package org.leno.export.util;import java.io.*;
import java.lang.reflect.*;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.text.SimpleDateFormat;
import javax.swing.JOptionPane;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
/** * 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,注明出处! * *@author leno *@version v1.0 *@param <T> * 应用泛型,代表任意一个符合javabean风格的类 * 注意这里为了简单起见,boolean型的属性xxx的get器方式为getXxx(),而不是isXxx() * byte[]表jpg格式的图片数据
*/
publicclass ExportExcel<T> {
public void exportExcel(Collection<T> dataset, OutputStream out) {
exportExcel("测试POI导出EXCEL文档",null, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset, OutputStream out) {
exportExcel("测试POI导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset, OutputStream out, String pattern) {
exportExcel("测试POI导出EXCEL文档", headers, 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")
public void exportExcel(String title, String[] headers, 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("leno");// 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();
// 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++) {
HSSFCell cell= row.createCell(i);
cell.setCellStyle(style2);
Field field= fields[i];
String fieldName = field.getName();
String getMethodName= "get" + fieldName.substring(0, 1).toUpperCase()+ fieldName.substring(1); t
ry {
Class tCls= t.getClass();
Method getMethod = tCls.getMethod(getMethodName,new Class[] {});
Object value= getMethod.invoke(t, new Object[] {});
// 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 (valueinstanceof Boolean) {
boolean bValue = (Boolean) value; textValue= "男";
if (!bValue) { textValue= "女"; } }
elseif (value instanceof Date) {
Date date= (Date) value;
SimpleDateFormat sdf = new SimpleDateFormat(pattern);
textValue = sdf.format(date);
} elseif (value instanceofbyte[]) {
// 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+)?{1}quot;);
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) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch (NoSuchMethodException e) {
// TODO Auto-generated catch block e.printStackTrace();
}catch (IllegalArgumentException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}catch (IllegalAccessException e) {
// TODO Auto-generated catch block e.printStackTrace();
}catch (InvocationTargetException e) {
// TODO Auto-generated catch block e.printStackTrace();
}finally { // 清理资源} } }try { workbook.write(out);
}catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
public staticvoid 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("book.jpg"));
byte[] buf = newbyte[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, out); ex2.exportExcel(headers2, dataset2, 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();
} }}