一:poi jar下载地址:点击打开链接:
二:工程截图:
三:运行效果截图:
四:源代码:
Student.java:
package com.poi.bean;import java.util.Date;public class Student {private long id;// 学号private String name;// 姓名private int age;// 年龄private boolean sex;// 性别private Date birthday;// 出生日期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;}}
Book.java
package com.poi.bean;public class Book {private int bookId;// 图书编号private String name;// 图书名称private String author;// 图书作者private float price;// 图书价格private String isbn;// 图书ISBNprivate String pubName;// 图书出版社private byte[] preface;// 封面图片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;}}
ExportExcel.java
package com.poi.util;import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
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 com.poi.bean.Student;/*** 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 zhaoxinguo* @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"*/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("zhaoxinguo");//产生表格标题行HSSFRow row = sheet.createRow(0);for (int 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 (int 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));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+)?$"); 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 (Exception e) {e.printStackTrace();} finally{//清理资源}}}try {workbook.write(out);} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) throws Exception{//测试学生ExportExcel<Student> exportExcel = 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()));OutputStream out = new FileOutputStream("E://Student.xls");exportExcel.exportExcel(headers, dataset, out);out.close();JOptionPane.showMessageDialog(null, "导出成功");//测试图书/*ExportExcel<Book> exportExcel2 = 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>();BufferedInputStream bis = new BufferedInputStream(new FileInputStream("D://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 out2 = new FileOutputStream("E://Book.xls");exportExcel2.exportExcel(headers2, dataset2, out2);out2.close();JOptionPane.showMessageDialog(null, "导出成功");*/}
}
ExportServlet.java
package com.poi.servlet;import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;import org.apache.log4j.Logger;import com.poi.bean.Book;
import com.poi.util.ExportExcel;
/*** * @author zhaoxinguo* 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 ExportServlet extends HttpServlet {private static final long serialVersionUID = 1L;private Logger logger = Logger.getLogger(ExportServlet.class);public ExportServlet() {super();}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>();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();logger.info("excel导出成功!");}protected void doPost(HttpServletRequest request,HttpServletResponse response) throws ServletException, IOException {doGet(request, response);}}
web.xml
<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5"><display-name>poi</display-name><welcome-file-list><welcome-file>index.html</welcome-file><welcome-file>index.htm</welcome-file><welcome-file>index.jsp</welcome-file><welcome-file>default.html</welcome-file><welcome-file>default.htm</welcome-file><welcome-file>default.jsp</welcome-file></welcome-file-list><servlet><description></description><display-name>ExportServlet</display-name><servlet-name>ExportServlet</servlet-name><servlet-class>com.poi.servlet.ExportServlet</servlet-class></servlet><servlet-mapping><servlet-name>ExportServlet</servlet-name><url-pattern>/ExportServlet</url-pattern></servlet-mapping>
</web-app>