將數據導出到Excel（java操作Excel）

1.封裝要到處的數據類，這裏使用Student類舉例：

[java] view plaincopy
package com.jeelon.exportExcle;

public class Student {
    private int id;
    private String name ;
    private int age;
    private String address;
    private String tel;
    private char sex;
    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 String getAddress() {
        return address;
    }
    public void setAddress(String address) {
        this.address = address;
    }
    public String getTel() {
        return tel;
    }
    public void setTel(String tel) {
        this.tel = tel;
    }
    public char getSex() {
        return sex;
    }
    public void setSex(char sex) {
        this.sex = sex;
    }
    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", age=" + age
                + ", address=" + address + ", tel=" + tel + ", sex=" + sex
                + "]";
    }
    public Student(int id, String name, int age, String address, String tel,
            char sex) {
        super();
        this.id = id;
        this.name = name;
        this.age = age;
        this.address = address;
        this.tel = tel;
        this.sex = sex;
    }
    public Student() {
        super();
    }


}

2.ExportExcel工具類

[java] view plaincopy
package com.jeelon.exportExcle;

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;

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.hssf.util.Region;

/**
* EXCEL報表工具類.
*
* @author Jeelon
*/
public class ExportExcel {

    private HSSFWorkbook wb = null;
    private HSSFSheet sheet = null;

    /**
     * @param wb
     * @param sheet
     */
    public ExportExcel(HSSFWorkbook wb, HSSFSheet sheet) {
        // super();
        this.wb = wb;
        this.sheet = sheet;
    }

    /**
     * 創建通用EXCEL頭部
     *
     * @param headString
     *            頭部顯示的字符
     * @param colSum
     *            該報表的列數
     */
    @SuppressWarnings({ "deprecation", "unused" })
    public void createNormalHead(String headString, int colSum) {
        HSSFRow row = sheet.createRow(0);
        // 設置第一行
        HSSFCell cell = row.createCell(0);
        // row.setHeight((short) 1000);

        // 定義單元格爲字符串類型
        cell.setCellType(HSSFCell.ENCODING_UTF_16);// 中文處理
        cell.setCellValue(new HSSFRichTextString(headString));

        // 指定合併區域
        /**
         * public Region(int rowFrom, short colFrom, int rowTo, short colTo)
         */
        sheet.addMergedRegion(new Region(0, (short) 0, 0, (short) colSum));

        // 定義單元格格式，添加單元格表樣式，並添加到工作簿
        HSSFCellStyle cellStyle = wb.createCellStyle();
        // 設置單元格水平對齊類型
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 指定單元格居中對齊
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 指定單元格垂直居中對齊
        cellStyle.setWrapText(true);// 指定單元格自動換行

        // 設置單元格字體
        HSSFFont font = wb.createFont();
        // font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // font.setFontName("宋體");
        // font.setFontHeight((short) 600);
        // cellStyle.setFont(font);
        cell.setCellStyle(cellStyle);
    }

    /**
     * 創建通用報表第二行
     *
     * @param params
     *            統計條件數組
     * @param colSum
     *            需要合併到的列索引
     */
    @SuppressWarnings("deprecation")
    public void createNormalTwoRow(String[] params, int colSum) {
        // 創建第二行
        HSSFRow row1 = sheet.createRow(1);

        row1.setHeight((short) 400);

        HSSFCell cell2 = row1.createCell(0);

        cell2.setCellType(HSSFCell.ENCODING_UTF_16);
        cell2.setCellValue(new HSSFRichTextString("時間：" + params[0] + "至"
                + params[1]));

        // 指定合併區域
        /**
         * public Region(int rowFrom, short colFrom, int rowTo, short colTo)
         */
        sheet.addMergedRegion(new Region(1, (short) 0, 1, (short) colSum));

        HSSFCellStyle cellStyle = wb.createCellStyle();
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 指定單元格居中對齊
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 指定單元格垂直居中對齊
        cellStyle.setWrapText(true);// 指定單元格自動換行

        // 設置單元格字體
        HSSFFont font = wb.createFont();
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        font.setFontName("宋體");
        font.setFontHeight((short) 250);
        cellStyle.setFont(font);

        cell2.setCellStyle(cellStyle);
    }

    /**
     * 設置報表標題
     *
     * @param columHeader
     *            標題字符串數組
     */
    public void createColumHeader(String[] columHeader) {

        // 設置列頭在第三行
        HSSFRow row2 = sheet.createRow(2);

        // 指定行高
        row2.setHeight((short) 600);

        HSSFCellStyle cellStyle = wb.createCellStyle();
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 指定單元格居中對齊
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 指定單元格垂直居中對齊
        cellStyle.setWrapText(true);// 指定單元格自動換行

        // 單元格字體
        HSSFFont font = wb.createFont();
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        font.setFontName("宋體");
        font.setFontHeight((short) 250);
        cellStyle.setFont(font);

        // 設置單元格背景色
        cellStyle.setFillForegroundColor(HSSFColor.GREY_25_PERCENT.index);
        cellStyle.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);

        HSSFCell cell3 = null;

        for (int i = 0; i < columHeader.length; i++) {
            cell3 = row2.createCell(i);
            cell3.setCellType(HSSFCell.ENCODING_UTF_16);
            cell3.setCellStyle(cellStyle);
            cell3.setCellValue(new HSSFRichTextString(columHeader[i]));
        }
    }

    /**
     * 創建內容單元格
     *
     * @param wb
     *            HSSFWorkbook
     * @param row
     *            HSSFRow
     * @param col
     *            short型的列索引
     * @param align
     *            對齊方式
     * @param val
     *            列值
     */
    public void cteateCell(HSSFWorkbook wb, HSSFRow row, int col, short align,
            String val) {
        HSSFCell cell = row.createCell(col);
        cell.setCellType(HSSFCell.ENCODING_UTF_16);
        cell.setCellValue(new HSSFRichTextString(val));
        HSSFCellStyle cellstyle = wb.createCellStyle();
        cellstyle.setAlignment(align);
        cell.setCellStyle(cellstyle);
    }

    /**
     * 創建合計行
     *
     * @param colSum
     *            需要合併到的列索引
     * @param cellValue
     */
    @SuppressWarnings("deprecation")
    public void createLastSumRow(int colSum, String[] cellValue) {

        HSSFCellStyle cellStyle = wb.createCellStyle();
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER); // 指定單元格居中對齊
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);// 指定單元格垂直居中對齊
        cellStyle.setWrapText(true);// 指定單元格自動換行

        // 單元格字體
        HSSFFont font = wb.createFont();
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        font.setFontName("宋體");
        font.setFontHeight((short) 250);
        cellStyle.setFont(font);
        // 獲取工作表最後一行
        HSSFRow lastRow = sheet.createRow((short) (sheet.getLastRowNum() + 1));
        HSSFCell sumCell = lastRow.createCell(0);

        sumCell.setCellValue(new HSSFRichTextString("合計"));
        sumCell.setCellStyle(cellStyle);
        // 合併最後一行的第零列-最後一行的第一列
        sheet.addMergedRegion(new Region(sheet.getLastRowNum(), (short) 0,
                sheet.getLastRowNum(), (short) colSum));// 指定合併區域

        for (int i = 2; i < (cellValue.length + 2); i++) {
            // 定義最後一行的第三列
            sumCell = lastRow.createCell(i);
            sumCell.setCellStyle(cellStyle);
            // 定義數組從0開始。
            sumCell.setCellValue(new HSSFRichTextString(cellValue[i - 2]));
        }
    }

    /**
     * 輸入EXCEL文件
     *
     * @param fileName
     *            文件名
     */
    public void outputExcel(String fileName) {
        FileOutputStream fos = null;
        try {
            fos = new FileOutputStream(new File(fileName));
            wb.write(fos);
            fos.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    /**
     * @return the sheet
     */
    public HSSFSheet getSheet() {
        return sheet;
    }

    /**
     * @param sheet
     *            the sheet to set
     */
    public void setSheet(HSSFSheet sheet) {
        this.sheet = sheet;
    }

    /**
     * @return the wb
     */
    public HSSFWorkbook getWb() {
        return wb;
    }

    /**
     * @param wb
     *            the wb to set
     */
    public void setWb(HSSFWorkbook wb) {
        this.wb = wb;
    }
}

3.這裏只使用了Servlet，可以根據需要來使用在不同的地方。

[java] view plaincopy
package com.jeelon.exportExcle;

import java.io.BufferedOutputStream;
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.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;

@SuppressWarnings("serial")
public class OutputExcel extends HttpServlet {

    protected void doGet(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        this.doPost(request, response);
    }

    protected void doPost(HttpServletRequest request,
            HttpServletResponse response) throws ServletException, IOException {
        System.out.println("helloworld");
        List<Student> list = new ArrayList<Student>();

        Student student1 = new Student(1, "Jeelon", 21, "貴陽市 ", "15085943968",
                '男');
        Student student2 = new Student(2, "fengxu", 21, "貴陽市 ", "15085943968",
                '男');
        Student student3 = new Student(3, "jerry", 21, "貴陽市 ", "15085943968",
                '男');
        Student student4 = new Student(4, "merry", 21, "貴陽市 ", "15085943968",
                '男');
        Student student5 = new Student(5, "lariiy", 21, "貴陽市 ", "15085943968",
                '男');
        Student student6 = new Student(6, "monr", 21, "貴陽市 ", "15085943968",
                '男');
        Student student7 = new Student(7, "join", 21, "貴陽市 ", "15085943968",
                '男');
        Student student8 = new Student(8, "jay chou", 21, "貴陽市 ",
                "15085943968", '男');
        Student student9 = new Student(9, "laonb", 21, "貴陽市 ", "15085943968",
                '男');
        Student student0 = new Student(0, "mudg", 21, "貴陽市 ", "15085943968",
                '男');

        list.add(student1);
        list.add(student2);
        list.add(student3);
        list.add(student4);
        list.add(student5);
        list.add(student6);
        list.add(student7);
        list.add(student8);
        list.add(student9);
        list.add(student0);

        String fileName = "導出Excel.xls";
        fileName = new String(fileName.getBytes("GBK"), "iso8859-1");
        response.reset();
        response.setHeader("Content-Disposition", "attachment;filename="
                + fileName);// 指定下載的文件名
        response.setContentType("application/vnd.ms-excel");
        response.setHeader("Pragma", "no-cache");
        response.setHeader("Cache-Control", "no-cache");
        response.setDateHeader("Expires", 0);
        OutputStream output = response.getOutputStream();
        BufferedOutputStream bufferedOutPut = new BufferedOutputStream(output);

        // 定義單元格報頭
        String worksheetTitle = "Excel導出Student信息";

        HSSFWorkbook wb = new HSSFWorkbook();

        // 創建單元格樣式
        HSSFCellStyle cellStyleTitle = wb.createCellStyle();
        // 指定單元格居中對齊
        cellStyleTitle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 指定單元格垂直居中對齊
        cellStyleTitle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 指定當單元格內容顯示不下時自動換行
        cellStyleTitle.setWrapText(true);
        // ------------------------------------------------------------------
        HSSFCellStyle cellStyle = wb.createCellStyle();
        // 指定單元格居中對齊
        cellStyle.setAlignment(HSSFCellStyle.ALIGN_CENTER);
        // 指定單元格垂直居中對齊
        cellStyle.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);
        // 指定當單元格內容顯示不下時自動換行
        cellStyle.setWrapText(true);
        // ------------------------------------------------------------------
        // 設置單元格字體
        HSSFFont font = wb.createFont();
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        font.setFontName("宋體");
        font.setFontHeight((short) 200);
        cellStyleTitle.setFont(font);

        // 工作表名
        String id = "id";
        String name = "name";
        String age = "age";
        String address = "address";
        String tel = "tel";
        String sex = "sex";

        HSSFSheet sheet = wb.createSheet();
        ExportExcel exportExcel = new ExportExcel(wb, sheet);
        // 創建報表頭部
        exportExcel.createNormalHead(worksheetTitle, 6);
        // 定義第一行
        HSSFRow row1 = sheet.createRow(1);
        HSSFCell cell1 = row1.createCell(0);

        //第一行第一列

        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(id));
        //第一行第er列
        cell1 = row1.createCell(1);
        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(name));

        //第一行第san列
        cell1 = row1.createCell(2);
        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(age));

        //第一行第si列
        cell1 = row1.createCell(3);
        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(address));

        //第一行第wu列
        cell1 = row1.createCell(4);
        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(tel));

        //第一行第liu列
        cell1 = row1.createCell(5);
        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(sex));

        //第一行第qi列
        cell1 = row1.createCell(6);
        cell1.setCellStyle(cellStyleTitle);
        cell1.setCellValue(new HSSFRichTextString(sex));


        //定義第二行
        HSSFRow row = sheet.createRow(2);
        HSSFCell cell = row.createCell(1);
        Student student = new Student();
        for (int i = 0; i < list.size(); i++) {
            student = list.get(i);
            row = sheet.createRow(i + 2);

            cell = row.createCell(0);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(new HSSFRichTextString(student.getId() + ""));

            cell = row.createCell(1);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(new HSSFRichTextString(student.getName()));

            cell = row.createCell(2);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(new HSSFRichTextString(student.getAge() + ""));

            cell = row.createCell(3);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(new HSSFRichTextString(student.getAddress() + ""));

            cell = row.createCell(4);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(new HSSFRichTextString(student.getAddress()));

            cell = row.createCell(5);
            cell.setCellStyle(cellStyle);
            cell.setCellValue(new HSSFRichTextString(student.getTel()));

            cell = row.createCell(6);
            cell.setCellValue(new HSSFRichTextString(String.valueOf(student.getSex())));
            cell.setCellStyle(cellStyle);

        }
        try {
            bufferedOutPut.flush();
            wb.write(bufferedOutPut);
            bufferedOutPut.close();
        } catch (IOException e) {
            e.printStackTrace();
            System.out.println("Output   is   closed ");
        } finally {
            list.clear();
        }
    }
}

4.由於使用的是Servlet ，當然還有配置Servlet哦這裏就不再說樂吧相信他對於你是so easy！

5.前臺jsp頁面：

[html] view plaincopy
導出數據到excel
        <form action="excel" method="post">
            <input type="submit" name="" value="導出">
        </form>

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