Java和poi导出excel报表

超、凢脫俗 2024-02-17 14:50 9阅读 0赞

一：poi jar下载地址：[点击打开链接][Link 1] ：

二：工程截图：

![SouthEast][]

三：运行效果截图：

![SouthEast 1][]

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>

[Link 1]: http://poi.apache.org/
[SouthEast]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/30/f173d6d301ce4a47aa5e0c8e22810e25.png
[SouthEast 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/01/30/bf21efae0c634f2ebf8c43825cc533da.png