目前,比较常用的实现Java导入、导出Excel的技术有两种Jakarta POI和Java Excel
直接上代码:
一,POI
POI是apache的项目,可对微软的Word,Excel,Ppt进行操作,包括office2003和2007,Excl2003和2007。poi现在一直有更新。所以现在主流使用POI。
xls:
pom:
org.apache.poi
poi-ooxml
3.9
commons-io
commons-io
2.2
导出:
public class PoiCreateExcel {
public static void main(String[] args) {
// 创建表头
String[] title = {"id","name","sex"};
//创建Excel工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
//创建一个工作表sheet
HSSFSheet sheet = workbook.createSheet();
//创建第一行
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]);
}
// 追加数据
for (int i = 1; i < 10; i++) {// 这里的int 起始是1 也就是第二行开始
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");
}
// 创建一个文件
File file = new File("d:/poi.xls");
try {
file.createNewFile();
// 将内容存盘
FileOutputStream stream = FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
导入:
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 {
// 创建Excel 读取文件内容
HSSFWorkbook workbook = new HSSFWorkbook(FileUtils.openInputStream(file));
/**
* 第一种方式读取Sheet页
*/
// HSSFSheet sheet = workbook.getSheet("Sheet0");
/**
* 第二种方式读取Sheet页
*/
HSSFSheet sheet = workbook.getSheetAt(0);
int firstRowNum = 0;// 起始行第0行
int lasrRowNum = sheet.getLastRowNum();// 一直读到最后一行
for (int i = 0; i < lasrRowNum; i++) {
HSSFRow row = sheet.getRow(i);
// 获取当前最后单元格列号
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 里面的值是String 那么getStringCellValue 如果是其他类型 则需要修改
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
导出:
public class PoiCreateExcel {
public static void main(String[] args) {
// 创建表头
String[] title = {"id","name","sex"};
//创建Excel工作薄
XSSFWorkbook workbook = new XSSFWorkbook();
//创建一个工作表shheet
Sheet sheet = workbook.createSheet();
//创建第一行
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]);
}
// 追加数据
for (int i = 1; i < 10; i++) {// 这里的int 起始是1 也就是第二行开始
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");
}
// 创建一个文件
File file = new File("d:/poi.xlsx");// 这里可以修改成高版本的
try {
file.createNewFile();
// 将内容内盘外汇赠金活动
FileOutputStream stream = FileUtils.openOutputStream(file);
workbook.write(stream);
stream.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
导入:
public class PoiReadExcel {
public List readExcels(InputStream is)throws Exception{
List xlsxList = new ArrayList();
try {
if(is ==null){
throw new IOException("文件不正确!");
}
Workbook workbook = WorkbookFactory.create(is);
FormulaEvaluator fe = workbook.getCreationHelper().createFormulaEvaluator();
//获取第一张表
Sheet sheet = workbook.getSheetAt(0);
if(sheet == null){
throw new IOException("传入的excel的第一张表为空!");
}
for(int rowNum = 0;rowNum <= sheet.getLastRowNum(); rowNum++){
Row row = sheet.getRow(rowNum);
if(row != null){
//获得当前行的开始列
int firstCellNum = row.getFirstCellNum();
//获得当前行的列数
int lastCellNum = row.getPhysicalNumberOfCells();
String result = "";
//循环当前行
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("文件不正确!");
}
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只能对Excel进行操作,属于比较老的框架,它只支持到Excel 95-2000的版本。现在已经停止更新和维护。
pom:
net.sourceforge.jexcelapi
jxl
2.6.10
导出:
public class JxlCreateExcel {
public static void main(String[] args) {
// 首先设置表格第一行 表格头名称 也就是列名
String [] title = {"id","name","sex"};
// 创建Excel文件 存入路径
File file = new File("d:/jxl.xls");
try {
file.createNewFile();
// 创建工作薄
WritableWorkbook workbook = Workbook.createWorkbook(file);
// 创建sheet
WritableSheet sheet = workbook.createSheet("sheet1",0);
// 添加数据
Label label = null;
// 第一行设置列名
for (int i = 0; i < title.length; i++) {
label = new Label(i,0,title[i]);
sheet.addCell(label);
}
// 追加数据 从第二行开始 i从1开始
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);
}
// 写入 并在最后关闭流
workbook.write();
workbook.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
导入:
public class JxlReadExcel {
public static void main(String[] args) {
try {
// 创建 Workbook
Workbook workbook = Workbook.getWorkbook(new File("d:/jxl.xls"));
// 获取工作表sheet
Sheet sheet = workbook.getSheet(0);
// 获取数据
for (int i = 0; i < sheet.getRows(); i++) {// 获取行
for (int j = 0; j < sheet.getColumns(); j++) {// 获取列
Cell cell = sheet.getCell(j,i);
System.out.print(cell.getContents() + " ");// 得到单元格的内容
}
System.out.println();
}
workbook.close();
} catch (Exception e) {
e.printStackTrace();
}
}
}
原文地址:https://www.cnblogs.com/benming/p/12558006.html