Java讀寫Excel

工作中經常需要對Excel進行讀寫操作，java操作excel文件比較流行的是apache poi包，excel分為xls(2003)和xlsx(2007)兩種格式，操作這兩種格式的excel需要不同的poi包。

xls格式

org.apache.poi

poi

3.11-beta1

xlsx格式

org.apache.poi

poi-ooxml

3.11-beta1

讀xls

File file = new File("src/test/resources/test.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: // 數字

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("未知類型 ");

break;

}

}

System.out.print("\n");

}

讀xlsx

File file = new File("src/test/resources/test.xlsx");

XSSFWorkbook xssfWorkbook = new XSSFWorkbook(file);

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: // 數字

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("未知類型 ");

break;

}

}

System.out.print("\n");

}

寫xls

HSSFWorkbook workbook = null;

workbook = new HSSFWorkbook();

//獲取參數個數作為excel列數

int columeCount = 6;

//獲取List size作為excel行數

int rowCount = 20;

HSSFSheet sheet = workbook.createSheet("sheet name");

//創建第一欄

HSSFRow headRow = sheet.createRow(0);

String[] titleArray = {"id", "name", "age", "email", "address", "phone"};

for(int m=0;m<=columeCount-1;m++)

{

HSSFCell cell = headRow.createCell(m);

cell.setCellType(HSSFCell.CELL_TYPE_STRING);

sheet.setColumnWidth(m, 6000);

HSSFCellStyle style = workbook.createCellStyle();

HSSFFont font = workbook.createFont();

font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);

short color = HSSFColor.RED.index;

font.setColor(color);

style.setFont(font);

//填寫數據

cell.setCellStyle(style);

cell.setCellValue(titleArray[m]);

}

int index = 0;

//寫入數據

for(RowEntity entity : pRowEntityList)

{

//logger.info("寫入一行");

HSSFRow row = sheet.createRow(index+1);

for(int n=0;n<=columeCount-1;n++)

row.createCell(n);

row.getCell(0).setCellValue(entity.getId());

row.getCell(1).setCellValue(entity.getName());

row.getCell(2).setCellValue(entity.getAge());

row.getCell(3).setCellValue(entity.getEmail());

row.getCell(4).setCellValue(entity.getAddress());

row.getCell(5).setCellValue(entity.getPhone());

index++;

}

//寫到磁盤上

try {

FileOutputStream fileOutputStream = new FileOutputStream(new File(path));

workbook.write(fileOutputStream);

fileOutputStream.close();

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

寫xlsx

和寫xls類似，使用2007對應的對象即可。

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