首先需要准备需要用到的jar包:
POI的jar包
POI依赖的jar包
创建xlsx需要用到的xmlBeans的jar包及依赖包
所有的jar在POI的项目的包中都能找到，即把POI中所有的jar包导入即可。
The Apache POI Project的下载地址: http://poi.apache.org/download.html
package com.dzy.poi;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.text.DecimalFormat;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.LinkedList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFDataFormat;
import org.apache.poi.hssf.usermodel.HSSFDateUtil;
import org.apache.poi.hssf.usermodel.HSSFFont;
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.hssf.util.HSSFColor;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;
/**
* 可以从http://poi.apache.org/ 这里下载到POI的jar包 POI
创建和读取2003-2007版本Excel文件
*
*/
public class CreatAndReadExcel {
public static void main(String[] args) throws Exception {
creat2003Excel();// 创建2007版Excel文件
creat2007Excel();// 创建2003版Excel文件
//读取2003Excel文件
String path2003 = System.getProperty("user.dir")
+ System.getProperty("file.separator") + "style_2003.xls";// 获取项目文件路径 +2003版文件名
System.out.println("路径：" + path2003);
File f2003 = new File(path2003);
try {
readExcel(f2003);
} catch (IOException e) {
e.printStackTrace();
}
//读取2007Excel文件
String path2007 = System.getProperty("user.dir")
+ System.getProperty("file.separator") + "style_2007.xlsx";// 获取项目文件路径 +2007版文件名
System.out.println("路径：" + path2007);
File f2007 = new File(path2007);
try {
readExcel(f2007);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
/**
* 创建2007版Excel文件
*
* @throws FileNotFoundException
* @throws IOException
*/
private static void creat2007Excel() throws FileNotFoundException,
IOException {
// HSSFWorkbook workBook = new HSSFWorkbook();// 创建 一个excel文档对象
XSSFWorkbook workBook = new XSSFWorkbook();
XSSFSheet sheet = workBook.createSheet();// 创建一个工作薄对象
sheet.setColumnWidth(1, 10000);// 设置第二列的宽度为
XSSFRow row = sheet.createRow(1);// 创建一个行对象
row.setHeightInPoints(23);// 设置行高23像素
XSSFCellStyle style = workBook.createCellStyle();// 创建样式对象
// 设置字体
XSSFFont font = workBook.createFont();// 创建字体对象
font.setFontHeightInPoints((short) 15);// 设置字体大小
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 设置粗体
font.setFontName("黑体");// 设置为黑体字
style.setFont(font);// 将字体加入到样式对象
// 设置对齐方式
style.setAlignment(HSSFCellStyle.ALIGN_CENTER_SELECTION);// 水平居中
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直居中
// 设置边框
style.setBorderTop(HSSFCellStyle.BORDER_THICK);// 顶部边框粗线
style.setTopBorderColor(HSSFColor.RED.index);// 设置为红色
style.setBorderBottom(HSSFCellStyle.BORDER_DOUBLE);// 底部边框双线
style.setBorderLeft(HSSFCellStyle.BORDER_MEDIUM);// 左边边框
style.setBorderRight(HSSFCellStyle.BORDER_MEDIUM);// 右边边框
// 格式化日期
style.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));
XSSFCell cell = row.createCell(1);// 创建单元格
cell.setCellValue(new Date());// 写入当前日期
cell.setCellStyle(style);// 应用样式对象
// 文件输出流
FileOutputStream os = new FileOutputStream("style_2007.xlsx");
workBook.write(os);// 将文档对象写入文件输出流
os.close();// 关闭文件输出流
System.out.println("创建成功 office 2007 excel");
}
/**
* 创建2003版本的Excel文件
*/
private static void creat2003Excel() throws FileNotFoundException,
IOException {
HSSFWorkbook workBook = new HSSFWorkbook();// 创建 一个excel文档对象
HSSFSheet sheet = workBook.createSheet();// 创建一个工作薄对象
sheet.setColumnWidth(1, 10000);// 设置第二列的宽度为
HSSFRow row = sheet.createRow(1);// 创建一个行对象
row.setHeightInPoints(23);// 设置行高23像素
HSSFCellStyle style = workBook.createCellStyle();// 创建样式对象
// 设置字体
HSSFFont font = workBook.createFont();// 创建字体对象
font.setFontHeightInPoints((short) 15);// 设置字体大小
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);// 设置粗体
font.setFontName("黑体");// 设置为黑体字
style.setFont(font);// 将字体加入到样式对象
// 设置对齐方式
style.setAlignment(HSSFCellStyle.ALIGN_CENTER_SELECTION);// 水平居中
style.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 垂直居中
// 设置边框
style.setBorderTop(HSSFCellStyle.BORDER_THICK);// 顶部边框粗线
style.setTopBorderColor(HSSFColor.RED.index);// 设置为红色
style.setBorderBottom(HSSFCellStyle.BORDER_DOUBLE);// 底部边框双线
style.setBorderLeft(HSSFCellStyle.BORDER_MEDIUM);// 左边边框
style.setBorderRight(HSSFCellStyle.BORDER_MEDIUM);// 右边边框
// 格式化日期
style.setDataFormat(HSSFDataFormat.getBuiltinFormat("m/d/yy h:mm"));
HSSFCell cell = row.createCell(1);// 创建单元格
cell.setCellValue(new Date());// 写入当前日期
cell.setCellStyle(style);// 应用样式对象
// 文件输出流
FileOutputStream os = new FileOutputStream("style_2003.xls");
workBook.write(os);// 将文档对象写入文件输出流
os.close();// 关闭文件输出流
System.out.println("创建成功 office 2003 excel");
}
/**
* 对外提供读取excel 的方法
*/
public static List<List<Object>> readExcel(File file) throws IOException {
String fileName = file.getName();
String extension = fileName.lastIndexOf(".") == -1 ? "" : fileName
.substring(fileName.lastIndexOf(".") + 1);
if ("xls".equals(extension)) {
return read2003Excel(file);
} else if ("xlsx".equals(extension)) {
return read2007Excel(file);
} else {
throw new IOException("不支持的文件类型");
}
}
/**
* 读取 office 2003 excel
*
* @throws IOException
* @throws FileNotFoundException
*/
private static List<List<Object>> read2003Excel(File file)
throws IOException {
List<List<Object>> list = new LinkedList<List<Object>>();
HSSFWorkbook hwb = new HSSFWorkbook(new FileInputStream(file));
HSSFSheet sheet = hwb.getSheetAt(0);
Object value = null;
HSSFRow row = null;
HSSFCell cell = null;
System.out.println("读取office 2003 excel内容如下：");
for (int i = sheet.getFirstRowNum(); i <= sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
}
List<Object> linked = new LinkedList<Object>();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
continue;
}
DecimalFormat df = new DecimalFormat("0");// 格式化 number String
// 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
// System.out.println(i + "行" + j + " 列 is String type");
value = cell.getStringCellValue();
System.out.print(" " + value + " ");
break;
case XSSFCell.CELL_TYPE_NUMERIC:
// System.out.println(i + "行" + j
// + " 列 is Number type ; DateFormt:"
// + cell.getCellStyle().getDataFormatString());
if ("@".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("General".equals(cell.getCellStyle()
.getDataFormatString())) {
value = nf.format(cell.getNumericCellValue());
} else {
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
}
System.out.print(" " + value + " ");
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
// System.out.println(i + "行" + j + " 列 is Boolean type");
value = cell.getBooleanCellValue();
System.out.print(" " + value + " ");
break;
case XSSFCell.CELL_TYPE_BLANK:
// System.out.println(i + "行" + j + " 列 is Blank type");
value = "";
System.out.print(" " + value + " ");
break;
default:
// System.out.println(i + "行" + j + " 列 is default type");
value = cell.toString();
System.out.print(" " + value + " ");
}
if (value == null || "".equals(value)) {
continue;
}
linked.add(value);
}
System.out.println("");
list.add(linked);
}
return list;
}
/**
* 读取Office 2007 excel
*/
private static List<List<Object>> read2007Excel(File file)
throws IOException {
List<List<Object>> list = new LinkedList<List<Object>>();
// String path = System.getProperty("user.dir") +
// System.getProperty("file.separator")+"dd.xlsx";
// System.out.println("路径："+path);
// 构造 XSSFWorkbook 对象，strPath 传入文件路径
XSSFWorkbook xwb = new XSSFWorkbook(new FileInputStream(file));
// 读取第一章表格内容
XSSFSheet sheet = xwb.getSheetAt(0);
Object value = null;
XSSFRow row = null;
XSSFCell cell = null;
System.out.println("读取office 2007 excel内容如下：");
for (int i = sheet.getFirstRowNum(); i <= sheet
.getPhysicalNumberOfRows(); i++) {
row = sheet.getRow(i);
if (row == null) {
continue;
}
List<Object> linked = new LinkedList<Object>();
for (int j = row.getFirstCellNum(); j <= row.getLastCellNum(); j++) {
cell = row.getCell(j);
if (cell == null) {
continue;
}
DecimalFormat df = new DecimalFormat("0");// 格式化 number String
// 字符
SimpleDateFormat sdf = new SimpleDateFormat(
"yyyy-MM-dd HH:mm:ss");// 格式化日期字符串
DecimalFormat nf = new DecimalFormat("0.00");// 格式化数字
switch (cell.getCellType()) {
case XSSFCell.CELL_TYPE_STRING:
// System.out.println(i + "行" + j + " 列 is String type");
value = cell.getStringCellValue();
System.out.print(" " + value + " ");
break;
case XSSFCell.CELL_TYPE_NUMERIC:
// System.out.println(i + "行" + j
// + " 列 is Number type ; DateFormt:"
// + cell.getCellStyle().getDataFormatString());
if ("@".equals(cell.getCellStyle().getDataFormatString())) {
value = df.format(cell.getNumericCellValue());
} else if ("General".equals(cell.getCellStyle()
.getDataFormatString())) {
value = nf.format(cell.getNumericCellValue());
} else {
value = sdf.format(HSSFDateUtil.getJavaDate(cell
.getNumericCellValue()));
}
System.out.print(" " + value + " ");
break;
case XSSFCell.CELL_TYPE_BOOLEAN:
// System.out.println(i + "行" + j + " 列 is Boolean type");
value = cell.getBooleanCellValue();
System.out.print(" " + value + " ");
break;
case XSSFCell.CELL_TYPE_BLANK:
// System.out.println(i + "行" + j + " 列 is Blank type");
value = "";
// System.out.println(value);
break;
default:
// System.out.println(i + "行" + j + " 列 is default type");
value = cell.toString();
System.out.print(" " + value + " ");
}
if (value == null || "".equals(value)) {
continue;
}
linked.add(value);
}
System.out.println("");
list.add(linked);
}
return list;
}
}