java实现导出excle类型文件

偶将最近写了两个导出excel的方法,第一个是面向过程的思路,就是在指定的单元格写入指定的值,如下:
/**
*负责数据导入到EXCEL
*
* @param realPath
* EXCEL表格存放的绝对路径
* @param sheetname
*
* @param xLocation
* EXCEL表格的行索引,从1开始
* @param yLocation
* EXCEL表格的列索引,从1开始
* @param value
* 需要导入的数据
*
*/
public void modifyExcel(String realPath,String sheetname,int xLocaion,int yLocation,String value){
POIFSFileSystem fs=null;
HSSFWorkbook wb=null;
try {
File file=new File(realPath);
if(file.exists()){
fs = new POIFSFileSystem(new FileInputStream(realPath));
wb=new HSSFWorkbook(fs);
HSSFSheet s=wb.getSheetAt(0);
//函数处理时横纵坐标从索引0开始
HSSFRow row=s.getRow(xLocaion-1);              
HSSFCell cell=null;
if(row!=null){
cell=row.getCell(yLocation-1);
if(cell==null){
cell=row.createCell(yLocation-1);
}
}else{
row=s.createRow(xLocaion-1);
cell=row.createCell(yLocation-1);
}

cell.setCellValue(value);

}else{
wb=new HSSFWorkbook();
HSSFSheet s=wb.createSheet();
wb.setSheetName(0, sheetname);
HSSFRow row=s.createRow(xLocaion-1);
HSSFCell cell=row.createCell(yLocation-1);
cell.setCellValue(value);
}
FileOutputStream fos=new FileOutputStream(realPath); 
wb.write(fos);
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();

 
}

第二种就是运用了对象,以对象为单位写入数据,即一个对象的所有属性在一行列出,有多少个对象就有多少行,此方法比较适用于个人信息导出之类的应用,至于导出属性的顺序问题在导出对象的实体类内部改动下即可:
/**
*负责数据导入到EXCEL
*
* @param realPath
* EXCEL表格存放的绝对路径
* @param sheetname
*
* @param users
         *                              需要导出到excel表的对象数组
*/
public  void outputExcel(String realPath,String sheetname,UserModel[] users){
FileOutputStream fos;
try {
File file=new File(realPath);

fos = new FileOutputStream(file, true);
HSSFWorkbook wb = new HSSFWorkbook();
HSSFSheet s=wb.createSheet();
wb.setSheetName(0, sheetname);
HSSFRow[] rows=new HSSFRow[users.length];
HSSFCell[][] cells=new HSSFCell[20][20];
for (int i=0; i<users.length;i++) { // 相当于excel表格中的总行数
PropertyDescriptor[] descriptors=getAvailablePropertyDescriptors(users[i]);
rows[i]=s.createRow(i);
for (int j=0; descriptors!=null&&j<descriptors.length;j++) {
java.lang.reflect.Method readMethod = descriptors[j]
.getReadMethod();
cells[i][j]=rows[i].createCell(j);
Object value=readMethod.invoke(users[i], null);
cells[i][j].setCellValue(value.toString());

}

}
wb.write(fos);
fos.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} catch (IllegalArgumentException e) {
e.printStackTrace();
} catch (IllegalAccessException e) {
e.printStackTrace();
} catch (InvocationTargetException e) {
e.printStackTrace();
}

}

你可能感兴趣的:(java实现)