Java 工具類 - 使用POI以及反射實現導出Excel的功能

使用起來十分簡單,只需要定義實體類即可,注意一點,列的順序必須與實體類字段的順序一致。

package com.tgb.hz.doc;

import java.io.BufferedInputStream;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.regex.Matcher;
import java.util.regex.Pattern;

import javax.swing.JOptionPane;

import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFCellStyle;
import org.apache.poi.hssf.usermodel.HSSFClientAnchor;
import org.apache.poi.hssf.usermodel.HSSFFont;
import org.apache.poi.hssf.usermodel.HSSFPatriarch;
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.usermodel.ClientAnchor.AnchorType;

import com.tgb.hz.entity.Book;
import com.tgb.hz.entity.Student;

/** 
 * 利用開源組件POI3.0.2動態導出EXCEL文檔 轉載時請保留以下信息,註明出處! 
 *  
 * @author hezhao
 * @version v1.0 
 * @param <T> 
 *            應用泛型,代表任意一個符合javabean風格的類 
 *            注意這裏爲了簡單起見,boolean型的屬性xxx的get器方式爲getXxx(),而不是isXxx() 
 *            byte[]表jpg格式的圖片數據 
 */  
public class ExportExcelByPoi<T>  
{  

    //%%%%%%%%-------字段部分 開始----------%%%%%%%%%  
    /** 
     * 標題欄背景顏色 默認白色
     */
    private short titleBackColor = HSSFColor.WHITE.index;  

    /** 
     * 標題欄文字顏色 默認黑色
     */
    private short titleFontColor = HSSFColor.BLACK.index;

    /** 
     * 標題欄文字大小 默認12
     */
    private short titleFontSize = 12;

    /**
     * 標題欄文字是否粗體 默認true
     */
    private boolean titleFontBold = true;

    /**
     * 標題欄高度 默認13
     */
    private short titleHeight = 13;

    /** 
     * 數據欄背景顏色 默認白色
     */  
    private short columnBackColor = HSSFColor.WHITE.index;  

    /** 
     * 數據欄文字顏色 默認黑色
     */  
    private short columnFontColor = HSSFColor.BLACK.index;

    /** 
     * 數據欄文字大小 默認10
     */
    private short columnFontSize = 10;

    /**
     * 數據欄文字是否粗體 默認false
     */
    private boolean columnFontBold = false;

    /**
     * 數據欄高度 默認13
     */
    private short columnHeight = 13;

    /** 
     * 表格默認寬度 15個字節
     */  
    private short widthDefault = 15;  

    /** 
     * 圖片高度  默認60
     */  
    private short imageHeight = 60;  

    /** 
     * 是否有框線
     */  
    private boolean needBorder = true;  

    /**
     * 對齊方式 默認中間對齊
     */
    private short align = HSSFCellStyle.ALIGN_CENTER;

    /**
     * 日期格式化
     */
    private String pattern = "yyyy-MM-dd";

    /**
     * 表頭 可爲空
     */
    private String[] headers;

    /**
     * 數據
     */
    private Collection<T> dataset;

    /**
     * 輸出流
     */
    private OutputStream out;

    //%%%%%%%%-------字段部分 結束----------%%%%%%%%%  



    public ExportExcelByPoi(){  

    } 


    /**
     * 生成Excel
     * @param sheetName 工作表名稱
     * @param widths 寬度集合   當需要自定義某一列的寬度時,需要把那個字段名作爲鍵,然後寬度作爲值存入widths,其餘未存入的按照默認寬度處理
     */
    public void createExcel(String sheetName,Map<String,Integer> widths)  
    {  
        create(sheetName,widths);  
    }  

    /**
     * 生成Excel
     * @param sheetName 工作表名稱
     */
    public void createExcel(String sheetName)  
    {  
        create(sheetName,null);  
    }  


    /** 
     * 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數據以EXCEL 的形式輸出到指定IO設備上 
     *  
     * @param sheetName 
     *            表格標題名 
     * @param headers 
     *            表格屬性列名數組 
     * @param dataset 
     *            需要顯示的數據集合,集合中一定要放置符合javabean風格的類的對象。此方法支持的 
     *            javabean屬性的數據類型有基本數據類型及String,Date,byte[](圖片數據) 
     * @param out 
     *            與輸出設備關聯的流對象,可以將EXCEL文檔導出到本地文件或者網絡中 
     * @param pattern 
     *            如果有時間數據,設定輸出格式。默認爲"yyyy-MM-dd" 
     */  
    @SuppressWarnings("unchecked")  
    private void create(String sheetName,Map<String,Integer> widths)  
    {  
        // 聲明一個工作薄  
        HSSFWorkbook workbook = new HSSFWorkbook();  
        // 生成一個表格  
        HSSFSheet sheet = workbook.createSheet(sheetName);  
        // 設置表格默認列寬度 
        sheet.setDefaultColumnWidth(this.widthDefault);  

        // 標題欄樣式  
        HSSFCellStyle style = createTitleStyle(workbook);  
        //數據欄樣式
        HSSFCellStyle style2 = createColumnStyle(workbook);  

        // 聲明一個畫圖的頂級管理器  
        HSSFPatriarch patriarch = sheet.createDrawingPatriarch();  
        // 定義註釋的大小和位置,詳見文檔  
//        HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,  
//                0, 0, 0, (short) 4, 2, (short) 6, 5));  
        // 設置註釋內容  
//        comment.setString(new HSSFRichTextString("可以在POI中添加註釋!"));  
        // 設置註釋作者,當鼠標移動到單元格上是可以在狀態欄中看到該內容.  
//        comment.setAuthor("leno");  

        // 產生表格標題行  
        HSSFRow row = sheet.createRow(0);  
        row.setHeight((short) (titleHeight * 20));
        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);  
        }  

        // 遍歷集合數據,產生數據行  
        Iterator<T> it = dataset.iterator();  
        int index = 0;  
        while (it.hasNext())  
        {  
            index++;  
            row = sheet.createRow(index);  
            row.setHeight((short) (columnHeight * 20));

            T t = (T) it.next();  
            // 利用反射,根據javabean屬性的先後順序,動態調用getXxx()方法得到屬性值  
            Field[] fields = t.getClass().getDeclaredFields();  
            for (short i = 0; i < fields.length; i++)  
            {  
                HSSFCell cell = row.createCell(i);  
                cell.setCellStyle(style2);  
                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[]{});  

                    // 判斷值的類型後進行強制類型轉換  
                    String textValue = null;  

//                    if (value instanceof Integer) {
//                      int intValue = (Integer) value;
//                      cell.setCellValue(intValue);
//                  } else if (value instanceof Float) {
//                      float fValue = (Float) value;
//                      textValue = new HSSFRichTextString(String.valueOf(fValue));
//                      cell.setCellValue(textValue);
//                  } else if (value instanceof Double) {
//                      double dValue = (Double) value;
//                      textValue = new HSSFRichTextString(String.valueOf(dValue));
//                      cell.setCellValue(textValue);
//                  } else if (value instanceof Long) {
//                      long longValue = (Long) value;
//                      cell.setCellValue(longValue);
//                  }
//                  else
//                    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[])  
                    {  
                        int width = 80;
                        //處理自定義寬度
                        if(widths!=null && widths.containsKey(fieldName)){
                            width = widths.get(fieldName);
                        }

                        // 有圖片時,設置行高爲60px;  
                        row.setHeightInPoints(this.imageHeight);  
                        // 設置圖片所在列寬度爲80px,注意這裏單位的一個換算  
                        sheet.setColumnWidth(i, (short) (35.7 * width * 7.666));  
                        // sheet.autoSizeColumn(i);  
                        byte[] bsValue = (byte[]) value;  
                        HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,  
                                1023, 255, (short) 6, index, (short) 6, index);  
                        anchor.setAnchorType(AnchorType.MOVE_DONT_RESIZE);  // AnchorType.MOVE_DONT_RESIZE = 2
                        patriarch.createPicture(anchor, workbook.addPicture(  
                                bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));  
                    }  
                    else  
                    {  
                        // 其它數據類型都當作字符串簡單處理  
                        textValue = value.toString();  
                    }  
                    // 如果不是圖片數據  
                    if (textValue != null)  
                    {  
                        //處理自定義寬度
                        if(widths!=null && widths.containsKey(fieldName)){
                            int width = widths.get(fieldName);
                            // 設置所在列寬度爲 width px,注意這裏單位的一個換算  
                            sheet.setColumnWidth(i, (short) (35.7 * width * 7.666));  
                        }


                        //利用正則表達式判斷textValue是否全部由數字組成
                        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);  
                            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();  
        }  
    }


    /**
     *數據欄樣式
     * @param workbook
     * @return
     */
    private HSSFCellStyle createColumnStyle(HSSFWorkbook workbook) {
        // 生成並設置另一個樣式  
        HSSFCellStyle style2 = workbook.createCellStyle();  
        style2.setFillForegroundColor(this.columnBackColor);  
        style2.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  

      //是否需要框線
        if(this.needBorder){
            style2.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
            style2.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
            style2.setBorderRight(HSSFCellStyle.BORDER_THIN);  
            style2.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        }else{
            style2.setBorderBottom(HSSFCellStyle.BORDER_NONE);  
            style2.setBorderLeft(HSSFCellStyle.BORDER_NONE);  
            style2.setBorderRight(HSSFCellStyle.BORDER_NONE);  
            style2.setBorderTop(HSSFCellStyle.BORDER_NONE);  
        }
        style2.setAlignment(this.align);  
        style2.setVerticalAlignment(HSSFCellStyle.VERTICAL_CENTER);  
        // 生成另一個字體  
        HSSFFont font2 = workbook.createFont();  
        font2.setColor(this.columnFontColor);  
        font2.setFontHeightInPoints(this.columnFontSize);  
        if(this.columnFontBold){
            font2.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);  
        }else{
            font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);  
        }
        // 把字體應用到當前的樣式  
        style2.setFont(font2);
        return style2;
    }


    /**
     * 標題欄樣式
     * @param workbook
     * @return
     */
    private HSSFCellStyle createTitleStyle(HSSFWorkbook workbook) {
        // 生成一個樣式  
        HSSFCellStyle style = workbook.createCellStyle();  
        // 設置這些樣式  
        style.setFillForegroundColor(this.titleBackColor);  
        style.setFillPattern(HSSFCellStyle.SOLID_FOREGROUND);  

        //是否需要框線
        if(this.needBorder){
            style.setBorderBottom(HSSFCellStyle.BORDER_THIN);  
            style.setBorderLeft(HSSFCellStyle.BORDER_THIN);  
            style.setBorderRight(HSSFCellStyle.BORDER_THIN);  
            style.setBorderTop(HSSFCellStyle.BORDER_THIN);  
        }else{
            style.setBorderBottom(HSSFCellStyle.BORDER_NONE);  
            style.setBorderLeft(HSSFCellStyle.BORDER_NONE);  
            style.setBorderRight(HSSFCellStyle.BORDER_NONE);  
            style.setBorderTop(HSSFCellStyle.BORDER_NONE);  
        }
        //對齊方式
        style.setAlignment(this.align);  
        // 生成一個字體  
        HSSFFont font = workbook.createFont();  
        font.setColor(this.titleFontColor);  
        font.setFontHeightInPoints(this.titleFontSize);  
        if(this.titleFontBold){
            font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);  
        }else{
            font.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);  
        }
        // 把字體應用到當前的樣式  
        style.setFont(font);
        return style;
    }  

    public static void main(String[] args)  
    {  
        // 測試學生  
        ExportExcelByPoi<Student> ex = new ExportExcelByPoi<Student>();  

        String[] headers = { "學號", "姓名", "年齡", "性別", "出生日期" };  
        List<Student> dataset = new ArrayList<Student>();  
        dataset.add(new Student(10000001, "張三", 20, true, new Date()));  
        dataset.add(new Student(20000002, "李四", 24, false, new Date()));  
        dataset.add(new Student(30000003, "王五", 22, true, new Date()));  

        // 測試圖書  
        ExportExcelByPoi<Book> ex2 = new ExportExcelByPoi<Book>();  
        String[] headers2 = { "圖書編號", "圖書名稱", "圖書作者", "圖書價格", "圖書ISBN", "圖書出版社", "封面圖片" };  
        List<Book> dataset2 = new ArrayList<Book>();  

        try  
        {  
            BufferedInputStream bis = new BufferedInputStream(  
                    new FileInputStream("D://barcode.png"));  
            byte[] buf = new byte[bis.available()];  
            while ((bis.read(buf)) != -1)  
            {  
                //  
            }  
            dataset2.add(new Book(1, "jsp", "leno", 300.33f, "1234567",  
                    "清華出版社", buf));  
            dataset2.add(new Book(2, "java編程思想", "brucl", 300.33f, "1234567",  
                    "陽光出版社", buf));  
            dataset2.add(new Book(3, "DOM藝術", "lenotang", 300.33f, "1234567",  
                    "清華出版社", buf));  
            dataset2.add(new Book(4, "c++經典", "leno", 400.33f, "1234567",  
                    "清華出版社", buf));  
            dataset2.add(new Book(5, "c#入門", "leno", 300.33f, "1234567",  
                    "湯春秀出版社", buf));  

            OutputStream out = new FileOutputStream("E://a.xls");  
            OutputStream out2 = new FileOutputStream("E://b.xls");  

            Map<String,Integer> widths = new HashMap<String, Integer>();
            widths.put("isbn", 15);
            widths.put("preface", 30);

            ex.setDataset(dataset);
            ex.setHeaders(headers);
            ex.setOut(out);
            ex.setAlign(HSSFCellStyle.ALIGN_LEFT);
            ex.setColumnFontColor(HSSFColor.RED.index);
            ex.setNeedBorder(false);
            ex.setTitleBackColor(HSSFColor.BLUE_GREY.index);
            ex.setWidthDefault(20);
            ex.setTitleFontSize(16);
            ex.setTitleFontBold(false);
            ex.setColumnFontSize(14);


            ex2.setDataset(dataset2);
            ex2.setHeaders(headers2);
            ex2.setOut(out2);
            ex2.setImageHeight(80);

            ex.createExcel("學生信息");  
            ex2.createExcel("書籍信息",widths);  
            out.close();  
            out2.close();  
            JOptionPane.showMessageDialog(null, "導出成功!");  
            System.out.println("excel導出成功!");  
        } catch (FileNotFoundException e) {  
            e.printStackTrace();  
        } catch (IOException e) {  
            e.printStackTrace();  
        }  
    }


    public short getTitleBackColor() {
        return titleBackColor;
    }


    /**
     * 標題欄背景顏色 默認白色  HSSFColor.WHITE.index
     * @param titleBackColor 
     */
    public void setTitleBackColor(short titleBackColor) {
        this.titleBackColor = titleBackColor;
    }


    public short getTitleFontColor() {
        return titleFontColor;
    }


    /**
     * 標題欄文字顏色 默認黑色 HSSFColor.BLACK.index
     * @param titleFontColor 
     */
    public void setTitleFontColor(short titleFontColor) {
        this.titleFontColor = titleFontColor;
    }


    public short getTitleFontSize() {
        return titleFontSize;
    }


    /**
     * 標題欄文字大小 默認 12
     * @param titleFontSize
     */
    public void setTitleFontSize(int titleFontSize) {
        this.titleFontSize = (short)titleFontSize;
    }


    public boolean getTitleFontBold() {
        return titleFontBold;
    }


    /**
     * 標題欄文字是否粗體 默認true
     * @param titleFontBold
     */
    public void setTitleFontBold(boolean titleFontBold) {
        this.titleFontBold = titleFontBold;
    }


    public short getColumnBackColor() {
        return columnBackColor;
    }


    /**
     * 數據欄背景顏色 默認白色 HSSFColor.WHITE.index
     * @param columnBackColor 
     */
    public void setColumnBackColor(short columnBackColor) {
        this.columnBackColor = columnBackColor;
    }


    public short getColumnFontColor() {
        return columnFontColor;
    }


    /**
     * 數據欄文字顏色 默認黑色 HSSFColor.BLACK.index
     * @param columnFontColor 
     */
    public void setColumnFontColor(short columnFontColor) {
        this.columnFontColor = columnFontColor;
    }


    public short getColumnFontSize() {
        return columnFontSize;
    }


    /**
     * 數據欄文字大小 默認10
     * @param columnFontSize
     */
    public void setColumnFontSize(int columnFontSize) {
        this.columnFontSize = (short)columnFontSize;
    }


    public boolean getColumnFontBold() {
        return columnFontBold;
    }


    /**
     * 數據欄文字是否粗體 默認false
     * @param columnFontBold
     */
    public void setColumnFontBold(boolean columnFontBold) {
        this.columnFontBold = columnFontBold;
    }


    public short getWidthDefault() {
        return widthDefault;
    }


    /**
     * 表格默認寬度 15個字節
     * @param widthDefault
     */
    public void setWidthDefault(int widthDefault) {
        this.widthDefault = (short)widthDefault;
    }


    public boolean isNeedBorder() {
        return needBorder;
    }


    /**
     * 是否有框線
     * @param needBorder
     */
    public void setNeedBorder(boolean needBorder) {
        this.needBorder = needBorder;
    }


    public short getAlign() {
        return align;
    }


    /**
     * 對齊方式 默認中間對齊 HSSFCellStyle.ALIGN_CENTER
     * @param align
     */
    public void setAlign(short align) {
        this.align = align;
    }


    public String getPattern() {
        return pattern;
    }


    /**
     * 日期格式化
     * @param pattern
     */
    public void setPattern(String pattern) {
        this.pattern = pattern;
    }


    public String[] getHeaders() {
        return headers;
    }


    /**
     * 標題欄
     * @param headers
     */
    public void setHeaders(String[] headers) {
        this.headers = headers;
    }


    public Collection<T> getDataset() {
        return dataset;
    }


    /**
     * 表格數據集合
     * @param dataset
     */
    public void setDataset(Collection<T> dataset) {
        this.dataset = dataset;
    }


    public OutputStream getOut() {
        return out;
    }


    /**
     * 與輸出設備關聯的流對象,可以將EXCEL文檔導出到本地文件或者網絡中 
     * @param out
     */
    public void setOut(OutputStream out) {
        this.out = out;
    }


    public short getImageHeight() {
        return imageHeight;
    }

    /**
     * 圖片高度 默認60
     * @param imageHeight
     */
    public void setImageHeight(int imageHeight) {
        this.imageHeight = (short)imageHeight;
    }

    public short getTitleHeight() {
        return titleHeight;
    }

    /**
     * 標題欄高度 默認13
     * @param titleHeight
     */
    public void setTitleHeight(int titleHeight) {
        this.titleHeight = (short) titleHeight;
    }

    public short getColumnHeight() {
        return columnHeight;
    }

    /**
     * 數據欄高度 默認13
     * @param columnHeight
     */
    public void setColumnHeight(int columnHeight) {
        this.columnHeight = (short) columnHeight;
    }

}  

提供一下實體類供測試使用


Book

package com.tgb.hz.entity;

/**
 *         ┏┓   ┏┓+ +
 *        ┏┛┻━━━┛┻┓ + +
 *        ┃       ┃
 *        ┃   ━   ┃ ++ + + +
 *        ████━████ ┃+
 *        ┃       ┃ +
 *        ┃   ┻   ┃
 *        ┃       ┃ + +
 *        ┗━┓   ┏━┛
 *          ┃   ┃
 *          ┃   ┃ + + + +
 *          ┃   ┃    Code is far away from bug with the animal protecting
 *          ┃   ┃ +     神獸保佑,代碼無bug
 *          ┃   ┃
 *          ┃   ┃  +
 *          ┃    ┗━━━┓ + +
 *          ┃        ┣┓
 *          ┃        ┏┛
 *          ┗┓┓┏━┳┓┏┛ + + + +
 *           ┃┫┫ ┃┫┫
 *           ┗┻┛ ┗┻┛+ + + +
 * <p>
 * Created by hezhao on 2018-08-16 16:33
 */
public class Book {
    private int bookId;
    private String name;
    private String author;
    private float price;
    private String isbn;
    private String pubName;
    private byte[] preface;

    public Book() {
    }

    public Book(int bookId, String name, String author, float price,
            String isbn, String pubName, byte[] preface) {
        this.bookId = bookId;
        this.name = name;
        this.author = author;
        this.price = price;
        this.isbn = isbn;
        this.pubName = pubName;
        this.preface = preface;
    }

    public int getBookId() {
        return bookId;
    }

    public void setBookId(int bookId) {
        this.bookId = bookId;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public String getAuthor() {
        return author;
    }

    public void setAuthor(String author) {
        this.author = author;
    }

    public float getPrice() {
        return price;
    }

    public void setPrice(float price) {
        this.price = price;
    }

    public String getIsbn() {
        return isbn;
    }

    public void setIsbn(String isbn) {
        this.isbn = isbn;
    }

    public String getPubName() {
        return pubName;
    }

    public void setPubName(String pubName) {
        this.pubName = pubName;
    }

    public byte[] getPreface() {
        return preface;
    }

    public void setPreface(byte[] preface) {
        this.preface = preface;
    }
}

Student

package com.tgb.hz.entity;

import java.util.Date;

/**
 *         ┏┓   ┏┓+ +
 *        ┏┛┻━━━┛┻┓ + +
 *        ┃       ┃
 *        ┃   ━   ┃ ++ + + +
 *        ████━████ ┃+
 *        ┃       ┃ +
 *        ┃   ┻   ┃
 *        ┃       ┃ + +
 *        ┗━┓   ┏━┛
 *          ┃   ┃
 *          ┃   ┃ + + + +
 *          ┃   ┃    Code is far away from bug with the animal protecting
 *          ┃   ┃ +     神獸保佑,代碼無bug
 *          ┃   ┃
 *          ┃   ┃  +
 *          ┃    ┗━━━┓ + +
 *          ┃        ┣┓
 *          ┃        ┏┛
 *          ┗┓┓┏━┳┓┏┛ + + + +
 *           ┃┫┫ ┃┫┫
 *           ┗┻┛ ┗┻┛+ + + +
 * <p>
 * Created by hezhao on 2018-08-16 16:33
 */
public class Student {
    private long id;
    private String name;
    private int age;
    private boolean sex;
    private Date birthday;

    public Student() {
    }

    public Student(long id, String name, int age, boolean sex, Date birthday) {
        this.id = id;
        this.name = name;
        this.age = age;
        this.sex = sex;
        this.birthday = birthday;
    }

    public long getId() {
        return id;
    }

    public void setId(long 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 boolean getSex() {
        return sex;
    }

    public void setSex(boolean sex) {
        this.sex = sex;
    }

    public Date getBirthday() {
        return birthday;
    }

    public void setBirthday(Date birthday) {
        this.birthday = birthday;
    }


    @Override
    public String toString() {
        return "Student [id=" + id + ", name=" + name + ", age=" + age 
                + ", sex=" + (sex?"男":"女")+ ", birthday=" + birthday + "]";
    }


}
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