建立工程前需要导入POI包。POI相关jar包下载地址：http://poi.apache.org/download.html
1.解析.xlsx后缀名的的EXCEL文件：
代码如下packagecom.shuai.hello;
importjava.io.FileInputStream;
importjava.io.IOException;
importjava.io.InputStream;
importorg.apache.poi.hssf.usermodel.HSSFCell;
importorg.apache.poi.xssf.usermodel.XSSFCell;
importorg.apache.poi.xssf.usermodel.XSSFRow;
importorg.apache.poi.xssf.usermodel.XSSFSheet;
importorg.apache.poi.xssf.usermodel.XSSFWorkbook;
publicclassReadExcel {
publicstaticvoidmain(String[] args)throwsIOException {
//File file = new File("C:/Users.xlsx");
InputStream stream =newFileInputStream("C:/Users.xlsx");
XSSFWorkbook xssfWorkbook =newXSSFWorkbook(stream);
XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(0);
introwstart = xssfSheet.getFirstRowNum();
introwEnd = xssfSheet.getLastRowNum();
for(inti=rowstart;i<=rowEnd;i++)
{
XSSFRow row = xssfSheet.getRow(i);
if(null== row)continue;
intcellStart = row.getFirstCellNum();
intcellEnd = row.getLastCellNum();
for(intk=cellStart;k<=cellEnd;k++)
{
XSSFCell cell = row.getCell(k);
if(null==cell)continue;
switch(cell.getCellType())
{
caseHSSFCell.CELL_TYPE_NUMERIC:// 数字
System.out.print(cell.getNumericCellValue()
+"\t");
break;
caseHSSFCell.CELL_TYPE_STRING:// 字符串
System.out.print(cell.getStringCellValue()
+"\t");
break;
caseHSSFCell.CELL_TYPE_BOOLEAN:// Boolean
System.out.println(cell.getBooleanCellValue()
+"\t");
break;
caseHSSFCell.CELL_TYPE_FORMULA:// 公式
System.out.print(cell.getCellFormula() +"\t");
break;
caseHSSFCell.CELL_TYPE_BLANK:// 空值
System.out.println(" ");
break;
caseHSSFCell.CELL_TYPE_ERROR:// 故障
System.out.println(" ");
break;
default:
System.out.print("未知类型 ");
break;
}
}
System.out.print("\n");
}
}
}
/*String fileType = filePath.substring(filePath.lastIndexOf(".") + 1, filePath.length());
InputStream stream = new FileInputStream(filePath);
Workbook wb = null;
if (fileType.equals("xls")) {
wb = new HSSFWorkbook(stream);
} else if (fileType.equals("xlsx")) {
wb = new XSSFWorkbook(stream);
} else {
System.out.println("您输入的excel格式不正确");
}*/
2.解析后缀为.xls的EXCEL文件：
代码如下packagecom.shuai.hello;
importjava.io.File;
importjava.io.FileInputStream;
importjava.io.IOException;
importorg.apache.poi.hssf.usermodel.HSSFCell;
importorg.apache.poi.hssf.usermodel.HSSFRow;
importorg.apache.poi.hssf.usermodel.HSSFSheet;
importorg.apache.poi.hssf.usermodel.HSSFWorkbook;
importorg.apache.poi.poifs.filesystem.POIFSFileSystem;
publicclassReadXls {
publicstaticvoidmain(String[] args)throwsIOException, IOException {
File file =newFile("C:/Users/dengta/Desktop/ok1.xls");
POIFSFileSystem poifsFileSystem =newPOIFSFileSystem(newFileInputStream(file));
HSSFWorkbook hssfWorkbook =newHSSFWorkbook(poifsFileSystem);
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
introwstart = hssfSheet.getFirstRowNum();
introwEnd = hssfSheet.getLastRowNum();
for(inti=rowstart;i<=rowEnd;i++)
{
HSSFRow row = hssfSheet.getRow(i);
if(null== row)continue;
intcellStart = row.getFirstCellNum();
intcellEnd = row.getLastCellNum();
for(intk=cellStart;k<=cellEnd;k++)
{
HSSFCell cell = row.getCell(k);
if(null==cell)continue;
//System.out.print("" + k + " ");
//System.out.print("type:"+cell.getCellType());
switch(cell.getCellType())
{
caseHSSFCell.CELL_TYPE_NUMERIC:// 数字
System.out.print(cell.getNumericCellValue()
+" ");
break;
caseHSSFCell.CELL_TYPE_STRING:// 字符串
System.out.print(cell.getStringCellValue()
+" ");
break;
caseHSSFCell.CELL_TYPE_BOOLEAN:// Boolean
System.out.println(cell.getBooleanCellValue()
+" ");
break;
caseHSSFCell.CELL_TYPE_FORMULA:// 公式
System.out.print(cell.getCellFormula() +" ");
break;
caseHSSFCell.CELL_TYPE_BLANK:// 空值
System.out.println(" ");
break;
caseHSSFCell.CELL_TYPE_ERROR:// 故障
System.out.println(" ");
break;
default:
System.out.print("未知类型 ");
break;
}
}
System.out.print("\n");
}
}
}
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