Quantcast
Channel: PHP Web开发教程 | Java web开发教程 |码农网 » java io教程
Browsing all 10 articles
Browse latest View live

java将一个对象写入文件

Java object can write into a file for future access, this is called serialization. In order to do this, you have to implement the Serializableinterfac[......] Read more

View Article



Java检查一个文件是否存在

Java检查一个文件是否存在,使用 File.exists().   import java.io.*; public class FileChecker { public static void main(String args[]) { File f =[......] Read more

View Article

java获取可以磁盘空间大小

In Java old days, it lacks of method to determine the free disk space on a partition. But this is changed since JDK 1.6 released, a few new methods –[......] Read more

View Article

Java向文件中写入UTF-8编码的数据

本例使用java将 UTF-8 encoded data 写入文件 “c:\\temp\\test.txt” P.S Symbol “??” is some “UTF-8″ data in Chinese and Japanese import java.io.BufferedW[......] Read more

View Article

压缩序列化的对象到文件

本例介绍,压缩序列化的对象到文件,以减小文件大小。 思路很简单,即使用 “GZIPOutputStream”进行数据压缩. FileOutputStream fos = new FileOutputStream("c:\\address.gz"); GZIPOutputStream[......] Read more

View Article


怎样解压缩gzip文件

本文介绍怎样解压缩gzip文件 Gzip example 本例解压缩文件 “/home/mkyong/file1.gz” back to “/home/mkyong/file1.txt“. import java.io.FileInputStream; import java.i[......] Read more

View Article

java检查隐藏文件

通过 java.io.File isHidden() 检查一个文件是否隐藏。 import java.io.File; import java.io.IOException; public class FileHidden { public static voi[......] Read more

View Article

java怎样删除目录

java中可以使用 File.delete() 删除目录, 但是被删除的目录必须是空的才可以。 很多时候,我们需要递归删除一个目录( recursive delete in a directory), 这意味着该目录的所有子目录和该目录下的文件都需要被删除。下面是一个例子: Director[......] Read more

View Article


Java将InputStream 转为String

Java中可以使用 BufferedReader + InputStreamReader将InputStream 转为String InputStreamToStringExample.java   import java.io.BufferedReader; import java[......] Read more

View Article


Java得到一个文件的行数

The LineNumberReader class is a useful class to handle the lines of a file, you can loop the LineNumberReader.readLine() method and accumulate it as t[......] Read more

View Article
Browsing all 10 articles
Browse latest View live




Latest Images