利用开源组件POI3.0.2动态导出EXCEL文档

利用开源组件POI3.0.2动态导出EXCEL文档

package com.test.cms.util.tools;

import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.Collection;
import java.util.Date;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import org.apache.commons.lang3.StringUtils;
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;

/**
* 利用开源组件POI3.0.2动态导出EXCEL文档
*
* @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
* @param <T>
*/
public class ExportExcel<T>
{
/**
* 预设列宽
*/
public static final Integer DEFAULTCOLUMNWIDTH = 15;

/**
* 预设字体大小
*/
public static final Short FONTHEIGHTINPOINTS = 12;

/**
* 预设表头起始行索引值
*/
public static final Short TITLE_ROW_INDEX = 0;

/**
* 预设表体起始行索引值
*/
public static final Short BODY_ROW_INDEX = 1;

public void exportExcel(Map<String, String> headers, List<T> dataset, OutputStream out)
{
exportExcel("导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
}

public void exportExcel(String[] headers, Collection<T> dataset, OutputStream out) {
exportExcel("导出EXCEL文档", headers, dataset, out, "yyyy-MM-dd");
}

public void exportExcel(Map<String, String> headers, List<T> dataset, OutputStream out, String pattern)
{
exportExcel("导出EXCEL文档", headers, dataset, out, pattern);
}

@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();

if(t instanceof Object[])
{
Object[] obj = (Object[])t;
for(int i=0; i<obj.length; i++)
{
HSSFCell cell = row.createCell(i);
cell.setCellStyle(style2);
String textValue = null;
Object value = obj[i];
if (value instanceof Integer)
{
int intValue = (Integer)value;
cell.setCellValue(intValue);
}
else if (value instanceof Float)
{
float fValue = (Float)value;
cell.setCellValue(new HSSFRichTextString(String.valueOf(fValue)));
}
else if (value instanceof Double)
{
double dValue = (Double)value;
cell.setCellValue(new HSSFRichTextString(String.valueOf(dValue)));
}
else if (value instanceof Long)
{
long longValue = (Long)value;
cell.setCellValue(longValue);
}
// else 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;
cell.getRow().setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
cell.getSheet().setColumnWidth(cell.getColumnIndex(), (short)(35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[])value;
HSSFClientAnchor anchor =
new HSSFClientAnchor(0, 0, 0, 255, (short)6, cell.getRowIndex(), (short)6, cell.getRowIndex());
anchor.setAnchorType(2);
patriarch.createPicture(anchor,
cell.getSheet().getWorkbook().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 = cell.getSheet().getWorkbook().createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
}
}

}
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
}

}

/**
* 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 sheetName
* 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"
*/
public void exportExcel(String sheetName, Map<String, String> headers, List<T> dataset, OutputStream out,
String pattern)
{
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
try
{
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(sheetName);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth(DEFAULTCOLUMNWIDTH);
// 生成表头样式
HSSFCellStyle titleStyle = setTitleStyle(workbook);
// 生成表体样式
HSSFCellStyle bodyStyle = setBodyStyle(workbook);
// 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("cloudbms");
// 产生表格标题行
HSSFRow row = sheet.createRow(TITLE_ROW_INDEX);
HSSFCell cell = null;
HSSFRichTextString text = null;

int i = 0;
for (String header : headers.keySet())
{
cell = row.createCell(i);
cell.setCellStyle(titleStyle);
text = new HSSFRichTextString(headers.get(header));
cell.setCellValue(text);
i++;
}
Method[] methods = null;
String fieldName = null;
Object value = null;
//生成表体数据
for (int j = 0; j < dataset.size(); j++)
{
//创建表体行
row = sheet.createRow(j + 1);
//获得所有方法
methods = dataset.get(j).getClass().getDeclaredMethods();
int cellIndex=0;
//按表头顺序添加单元格
for (String header : headers.keySet())
{
for (Method method : methods)
{
fieldName = StringUtils.substringAfter(method.getName(), "get");
if (StringUtils.equalsIgnoreCase(header, fieldName))
{
//创建单元格
cell = row.createCell(cellIndex);
cell.setCellStyle(bodyStyle);
//设置单元格数值
value = method.invoke(dataset.get(j));
if (null == value)
{
value = "";
}
setCellValue(cell, value, pattern, patriarch);
}
}
cellIndex++;
}
}
}
catch (Exception e)
{
e.printStackTrace();
}

try
{
workbook.write(out);
}
catch (IOException e)
{
e.printStackTrace();
}

}

/**
* 设置单元格数值
* @param cell
* @param value
* @param pattern
* @param patriarch
* @return
* @see [类、类#方法、类#成员]
*/
private HSSFCell setCellValue(HSSFCell cell, Object value, String pattern, HSSFPatriarch patriarch)
{
// 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;
cell.setCellValue(new HSSFRichTextString(String.valueOf(fValue)));
}
else if (value instanceof Double)
{
double dValue = (Double)value;
cell.setCellValue(new HSSFRichTextString(String.valueOf(dValue)));
}
else if (value instanceof Long)
{
long longValue = (Long)value;
cell.setCellValue(longValue);
}
//boolean类型返回值
else if (value instanceof Boolean)
{
boolean bValue = (Boolean)value;
textValue = "已回复";
if (!bValue)
{
textValue = "未回复";
}
}
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;
cell.getRow().setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
cell.getSheet().setColumnWidth(cell.getColumnIndex(), (short)(35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[])value;
HSSFClientAnchor anchor =
new HSSFClientAnchor(0, 0, 0, 255, (short)6, cell.getRowIndex(), (short)6, cell.getRowIndex());
anchor.setAnchorType(2);
patriarch.createPicture(anchor,
cell.getSheet().getWorkbook().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 = cell.getSheet().getWorkbook().createFont();
font3.setColor(HSSFColor.BLUE.index);
richString.applyFont(font3);
cell.setCellValue(richString);
}
}
return cell;
}

/**
* 设置表体样式
* @param workbook
* @return
* @see [类、类#方法、类#成员]
*/
private HSSFCellStyle setBodyStyle(HSSFWorkbook workbook)
{
HSSFCellStyle bodyStyle = workbook.createCellStyle();
bodyStyle.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
bodyStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
bodyStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
bodyStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
bodyStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
bodyStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
bodyStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
bodyStyle.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
bodyStyle.setFont(font2);
return bodyStyle;
}

/**
* 设置表头样式
* @param workbook
* @return
* @see [类、类#方法、类#成员]
*/
private HSSFCellStyle setTitleStyle(HSSFWorkbook workbook)
{
HSSFCellStyle style = workbook.createCellStyle();
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(FONTHEIGHTINPOINTS);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
return style;
}

/* 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("book.jpg"));
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, 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();
}
}*/
}