生成xls类型文件：
注意：只能在此生成对应能对应导入数据库的xls文件，使用其他办公软件自动生成的xls文件会出现 在idea中解析xls文件数据类型识别错误不匹配的问题
package com.xja.bean;
import java.io.*;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.text.ParseException;
import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.text.SimpleDateFormat;
import javax.swing.JOptionPane;
import com.xja.bean.Type;
import org.apache.commons.io.FileUtils;
import org.apache.poi.hssf.usermodel.*;
import org.apache.poi.hssf.util.HSSFColor;
import org.junit.Test;
/**
* 利用开源组件POI3.0.2动态导出EXCEL文档 转载时请保留以下信息，注明出处！
*
* @author leno
* @version v1.0
* @param <T>
* 应用泛型，代表任意一个符合javabean风格的类
* 注意这里为了简单起见，boolean型的属性xxx的get器方式为getXxx(),而不是isXxx()
* byte[]表jpg格式的图片数据
*/
public class ExpExcel<T> {
public void exportExcel(Collection<T> dataset, OutputStream out) {
exportExcel("测试POI导出EXCEL文档", null, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String sheetName,String[] headers, Collection<T> dataset,
OutputStream out) {
exportExcel(sheetName, headers, dataset, out, "yyyy-MM-dd");
}
public void exportExcel(String[] headers, Collection<T> dataset,
OutputStream out, String pattern) {
exportExcel("测试POI导出EXCEL文档", headers, dataset, out, pattern);
}
/**
* 这是一个通用的方法，利用了JAVA的反射机制，可以将放置在JAVA集合中并且符号一定条件的数据以EXCEL 的形式输出到指定IO设备上
*
* @param title
* 表格标题名
* @param headers
* 表格属性列名数组
* @param dataset
* 需要显示的数据集合,集合中一定要放置符合javabean风格的类的对象。此方法支持的
* javabean属性的数据类型有基本数据类型及String,Date,byte[](图片数据)
* @param out
* 与输出设备关联的流对象，可以将EXCEL文档导出到本地文件或者网络中
* @param pattern
* 如果有时间数据，设定输出格式。默认为"yyy-MM-dd"
*/
@SuppressWarnings("unchecked")
public void exportExcel(String title, String[] headers,
Collection<T> dataset, OutputStream out, String pattern) {
// 声明一个工作薄
HSSFWorkbook workbook = new HSSFWorkbook();
// 生成一个表格
HSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth((short) 15);
// 生成一个样式
HSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
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);
// 生成一个字体
HSSFFont font = workbook.createFont();
font.setColor(HSSFColor.VIOLET.index);
font.setFontHeightInPoints((short) 12);
font.setBoldweight(HSSFFont.BOLDWEIGHT_BOLD);
// 把字体应用到当前的样式
style.setFont(font);
// 生成并设置另一个样式
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);
// 生成另一个字体
HSSFFont font2 = workbook.createFont();
font2.setBoldweight(HSSFFont.BOLDWEIGHT_NORMAL);
// 把字体应用到当前的样式
style2.setFont(font2);
// 声明一个画图的顶级管理器
HSSFPatriarch patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
HSSFComment comment = patriarch.createComment(new HSSFClientAnchor(0,
0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
comment.setString(new HSSFRichTextString("可以在POI中添加注释！"));
// 设置注释作者，当鼠标移动到单元格上是可以在状态栏中看到该内容.
comment.setAuthor("leno");
// 产生表格标题行
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);
}
// 遍历集合数据，产生数据行
Iterator<T> it = dataset.iterator();
int index = 0;
while (it.hasNext()) {
index++;
row = sheet.createRow(index);
T t = (T) it.next();
// 利用反射，根据javabean属性的先后顺序，动态调用getXxx()方法得到属性值
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[] {});
// 判断值的类型后进行强制类型转换
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);
// }
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[]) {
// 有图片时，设置行高为60px;
row.setHeightInPoints(60);
// 设置图片所在列宽度为80px,注意这里单位的一个换算
sheet.setColumnWidth(i, (short) (35.7 * 80));
// sheet.autoSizeColumn(i);
byte[] bsValue = (byte[]) value;
HSSFClientAnchor anchor = new HSSFClientAnchor(0, 0,
1023, 255, (short) 1, index, (short) 1, index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook.addPicture(
bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
}else if (value instanceof Type) {
Type type = (Type) value;
textValue = type.getTname();
}else {
// 其它数据类型都当作字符串简单处理
System.out.println("value = " + value);
if(value != null){
textValue = value.toString();
}
}
// 如果不是图片数据，就利用正则表达式判断textValue是否全部由数字组成
if (textValue != null) {
Pattern p = Pattern.compile("^//d+(//.//d+)?{1}quot;");
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
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 {
// 清理资源
}
}
}
try {
workbook.write(out);
} catch (IOException e) {
e.printStackTrace();
}
}
public static void main(String[] args) {
// 测试学生
ExpExcel<BookTest> ex = new ExpExcel<BookTest>();
String[] headers = { "图书名称","图片"};
List<BookTest> dataset = new ArrayList<BookTest>();
File file = new File("e://imgs//1.png");
try {
byte[] bytes = FileUtils.readFileToByteArray(file);
dataset.add(new BookTest("水浒传",bytes));
OutputStream out = new FileOutputStream("D://图书信息.xls");
ex.exportExcel("图书信息",headers, dataset, out);
out.close();
JOptionPane.showMessageDialog(null, "导出成功!");
System.out.println("excel导出成功！");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
@Test
public void test() {
// 测试员工
ExpExcel<Emp> ex = new ExpExcel<Emp>();
String[] headers = { "员工编号","姓名","入职时间","薪水"};
List<Emp> dataset = new ArrayList<>();
// File file = new File("e://imgs//1.png");
try {
// byte[] bytes = FileUtils.readFileToByteArray(file);
SimpleDateFormat simpleDateFormat = new SimpleDateFormat("yyyy-MM-dd");
Date parse = simpleDateFormat.parse("2001-02-18");
dataset.add(new Emp(1,"任可",parse,6666.1));
OutputStream out = new FileOutputStream("D://员工信息.xls");
ex.exportExcel("123",headers, dataset, out);
out.close();
JOptionPane.showMessageDialog(null, "导出成功!");
System.out.println("excel导出成功！");
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (ParseException e) {
e.printStackTrace();
}
}
}解析xls文件获取对应对象
package com.xja.bean;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import com.xja.bean.Book;
import com.xja.bean.Type;
import org.apache.poi.hssf.usermodel.HSSFCell;
import org.apache.poi.hssf.usermodel.HSSFRow;
import org.apache.poi.hssf.usermodel.HSSFSheet;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
public class ImpExcel {
public static void main(String[] args) throws IOException, ParseException {
ImpExcel impExcel = new ImpExcel();
Book book = null;
List<Book> list = impExcel.readXls();
for (int i = 0; i < list.size(); i++) {
book = (Book) list.get(i);
System.out.println(book);
}
}
/**
* 读取xls文件内容
*
* @return List<XlsDto>对象
* @throws IOException
* 输入/输出(i/o)异常
* @throws ParseException
*/
public List<Book> readXls() throws IOException, ParseException {
InputStream is = new FileInputStream("D://员工信息.xls");
HSSFWorkbook hssfWorkbook = new HSSFWorkbook(is);
Book book = null;
List<Book> list = new ArrayList<Book>();
// 循环工作表Sheet
for (int numSheet = 0; numSheet < hssfWorkbook.getNumberOfSheets(); numSheet++) {
HSSFSheet hssfSheet = hssfWorkbook.getSheetAt(numSheet);
if (hssfSheet == null) {
continue;
}
// 循环行Row
for (int rowNum = 1; rowNum <= hssfSheet.getLastRowNum(); rowNum++) {
HSSFRow hssfRow = hssfSheet.getRow(rowNum);
if (hssfRow == null) {
continue;
}
book = new Book();
// 循环列Cell
// 0员工编号 2姓名 5入职时间 6薪水
// for (int cellNum = 0; cellNum <=4; cellNum++) {
HSSFCell bid = hssfRow.getCell(0);
if (bid == null) {
continue;
}
book.setBid(Integer.valueOf(getValue(bid)));
HSSFCell bname = hssfRow.getCell(1);
if (bname == null) {
continue;
}
book.setBname(getValue(bname));
HSSFCell price = hssfRow.getCell(3);
if (price == null) {
continue;
}
book.setPrice(Double.valueOf(getValue(price)));
// HSSFCell author = hssfRow.getCell(3);
// if (author == null) {
// continue;
// }
// book.setAuthor(getValue(author));
HSSFCell publishdate = hssfRow.getCell(2);
if (publishdate == null) {
continue;
}
SimpleDateFormat format = new SimpleDateFormat("yyyy-MM-dd");
book.setPublishdate(format.parse(getValue(publishdate)));
//
// HSSFCell imgurl = hssfRow.getCell(5);
// if (imgurl == null) {
// continue;
// }
// book.setImgurl(getValue(imgurl));
//
// HSSFCell tid = hssfRow.getCell(7);
// if (tid == null) {
// continue;
// }
// book.setType(new Type(Integer.valueOf(getValue(tid)),null));
list.add(book);
}
}
return list;
}
private String getValue(HSSFCell hssfCell) {
if (hssfCell.getCellType() == hssfCell.CELL_TYPE_BOOLEAN) {
// 返回布尔类型的值
return String.valueOf(hssfCell.getBooleanCellValue());
} else if (hssfCell.getCellType() == hssfCell.CELL_TYPE_NUMERIC) {
// 返回数值类型的值
return String.valueOf(hssfCell.getNumericCellValue());
} else {
// 返回字符串类型的值
return String.valueOf(hssfCell.getStringCellValue());
}
}
}本文章为转载内容，我们尊重原作者对文章享有的著作权。如有内容错误或侵权问题，欢迎原作者联系我们进行内容更正或删除文章。
