一：poi jar下載地址：點(diǎn)擊打開(kāi)鏈接：

二：工程截圖：

三：運(yùn)行效果截圖：

四：源代碼：

Student.java:

package com.poi.bean;import java.util.Date;public class Student {private long id;// 學(xué)號(hào)private String name;// 姓名private int age;// 年齡private boolean sex;// 性別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;// 圖書(shū)編號(hào)private String name;// 圖書(shū)名稱private String author;// 圖書(shū)作者private float price;// 圖書(shū)價(jià)格private String isbn;// 圖書(shū)ISBNprivate String pubName;// 圖書(shū)出版社private byte[] preface;// 封面圖片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;/*** 利用開(kāi)源組件POI3.0.2動(dòng)態(tài)導(dǎo)出EXCEL文檔 轉(zhuǎn)載時(shí)請(qǐng)保留以下信息，注明出處！* * @author zhaoxinguo* @version v1.0* @param <T>應(yīng)用泛型，代表任意一個(gè)符合javabean風(fēng)格的類* 注意這里為了簡(jiǎn)單起見(jiàn)，boolean型的屬性xxx的get器方式為getXxx(),而不是isXxx() byte[]表jpg格式的圖片數(shù)據(jù)*/ public class ExportExcel<T> {public void exportExcel(Collection<T> dataset, OutputStream out){exportExcel("測(cè)試POI導(dǎo)出EXCEL文檔", null, dataset, out, "yyyy-MM-dd");}public void exportExcel(String[] headers, Collection<T> dataset,OutputStream out) {exportExcel("測(cè)試POI導(dǎo)出EXCEL文檔", headers, dataset, out, "yyyy-MM-dd");}public void exportExcel(String[] headers, Collection<T> dataset,OutputStream out, String pattern) {exportExcel("測(cè)試POI導(dǎo)出EXCEL文檔", headers, dataset, out, pattern);}/*** 這是一個(gè)通用的方法，利用了JAVA的反射機(jī)制，可以將放置在JAVA集合中并且符號(hào)一定條件的數(shù)據(jù)以EXCEL 的形式輸出到指定IO設(shè)備上* * @param title* 表格標(biāo)題名* @param headers表格屬性列名數(shù)組* @param dataset需要顯示的數(shù)據(jù)集合* ,集合中一定要放置符合javabean風(fēng)格的類的對(duì)象。此方法支持的javabean屬性的數(shù)據(jù)類型有基本數(shù)據(jù)類型及String* ,Date,byte[](圖片數(shù)據(jù))* @param out與輸出設(shè)備關(guān)聯(lián)的流對(duì)象* ，可以將EXCEL文檔導(dǎo)出到本地文件或者網(wǎng)絡(luò)中* @param pattern如果有時(shí)間數(shù)據(jù)* ，設(shè)定輸出格式。默認(rèn)為"yyy-MM-dd"*/public void exportExcel(String title, String[] headers, Collection<T> dataset, OutputStream out, String pattern){//聲明一個(gè)工作薄HSSFWorkbook workbook = new HSSFWorkbook();//生成一個(gè)表格HSSFSheet sheet = workbook.createSheet(title);//設(shè)置表格默認(rèn)列寬為15個(gè)字節(jié)sheet.setDefaultColumnWidth((short) 15);//生成一個(gè)樣式HSSFCellStyle style = workbook.createCellStyle();//設(shè)置這些樣式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);//生成一個(gè)字體HSSFFont font = workbook.createFont();font.setColor(HSSFColor.VIOLET.index);font.setFontHeightInPoints((short) 12);font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//把字體應(yīng)用到當(dāng)前的樣式style.setFont(font);//生成并設(shè)置另一樣式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);//生成另一個(gè)字體HSSFFont font2 = workbook.createFont();font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);//把字體應(yīng)用到當(dāng)前樣式style2.setFont(font2);//聲明一個(gè)畫(huà)圖的頂級(jí)管理器HSSFPatriarch patriarch = sheet.createDrawingPatriarch();//定義注釋的大小和位置,詳見(jiàn)文檔HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0, 0, 0, 0, (short) 4, 2, (short) 6, 5));//設(shè)置注釋內(nèi)容comment.setString(new HSSFRichTextString("可以在POI中添加注釋！"));//設(shè)置注釋作者，當(dāng)鼠標(biāo)移動(dòng)到單元格上是可以在狀態(tài)欄中看到該內(nèi)容.comment.setAuthor("zhaoxinguo");//產(chǎn)生表格標(biāo)題行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);}//遍歷集合數(shù)據(jù)，產(chǎn)生數(shù)據(jù)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，根據(jù)javabean屬性的先后順序，動(dòng)態(tài)調(diào)用getXxx()方法得到屬性值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[] {});//判斷值的類型后進(jìn)行強(qiáng)制類型轉(zhuǎn)換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[]){// 有圖片時(shí)，設(shè)置行高為60px;row.setHeightInPoints(60);// 設(shè)置圖片所在列寬度為80px,注意這里單位的一個(gè)換算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 {//其它數(shù)據(jù)類型都當(dāng)作字符串簡(jiǎn)單處理textValue = value.toString();}//如果不是圖片數(shù)據(jù)，就利用正則表達(dá)式判斷textValue是否全部由數(shù)字組成if(textValue != null){Pattern p = Pattern.compile("^//d+(//.//d+)?$"); Matcher matcher = p.matcher(textValue);if(matcher.matches()){//是數(shù)字當(dāng)作double處理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{//清理資源}}}try {workbook.write(out);} catch (IOException e) {e.printStackTrace();}}public static void main(String[] args) throws Exception{//測(cè)試學(xué)生ExportExcel<Student> exportExcel = new ExportExcel<Student>();String[] headers = {"學(xué)號(hào)","姓名","年齡","性別","出生日期"};List<Student> dataset = new ArrayList<Student>();dataset.add(new Student(10000001, "張三", 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, "導(dǎo)出成功");//測(cè)試圖書(shū)/*ExportExcel<Book> exportExcel2 = new ExportExcel<Book>();String[] headers2 = {"圖書(shū)編號(hào)", "圖書(shū)名稱", "圖書(shū)作者", "圖書(shū)價(jià)格", "圖書(shū)ISBN","圖書(shū)出版社", "封面圖片" };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", "清華出版社",buf));dataset2.add(new Book(2, "java編程思想", "brucl", 300.33f, "1234567","陽(yáng)光出版社", buf));dataset2.add(new Book(3, "DOM藝術(shù)", "lenotang", 300.33f, "1234567","清華出版社", buf));dataset2.add(new Book(4, "c++經(jīng)典", "leno", 400.33f, "1234567", "清華出版社",buf));dataset2.add(new Book(5, "c#入門(mén)", "leno", 300.33f, "1234567", "湯春秀出版社",buf));OutputStream out2 = new FileOutputStream("E://Book.xls");exportExcel2.exportExcel(headers2, dataset2, out2);out2.close();JOptionPane.showMessageDialog(null, "導(dǎo)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導(dǎo)出動(dòng)態(tài)生成的excel文件，數(shù)據(jù)可以來(lái)源于數(shù)據(jù)庫(kù)* 這樣，瀏覽器客戶端就可以訪問(wèn)該servlet得到一份用java代碼動(dòng)態(tài)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");//測(cè)試圖書(shū)ExportExcel<Book> ex = new ExportExcel<Book>();String[] headers = { "圖書(shū)編號(hào)", "圖書(shū)名稱", "圖書(shū)作者", "圖書(shū)價(jià)格", "圖書(shū)ISBN","圖書(shū)出版社", "封面圖片" };List<Book> dataset = new ArrayList<Book>();BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));byte[] buf = new byte[bis.available()];while ((bis.read(buf)) != -1) {// 將圖片數(shù)據(jù)存放到緩沖數(shù)組中}dataset.add(new Book(1, "jsp", "leno", 300.33f, "1234567", "清華出版社", buf));dataset.add(new Book(2, "java編程思想", "brucl", 300.33f, "1234567","陽(yáng)光出版社", buf));dataset.add(new Book(3, "DOM藝術(shù)", "lenotang", 300.33f, "1234567","清華出版社", buf));dataset.add(new Book(4, "c++經(jīng)典", "leno", 400.33f, "1234567", "清華出版社",buf));dataset.add(new Book(5, "c#入門(mén)", "leno", 300.33f, "1234567", "湯春秀出版社",buf));OutputStream out = response.getOutputStream();ex.exportExcel(headers, dataset, out);out.close();logger.info("excel導(dǎo)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>

總結(jié)

以上是生活随笔為你收集整理的Java和poi导出excel报表的全部?jī)?nèi)容，希望文章能夠幫你解決所遇到的問(wèn)題。

如果覺(jué)得生活随笔網(wǎng)站內(nèi)容還不錯(cuò)，歡迎將生活随笔推薦給好友。