目前,比較常用的實現Java導入、導出Excel的技術有兩種Jakarta POI和Java Excel
直接上代碼:
一,POI
POI是apache的項目,可對微軟的Word,Excel,Ppt進行操作,包括office2003和2007,Excl2003和2007。poi現在一直有更新。所以現在主流使用POI。
xls:
pom:
org.apache.poi
poi-ooxml
3.9
commons-io
commons-io
2.2
導出:
public class PoiCreateExcel {
public static void main(String[] args) {
// 創建表頭
String[] title = {"id","name","sex"};
//創建Excel工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
//創建一個工作表sheet
HSSFSheet sheet = workbook.createSheet();
//創建第一行
HSSFRow row = sheet.createRow(0);
HSSFCell cell = null;
// 插入第一行
for (int i = 0; i < title.length; i++) {
cell = row.createCell(i);
cell.setCellValue(title[i]);
}
// 追加數據
for (int i = 1; i < 10; i++) {// 這裏的int 起始是1 也就是第二行開始
HSSFRow nexTrow = sheet.createRow(i);
HSSFCell cell2 = nexTrow.createCell(0);
cell2.setCellValue("a"+i);
cell2 = nexTrow.createCell(1);
cell2.setCellValue("user");
cell2 = nexTrow.createCell(2);
cell2.setCellValue("男");
}
// 創建一個文件
File file = new File("d:/poi.xls");
try {
file.createNewFile();
// 將內容存盤
FileOutputStream stream = FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
導入:
public class PoiReadExcel {
public static void main(String[] args) {
// 引入需要解析的文件
File file = new File("d:/poi.xls");
try {
// 創建Excel 讀取文件內容
HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file));
/**
- 第一種方式讀取Sheet頁
*/
// HSSFSheet sheet = workbook.getSheet("Sheet0");
/**
- 第二種方式讀取Sheet頁
*/
HSSFSheet sheet = workbook.getSheetAt(0);
int firstRowNum = 0;// 起始行第0行
int lasrRowNum = sheet.getLastRowNum();// 一直讀到最後一行
for (int i = 0; i < lasrRowNum; i++) {
HSSFRow row = sheet.getRow(i);
// 獲取當前最後單元格列號
int lastCellNum = row.getLastCellNum();
for (int j = 0; j < lastCellNum; j++) {
HSSFCell cell = row.getCell(j);
String value = cell.getStringCellValue();// 注意! 如果Excel 裏面的值是String 那麼getStringCellValue 如果是其他類型 則需要修改
System.out.print(value + " ");
}
System.out.println();
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
xlsx:
pom:
org.apache.poi
poi-examples
3.9
org.apache.poi
poi-excelant
3.9
org.apache.poi
poi-ooxml
3.9
org.apache.poi
poi-ooxml-schemas
3.9
org.apache.poi
poi-scratchpad
3.9
導出:
public class PoiCreateExcel {
public static void main(String[] args) {
// 創建表頭
String[] title = {"id","name","sex"};
//創建Excel工作薄
XSSFWorkbook workbook = new XSSFWorkbook();
//創建一個工作表shheet
Sheet sheet = workbook.createSheet();
//創建第一行
Row row = sheet.createRow(0);
Cell cell = null;
// 插入第一行
for (int i = 0; i < title.length; i++) {
cell = row.createCell(i);
cell.setCellValue(title[i]);
}
// 追加數據
for (int i = 1; i < 10; i++) {// 這裏的int 起始是1 也就是第二行開始
Row nexTrow = sheet.createRow(i);
Cell cell2 = nexTrow.createCell(0);
cell2.setCellValue("a"+i);
cell2 = nexTrow.createCell(1);
cell2.setCellValue("user");
cell2 = nexTrow.createCell(2);
cell2.setCellValue("男");
}
// 創建一個文件亨達全球
File file = new File("d:/poi.xlsx");// 這裏可以修改成高版本的
try {
file.createNewFile();
// 將內容存盤
FileOutputStream stream = FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
導入:
public class PoiReadExcel {
public List readExcels(InputStream is)throws Exception{
List xlsxList = new ArrayList();
try {
if(is ==null){
throw new IOException("文件不正確!");
}
Workbook workbook = WorkbookFactory.create(is);
FormulaEvaluator fe = workbook.getCreationHelper().createFormulaEvaluator();
//獲取第一張表
Sheet sheet = workbook.getSheetAt(0);
if(sheet == null){
throw new IOException("傳入的excel的第一張表爲空!");
}
for(int rowNum = 0;rowNum <= sheet.getLastRowNum(); rowNum++){
Row row = sheet.getRow(rowNum);
if(row != null){
//獲得當前行的開始列
int firstCellNum = row.getFirstCellNum();
//獲得當前行的列數
int lastCellNum = row.getPhysicalNumberOfCells();
String result = "";
//循環當前行
for(int cellNum = firstCellNum; cellNum < lastCellNum;cellNum++){
Cell cell = row.getCell(cellNum);
double value = 0;
String valueString = cell.getStringCellValue();
if(null!=fe.evaluate(cell)){
value = fe.evaluate(cell).getNumberValue();
}
//result = result + cellNum + ":"+value + "----";
result = result + cellNum + ":"+valueString + "----";
}
System.out.println(result + " ");
}
}
is.close();
} catch (FileNotFoundException e) {
throw new Exception("文件不正確!");
}
return xlsxList;
}
public static void main(String[] args) throws Exception {
InputStream is = new FileInputStream("d:/poi.xlsx");
PoiReadExcel re = new PoiReadExcel();
re.readExcels(is);
}
}
二,JXL
JXL只能對Excel進行操作,屬於比較老的框架,它只支持到Excel 95-2000的版本。現在已經停止更新和維護。
pom:
net.sourceforge.jexcelapi
jxl
2.6.10
導出:
public class JxlCreateExcel {
public static void main(String[] args) {
// 首先設置表格第一行 表格頭名稱 也就是列名
String [] title = {"id","name","sex"};
// 創建Excel文件 存入路徑
File file = new File("d:/jxl.xls");
try {
file.createNewFile();
// 創建工作薄
WritableWorkbook workbook = Workbook.createWorkbook(file);
// 創建sheet
WritableSheet sheet = workbook.createSheet("sheet1",0);
// 添加數據
Label label = null;
// 第一行設置列名
for (int i = 0; i < title.length; i++) {
label = new Label(i,0,title[i]);
sheet.addCell(label);
}
// 追加數據 從第二行開始 i從1開始
for (int i = 1; i < 9; i++) {
label = new Label(0,i,"id:"+i);
sheet.addCell(label);
label = new Label(1,i,"user");
sheet.addCell(label);
label = new Label(2,i,"男");
sheet.addCell(label);
}
// 寫入 並在最後關閉流
workbook.write();
workbook.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
導入:
public class JxlReadExcel {
public static void main(String[] args) {
try {
// 創建 Workbook
Workbook workbook = Workbook.getWorkbook(new File("d:/jxl.xls"));
// 獲取工作表sheet
Sheet sheet = workbook.getSheet(0);
// 獲取數據
for (int i = 0; i < sheet.getRows(); i++) {// 獲取行
for (int j = 0; j < sheet.getColumns(); j++) {// 獲取列
Cell cell = sheet.getCell(j,i);
System.out.print(cell.getContents() + " ");// 得到單元格的內容
}
System.out.println();
}
workbook.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}