poi操作excel

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package poi.test;import java.util.Date;public class Student {    private long id;    private String name;    private int age;    private boolean sex;    private Date birthday;    public Student() {        super();    }    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;    }}

package poi.test;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() {        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;    }}

package poi.test;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;public class ExportExcel<T> {    private static BufferedInputStream bis;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);    }       @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 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));                        byte[] bsValue1 = (byte[]) value;                        HSSFClientAnchor anchor1 = new HSSFClientAnchor(0, 255,                        1023, 255, (short) 6, index, (short) 6, index);                        anchor1.setAnchorType(2);                        patriarch.createPicture(anchor, workbook.addPicture(                        bsValue1, 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 {                                 }            }        }        try {            workbook.write(out);        } catch (IOException e) {                     e.printStackTrace();        }    }    public static void main(String[] args) {               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()));              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 {            bis = new BufferedInputStream(                    new FileInputStream("d:\\s.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("d://a.xls");            OutputStream out2 = new FileOutputStream("d://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) {            e.printStackTrace();        } catch (IOException e) {            e.printStackTrace();        }    }}

package poi.test;import java.io.*;import java.util.ArrayList;import java.util.List;import javax.servlet.ServletException;import javax.servlet.http.HttpServletRequest;import javax.servlet.http.HttpServletResponse;/** * @author daking 使用servlet导出动态生成的excel文件，数据可以来源于数据库 *         这样，浏览器客户端就可以访问该servlet得到一份用java代码动态生成的excel文件 */public class Export extends javax.servlet.http.HttpServlet {    static final long serialVersionUID = 1L;    protected void doGet(HttpServletRequest request,            HttpServletResponse response) throws ServletException, IOException {        File file = new File(getServletContext()                .getRealPath("WEB-INF/book.jpg"));        response.setContentType("octets/stream");        response.addHeader("Content-Disposition",                "attachment;filename=test.xls");        // 测试图书        ExportExcel<Book> ex = new ExportExcel<Book>();        String[] headers = { "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> dataset = new ArrayList<Book>();        try {            BufferedInputStream bis = new BufferedInputStream(                    new FileInputStream(file));            byte[] buf = new byte[bis.available()];            while ((bis.read(buf)) != -1) {                // 将图片数据存放到缓冲数组中            }            dataset.add(new Book(1, "jsp", "leno", 300.33f, "1234567", "清华出版社",                    buf));            dataset.add(new Book(2, "java编程思想", "brucl", 300.33f, "1234567",                    "阳光出版社", buf));            dataset.add(new Book(3, "DOM艺术", "lenotang", 300.33f, "1234567",                    "清华出版社", buf));            dataset.add(new Book(4, "c++经典", "leno", 400.33f, "1234567",                    "清华出版社", buf));            dataset.add(new Book(5, "c#入门", "leno", 300.33f, "1234567",                    "汤春秀出版社", buf));            OutputStream out = response.getOutputStream();            ex.exportExcel(headers, dataset, out);            out.close();            System.out.println("excel导出成功！");        } catch (FileNotFoundException e) {                       e.printStackTrace();        } catch (IOException e) {                      e.printStackTrace();        }    }    protected void doPost(HttpServletRequest request,            HttpServletResponse response) throws ServletException, IOException {        doGet(request, response);    }}

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