Java和poi导出excel报表
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ISBN
private 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*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>