导出数据到excel工具类

import java.io.BufferedInputStream;

import java.io.FileInputStream;

import java.io.FileNotFoundException;

import java.io.FileOutputStream;

import java.io.IOException;

import java.io.OutputStream;

import java.lang.reflect.Field;

import java.text.SimpleDateFormat;

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.servlet.http.HttpServletResponse;

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;

/**

* <p>Title:ExportExcel.java</p>

* <p>Description:数字校园系统</p>

* <p>Copyright: Copyright (c) 2010-2015</p>

* <p>Company: XXXXXX科技有限公司</p>

* @Function 功能描述：利用开源组件POI3.0.2动态导出EXCEL文档 转载时请保留以下信息

* @Author XXXX

* @Version 1.0

* @Date 2014年8月7日

*/

public class ExportExcel<T> {

public void exportExcel(Collection<T> dataset, OutputStream out) {

exportExcel("数字校园导出Excel文档", null, null, dataset, out, "yyyy-MM-dd");

}

public void exportExcel(String[] headers, Collection<T> dataset,

String[] columns, OutputStream out) {

exportExcel("数字校园导出Excel文档", headers, columns, dataset, out,

"yyyy-MM-dd");

}

public void exportExcel(String[] headers, Collection<T> dataset,

OutputStream out, String pattern) {

exportExcel("数字校园导出Excel文档", headers, null, dataset, out, pattern);

}

/**

* 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上

*

* @param title

* 表格标题名

* @param headers

* 表格属性列名数组

* @param dataset

* 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的

* javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)

* @param out

* 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中

* @param pattern

* 如果有时间数据，设定输出格式。默认为"yyy-MM-dd"

*/

@SuppressWarnings({ "unchecked", "deprecation" })

public void exportExcel(String title, String[] headers, String[] columns,

Collection<T> dataset, OutputStream out, String pattern) {

// 声明一个工作薄

HSSFWorkbook 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((short) 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);

// 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("数字校园");

// 产生表格标题行

HSSFRow row = sheet.createRow(0);

for (short i = 0; i < headers.length; i++) {

HSSFCell cell = row.createCell(i);

cell.setCellStyle(style);

HSSFRichTextString text = new HSSFRichTextString(headers[i]);

cell.setCellValue(text);

}

// 遍历集合数据，产生数据行

Iterator<T> it = dataset.iterator();

int index = 0;

while (it.hasNext()) {

index++;

row = sheet.createRow(index);

T t = (T) it.next();

//指定了输出属性

if (columns != null) {

for (int i = 0; i < columns.length; i++) {

setCellValue(t, columns[i], pattern, row, sheet, i, index,

patriarch, workbook, style2);

}

} else {

//未指定输出属性，则输出全部属性

// 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

Field[] fields = t.getClass().getDeclaredFields();

for (short i = 0; i < fields.length; i++) {

Field field = fields[i];

String fieldName = field.getName();

setCellValue(t, fieldName, pattern, row, sheet, i, index,

patriarch, workbook, style2);

}

}

}

try {

workbook.write(out);

} catch (IOException e) {

e.printStackTrace();

}

}

private void setCellValue(T t, String fieldName, String pattern,

HSSFRow row, HSSFSheet sheet, int i, int index,

HSSFPatriarch patriarch, HSSFWorkbook workbook, HSSFCellStyle style2) {

HSSFCell cell = row.createCell(i);

cell.setCellStyle(style2);

Object value = MyBeanUtils.getFieldValue(t, fieldName);

// 判断值的类型后进行强制类型转换

String textValue = null;

// if (value instanceof Integer) {

// int intValue = (Integer) value;

// cell.setCellValue(intValue);

// } else if (value instanceof Float) {

// float fValue = (Float) value;

// textValue = new HSSFRichTextString(

// String.valueOf(fValue));

// cell.setCellValue(textValue);

// } else if (value instanceof Double) {

// double dValue = (Double) value;

// textValue = new HSSFRichTextString(

// String.valueOf(dValue));

// cell.setCellValue(textValue);

// } else if (value instanceof Long) {

// long longValue = (Long) value;

// cell.setCellValue(longValue);

// }

if (value instanceof Boolean) {

boolean bValue = (Boolean) value;

textValue = "男";

if (!bValue) {

textValue = "女";

}

} else if (value instanceof Date) {

Date date = (Date) value;

SimpleDateFormat sdf = new SimpleDateFormat(pattern);

textValue = sdf.format(date);

} 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 != null ? 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);

}

}

}

@SuppressWarnings("unchecked")

public void exportExcel2web(HttpServletResponse response, List<T> dataset,

String[] headers, String[] columns, String realName) {

response.setContentType("octets/stream");

if (realName == null) {

realName = "数字校园数据导出.xls";

}

try {

response.addHeader("Content-Disposition", "attachment;filename="

+ new String(realName.getBytes("utf-8"), "ISO8859-1"));

OutputStream out = response.getOutputStream();

this.exportExcel(headers, dataset, columns, out);

out.close();

System.out.println("excel导出成功！");

} catch (FileNotFoundException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

} finally {

}

}

public static void main(String[] args) {

// 测试学生

ExportExcel<Student> ex = new ExportExcel<Student>();

String[] headers = { "学号", "姓名", "年龄", "性别", "出生日期" };

List<Student> dataset = new ArrayList<Student>();

dataset.add(new Student(10000001, "张三", 20, true, new Date()));

dataset.add(new Student(20000002, "李四", 24, false, new Date()));

dataset.add(new Student(30000003, "王五", 22, true, new Date()));

// 测试图书

ExportExcel<Book> ex2 = new ExportExcel<Book>();

String[] headers2 = { "图书编号", "图书名称", "图书作者", "图书价格", "图书ISBN",

"图书出版社", "封面图片" };

List<Book> dataset2 = new ArrayList<Book>();

try {

BufferedInputStream bis = new BufferedInputStream(

new FileInputStream("F:\\book.jpg"));

// BufferedInputStream bis = new BufferedInputStream(new

// FileInputStream(new File("/")));

byte[] buf = new byte[bis.available()];

while ((bis.read(buf)) != -1) {

//

}

dataset2.add(new Book(1, "jsp", "leno", 300.33f, "1234567",

"清华出版社", buf));

dataset2.add(new Book(2, "java编程思想", "brucl", 300.33f, "1234567",

"阳光出版社", buf));

dataset2.add(new Book(3, "DOM艺术", "lenotang", 300.33f, "1234567",

"清华出版社", buf));

dataset2.add(new Book(4, "c++经典", "leno", 400.33f, "1234567",

"清华出版社", buf));

dataset2.add(new Book(5, "c#入门", "leno", 300.33f, "1234567",

"汤春秀出版社", buf));

OutputStream out = new FileOutputStream("E://a.xls");

OutputStream out2 = new FileOutputStream("E://b.xls");

ex.exportExcel(headers, dataset, null, out);

ex2.exportExcel(headers2, dataset2, null, out2);

out.close();

JOptionPane.showMessageDialog(null, "导出成功!");

System.out.println("excel导出成功！");

} catch (FileNotFoundException e) {

// TODO Auto-generated catch block

e.printStackTrace();

} catch (IOException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

}

class Student {

private long id;

private String name;

private int age;

private boolean sex;

private Date birthday;

public Student() {

super();

// TODO Auto-generated constructor stub

}

public Student(long id, String name, int age, boolean sex, Date birthday) {

super();

this.id = id;

this.name = name;

this.age = age;

this.sex = sex;

this.birthday = birthday;

}

public long getId() {

return id;

}

public void setId(long id) {

this.id = id;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

public boolean getSex() {

return sex;

}

public void setSex(boolean sex) {

this.sex = sex;

}

public Date getBirthday() {

return birthday;

}

public void setBirthday(Date birthday) {

this.birthday = birthday;

}

}

class Book {

private int bookId;

private String name;

private String author;

private float price;

private String isbn;

private String pubName;

private byte[] preface;

public Book() {

super();

}

public Book(int bookId, String name, String author, float price,

String isbn, String pubName, byte[] preface) {

super();

this.bookId = bookId;

this.name = name;

this.author = author;

this.price = price;

this.isbn = isbn;

this.pubName = pubName;

this.preface = preface;

}

public int getBookId() {

return bookId;

}

public void setBookId(int bookId) {

this.bookId = bookId;

}

public String getName() {

return name;

}

public void setName(String name) {

this.name = name;

}

public String getAuthor() {

return author;

}

public void setAuthor(String author) {

this.author = author;

}

public float getPrice() {

return price;

}

public void setPrice(float price) {

this.price = price;

}

public String getIsbn() {

return isbn;

}

public void setIsbn(String isbn) {

this.isbn = isbn;

}

public String getPubName() {

return pubName;

}

public void setPubName(String pubName) {

this.pubName = pubName;

}

public byte[] getPreface() {

return preface;

}

public void setPreface(byte[] preface) {

this.preface = preface;

}

}