excel表格导入数据库后台JAVA方法

public class ReadExcal {
/**
* 对外提供读取excel 的方法
* */
public List<List<Object>> readExcel(File file) throws IOException {
String fileName = file.getName();
System.out.println("文件名："+fileName);
String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName
.substring(fileName.lastIndexOf(".") + 1);
System.out.println("文件类型："+extension);
if ("xls".equals(extension)) {
return read2003Excel(file);
} else if ("xlsx".equals(extension)) {
return read2007Excel(file);
} else {
throw new IOException("不支持的文件类型");
}
}

public static Workbook create(InputStream inp) throws IOException,InvalidFormatException {
if (!inp.markSupported()) {
inp = new PushbackInputStream(inp, 8);
}
if (POIFSFileSystem.hasPOIFSHeader(inp)) {
return new HSSFWorkbook(inp);
}
if (POIXMLDocument.hasOOXMLHeader(inp)) {
return new XSSFWorkbook(OPCPackage.open(inp));
}
throw new IllegalArgumentException("你的excel版本目前poi解析不了");
}

/**
* 读取 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>>();
Workbook hwb=null;
try {
hwb = create(new FileInputStream(file));
} catch (InvalidFormatException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

//HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
//表单里的第几张表
int size=hwb.getNumberOfSheets();
for(int k=0;k<size;k++){
Sheet sheet = hwb.getSheetAt(k);
Object value = null;
Row row = null;
Cell cell = null;
int counter = 0;
for (int i = sheet.getFirstRowNum()+1; counter+1 < sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
} else {
counter++;
}
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");// 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:
//  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;
}

/**
* 读取Office 2007 excel
* */
private static List<List<Object>> read2007Excel(File file)
throws IOException {
System.out.println("进入2007excel");
List<List<Object>> list=null;
Workbook xwb=null;
Sheet sheet=null;

try{
list = new LinkedList<List<Object>>();
// 构造 XSSFWorkbook 对象，strPath 传入文件路径
//(jdk版本是否大于1.6.0_18,若没有，则会在new XSSFWorkbook()时报错)
//xwb = new XSSFWorkbook(new FileInputStream(file));

xwb=create(new FileInputStream(file));
// 读取第一章表格内容

}catch(Exception e){
System.out.println(e);
}
System.out.println(list.size()+"-"+xwb.getNumberOfSheets());
for( int o=0;o<xwb.getNumberOfSheets();o++){
sheet = xwb.getSheetAt(o);
Object value = null;
Row row = null;
Cell cell = null;
int counter = 0;
for (int i = sheet.getFirstRowNum()+1; counter+1 < sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
} else {
counter++;
}
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");// 格式化数字
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:

4000
//  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);
}
}
System.out.println("size:"+list.size());
return list;
}