1、工具准备

(1)下载poi.jar

(2)eclipse

2、Excel准备

3、代码示例

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

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;

//操作Excel工具类

public class ExcelUtils {

public static HSSFSheet ExcelSheet;

public static HSSFWorkbookExcelBook;

public static HSSFRow Row;

public static HSSFCellCell;

/**

* 加载Excel

* @param Path

* 文件路径

*/

public static void setExcelFile(String Path) {

FileInputStream ExcelFile;

try {

ExcelFile = new FileInputStream(Path);

ExcelBook=new HSSFWorkbook(ExcelFile);

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

/**

* 值得写入

* @param Result

* @param RowNum

* @param ColNum

* @param Path

* @param SheetName

*/

public static void setCellData(String Result, int RowNum, int ColNum,String Path,String SheetName) {

try {

ExcelSheet=ExcelBook.getSheet(SheetName);

Row = ExcelSheet.getRow(RowNum);

Cell = Row.getCell(ColNum, Row.RETURN_BLANK_AS_NULL);

if (Cell == null) {

Cell = Row.createCell(ColNum);

Cell.setCellValue(Result);

} else {

Cell.setCellValue(Result);

}

FileOutputStream fileOut = new FileOutputStream(Path);

ExcelBook.write(fileOut);

fileOut.flush();

fileOut.close();

} catch (Exception e) {

e.printStackTrace();

}

}

/**

* 获取Excel中对应单元格的值

* @param RowNum

* @param CloNum

* @param SheetName

* @return

*/

public static String getCellDate(int RowNum,int CloNum,String SheetName){

ExcelSheet=ExcelBook.getSheet(SheetName);

Cell=ExcelSheet.getRow(RowNum).getCell(CloNum);

String cellData=Cell.getStringCellValue();

return cellData;

}

/**

* 获取到sheet页最后一行

* @param SheetName

* @return

*/

public static int getLastRowNums(String SheetName) {

try {

ExcelSheet=ExcelBook.getSheet(SheetName);

int rowCount = ExcelSheet.getLastRowNum();

return rowCount;

}catch (Exception e){

throw(e);

}

}

}