package com.bjpowernode.demo03;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
/**
- 使用FileReader/FileWriter实现文本文件的复制
- @author Administrator
*/
public class Test02 {
public static void main(String[] args) {
String srcFile = "D:/course/JavaProjects/03-JavaSE/Day08/src/com/bjpowernode/demo03/Test01.java" ;
String destFile = "d:/test01.java" ;
copyFile( srcFile, destFile);
}
//一次复制一个字符数组, 自动关闭流
private static void copyFile(String srcFile, String destFile) {
try (
FileReader fr = new FileReader(srcFile);
FileWriter fw = new FileWriter(destFile);
){
char [] contents = new char[20];
int len = fr.read(contents);
while( len != -1 ){
fw.write(contents, 0 , len);
len = fr.read(contents);
}
} catch (Exception e) {
}
}
// 一次复制一个字符, 手动关闭流, 异常处理
private static void copyFile2(String srcFile, String destFile) {
FileReader fr = null;
FileWriter fW = null;
try {
fr = new FileReader(srcFile);
fW = new FileWriter(destFile);
int cc = fr.read();
while( cc != -1){
fW.write(cc);
cc = fr.read();
}
} catch (Exception e) {
}finally {
if ( fr != null) {
try {
fr.close();
} catch (IOException e) {
e.printStackTrace();
}
}
if (fW != null ) {
try {
fW.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
}