POI 匯出Excel

小さいです哥發表於2015-05-05
Excel
package east.mvc.utils;

import java.io.*;
import java.lang.reflect.*;
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.regex.*;

import javax.swing.JOptionPane;

import org.apache.poi.hssf.usermodel.*;

import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.ss.formula.functions.T;
import org.apache.poi.ss.usermodel.Cell;

public class ExportExcel<T> {
    public void exportExcel(Collection<T> dataset, OutputStream out) {
        exportExcel("Sheet1", null, dataset, out, "yyyy-MM-dd");
    }

    public void exportExcel(String[] headers, Map dataset, OutputStream out) {
        exportExcel("Sheet2", headers, dataset, out, "yyyy-MM-dd");
    }

    public void exportExcel(String[] headers, Collection<T> dataset,
            OutputStream out) {
        exportExcel("Sheet3", headers, dataset, out, "yyyy-MM-dd");
    }

    public void exportExcel(String[] headers, Collection<T> dataset,
            OutputStream out, String pattern) {
        exportExcel("Sheet4", headers, dataset, out, pattern);
    }

    /**
     * 這是一個通用的方法，利用了JAVA的反射機制，可以將放置在JAVA集合中並且符號一定條件的資料以EXCEL 的形式輸出到指定IO裝置上
     * 
     * @param title
     *            表格標題名
     * @param headers
     *            表格屬性列名陣列
     * @param dataset
     *            需要顯示的資料集合,集合中一定要放置符合javabean風格的類的物件。此方法支援的
     *            javabean屬性的資料型別有基本資料型別及String,Date,byte[](圖片資料)
     * @param out
     *            與輸出裝置關聯的流物件，可以將EXCEL文件匯出到本地檔案或者網路中
     * @param pattern
     *            如果有時間資料，設定輸出格式。預設為"yyy-MM-dd"
     */
    @SuppressWarnings("unchecked")
    public void exportExcel(String title, String[] headers,
            Collection<T> dataset, OutputStream out, String pattern) {
        // 宣告一個工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一個表格
        HSSFSheet sheet = workbook.createSheet(title);
        // 設定表格預設列寬度為15個位元組
        sheet.setDefaultColumnWidth((short) 15);
        // 生成一個樣式
        HSSFCellStyle style = workbook.createCellStyle();
        // 設定這些樣式
        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);
        // 生成一個字型
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.VIOLET.index);
        font.setFontHeightInPoints((short) 12);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字型應用到當前的樣式
        style.setFont(font);
        // 生成並設定另一個樣式
        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);
        // 生成另一個字型
        HSSFFont font2 = workbook.createFont();
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        // 把字型應用到當前的樣式
        style2.setFont(font2);

        // 宣告一個畫圖的頂級管理器
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定義註釋的大小和位置,詳見文件
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
                0, 0, 0, (short) 4, 2, (short) 6, 5));
        // 設定註釋內容
        comment.setString(new HSSFRichTextString("可以在POI中新增註釋！"));
        // 設定註釋作者，當滑鼠移動到單元格上是可以在狀態列中看到該內容.
        comment.setAuthor("leno");

        // 產生表格標題行
        HSSFRow row = sheet.createRow(0);
        for (short i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            cell.setCellStyle(style);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }

        // 遍歷集合資料，產生資料行
        Iterator<T> it = dataset.iterator();
        int index = 0;
        while (it.hasNext()) {
            index++;
            row = sheet.createRow(index);
            T t = (T) it.next();
            // map.put("dataset", dataset);
            // 利用反射，根據javabean屬性的先後順序，動態呼叫getXxx()方法得到屬性值
            // Field[] fields = t.getClass().getDeclaredFields();
            Field[] fields = t.getClass().getDeclaredFields();
            for (short i = 0; i < fields.length; i++) {
                HSSFCell cell = row.createCell(i);

                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[] {});
                    if (value == null) {
                        System.out.println("kong value");
                        continue;
                    }
                    // 判斷值的型別後進行強制型別轉換
                    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[]) {
                        // 有圖片時，設定行高為60px;
                        row.setHeightInPoints(60);
                        // 設定圖片所在列寬度為80px,注意這裡單位的一個換算
                        sheet.setColumnWidth(i, (short) (35.7 * 80));
                        // sheet.autoSizeColumn(i);
                        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 {
                        // 其它資料型別都當作字串簡單處理
                        textValue = value.toString();
                    }
                    // 如果不是圖片資料，就利用正規表示式判斷textValue是否全部由數字組成
                    if (textValue != null) {
                        Pattern p = Pattern.compile("^//d+(//.//d+)?$");
                        Matcher matcher = p.matcher(textValue);
                        if (matcher.matches()) {
                            // 是數字當作double處理
                            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 (SecurityException e) {
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                } finally {
                    // 清理資源
                }
            }
        }
        try {
            workbook.write(out);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    public void exportExcel(String title, String[] headers,
            Map<String, Object> dataset, OutputStream out, String pattern) {
        // 宣告一個工作薄
        HSSFWorkbook workbook = new HSSFWorkbook();
        // 生成一個表格
        HSSFSheet sheet = workbook.createSheet(title);
        // 設定表格預設列寬度為15個位元組
        sheet.setDefaultColumnWidth((short) 15);
        // 生成一個樣式
        HSSFCellStyle style = workbook.createCellStyle();
        // 設定這些樣式
        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);
        // 生成一個字型
        HSSFFont font = workbook.createFont();
        font.setColor(HSSFColor.VIOLET.index);
        font.setFontHeightInPoints((short) 12);
        font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
        // 把字型應用到當前的樣式
        style.setFont(font);
        // 生成並設定另一個樣式
        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);
        // 生成另一個字型
        HSSFFont font2 = workbook.createFont();
        font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
        // 把字型應用到當前的樣式
        style2.setFont(font2);

        // 宣告一個畫圖的頂級管理器
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
        // 定義註釋的大小和位置,詳見文件
        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
                0, 0, 0, (short) 4, 2, (short) 6, 5));
        // 設定註釋內容
        comment.setString(new HSSFRichTextString("可以在POI中新增註釋！"));
        // 設定註釋作者，當滑鼠移動到單元格上是可以在狀態列中看到該內容.
        comment.setAuthor("leno");

        // 產生表格標題行
        HSSFRow row = sheet.createRow(0);
        for (short i = 0; i < headers.length; i++) {
            HSSFCell cell = row.createCell(i);
            cell.setCellStyle(style);
            HSSFRichTextString text = new HSSFRichTextString(headers[i]);
            cell.setCellValue(text);
        }

        // 遍歷集合資料，產生資料行
        Collection a = dataset.values();
        Iterator it = a.iterator();
        int index = 0;
        while (it.hasNext()) {
            index++;
            row = sheet.createRow(index);
            T t = (T) it.next();
            // map.put("dataset", dataset);
            // 利用反射，根據javabean屬性的先後順序，動態呼叫getXxx()方法得到屬性值
            // Field[] fields = t.getClass().getDeclaredFields();
            Field[] fields = t.getClass().getDeclaredFields();
            for (short i = 0; i < fields.length; i++) {
                HSSFCell cell = row.createCell(i);

                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[] {});
                    if (value == null) {
                        System.out.println("kong value");
                        continue;
                    }
                    // 判斷值的型別後進行強制型別轉換
                    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[]) {
                        // 有圖片時，設定行高為60px;
                        row.setHeightInPoints(60);
                        // 設定圖片所在列寬度為80px,注意這裡單位的一個換算
                        sheet.setColumnWidth(i, (short) (35.7 * 80));
                        // sheet.autoSizeColumn(i);
                        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 {
                        // 其它資料型別都當作字串簡單處理
                        textValue = value.toString();
                    }
                    // 如果不是圖片資料，就利用正規表示式判斷textValue是否全部由數字組成
                    if (textValue != null) {
                        Pattern p = Pattern.compile("^//d+(//.//d+)?$");
                        Matcher matcher = p.matcher(textValue);
                        if (matcher.matches()) {
                            // 是數字當作double處理
                            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 (SecurityException e) {
                    e.printStackTrace();
                } catch (NoSuchMethodException e) {
                    e.printStackTrace();
                } catch (IllegalArgumentException e) {
                    e.printStackTrace();
                } catch (IllegalAccessException e) {
                    e.printStackTrace();
                } catch (InvocationTargetException e) {
                    e.printStackTrace();
                } finally {
                    // 清理資源
                }
            }
        }
        try {
            workbook.write(out);
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

    private String ConvertCellStr(Cell cell, String cellStr) {
        switch (cell.getCellType()) {
        case Cell.CELL_TYPE_STRING:
            cellStr = cell.getStringCellValue().toString();
            break;
        case Cell.CELL_TYPE_BOOLEAN:
            cellStr = String.valueOf(cell.getBooleanCellValue());
            break;
        }
        return null;
    }

    public static void main(String[] args) {
        // 測試學生
        ExportExcel<Userinfos> ex = new ExportExcel<Userinfos>();
        String[] headers = { "學號", "年齡", "姓名" };
        List<Userinfos> dataset = new ArrayList<Userinfos>();
        dataset.add(new Userinfos("11", 101, "11"));
        dataset.add(new Userinfos("11", 102, "11"));
        dataset.add(new Userinfos("11", 103, "11"));
        // 測試圖書
        try {
            OutputStream out = new FileOutputStream("E://a.xls");
            ex.exportExcel(headers, dataset, out);
            out.close();
            JOptionPane.showMessageDialog(null, "匯出成功!");
            System.out.println("excel匯出成功！");
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }

}
@RequestMapping("/exportExcel")
    public String exportExcel(HttpServletRequest request,
            HttpServletResponse response) throws IOException {
        response.setContentType("octets/stream");
        response.addHeader("Content-Disposition",
                "attachment;filename=test.xls");

        SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
        String filename = format.format(new Date().getTime()) + ".xls";
        response.setContentType("application/ms-excel;charset=UTF-8");
        response.setHeader("Content-Disposition", "attachment;filename="
                .concat(String.valueOf(URLEncoder.encode(filename, "UTF-8"))));
        //
        String[] headers = { "學號", "年齡", "姓名" };
        List<Userinfos> dataset = new ArrayList<Userinfos>();
        dataset.add(new Userinfos("11", 101, "11"));
        dataset.add(new Userinfos("11", 102, "11"));
        dataset.add(new Userinfos("11", 103, "11"));
        //
        OutputStream out = response.getOutputStream();
        ExportExcel<Userinfos> ex = new ExportExcel<Userinfos>();
        //
        try {
            ex.exportExcel(headers, dataset, out);
            System.out.println("success");
        } catch (Exception e) {
            e.printStackTrace();
            System.out.println("error");
        } finally {
            out.close();
        }
        return null;
    }

function exportExcelFun() {
var url="${ctx}/mapStatHistory/exportExcel";
window.open(url);
}

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