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 转载时请保存以下信息，注明出处！
*
* @author leno
* @version v1.0
* @param <T>
* 利用泛型，代表任意1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
*/
public class 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1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1定条件的数据以EXCEL 的情势输出到指定IO装备上
*
* @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1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
* 与输出装备关联的流对象，可以将EXCEL文档导出到本地文件或网络中
* @param pattern
* 如果有时间数据，设定输出格式。默许为"yyy-MM-dd"
*/
@SuppressWarnings("unchecked"
)
public void exportExcel(String title, String[] headers,
Collection<T>
dataset, OutputStream out, String pattern) {
// 声明1个工作薄
HSSFWorkbook workbook =
new HSSFWorkbook();
// 生成1个表格
HSSFSheet sheet =
workbook.createSheet(title);
// 设置表格默许列宽度为15个字节
sheet.setDefaultColumnWidth((
short) 15
);
// 生成1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1个字体
HSSFFont font =
workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12
);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体利用到当前的样式
style.setFont(font);
// 生成并设置另外一个样式
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);
// 生成另外一个字体
HSSFFont font2 =
workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体利用到当前的样式
style2.setFont(font2);
// 声明1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属性的前后顺序，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
);
try {
Class tCls =
t.getClass();
Method getMethod =
tCls.getMethod(getMethodName,
new Class[] {});
Object value = getMethod.invoke(t,
new Object[] {});
// 判断值的类型落后行强迫类型转换
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1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是不是全部由数字组成
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) {
// 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 {
// 清算资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
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", "诞生日期"
};
List<Student> dataset =
new ArrayList<Student>
();
dataset.add(new Student(10000001, "张3", 20,
true,
new Date()));
dataset.add(new Student(20000002, "李4", 24,
false,
new Date()));
dataset.add(new Student(30000003, "王5", 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 =
new byte[bis.available()];
while ((bis.read(buf)) != ⑴
) {
//
}
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();
}
}
}
