java 到数据库
public ActionForward backUpAction(ActionMapping mapping, ActionForm form,
HttpServletRequest request, HttpServletResponse response)
throws Exception {
Calendar cDay = Calendar.getInstance();
SimpleDateFormat myf = new SimpleDateFormat("yyyyMMddHHmmss");
String day = myf.format(cDay.getTime());
// 获得Constant中定义的数据库备份文件存放路径，格式如：
// public static final String DataBaseBackUpPath = "D:\\sOADB\\";
String outputFile = Constant.DataBaseBackUpPath;
// 如果服务器端硬盘上不存在outputFile目录，则创建这个目录
File mydir = new File(outputFile);
if (!(mydir.exists())) {
mydir.mkdir();
}
// 备份文�
相关文档：
Java IO的一般使用原则：
一、按数据来源（去向）分类：
1、是文件： FileInputStream, FileOutputStream, FileReader, FileWriter
2、是byte[]：ByteArrayInputStream, ByteArrayOutputStream
3、是Char[]: CharArrayReader, CharArrayWriter
4、是String: StringBufferInputStream, StringReader, StringWriter
5、 ......
package com.down.servlet;
import java.io.BufferedInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.URLEncoder;
import javax.servlet.ServletException;
import javax.servlet.ServletOutputStream;
import java ......
class Dog {
public static void bark() {
System.out.print("woof ");
}
}
class Basenji extends Dog {
public static void bark() { }
}
public class Bark {
public static void main(String args[]) {
Dog woofer = new Dog();
Dog nipper = new Basenji();
woofer.bark();
nipper.bark();
}
}
随意地 ......
