POI 导出excel文件

package com.pingan.haofang.connector.controller;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.lang.reflect.InvocationTargetException;import java.lang.reflect.Method;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.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 org.apache.poi.ss.usermodel.ClientAnchor.AnchorType;/** * 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 */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);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(AnchorType.MOVE_DONT_RESIZE);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 (NoSuchMethodException e) {e.printStackTrace();} catch (IllegalArgumentException e) {e.printStackTrace();} catch (IllegalAccessException e) {e.printStackTrace();} catch (InvocationTargetException e) {e.printStackTrace();} finally {// 清理资源}}}try {workbook.write(out);} catch (IOException e) {e.printStackTrace();}}public void test() {// 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("D://book.png"));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("D://test//测试1.xls");OutputStream out2 = new FileOutputStream("D://test//测试2.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) {e.printStackTrace();} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) {ExportExcel<?> ec = new ExportExcel<Student>();ec.test();}}

package com.pingan.haofang.connector.controller;import java.util.Date;public class Student {private long id;private String name;private int age;private boolean sex;private Date birthday;public Student() {}public Student(long id, String name, int age, boolean sex, Date birthday) {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;}}

package com.pingan.haofang.connector.controller;public 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() {}public Book(int bookId, String name, String author, float price,String isbn, String pubName, byte[] preface) {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;}}