excel 导出

package com.euc.qy.sn.util;


import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern;


import javax.swing.JOptionPane;


import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFComment;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
import org.apache.poi.hssf.usermodel.HSSFRichTextString;
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 com.artery.util.GeneralUtility;


public class ExportExcel {
HSSFWorkbook workbook = new HSSFWorkbook();
String[] headers;
Collection<Object[]> dataset;
int headerRows = 1;
public ExportExcel() {

}
public void exportExcelHeader(HSSFSheet sheet) {
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth( 15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.SKY_BLUE.index);
style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style.setBorderRight(HSSFCellStyle.BORDER_THIN);
style.setBorderTop(HSSFCellStyle.BORDER_THIN);
style.setAlignment(HSSFCellStyle.ALIGN_CENTER);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);

// 产生表格标题行
HSSFRow row = sheet.createRow(0);
for (int i = 0; i < headers.length; i++) {
row.createCell(i, HSSFCell.CELL_TYPE_STRING);
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
HSSFRichTextString text = new HSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
headerRows = 1;


}

public void exportExcelBody(HSSFSheet sheet) {

// 生成并设置另一个样式
HSSFCellStyle style2 = workbook.createCellStyle();
style2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);
style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);
style2.setBorderRight(HSSFCellStyle.BORDER_THIN);
style2.setBorderTop(HSSFCellStyle.BORDER_THIN);
style2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);


// 声明一个画图的顶级管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
comment.setAuthor("leno");


// 产生表格标题行


// 遍历集合数据，产生数据行
Iterator<Object[]> it = dataset.iterator();
int index = headerRows;
while (it.hasNext()) {
HSSFRow row = sheet.createRow(index++);
Object[] t = it.next();
// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
for (int i = 0; i < t.length; i++) {
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
Object value = t[i];
if (value == null) {
value = "";
}
try {


// 判断值的类型后进行强制类型转换
String textValue = null;

if (value instanceof Boolean) {
boolean bValue = (Boolean) value;
textValue = "有";
if (!bValue) {
textValue = "无";
}
} else if (value instanceof Date) {
Date date = (Date) value;
textValue =。。。。。。。。。。。。。;
} else if (value instanceof byte[]) {
// 有图片时，设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0, 1023, 255, (short) 6, index, (short) 6, index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook.addPicture(bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
} else {
// 其它数据类型都当作字符串简单处理
textValue = value.toString();
}
// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
if (textValue != null) {
Pattern p = Pattern.compile("^//d+(//.//d+)?$");
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
} else {
HSSFRichTextString richString = new HSSFRichTextString(textValue);
HSSFFont font3 = workbook.createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
} catch (SecurityException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} finally {
// 清理资源
}
}
}
}



public void exportExcel(String title, String[] headers, Collection<Object[]> dataset, OutputStream out) {
// 声明一个工作薄
workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth( 15);
this.headers = headers;
this.dataset = dataset;
exportExcelHeader(sheet);
exportExcelBody(sheet);
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
}
}


public static void main(String[] args) {
// 测试学生
ExportExcel ex = new ExportExcel();
String[] headers = { "学号", "姓名", "年龄", "性别", "出生日期" };
List<Object[]> dataset = new ArrayList<Object[]>();
dataset.add(new Object[]{10000001, "张三", 20, true, new java.util.Date()});
dataset.add(new Object[]{20000002, "李四", 24, false, new Date()});
dataset.add(new Object[]{30000003, "王五", 22, true, new Date()});

try {



OutputStream out = new FileOutputStream("E://a.xls");
ex.exportExcel("学生表格",headers, dataset, out);
out.close();
JOptionPane.showMessageDialog(null, "导出成功!");
System.out.println("excel导出成功！");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}