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 + "]";
}
}