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1. 经过测试可以复制 txt excel csv exe pdf文件其他格式的没测，估计也没问题
public class Hello { private static final String LINE_SEPARATOR = System.getProperty("line.separator");//换行 public static void main(String[] args) throws Exception { FileInputStream reader = new FileInputStream("d:/毕向东Java基础课堂笔记.pdf"); FileOutputStream writer = new FileOutputStream("e:\\毕向东Java基础课堂笔记.pdf"); int len = 0; byte[] buffer = new byte[1024*1024];//1MB缓存 while((len = reader.read(buffer))!=-1){ //len = reader.read(buffer) buffer千万不要忘了，否则复制的文件超大 writer.write(buffer ,0 , len); writer.flush(); } System.out.println("复制成功"); writer.close(); reader.close(); } }
2.优化复制文件
public static void main(String[] args) throws Exception {
File src = new File("d:/Evernote_6.1.2.2292.exe");
File des = new File("e:\\NEW_Evernote_6.1.2.2292.exe");
copyFile(src,des);
}
private static void copyFile(File src, File des) throws Exception{
FileInputStream reader = new FileInputStream(src);
FileOutputStream writer = new FileOutputStream(des);
int len = 0;
byte[] buffer = new byte[1024*1024];//1MB缓存
while((len = reader.read(buffer))!=-1){ //len = reader.read(buffer) buffer千万不要忘了，否则复制的文件超大，陷入死循环
writer.write(buffer ,0 , len);
writer.flush();
}
System.out.println("复制成功");
writer.close();
reader.close();
}
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原文地址：http://www.cnblogs.com/bravolove/p/5811307.html
