在线等:用File类copy文件的时候怎么使源文件保留? 用一个FileInputStream和一个FileOutputStream配对使用 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 从FileInputStream里面读,往FileOutputStream里面写不就可以了 import java.io.*;public class FileCopy{ private File src = null; private File des = null; public FileCopy( File src,File des ) { this.src = src; this.des = des; } public boolean copy() { try{ BufferedReader in = new BufferedReader( new FileReader(src) ); BufferedWriter out = new BufferedWriter( new FileWriter(des) ); String line = null; StringBuffer t = new StringBuffer(""); while( (line = in.readLine()) != null ) { t.append( line + "\r\n" ); } in.close(); out.write( t.toString() ); out.flush(); out.close(); } catch( IOException e ) { System.out.println( "Wrong" ); return false; } return true; } public static void main( String args[] ) { File src = new File( ".","FileCopy.java" ); File des = new File( ".","Copy.java" ); FileCopy copy = new FileCopy( src,des ); copy.copy(); }} 请问java 怎么将内存虚拟成磁盘使用 用正则表达式的一个报错 求救,同一包中,当一个类中引用了另外一个类时,如何在命令提示行中进行编译啊 关于sql server指针回滚问题 小弟遇到了问题了 进者有分了!关于一个jtree的问题. 关于在static方法调用非static方法 向一个DefaultTableModel插入一行数据为何失败??? 求教:JBuilder8 中实现“run 文件”方法。 关于接口和类型强制转换的问题! 惊爆!迷茫!大虾帮帮我吧! jdbc连接access问题。为什么不能插入
{
private File src = null;
private File des = null; public FileCopy( File src,File des ) {
this.src = src;
this.des = des;
} public boolean copy() {
try{
BufferedReader in = new BufferedReader(
new FileReader(src) );
BufferedWriter out = new BufferedWriter(
new FileWriter(des) );
String line = null;
StringBuffer t = new StringBuffer("");
while( (line = in.readLine()) != null ) {
t.append( line + "\r\n" );
}
in.close();
out.write( t.toString() );
out.flush();
out.close();
}
catch( IOException e ) {
System.out.println( "Wrong" );
return false;
} return true;
} public static void main( String args[] ) {
File src = new File( ".","FileCopy.java" );
File des = new File( ".","Copy.java" );
FileCopy copy = new FileCopy( src,des );
copy.copy();
}
}