

                }
                dataList.add(vo);
            }
        }
        long e = System.currentTimeMillis();
        logger.debug("数据导入解析耗时："+(e-s));
        return dataList;
    }

    public static Workbook getWorkbook(InputStream inputStream) throws IOException, InvalidFormatException {
        Workbook book = null;
        if (!(inputStream.markSupported())) {
            inputStream = new PushbackInputStream(inputStream, 8);
        }
        if (POIFSFileSystem.hasPOIFSHeader(inputStream)) {
            book = new HSSFWorkbook(inputStream);
        } else if (POIXMLDocument.hasOOXMLHeader(inputStream)) {
            book = new XSSFWorkbook(OPCPackage.open(inputStream));
        }
        return book;
    }

    private static Field getField(String filedName, Class cla) throws Exception{
        Field field  = cla.getDeclaredField(filedName);
        if(field!=null){
            field.setAccessible(true);
        }
        return field;
    };

    /**
     * 获取单元格内容
     * @param cell
     * @param fieldClass
     * @param mapping
     * @return
     * @throws Exception
     */
    private static Object getCellValue(Cell cell, Class fieldClass, ExcelMap mapping) throws Exception{
        if (cell == null) {
            return null;
        }
        Object result = null;
        if ("class java.util.Date".equals(fieldClass.toString()) || ("class java.sql.Time").equals(fieldClass.toString())) {
            if (Cell.CELL_TYPE_NUMERIC == cell.getCellType()) {
                result = cell.getDateCellValue();
            } else {
                cell.setCellType(Cell.CELL_TYPE_STRING);
                result = getDateData(mapping, cell.getStringCellValue());
            }
            if ( result != null && ("class java.sql.Time").equals(fieldClass.toString())) {
                result = new Time(((Date) result).getTime());
            }
        } else if (Cell.CELL_TYPE_NUMERIC == cell.getCellType()) {
            double doubleVal = cell.getNumericCellValue();
            if("class java.lang.Double".equals(fieldClass.toString())){
                result = doubleVal;
            }else{
                    long longVal = Math.round(cell.getNumericCellValue());
                    if(Double.parseDouble(longVal + ".0") == doubleVal){
                        try{
                            result = (int) longVal;
                        }catch (Exception e){
                            result = longVal;
                       }
                    }else {
                        result = doubleVal;
                    }
            }
        } else if (Cell.CELL_TYPE_BOOLEAN == cell.getCellType()) {
            result = cell.getBooleanCellValue();
        } else {
            result = cell.getStringCellValue();
            if(ValidateUtil.isEmpty((String)result)){
                result = null;
            }
        }
        return result;
    }

    /**
     * 获取日期类型数据
     *
     * @Author JueYue
     * @date 2013年11月26日
     * @param entity
     * @param value
     * @return
     */
    private static Date getDateData(ExcelMap entity, String value) {
        String formatStr = entity.getFormat();
        if(!ValidateUtil.isEmpty(formatStr)){
         String[] formats = formatStr.split(";");
          for(int i = 0; i<formats.length; i++){
              try{
                  Date d = formartData(formats[i], value);
                  if(d!=null){
                      return  d;
                  }
              }catch (Exception e){
                  logger.error(formats[i]+"日期转换"+value+"异常" + e.getMessage());
              }
          }
        }
        return null;
    }

    private static Date formartData(String formatStr, String value){
        if (StringUtils.isNotEmpty(formatStr) && StringUtils.isNotEmpty(value)) {
            SimpleDateFormat format = new SimpleDateFormat(formatStr);
            try {
                return format.parse(value);
            } catch (ParseException e) {
                throw new RuntimeException("Excel 值获取失败");
            }
        }
        return null;
    }


}