Java模块 -，

Java模块 -，

Java 导出 Excel文件 小Demo

用的是 POI ,jar包百度上很好...这里就不多说了...

代码结构图:

students 实体类

package com.code.model;

import java.util.Date;

/**
 * Created by CYX on 2016/5/30.
 */
public class Students {
    private int id;
    private String name;
    private int age;
    private Date birth;

    @Override
    public String toString() {
        return "Students{" +
                "id=" + id +
                ", name='" + name + '\'' +
                ", age=" + age +
                ", 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;
    }

    public Students() {
    }

    public Students(int id, String name, int age, Date birth) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.birth = birth;
    }
}

CreateSimpleExcelToDisk

package com.code.excel;

import com.code.model.Students;
import org.apache.poi.hssf.usermodel.*;

import java.io.FileOutputStream;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;

/**
 * Created by CYX on 2016/5/30.
 *
 *      常用组件
 *          HSSFWorkbook : excel的文档对象
 *          HSSFSheet : Excel的表单
 *          HSSFRow : Excel的行
 *          HSSFCell : Excel的格子单元
 *          HSSFFont : excel的字体
 *          HSSFDateFormat : 日期格式
 *          HSSFHeader : sheet头
 *          HSSFFooter : sheet尾
 *
 *      样式
 *          HSSFCellStyle : cell样式
 *
 *      辅助操作
 *          HSSFDateUtil : 日期
 *          HSSFPrintSetup : 打印
 *          HSSFErrorConstant : 错误信息表
 *
 */
public class CreateSimpleExcelToDisk {

    public static void main(String[] args) throws Exception{
        //第一步,创建HSSFWorkbook对象,对应的一个Excel文件
        HSSFWorkbook wb = new HSSFWorkbook();

        //第二步, (创建HSSFSheet对象) 在webbook中添加一个sheet,对应Excel文件中的sheet
        HSSFSheet sheet = wb.createSheet("学生表一");

        //第三步, (创建HSSFRow对象) 在sheet中添加表头第0行,注意 老版本的poi对Excel的行数列数有限制short
        HSSFRow row = sheet.createRow((int) 0);

        //第四步,创建单元格,并设置表头,设置表头居中
        HSSFCellStyle style = wb.createCellStyle();
        style.setAlignment(HSSFCellStyle.ALIGN_CENTER); //创建一个居中格式

        //(创建HSSFCell对象)
        HSSFCell cell = row.createCell((short) 0);
        cell.setCellValue("学号");
        cell.setCellStyle(style);

        cell = row.createCell((short) 1);
        cell.setCellValue("姓名");
        cell.setCellStyle(style);

        cell = row.createCell((short) 2);
        cell.setCellValue("年龄");
        cell.setCellStyle(style);

        cell = row.createCell((short) 3);
        cell.setCellValue("生日");
        cell.setCellStyle(style);

        //第五步,写入实体数据,实际应用中这些数据从数据库中得到
        List list = CreateSimpleExcelToDisk.getStudents();
        for (int i = 0; i < list.size(); i++) {
            row = sheet.createRow((int) i + 1);
            Students students = (Students) list.get(i);

            //第四步,创建单元格,并设置值
            row.createCell((short)0).setCellValue((double)students.getId());
            row.createCell((short) 1).setCellValue(students.getName());
            row.createCell((short) 2).setCellValue((double)students.getAge());
            cell = row.createCell((short) 3);
            cell.setCellValue(new SimpleDateFormat("yyyy-mm-dd").format(students.getBirth()));
        }

        //第六步,将文件存到指定位置
        FileOutputStream fout = new FileOutputStream("D:/students.xls");
        wb.write(fout);
        fout.close();

    }


    //手工构建一个简单格式的Excel
    private static List<Students> getStudents() throws Exception{

        List list = new ArrayList();
        SimpleDateFormat sdf = new SimpleDateFormat("yyyy-mm-dd");

        Students user1 = new Students(1,"张三",16,sdf.parse("1997-03-12"));
        Students user2 = new Students(1,"李四",17,sdf.parse("1997-03-13"));
        Students user3 = new Students(1,"王五",18,sdf.parse("1997-03-14"));
        Students user4 = new Students(1,"赵六",19,sdf.parse("1997-03-15"));
        Students user5 = new Students(1,"钱七",20,sdf.parse("1997-03-16"));

        list.add(user1);
        list.add(user2);
        list.add(user3);
        list.add(user4);
        list.add(user5);
        return list;
    }

}

然后直接跑就好了...

代码参考:  http://www.cnblogs.com/bmbm/archive/2011/12/08/2342261.html