Java和poi导出excel报表

原创

sxdtzhaoxinguo 2022-11-24 19:35:05 博主文章分类：Java后端技术 ©著作权

文章标签 java apache 数据 文章分类 运维

©著作权归作者所有：来自51CTO博客作者sxdtzhaoxinguo的原创作品，请联系作者获取转载授权，否则将追究法律责任

一：poi jar下载地址：点击打开链接：

二：工程截图：

Java和poi导出excel报表_数据

三：运行效果截图：

Java和poi导出excel报表_数据_02

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>