import java.io.File;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
import org.apache.commons.io.FileUtils;
import au.com.bytecode.opencsv.CSVReader;
public class ReadCsv {
@SuppressWarnings("unchecked")
public static List<String[]> readCsv(String excelFilePath, int startRowNum){
List<String[]> excelContent = new ArrayList<String[]>();
CSVReader reader = null;
File tempFile = null;
try {
tempFile = new File(excelFilePath);
reader = new CSVReader(new InputStreamReader(FileUtils.openInputStream(tempFile)));
excelContent = reader.readAll();
if(startRowNum>0){
Iterator<String[]> it = excelContent.iterator();
int i=0;
while(it.hasNext()){
it.next();
if(i<startRowNum){
it.remove();
i++;
}else{
break;
}
}
}
reader.close();
} catch (IOException e) {
e.printStackTrace();
}
return excelContent;
}
}
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
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 au.com.bytecode.opencsv.CSVWriter;
/**
* 读取Excel中的文件
*
* @author JS
* @date 2013-06-18
*/
public class ReadExcel {
public ReadExcel() {
}
/**
* 读取Excel文件中的数据(支持2003和2007)
*
* @param excelFilePath Excel文件存放的路径
* @param startRowNum 解析Excel文件，从哪一行开始0表示从第一行开始
*
* @return
*
* @throws IOException
*
* @author JS
*/
public static List<String[]> read2003And2007(String excelFilePath, int startRowNum) throws IOException{
List<String[]> excelContent = new ArrayList<String[]>();
Cell cell = null;
Row row=null;
Sheet sheet=null;
Workbook wb = null;
InputStream stream=null;
try {
if (excelFilePath.endsWith(".xls")){
stream = new FileInputStream(excelFilePath);
wb = (Workbook) new HSSFWorkbook(stream);
} else if (excelFilePath.endsWith(".xlsx")){
wb = (Workbook) new XSSFWorkbook(excelFilePath);
}
if(wb==null){
return null;
}
DecimalFormat df = new DecimalFormat("####.##");
SimpleDateFormat smtDate = new SimpleDateFormat("yyyy/MM/dd");
sheet = wb.getSheetAt(0);
// 行数(从0开始,相当于最后一行的索引)
int count_row=sheet.getPhysicalNumberOfRows();
Row firstRow=sheet.getRow(0);
if(firstRow==null){
return null;
}
String[] temp=null;
//列数
int count_cell=firstRow.getPhysicalNumberOfCells();
for (int i = startRowNum; i <=count_row; i++) {
row=sheet.getRow(i);
if(row==null){
continue;
}
temp=new String[count_cell];
for (int j = 0; j < count_cell; j++) {
cell=row.getCell(j);
if(null == cell) {
temp[j] = "";
continue;
}
int type = cell.getCellType(); // 得到单元格数据类型
switch (type) { // 判断数据类型
case Cell.CELL_TYPE_BLANK:
temp[j] = "";
break;
case Cell.CELL_TYPE_BOOLEAN:
temp[j] = cell.getBooleanCellValue() + "";
break;
case Cell.CELL_TYPE_ERROR:
temp[j] = cell.getErrorCellValue() + "";
break;
case Cell.CELL_TYPE_FORMULA:
temp[j] = cell.getCellFormula();
break;
case Cell.CELL_TYPE_NUMERIC:
if (HSSFDateUtil.isCellDateFormatted(cell)) {
double d = cell.getNumericCellValue();
Date date = HSSFDateUtil.getJavaDate(d);
temp[j] = smtDate.format(date);
}else{
temp[j] = df.format(cell.getNumericCellValue());
}
break;
case Cell.CELL_TYPE_STRING:
temp[j] = cell.getStringCellValue();
break;
default:
temp[j] = cell.getStringCellValue();
break;
}
if (null != temp[j])temp[j] = temp[j].trim();
}
excelContent.add(temp);
}
cell=null;
row=null;
sheet=null;
wb=null;
temp=null;
} catch (Exception e) {
e.printStackTrace();
}finally{
if(stream!=null){
stream.close();
}
}
return excelContent;
}
public static List<String[]> readSheet(Sheet sheet,int startRowNum) throws IOException{
if(sheet==null){
return null;
}
List<String[]> excelContent = new ArrayList<String[]>();
Cell cell = null;
Row row=null;
DecimalFormat df = new DecimalFormat("####.##");
// 行数(从0开始,相当于最后一行的索引)
int count_row=sheet.getPhysicalNumberOfRows();
//列数
Row firstRow=sheet.getRow(0);
if(firstRow==null){
return null;
}
int count_cell=firstRow.getPhysicalNumberOfCells();
for (int i = startRowNum; i <=count_row; i++) {
row=sheet.getRow(i);
if(row==null){
continue;
}
String temp[] = new String[count_cell];
for (int j = 0; j < count_cell; j++) {
cell=row.getCell(j);
if(null == cell) {
temp[j] = "";
continue;
}
int type = cell.getCellType(); // 得到单元格数据类型
switch (type) { // 判断数据类型
case Cell.CELL_TYPE_BLANK:
temp[j] = "";
break;
case Cell.CELL_TYPE_BOOLEAN:
temp[j] = cell.getBooleanCellValue() + "";
break;
case Cell.CELL_TYPE_ERROR:
temp[j] = cell.getErrorCellValue() + "";
break;
case Cell.CELL_TYPE_FORMULA:
temp[j] = cell.getCellFormula();
break;
case Cell.CELL_TYPE_NUMERIC:
temp[j] = df.format(cell.getNumericCellValue());
break;
case Cell.CELL_TYPE_STRING:
temp[j] = cell.getStringCellValue();
break;
default:
temp[j] = cell.getStringCellValue();
break;
}
if (null != temp[j])temp[j] = temp[j].trim();
}
excelContent.add(temp);
}
cell=null;
row=null;
sheet=null;
return excelContent;
}
@SuppressWarnings("unchecked")
public static void exportExcel(List<Object> listRow,String[] titles,String fileName){
OutputStream out=null;
try {
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet sheet = wb.createSheet("sheet1");
HSSFRow rowtitle = sheet.createRow(0);
for (int i = 0; i < titles.length; i++) {
HSSFCell cell = rowtitle.createCell(i);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(titles[i]);
}
for (int i = 1; i <= listRow.size(); i++) {
HSSFRow row = sheet.createRow(i);
List<String> values=((List<String>)listRow.get(i-1));
if(values!=null&&values.size()>0){
for (int j = 0; j < values.size(); j++) {
HSSFCell cell = row.createCell( j);
cell.setCellType(HSSFCell.CELL_TYPE_STRING);
cell.setCellValue(values.get(j));
}
}
}
File file=new File(fileName);
out = new FileOutputStream(file);
wb.write(out);
out.flush();
} catch (Exception e) {
e.printStackTrace();
}finally{
try {
if(out!=null){
out.close();
}
} catch (Exception e2) {
}
}
}
}