POI生成excel报表

转载请注明:来自http://blog.csdn.net/M_ChangGong/作者:张燕广

本文旨在简单介绍在项目中加入POI，利用POI生成excel报表。
1．创建一个java工程或者web工程。
2．把POI的jar文件poi-3.5-beta5-20090219.jar（非本版本亦可）加到项目类路径下。
3．编写导出excel文件的类，代码如下:

package com.ctcmctv.poi;

import java.io.OutputStream;
import java.util.ArrayList;
import java.util.List;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
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 org.apache.poi.ss.util.Region;

public class TestExport implements ExportExcelReport {
	private static final long serialVersionUID = 1L;
	private HSSFWorkbook wb = null;
	private HSSFSheet sheet = null;
	private List<Student> studentList = null;
	
	/**
	 * 实现接口中的方法，必要的时候可以进行扩展
	 */
	public void  MyDoExport(OutputStream out) {
		doExport(out);
	}
	
	/**
	 * 执行导出方法
	 */
	public void doExport(OutputStream out){
		try {
			wb = new HSSFWorkbook();
			sheet = wb.createSheet();
			wb.setSheetName(0, "学生信息");
			studentList = getStudentList();
			createSheet(out, sheet, studentList);
			wb.write(out);
			out.close();
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * 创建excel工作薄
	 */
	@Deprecated
	public void createSheet(OutputStream out, HSSFSheet sheet,
			List<Student> sortList) {
		try {
			int rowNum = 0; // 标题开始行
			int colNum = 0; // 标题开始列
			HSSFRow row = null;
			HSSFCellStyle cellStyle = wb.createCellStyle();
			cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			cellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			cellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
			cellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
			cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);

			// 定义时段单元格列头内容的显示格式
			HSSFCellStyle headerStyle = wb.createCellStyle();
			headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			headerStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			headerStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			headerStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			headerStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
			headerStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
			headerStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
			HSSFFont bold1 = wb.createFont();
			bold1.setFontName("黑体");
			bold1.setFontHeightInPoints((short) 12);
			bold1.setBoldweight((short) 50);
			headerStyle.setFont(bold1);
			headerStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);
			headerStyle.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
			
			//基本数据样式设置字体
			cellStyle.setFont(bold1);
			
			//定义十堰自办频道显示格式
			HSSFCellStyle syCellStyle = wb.createCellStyle();
			syCellStyle.setBorderBottom(HSSFCellStyle.BORDER_THIN);
			syCellStyle.setBorderLeft(HSSFCellStyle.BORDER_THIN);
			syCellStyle.setBorderRight(HSSFCellStyle.BORDER_THIN);
			syCellStyle.setBorderTop(HSSFCellStyle.BORDER_THIN);
			syCellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
			syCellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
			HSSFFont syBold = wb.createFont();
			syBold.setFontName("黑体");
			syBold.setFontHeightInPoints((short) 12);
			syBold.setBoldweight((short) 50);
			syBold.setColor(HSSFFont.COLOR_RED);
			syCellStyle.setFont(syBold);
			
			//列头名称数组
			String[] titles = {"班级","学生编号","学生姓名","学生年龄"};
			HSSFCell cell = null;
			row = sheet.createRow(rowNum++);
			for (int k = 0; k < titles.length; k++) {
				cell = row.createCell((short) colNum++);
				cell.setCellStyle(headerStyle);
				cell.setCellValue(new HSSFRichTextString(titles[k]));
			}
			
			//将学生信息写入excel文件中
			for(Student stu : studentList){
				row = sheet.createRow(rowNum++);
				colNum=0;
				
				cell = row.createCell((short) colNum++);
				cell.setCellStyle(cellStyle);
				cell.setCellValue(new HSSFRichTextString(stu.getClassName()));
				
				cell = row.createCell((short) colNum++);
				cell.setCellStyle(cellStyle);
				cell.setCellValue(new HSSFRichTextString(stu.getStuNo()));
				
				cell = row.createCell((short) colNum++);
				cell.setCellStyle(cellStyle);
				cell.setCellValue(new HSSFRichTextString(stu.getStuName()));
				
				cell = row.createCell((short) colNum++);
				cell.setCellStyle(cellStyle);
				cell.setCellValue(new HSSFRichTextString(String.valueOf(stu.getStuAge())));
			}
			int rowFrom = 1;
			int rowTo = studentList.size();
			short colFrom = 0;
			short colTo = 0;
			
			sheet.addMergedRegion(new Region(rowFrom,colFrom,rowTo,colTo));
			sheet.setHorizontallyCenter(true);
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
	
	/**
	 * 模拟数据库获取数据
	 * @return
	 */
	private List<Student> getStudentList(){
		List<Student> stuList = new ArrayList();
		for(int i=0;i<9;i++){
			Student stu = new Student();
			stu.setStuNo("20040103010"+(i+1));
			stu.setStuName("Changong"+i);
			stu.setStuAge(20+i);
			stu.setClassName("04计1");
			stuList.add(stu);
		}
		return stuList;
	}
}

class Student{
	private String stuNo;
	private String stuName;
	private int stuAge;
	private String className;
	
	public String getStuNo() {
		return stuNo;
	}
	public void setStuNo(String stuNo) {
		this.stuNo = stuNo;
	}
	public String getStuName() {
		return stuName;
	}
	public void setStuName(String stuName) {
		this.stuName = stuName;
	}
	public int getStuAge() {
		return stuAge;
	}
	public void setStuAge(int stuAge) {
		this.stuAge = stuAge;
	}
	public String getClassName() {
		return className;
	}
	public void setClassName(String className) {
		this.className = className;
	}
}

4．编写测试类（当然也可以用junit），此处没有使用junit，仅仅编写了一个普通java类，代码如下：

package com.ctcmctv.test;

import java.io.FileOutputStream;
import java.io.OutputStream;
import com.ctcmctv.poi.ExportExcelReport;
import com.ctcmctv.poi.TestExport;

public class Test {
	public static void main(String[] args) {
		ExportExcelReport exportExcelReport = 
            new TestExport();
		String path = "d://test//04计1.xls";
		OutputStream fileOut;
		try {
			fileOut = new FileOutputStream(path);
			exportExcelReport.MyDoExport(fileOut);
		} catch (Exception e1) {
			e1.printStackTrace();
		}
	}
}

5．生成excel报表如下图所示：