该工具类可以读取excel2007,excel2003等格式的文件，xls、xlsx文件格式
package com.visolink; import org.apache.poi.hssf.usermodel.*;
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.XSSFWorkbook; import java.io.*;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
import java.util.Set; public class ExcelReader {
private POIFSFileSystem fs;
private Workbook wb;
private Sheet sheet;
private Row row; /**
* 读取Excel表格表头的内容
* @param file
* @return String 表头内容的数组
*/
public String[] readExcelTitle(File file) {
try {
InputStream is=new FileInputStream(file); if(file.getName().toLowerCase().endsWith(".xls")){
fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(fs);
}
else{
wb=new XSSFWorkbook(is);
}
} catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
row = sheet.getRow(0);
// 标题总列数
int colNum = row.getPhysicalNumberOfCells();
System.out.println("colNum:" + colNum);
String[] title = new String[colNum];
for (int i = 0; i < colNum; i++) {
//title[i] = getStringCellValue(row.getCell((short) i));
title[i] = getCellFormatValue(row.getCell((short) i));
}
return title;
} /**
* 读取Excel数据内容
* @param file
* @return Map 包含单元格数据内容的Map对象
*/
public Map<Integer, String> readExcelContent(File file) {
Map<Integer, String> content = new HashMap<Integer, String>();
String str = "";
try {
InputStream is=new FileInputStream(file);
if(file.getName().toLowerCase().endsWith(".xls")){
//fs = new POIFSFileSystem(is);
wb = new HSSFWorkbook(is);
}else{
wb=new XSSFWorkbook(is);
} } catch (IOException e) {
e.printStackTrace();
}
sheet = wb.getSheetAt(0);
// 得到总行数
int rowNum = sheet.getLastRowNum();
row = sheet.getRow(0);
int colNum = row.getPhysicalNumberOfCells();
// 正文内容应该从第二行开始,第一行为表头的标题
for (int i = 1; i <= rowNum; i++) {
row = sheet.getRow(i);
int j = 0;
while (j < colNum) {
// 每个单元格的数据内容用"-"分割开，以后需要时用String类的replace()方法还原数据
// 也可以将每个单元格的数据设置到一个javabean的属性中，此时需要新建一个javabean
// str += getStringCellValue(row.getCell((short) j)).trim() +
// "-";
str += getCellFormatValue(row.getCell((short) j)).trim() + " ";
j++;
}
content.put(i, str);
str = "";
}
return content;
} /**
* 获取单元格数据内容为字符串类型的数据
*
* @param cell Excel单元格
* @return String 单元格数据内容
*/
private String getStringCellValue(HSSFCell cell) {
String strCell = "";
switch (cell.getCellType()) {
case HSSFCell.CELL_TYPE_STRING:
strCell = cell.getStringCellValue();
break;
case HSSFCell.CELL_TYPE_NUMERIC:
strCell = String.valueOf(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
strCell = String.valueOf(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_BLANK:
strCell = "";
break;
default:
strCell = "";
break;
}
if (strCell.equals("") || strCell == null) {
return "";
}
if (cell == null) {
return "";
}
return strCell;
} /**
* 获取单元格数据内容为日期类型的数据
*
* @param cell
* Excel单元格
* @return String 单元格数据内容
*/
private String getDateCellValue(HSSFCell cell) {
String result = "";
try {
int cellType = cell.getCellType();
if (cellType == HSSFCell.CELL_TYPE_NUMERIC) {
Date date = cell.getDateCellValue();
result = (date.getYear() + 1900) + "-" + (date.getMonth() + 1)
+ "-" + date.getDate();
} else if (cellType == HSSFCell.CELL_TYPE_STRING) {
String date = getStringCellValue(cell);
result = date.replaceAll("[年月]", "-").replace("日", "").trim();
} else if (cellType == HSSFCell.CELL_TYPE_BLANK) {
result = "";
}
} catch (Exception e) {
System.out.println("日期格式不正确!");
e.printStackTrace();
}
return result;
} /**
* 根据HSSFCell类型设置数据
* @param cell
* @return
*/
private String getCellFormatValue(Cell cell) {
String cellvalue = "";
if (cell != null) {
// 判断当前Cell的Type
switch (cell.getCellType()) {
// 如果当前Cell的Type为NUMERIC
case HSSFCell.CELL_TYPE_NUMERIC:
case HSSFCell.CELL_TYPE_FORMULA: {
// 判断当前的cell是否为Date
if (HSSFDateUtil.isCellDateFormatted(cell)) {
// 如果是Date类型则，转化为Data格式 //方法1：这样子的data格式是带时分秒的：2011-10-12 0:00:00
//cellvalue = cell.getDateCellValue().toLocaleString(); //方法2：这样子的data格式是不带带时分秒的：2011-10-12
Date date = cell.getDateCellValue();
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
cellvalue = sdf.format(date); }
// 如果是纯数字
else {
// 取得当前Cell的数值
cellvalue = String.valueOf(cell.getNumericCellValue());
}
break;
}
// 如果当前Cell的Type为STRIN
case HSSFCell.CELL_TYPE_STRING:
// 取得当前的Cell字符串
cellvalue = cell.getRichStringCellValue().getString();
break;
// 默认的Cell值
default:
cellvalue = " ";
}
} else {
cellvalue = "";
}
return cellvalue; } public static void main(String[] args) { try { System.out.println("开始");
File file=new File("D:\\用户列表测试.xlsx");
ExcelReader er=new ExcelReader();
String [] titles=er.readExcelTitle(file);
for(String title:titles){
System.out.println(title);
} Map<Integer,String> contents= er.readExcelContent(file);
Set<Integer> contentsKey=contents.keySet();
for(Integer key:contentsKey){
System.out.println("第"+key+"行："+contents.get(key));
} }catch(Exception e){ e.getMessage();
}
}
}