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.Iterator;
import java.util.List;
import java.util.regex.Matcher;
import java.util.regex.Pattern; 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.HSSFRichTextString;
import org.apache.poi.hssf.usermodel.HSSFWorkbook;
import org.apache.poi.hssf.util.HSSFColor;
import org.apache.poi.xssf.usermodel.XSSFCell;
import org.apache.poi.xssf.usermodel.XSSFCellStyle;
import org.apache.poi.xssf.usermodel.XSSFClientAnchor;
import org.apache.poi.xssf.usermodel.XSSFComment;
import org.apache.poi.xssf.usermodel.XSSFDrawing;
import org.apache.poi.xssf.usermodel.XSSFFont;
import org.apache.poi.xssf.usermodel.XSSFRichTextString;
import org.apache.poi.xssf.usermodel.XSSFRow;
import org.apache.poi.xssf.usermodel.XSSFSheet;
import org.apache.poi.xssf.usermodel.XSSFWorkbook; import com.jy.modules.platform.sysorg.dto.ModifyPwdVO;
import com.jy.modules.platform.sysorg.dto.SysOrgDTO; @SuppressWarnings("all")
public class ExportExcel<T> { public String exportExcel(String sheetTitle,Collection<T> dataset, OutputStream out) {
return exportExcel(sheetTitle, null, dataset, out, "yyyy-MM-dd");
} public String exportExcel(String sheetTitle,String[] headers, Collection<T> dataset,
OutputStream out) {
return exportExcel(sheetTitle, headers, dataset, out, "yyyy-MM-dd");
}
/**
* 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 String exportExcel(String title, String[] headers,
Collection<T> dataset, OutputStream out, String pattern) {
String state = "fail";
// 声明一个工作薄
XSSFWorkbook workbook = new XSSFWorkbook();
// 生成一个表格
XSSFSheet sheet = workbook.createSheet(title);
// 设置表格默认列宽度为15个字节
sheet.setDefaultColumnWidth(12);
// 生成一个样式
XSSFCellStyle style = workbook.createCellStyle();
// 设置这些样式
style.setFillForegroundColor(HSSFColor.GREEN.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
XSSFFont font = workbook.createFont();
font.setFontName(HSSFFont.FONT_ARIAL);
font.setColor(HSSFColor.BLACK.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
XSSFCellStyle 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
XSSFFont 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*管理器
XSSFDrawing patriarch = sheet.createDrawingPatriarch();
// 定义注释的大小和位置,详见文档
/*XSSFComment comment = patriarch.createCellComment(new XSSFClientAnchor(0,
0, 0, 0, (short) 4, 2, (short) 6, 5));
// 设置注释内容
comment.setString(new XSSFRichTextString("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
XSSFRow row;
int index = 0;
if(headers!=null){
row = sheet.createRow(0);
index++;
for (short i = 0; i < headers.length; i++) {
XSSFCell cell = row.createCell(i);
cell.setCellStyle(style);
XSSFRichTextString text = new XSSFRichTextString(headers[i]);
cell.setCellValue(text);
}
}
Iterator<T> itt = dataset.iterator();
boolean columnTitle =false;
while (itt.hasNext()) {
row = sheet.createRow(index);
index++;
T t = (T) itt.next();
Field[] fields = t.getClass().getDeclaredFields();
int titleIndex = 0;
for (short i = 0; i < fields.length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if("serialVersionUID".equals(fieldName)){
continue;
}else{
XSSFCell cell = row.createCell(titleIndex);
titleIndex++;
cell.setCellStyle(style);
cell.setCellValue(fieldName);
}
}
break;
}
itt = null;
Iterator<T> it = dataset.iterator();
// 遍历集合数据，产生数据行
while (it.hasNext()) {
row = sheet.createRow(index);
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();
int cellIndex = 0;
for (short i = 0; i < fields.length; i++) {
Field field = fields[i];
String fieldName = field.getName();
if("serialVersionUID".equals(fieldName)){
continue;
}
XSSFCell cell = row.createCell(cellIndex);
cellIndex++;
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){
continue;
}
cell.setCellStyle(style2);
// 判断值的类型后进行强制类型转换
String textValue = null;
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) 6, index, (short) 6, index);
anchor.setAnchorType(2);
patriarch.createPicture(anchor, workbook.addPicture(
bsValue, HSSFWorkbook.PICTURE_TYPE_JPEG));
} else {
// 其它数据类型都当作字符串简单处理
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+)?$");
Matcher matcher = p.matcher(textValue);
if (matcher.matches()) {
// 是数字当作double处理
cell.setCellValue(Double.parseDouble(textValue));
} else {
XSSFRichTextString richString = new XSSFRichTextString(
textValue);
XSSFFont 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();
}
}
}
try {
workbook.write(out);
state = "succes";
} catch (IOException e) {
e.printStackTrace();
}finally{
try {
out.close();
} catch (IOException e) {
e.printStackTrace();
}
return state;
}
}
}
public static void main(String[] args) throws FileNotFoundException {
// TODO Auto-generated method stub
ExportExcel<test> ex = new ExportExcel<test>();
List<test> dataset = new ArrayList<test>();
for(int i =0;i<8;i++){
test dto = new test();
dto.setUsername("9999");
dto.setPassword("hahahah ");
dto.setNewpwd("111");
dto.setSource("66666");
dataset.add(dto);
}
OutputStream out = new FileOutputStream("E://a.xlsx");
//ex.exportExcel("机构导出",dataset,out);
String header[] = new String[]{"ID","机构编码","机构名称","机构类型"};
ex.exportExcel("机构导出",header,dataset,out);
}