Java POI Excel读取（已验证）

poi的
pom文件：

<!-- Apache's poi-->
        <dependency>
            <groupId>org.apache.poi</groupId>
            <artifactId>poi</artifactId>
            <version>3.17</version>
        </dependency>

Excel表格时间问题：
1.产品经理发我的文档

2.在时间问题后面新建一列：=text(点击需要改变的值，“需要的格式”) 再双击加号，就可以全部生成

3.Ctrl+c 复制内容，右击，选择粘贴数值
再 数据–>反列–>

重要的是选择：文本

结果

Java的工具类：ExportReadUtills`

package com.tonul.core.util;


import com.tonul.core.entity.ExportRead;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.Row;
import org.apache.poi.ss.usermodel.Sheet;
import org.springframework.test.util.ReflectionTestUtils;

import java.beans.PropertyDescriptor;
import java.io.*;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.*;

/**
 * 读取上篇中的xls文件的内容，并打印出来
 *
 * @author Administrator
 */
public class ExportReadUtills {

    /**
          * 
          * @author 
          * May 30, 2016 5:39:01 PM
          * @param beginRow
          * @param beanpros
          * @param classPathName
          * @param results
          * @param sheet
          * @return
          */
    public String getDatasByrc(int beginRow,Map<Integer,String> beanpros,String classPathName,List<Object> results,Sheet sheet){
        try {
            SimpleDateFormat df = new SimpleDateFormat("YYYY-MM-DD");
			//获取到实体类
            ClassLoader classLoader = ReflectionTestUtils.class.getClassLoader();
            Class clazz = classLoader.loadClass("com.tonul.core.entity.ExportRead");
            Set<Integer> set = beanpros.keySet() ;
            Row row = sheet.getRow(beginRow);
            while(row!=null) {
                Object obj = clazz.newInstance() ;
                for(Integer key:set){
                    String value = "" ;
                    if(row!=null){
                        Cell cell = row.getCell(key) ;
                        if(cell!=null){
                            int type = cell.getCellType() ;
                            if(type == Cell.CELL_TYPE_STRING){
                                value = cell.getStringCellValue() ;
                            }else if(type==Cell.CELL_TYPE_NUMERIC||type==Cell.CELL_TYPE_FORMULA){
                                // value = String.valueOf(df.format(cell.getDateCellValue()));
//                                value = String.valueOf(cell.getDateCellValue());
                               value = String.valueOf(cell.getNumericCellValue());
                            }else if(type==Cell.CELL_TYPE_BOOLEAN){
                                value = String.valueOf(cell.getBooleanCellValue()) ;
                            }
                        }
                    }
                    PropertyDescriptor pd = new PropertyDescriptor(beanpros.get(key),clazz);
                    Method wM = pd.getWriteMethod();
                    wM.invoke(obj, value);
                }
                results.add(obj);
                row = sheet.getRow(++beginRow);
            }
        } catch (Exception e) {
            e.printStackTrace();
            return "用于接受结果的bean不存在";
        }
        return null;
    }

    public static void main(String[] args) {
        ExportReadUtills mer = new ExportReadUtills() ;
        try {
            HSSFWorkbook wb = new HSSFWorkbook(new FileInputStream(new File("D:\\共享农业\\童优乐\\文档\\0712星期日\\1231.xls")));
            Sheet sheet = wb.getSheetAt(0);
            List<Object> results = new ArrayList<Object>() ;
            Map<Integer,String> beanpros = new HashMap<Integer, String>() ;
            beanpros.put(0, "payTime");
            beanpros.put(1, "orderNo");
            beanpros.put(2, "sellingType");
            beanpros.put(3, "orderTime");
            beanpros.put(4, "storesName");
            beanpros.put(5, "name");
            beanpros.put(6, "phone");
            beanpros.put(7, "ordeMoney");
            beanpros.put(8, "vouchersName");
            beanpros.put(9, "vouchersType");
            beanpros.put(10, "orderNumber");
            beanpros.put(11, "orderStates");
            String s = mer.getDatasByrc(0, beanpros, "ExportRead", results, sheet);
            int i=0;
            if(s==null){
                for(Object obj:results){
                    ExportRead bean = (ExportRead) obj ;
                    System.out.println(bean);
                    //1、写逻辑代码
                    i++;
                }
            }
            System.out.println(i);
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}

实体类打印出来了，完成