Java POI 创建 Excel 示例-优快云博客

参考：

http://www.cnblogs.com/zhenmingliu/archive/2012/04/25/2469396.html
http://blog.youkuaiyun.com/hantiannan/article/details/5312133

先来个实体类，模拟数据用的：

import java.util.Date;
/** * @author  作者 :I_T_T_I
 * @date 创建时间：2016年7月27日 下午6:15:09 
 * */
public class Student {
    private int id;  
    private String name;  
    private int age;  
    private Date birth;  
    public Student()  
    {  
    }  
    public Student(int id, String name, int age, Date birth)  
    {  
        this.id = id;  
        this.name = name;  
        this.age = age;  
        this.birth = birth;  
    }  
    public int getId()  
    {  
        return id;  
    }  

    public void setId(int 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 Date getBirth()  
    {  
        return birth;  
    }  
    public void setBirth(Date birth)  
    {  
        this.birth = birth;  
    }  
}

/** * @author  作者 :I_T_T_I
 * @date 创建时间：2016年7月27日 下午6:16:34 
 * */
import java.io.FileOutputStream;  
import java.text.DateFormat;
import java.text.SimpleDateFormat;  
import java.util.ArrayList;  
import java.util.Date;
import java.util.List;  
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.hssf.util.Region;
import org.apache.poi.ss.usermodel.CellStyle;

public class CreateExcel 
{  
    /** 
     * @功能：手工构建一个简单格式的Excel 
     */  
    private static List<Student> getStudent() throws Exception  
    {  
        List<Student> list = new ArrayList<Student>();  
        SimpleDateFormat df = new SimpleDateFormat("yyyy-mm-dd");  

        Student user1 = new Student(1, "张华", 10, df.parse("2006-07-12"));  
        Student user2 = new Student(2, "小红", 20, df.parse("1996-08-12"));  
        Student user3 = new Student(3, "小明", 30, df.parse("1986-11-12"));   
        list.add(user1);  
        list.add(user2);  
        list.add(user3);  
        return list;  
    }  

    @SuppressWarnings("deprecation")
    public static void main(String[] args) throws Exception  
    {  
        //创建一个webbook，对应一个Excel文件  
        HSSFWorkbook wb = new HSSFWorkbook();  
        //在webbook中添加一个sheet,对应Excel文件中的sheet  
        HSSFSheet sheet = wb.createSheet("学生表一");  
        //在sheet中添加表头第0行,注意老版本poi对Excel的行数列数有限制short  
        HSSFRow row = sheet.createRow((short) 1);  
        //设置第三列宽度（从0开始）
        sheet.setColumnWidth(3, 40*256); 
   /**
    * 设置首行样式    
    */

    HSSFRow rows = sheet.createRow((short) 0); 
    HSSFCell cells = rows.createCell(0);
        // 单元格合并   
        // 四个参数分别是：起始行，起始列，结束行，结束列 
        sheet.addMergedRegion(new Region(0, (short) ( 0), 0,(short) (3)));  
        //设置高度
        rows.setHeight((short) 1200);
        //表格风格对象
        CellStyle cellStyles = wb.createCellStyle();
        //颜色
    cellStyles.setFillForegroundColor(HSSFColor.GOLD.index);  
    //有上下边框，无左右
//  cellStyles.setBorderBottom(HSSFCellStyle.BORDER_THICK);  
//  cellStyles.setBorderTop(HSSFCellStyle.BORDER_THICK);  
    cellStyles.setAlignment(HSSFCellStyle.ALIGN_CENTER);// 设置单元格为水平对齐的类
    //字体对象
        HSSFFont fs  = wb.createFont();      
        fs.setFontHeightInPoints( (short) 50);//字号      
        fs.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示 
//      fs.setFontName("");//设置字体
//  fs.setColor(IndexedColors.BLUE_GREY.getIndex());//字体颜色
    cellStyles.setFont(fs);
        cells.setCellValue("学生表");
        cells.setCellStyle(cellStyles);
        // 设置单元格样式  
        CellStyle cellStyle = wb.createCellStyle();
        //颜色
    cellStyle.setFillForegroundColor(HSSFColor.LIGHT_GREEN.index);  
    //填充模式
    cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
    //有上下边框，无左右
//  cellStyle.setBorderBottom(HSSFCellStyle.BORDER_THICK);  
//  cellStyle.setBorderTop(HSSFCellStyle.BORDER_THICK);  
//  cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
    //字体对象
        HSSFFont f  = wb.createFont();      
        f.setFontHeightInPoints((short) 14);//字号      
        f.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示 
    cellStyle.setFont(f);

        HSSFCell cell = row.createCell(0);
        cell.setCellValue("学号"); 
        cell.setCellStyle(cellStyle);
        cell = row.createCell(1);  
        cell.setCellValue("姓名"); 
        cell.setCellStyle(cellStyle);
        cell = row.createCell(2);  
        cell.setCellValue("年龄");  
        cell.setCellStyle(cellStyle);
        cell = row.createCell(3);  
        cell.setCellValue("生日");  
        cell.setCellStyle(cellStyle);



        //写入实体数据 实际应用中这些数据从数据库得到，  
        List<Student> list = CreateSimpleExcelToDisk.getStudent();  

        HSSFFont ff  = wb.createFont();      
        //     f.setFontHeightInPoints((short) 11);//字号      
        ff.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);//粗体显示 
        /**
       * 设置编号的格式：c1
       * 字体加粗,有边框
       */

        CellStyle c1 = wb.createCellStyle();
//      c1.setBorderBottom(HSSFCellStyle.BORDER_THICK);  
//  c1.setBorderLeft(HSSFCellStyle.BORDER_THICK);  
//  c1.setBorderRight(HSSFCellStyle.BORDER_THICK);  
//  c1.setBorderTop(HSSFCellStyle.BORDER_THICK);  
        c1.setFillForegroundColor(HSSFColor.LIGHT_TURQUOISE.index);
        c1.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
    c1.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        c1.setFont(ff);
        /**
       * 设置值的格式：c2
       * 有边框
       */
        CellStyle c2 = wb.createCellStyle();
//      c2.setBorderBottom(HSSFCellStyle.BORDER_THICK);  
//  c2.setBorderLeft(HSSFCellStyle.BORDER_THICK);  
//  c2.setBorderRight(HSSFCellStyle.BORDER_THICK);  
//  c2.setBorderTop(HSSFCellStyle.BORDER_THICK);  
        //颜色
        c2.setFillForegroundColor(HSSFColor.LIGHT_YELLOW.index);
    //填充模式
        c2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  
        c2.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        for (int i = 0; i < list.size(); i++)  
        {  

            row = sheet.createRow((int) i + 2);  
            Student stu = (Student) list.get(i);
            // 创建单元格，并设置值  
            cell = row.createCell(0); 
            cell.setCellValue((double) stu.getId());  
            cell.setCellStyle(c1);

            cell = row.createCell(1);
            cell.setCellValue(stu.getName());
            cell.setCellStyle(c2);

            cell = row.createCell(2);
            cell.setCellValue((double) stu.getAge());  
            cell.setCellStyle(c2);

            cell = row.createCell(3);  
            cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu  
                    .getBirth()));  
            cell.setCellStyle(c2);

//            奇偶行不同颜色 
//           i++;
//            if(i < list.size()){
//            row = sheet.createRow((int) i + 2);  
//            stu = (Student) list.get(i);  
//            // 创建单元格，并设置值  
//            cell = row.createCell(0); 
//            cell.setCellValue((double) stu.getId());  
//            cell.setCellStyle(c1);
//            
//            cell = row.createCell(1);
//            cell.setCellValue(stu.getName());
//            cell.setCellStyle(c2);
//            
//            cell = row.createCell(2);
//            cell.setCellValue((double) stu.getAge());  
//            cell.setCellStyle(c2);
//            
//            cell = row.createCell(3);  
//            cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(stu  
//                    .getBirth()));  
//            cell.setCellStyle(c2);
//            }

        }  
        // 将文件存到指定位置  
        try  
        {  
            Date dat = new Date();
        DateFormat format = new SimpleDateFormat("yyyy-MM-dd_HHmmss");
        String time = format.format(dat);
        String path = "E:/students_"+time+".xls";
            FileOutputStream fout = new FileOutputStream(path);  
            wb.write(fout);  
            fout.close();  
        }  
        catch (Exception e)  
        {  
            e.printStackTrace();  
        }  
    }  
}