POI读取Excel
Posted 十一路客
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import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
public class ExcelReader
private static final Logger logger= LoggerFactory.getLogger(ExcelReader.class);
/*************************2015/3/24 用POI读取EXCEL************************/
/**
* @param path 文件路径
* @param fileType 文件扩展名
* @return map-success 是否成功 msg-错误信息 dataList 数据列表
* */
public static HashMap<String,Object> read(String path,String fileType) throws IOException
Boolean success = true; //是否正确标志 1-正确
String msg = "";
HashMap<String, Object> result = new HashMap<String, Object>();
List<List<Object>> dataList = new ArrayList<List<Object>>();
try
File file = new File(path);
if (fileType.equals("xls"))
dataList = read2003Excel(file);
else if (fileType.equals("xlsx"))
dataList = read2007Excel(file);
else
success = false;
msg = "您输入的Excel格式不正确";
logger.info("您输入的Excel格式不正确");
catch(Exception e)
success = false;
msg = "读取EXCEL的过程中出现了异常";
logger.info("捕捉到了异常： ");
logger.info(""+e);
result.put("success", success);
result.put("msg", msg);
result.put("dataList", dataList);
//输出读取的内容
/*for(int i=0; i<dataList.size(); i++)
logger.info("row " + i + ":");
List<Object> temp = dataList.get(i);
for(int j=0; j<temp.size(); j++)
logger.info(temp.get(j));
*/
return result;
/**
* 读取 office 2003 excel
*
* @throws IOException
* @throws FileNotFoundException
*/
private static List<List<Object>> read2003Excel(File file)
throws IOException
List<List<Object>> list = new ArrayList<List<Object>>();
HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = hwb.getSheetAt(0);
Object value = null;
HSSFRow row = null;
HSSFCell cell = null;
Short firstCellNumIndex = null;
Short lastCellNumIndex = null;
logger.info("sheet rows : " + sheet.getFirstRowNum() + " - " + sheet.getPhysicalNumberOfRows());
for (int i = sheet.getFirstRowNum(); i < sheet
.getPhysicalNumberOfRows(); i++)
row = sheet.getRow(i);
if (row == null)
continue;
List<Object> linked = new ArrayList<Object>();
//20160429 为空的个数
Integer emptyNum = 0;
//logger.info("row " + i + " cells : " + row.getFirstCellNum() + " - " + row.getLastCellNum());
if(row.getFirstCellNum()<0 || row.getLastCellNum()<0)
continue;
//20180115 统一用第一行标题行的row.getFirstCellNum()，row.getLastCellNum()，因为getFirstCellNum获取的是
//某行第一个实际单元格的下标 会自动忽略掉为null的单元格
if(firstCellNumIndex == null)
firstCellNumIndex = row.getFirstCellNum();
if(lastCellNumIndex == null)
lastCellNumIndex = row.getLastCellNum();
//logger.info("firstCellNumIndex: " + firstCellNumIndex + "; lastCellNumIndex: " + lastCellNumIndex);
for (int j = firstCellNumIndex; j < lastCellNumIndex; j++)
cell = row.getCell(j);
if (cell == null)
linked.add("");
emptyNum++;
continue;
DecimalFormat df = new DecimalFormat("0");// 格式化 number String
// 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
switch (cell.getCellType())
case XSSFCell.CELL_TYPE_STRING:
//logger.info(i + "行" + j + " 列 is String type");
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
//logger.info(i + "行" + j + " 列 is Number type ; DateFormt:" + cell.getCellStyle().getDataFormatString());
if(DateUtil.isCellDateFormatted(cell))
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
else
cell.setCellType(Cell.CELL_TYPE_STRING);
String temp = cell.getStringCellValue();
// 判断是否包含小数点，如果不含小数点，则以字符串读取，如果含小数点，则转换为Double类型的字符串
if (temp.indexOf(".") > -1)
value = nf.format(new Double(temp.trim()));
else
value = temp.trim();
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
//logger.info(i + "行" + j + " 列 is Boolean type");
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
//logger.info(i + "行" + j + " 列 is Blank type");
value = "";
break;
default:
//logger.info(i + "行" + j + " 列 is default type");
value = cell.toString();
if (value == null || "".equals(value))
linked.add("");
emptyNum++;
continue;
linked.add(value);
// for cells
//20160429
if(emptyNum.equals(row.getLastCellNum() - row.getFirstCellNum()))//一行全为空
logger.info("第" + i + "行为空！");
continue;
//logger.info("row i[" + i + "] size: " + linked.size());
list.add(linked);
return list;
/**
* 读取Office 2007 excel
* */
private static List<List<Object>> read2007Excel(File file)
throws IOException
List<List<Object>> list = new ArrayList<List<Object>>();
// 构造 XSSFWorkbook 对象，strPath 传入文件路径
XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
// 读取第一章表格内容
XSSFSheet sheet = xwb.getSheetAt(0);
Object value = null;
XSSFRow row = null;
XSSFCell cell = null;
logger.info("sheet rows : " + sheet.getFirstRowNum() + " - " + sheet.getPhysicalNumberOfRows());
Short firstCellNumIndex = null;
Short lastCellNumIndex = null;
for (int i = sheet.getFirstRowNum(); i < sheet
.getPhysicalNumberOfRows(); i++)
row = sheet.getRow(i);
if (row == null)
continue;
List<Object> linked = new ArrayList<Object>();
//20160429 为空的个数
Integer emptyNum = 0;
//logger.info("row " + i + " : " + row.getFirstCellNum() + " - " + row.getLastCellNum());
if(row.getFirstCellNum()<0 || row.getLastCellNum()<0)
continue;
//20180115 统一用第一行标题行的row.getFirstCellNum()，row.getLastCellNum()，因为getFirstCellNum获取的是
//某行第一个实际单元格的下标 会自动忽略掉为null的单元格
if(firstCellNumIndex == null)
firstCellNumIndex = row.getFirstCellNum();
if(lastCellNumIndex == null)
lastCellNumIndex = row.getLastCellNum();
//logger.info("firstCellNumIndex: " + firstCellNumIndex + "; lastCellNumIndex: " + lastCellNumIndex);
for (int j = firstCellNumIndex; j < lastCellNumIndex; j++)
cell = row.getCell(j);
if (cell == null)
linked.add("");
emptyNum++;
continue;
DecimalFormat df = new DecimalFormat("0");// 格式化 number String
// 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
switch (cell.getCellType())
case XSSFCell.CELL_TYPE_STRING:
//logger.info(i + "行" + j + " 列 is String type");
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
// logger.info(i + "行" + j + " 列 is Number type ; DateFormt:" + cell.getCellStyle().getDataFormatString());
if(DateUtil.isCellDateFormatted(cell))
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
else
cell.setCellType(Cell.CELL_TYPE_STRING);
String temp = cell.getStringCellValue();
// 判断是否包含小数点，如果不含小数点，则以字符串读取，如果含小数点，则转换为Double类型的字符串
if (temp.indexOf(".") > -1)
value = nf.format(new Double(temp.trim()));
else
value = temp.trim();
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
//logger.info(i + "行" + j + " 列 is Boolean type");
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
//logger.info(i + "行" + j + " 列 is Blank type");
value = "";
break;
default:
//logger.info(i + "行" + j + " 列 is default type");
cell.setCellType(Cell.CELL_TYPE_STRING);
String temp = cell.getStringCellValue();
value = temp.trim();
if (value == null || "".equals(value))
linked.add("");
emptyNum++;
continue;
linked.add(value);
if(emptyNum.equals(row.getLastCellNum() - row.getFirstCellNum()))//一行全为空
logger.info("第" + i + "行为空！");
continue;
list.add(linked);
return list;
//20160517 Excel 读取
/*public static void main(String[] args) throws IOException
HashMap<String, Object> result = read("D:/CITY_LIST.xls", "xls");
if(result != null)
List<List<Object>> dataList = (List<List<Object>>)result.get("dataList");
//logger.info("dataList.size: " + dataList.size());
System.out.println(("dataList.size: " + dataList.size()));
for(int i=1; i<dataList.size(); i++)
List<Object> tempList = dataList.get(i);
String insertSql = "INSERT INTO STATISTIC_CITY(ID,CITY_NAME) VALUES(";
for(int j=0; j<tempList.size(); j++)
//System.out.println("i - " + i + ", j- " + j + " : " + tempList.get(j));
if(j>0)
insertSql += ",'" + tempList.get(j) + "'";
else
insertSql += tempList.get(j);
insertSql += ");";
System.out.println(insertSql);
*/
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