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java poi导出excel
- 博客分类：
- java
<body>
<a href="servlet/DownLoadExcelServlet">下载表格</a> <br>
</body>
public class DownLoadExcelServlet extends HttpServlet {
private static final long serialVersionUID = 1L;
public void doGet(HttpServletRequest request, HttpServletResp ...
java poi读写excel
- 博客分类：
- java
1、读取excel2003
@Test
//读取excel2003
public void testCreateXLS(){
try {
String path = "f:\\app\\iotest\\n.xls.doc";
String postfix = (path.trim().lastIndexOf(".") == -1)?"":path.substring(path.trim().lastIndexOf(".") + 1);
if("xls". ...
1、文件读取
@Test
public void testFileInputStream(){
InputStream in = null;
try {
in = new FileInputStream("f:/a/hello.txt");
int readCount = 0;
byte[] buffer = new byte[1024];
while((readCount = in.read(buffer, 0, 1024)) != -1){
String str = new String(buffer,0, ...
1、求阶乘
public int f1(int n){
if(n == 1){
return 1;
}else{
return n * f1(n-1);
}
}
2、求Fibonacci数列的第n个数是多少
public int f2(int n){
if(n == 1 || n == 2){
return 1;
}else{
return f2(n - 2) + f2(n - 1);
}
}
3、递归删除文件夹下所有文件
public void deleteFiles(File fil ...