API:http://poi.apache.org/apidocs/index.html
1、
/**
* ClassName:ExcelReader.java
* Author: wenbin.ji
* CreateTime: Jan 28, 2011 11:16:29 AM
* Description:Excel數據讀取工具類，POI實現，兼容Excel2003，及Excel2007
**/
package com.company.utils;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.ss.usermodel.FormulaEvaluator;
import org.apache.poi.openxml4j.exceptions.InvalidFormatException;
import org.apache.poi.ss.usermodel.Cell;
import org.apache.poi.ss.usermodel.DateUtil;
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.ss.usermodel.WorkbookFactory;
public class ExcelReader {
Workbook wb = null;
List<String[]> dataList = new ArrayList<String[]>(100);
public ExcelReader(String path){
try {
InputStream inp = new FileInputStream(path);
wb = WorkbookFactory.create(inp);
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (InvalidFormatException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 取Excel所有數據，包含header
* @return List<String[]>
*/
public List<String[]> getAllData(int sheetIndex){
int columnNum = 0;
Sheet sheet = wb.getSheetAt(sheetIndex);
if(sheet.getRow(0)!=null){
columnNum = sheet.getRow(0).getLastCellNum()-sheet.getRow(0).getFirstCellNum();
}
if(columnNum>0){
for(Row row:sheet){
String[] singleRow = new String[columnNum];
int n = 0;
for(int i=0;i<columnNum;i++){
Cell cell = row.getCell(i, Row.CREATE_NULL_AS_BLANK);
switch(cell.getCellType()){
case Cell.CELL_TYPE_BLANK:
singleRow[n] = "";
break;
case Cell.CELL_TYPE_BOOLEAN:
singleRow[n] = Boolean.toString(cell.getBooleanCellValue());
break;
//數值
case Cell.CELL_TYPE_NUMERIC:
if(DateUtil.isCellDateFormatted(cell)){
singleRow[n] = String.valueOf(cell.getDateCellValue());
}else{
cell.setCellType(Cell.CELL_TYPE_STRING);// 沒有這句的話，碰到Number報錯：Cannot get a text value from a numeric cell
String temp = cell.getStringCellValue();
//判斷是否包含小數點，如果不含小數點，則以字符串讀取，如果含小數點，則轉換爲Double類型的字符串
if(temp.indexOf(".")>-1){
singleRow[n] = String.valueOf(new Double(temp)).trim();
}else{
singleRow[n] = temp.trim();
}
}
break;
case Cell.CELL_TYPE_STRING:
singleRow[n] = cell.getStringCellValue().trim();
break;
case Cell.CELL_TYPE_ERROR:
singleRow[n] = "";
break;
case Cell.CELL_TYPE_FORMULA:
cell.setCellType(Cell.CELL_TYPE_STRING);
singleRow[n] = cell.getStringCellValue();
if(singleRow[n]!=null){
singleRow[n] = singleRow[n].replaceAll("#N/A","").trim();
}
break;
default:
singleRow[n] = "";
break;
}
n++;
}
if("".equals(singleRow[0])){continue;}//如果第一行爲空，跳過
dataList.add(singleRow);
}
}
return dataList;
}
/**
* 返回Excel最大行index值，實際行數要加1
* @return
*/
public int getRowNum(int sheetIndex){
Sheet sheet = wb.getSheetAt(sheetIndex);
return sheet.getLastRowNum();
}
/**
* 返回數據的列數
* @return
*/
public int getColumnNum(int sheetIndex){
Sheet sheet = wb.getSheetAt(sheetIndex);
Row row = sheet.getRow(0);
if(row!=null&&row.getLastCellNum()>0){
return row.getLastCellNum();
}
return 0;
}
/**
* 獲取某一行數據
* @param rowIndex 計數從0開始，rowIndex爲0代表header行
* @return
*/
public String[] getRowData(int sheetIndex,int rowIndex){
String[] dataArray = null;
if(rowIndex>this.getColumnNum(sheetIndex)){
return dataArray;
}else{
dataArray = new String[this.getColumnNum(sheetIndex)];
return this.dataList.get(rowIndex);
}
}
/**
* 獲取某一列數據
* @param colIndex
* @return
*/
public String[] getColumnData(int sheetIndex,int colIndex){
String[] dataArray = null;
if(colIndex>this.getColumnNum(sheetIndex)){
return dataArray;
}else{
if(this.dataList!=null&&this.dataList.size()>0){
dataArray = new String[this.getRowNum(sheetIndex)+1];
int index = 0;
for(String[] rowData:dataList){
if(rowData!=null){
dataArray[index] = rowData[colIndex];
index++;
}
}
}
}
return dataArray;
}
}
參考：http://blog.csdn.net/jack0511/article/details/6179593
2、
package poi;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Iterator;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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;
public class ReadExcel001 {
public static void main(String[] args) {
readXml("D:/test.xlsx");
System.out.println("-------------");
readXml("d:/test2.xls");
}
public static void readXml(String fileName){
boolean isE2007 = false; //判斷是否是excel2007格式
if(fileName.endsWith("xlsx"))
isE2007 = true;
try {
InputStream input = new FileInputStream(fileName); //建立輸入流
Workbook wb = null;
//根據文件格式(2003或者2007)來初始化
if(isE2007)
wb = new XSSFWorkbook(input);
else
wb = new HSSFWorkbook(input);
Sheet sheet = wb.getSheetAt(0); //獲得第一個表單
Iterator<Row> rows = sheet.rowIterator(); //獲得第一個表單的迭代器
while (rows.hasNext()) {
Row row = rows.next(); //獲得行數據
System.out.println("Row #" + row.getRowNum()); //獲得行號從0開始
Iterator<Cell> cells = row.cellIterator(); //獲得第一行的迭代器
while (cells.hasNext()) {
Cell cell = cells.next();
System.out.println("Cell #" + cell.getColumnIndex());
switch (cell.getCellType()) { //根據cell中的類型來輸出數據
case HSSFCell.CELL_TYPE_NUMERIC:
System.out.println(cell.getNumericCellValue());
break;
case HSSFCell.CELL_TYPE_STRING:
System.out.println(cell.getStringCellValue());
break;
case HSSFCell.CELL_TYPE_BOOLEAN:
System.out.println(cell.getBooleanCellValue());
break;
case HSSFCell.CELL_TYPE_FORMULA:
System.out.println(cell.getCellFormula());
break;
default:
System.out.println("unsuported sell type");
break;
}
}
}
} catch (IOException ex) {
ex.printStackTrace();
}
}
}
參考：http://blog.csdn.net/shuwei003/article/details/67416493
3、
代碼如下
public class Test {
public static void main(String args[]){
try {
String excelFilePath = "F://會員導入模板.xls";
//模板.xlsx
Workbook wb = null;
int version=(excelFilePath.endsWith(".xls")?2003:2007);
if(version==2003){
try {
InputStream stream=new FileInputStream(new File(excelFilePath));
wb=new HSSFWorkbook(stream);
} catch (FileNotFoundException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
}else if(version==2007){
try {
InputStream stream=new FileInputStream(new File(excelFilePath));
wb=new XSSFWorkbook(stream);
} catch (IOException e1) {
e1.printStackTrace();
}
}
String bs ="";
Sheet sheet = wb.getSheetAt(0);
Row row = null;
int i=0;
for (Iterator<Row> rit = sheet.rowIterator(); rit.hasNext();) {
row = rit.next();
i++;
if(i>2){
int j=0;
bs+="(";
for (Iterator<Cell> cit = row.cellIterator(); cit.hasNext();) {
Cell cell = cit.next();
if(j>0){
System.out.println(cell.getStringCellValue());
}
j++;
}
bs+=")";
}
}
System.out.println(bs);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
參考：http://tiantianshagn.blog.163.com/blog/static/1676323272011101193551732/
4、
public class ReadExcel {
/**
* 對外提供讀取excel 的方法
* */
public static List<List<Object>> readExcel(File file) throws IOException{
String fileName = file.getName();
String extension = fileName.lastIndexOf(".")==-1?"":fileName.substring(fileName.lastIndexOf(".")+1);
if("xls".equals(extension)){
return read2003Excel(file);
}else if("xlsx".equals(extension)){
return read2007Excel(file);
}else{
throw new IOException("不支持的文件類型");
}
}
/**
* 讀取 office 2003 excel
* @throws IOException
* @throws FileNotFoundException */
private static List<List<Object>> read2003Excel(File file) throws IOException{
List<List<Object>> list = new LinkedList<List<Object>>();
HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = hwb.getSheetAt(0);
Object value = null;
HSSFRow row = null;
HSSFCell cell = null;
for(int i = sheet.getFirstRowNum();i<= sheet.getPhysicalNumberOfRows();i++){
row = sheet.getRow(i);
if (row == null) {
continue;
}
List<Object> linked = new LinkedList<Object>();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
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");// 格式化數字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
System.out.println(i+"行"+j+" 列 is String type");
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString());
if("@".equals(cell.getCellStyle().getDataFormatString())){
value = df.format(cell.getNumericCellValue());
} else if("General".equals(cell.getCellStyle().getDataFormatString())){
value = nf.format(cell.getNumericCellValue());
}else{
value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
}
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
System.out.println(i+"行"+j+" 列 is Boolean type");
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
System.out.println(i+"行"+j+" 列 is Blank type");
value = "";
break;
default:
System.out.println(i+"行"+j+" 列 is default type");
value = cell.toString();
}
if (value == null || "".equals(value)) {
continue;
}
linked.add(value);
}
list.add(linked);
}
return list;
}
/**
* 讀取Office 2007 excel
* */
private static List<List<Object>> read2007Excel(File file) throws IOException {
List<List<Object>> list = new LinkedList<List<Object>>();
// 構造 XSSFWorkbook 對象，strPath 傳入文件路徑
XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
// 讀取第一章表格內容
XSSFSheet sheet = xwb.getSheetAt(0);
Object value = null;
XSSFRow row = null;
XSSFCell cell = null;
for (int i = sheet.getFirstRowNum(); i <= sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
}
List<Object> linked = new LinkedList<Object>();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
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");// 格式化數字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
System.out.println(i+"行"+j+" 列 is String type");
value = cell.getStringCellValue();
break;
case XSSFCell.CELL_TYPE_NUMERIC:
System.out.println(i+"行"+j+" 列 is Number type ; DateFormt:"+cell.getCellStyle().getDataFormatString());
if("@".equals(cell.getCellStyle().getDataFormatString())){
value = df.format(cell.getNumericCellValue());
} else if("General".equals(cell.getCellStyle().getDataFormatString())){
value = nf.format(cell.getNumericCellValue());
}else{
value = sdf.format(HSSFDateUtil.getJavaDate(cell.getNumericCellValue()));
}
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
System.out.println(i+"行"+j+" 列 is Boolean type");
value = cell.getBooleanCellValue();
break;
case XSSFCell.CELL_TYPE_BLANK:
System.out.println(i+"行"+j+" 列 is Blank type");
value = "";
break;
default:
System.out.println(i+"行"+j+" 列 is default type");
value = cell.toString();
}
if (value == null || "".equals(value)) {
continue;
}
linked.add(value);
}
list.add(linked);
}
return list;
}
}
說明：該類中共封裝了三個方法，對外提供的讀取excel文件的方法，兩個私有的分別讀取excel2003和excel2007的方法。外部使用，只需調用readExcel 方法，傳入一個File 參數，程序根據文件擴展名來判斷選取那個方法來讀取Excel文件。
參考http://hi.baidu.com/%D2%BB%C6%F0%D7%DF%BA%F3/blog/item/81d938d06f16f281a1ec9c47.html