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：
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package com.shuai.hello;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
public class ReadExcel {
public static void main(String[] args) throws IOException {
//File file = new File("C:/Users.xlsx");
InputStream stream = new FileInputStream("C:/Users.xlsx");
XSSFWorkbook xssfWorkbook = new XSSFWorkbook(stream);
XSSFSheet xssfSheet = xssfWorkbook.getSheetAt(0);
int rowstart = xssfSheet.getFirstRowNum();
int rowEnd = xssfSheet.getLastRowNum();
for(int i=rowstart;i<=rowEnd;i++)
{
XSSFRow row = xssfSheet.getRow(i);
if(null == row) continue;
int cellStart = row.getFirstCellNum();
int cellEnd = row.getLastCellNum();
for(int k=cellStart;k<=cellEnd;k++)
{
XSSFCell cell = row.getCell(k);
if(null==cell) continue;
switch (cell.getCellType())
{
case HSSFCell.CELL_TYPE_NUMERIC: // 数字
System.out.print(cell.getNumericCellValue()
+ "\t");
break;
case HSSFCell.CELL_TYPE_STRING: // 字符串
System.out.print(cell.getStringCellValue()
+ "\t");
break;
case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
System.out.println(cell.getBooleanCellValue()
+ "\t");
break;
case HSSFCell.CELL_TYPE_FORMULA: // 公式
System.out.print(cell.getCellFormula() + "\t");
break;
case HSSFCell.CELL_TYPE_BLANK: // 空值
System.out.println(" ");
break;
case HSSFCell.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");
}*/
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2.解析后缀为.xls的EXCEL文件：
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package com.shuai.hello;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import org.apache.poi.hssf.usermodel.HSSFCell;
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;
public class ReadXls {
public static void main(String[] args) throws IOException, IOException {
File file = new File("C:/Users/dengta/Desktop/ok1.xls");
POIFSFileSystem poifsFileSystem = new POIFSFileSystem(new FileInputStream(file));
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(poifsFileSystem);
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(0);
int rowstart = hssfSheet.getFirstRowNum();
int rowEnd = hssfSheet.getLastRowNum();
for(int i=rowstart;i<=rowEnd;i++)
{
HSSFRow row = hssfSheet.getRow(i);
if(null == row) continue;
int cellStart = row.getFirstCellNum();
int cellEnd = row.getLastCellNum();
for(int k=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())
{
case HSSFCell.CELL_TYPE_NUMERIC: // 数字
System.out.print(cell.getNumericCellValue()
+ " ");
break;
case HSSFCell.CELL_TYPE_STRING: // 字符串
System.out.print(cell.getStringCellValue()
+ " ");
break;
case HSSFCell.CELL_TYPE_BOOLEAN: // Boolean
System.out.println(cell.getBooleanCellValue()
+ " ");
break;
case HSSFCell.CELL_TYPE_FORMULA: // 公式
System.out.print(cell.getCellFormula() + " ");
break;
case HSSFCell.CELL_TYPE_BLANK: // 空值
System.out.println(" ");
break;
case HSSFCell.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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原文链接：http://blog.csdn.net/wanghjbuf/article/details/54809134?locationNum=4&fps=1