import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;
/*
* 数据源：
* a.txt -- FileReader -- BufferdReader
* 目的地：
* b.txt -- FileWriter -- BufferedWriter
* 推荐使用第五种
*/
public class CopyFileDemo {
public static void main(String[] args)
throws IOException {
String srcString = "a.txt"
;
String destString = "b.txt"
;
// method1(srcString, destString);
// method2(srcString, destString);
// method3(srcString, destString);
// method4(srcString, destString);
method5(srcString, destString);
}
// 字符缓冲流一次读写一个字符串
private static void method5(String srcString, String destString)
throws IOException {
BufferedReader br =
new BufferedReader(
new FileReader(srcString));
BufferedWriter bw =
new BufferedWriter(
new FileWriter(destString));
String line =
null;
while ((line = br.readLine()) !=
null) {
bw.write(line);
bw.newLine();
bw.flush();
}
bw.close();
br.close();
}
// 字符缓冲流一次读写一个字符数组
private static void method4(String srcString, String destString)
throws IOException {
BufferedReader br =
new BufferedReader(
new FileReader(srcString));
BufferedWriter bw =
new BufferedWriter(
new FileWriter(destString));
char[] chs =
new char[1024
];
int len = 0
;
while ((len = br.read(chs)) != -1
) {
bw.write(chs, 0
, len);
}
bw.close();
br.close();
}
// 字符缓冲流一次读写一个字符
private static void method3(String srcString, String destString)
throws IOException {
BufferedReader br =
new BufferedReader(
new FileReader(srcString));
BufferedWriter bw =
new BufferedWriter(
new FileWriter(destString));
int ch = 0
;
while ((ch = br.read()) != -1
) {
bw.write(ch);
}
bw.close();
br.close();
}
// 基本字符流一次读写一个字符数组
private static void method2(String srcString, String destString)
throws IOException {
FileReader fr =
new FileReader(srcString);
FileWriter fw =
new FileWriter(destString);
char[] chs =
new char[1024
];
int len = 0
;
while ((len = fr.read(chs)) != -1
) {
fw.write(chs, 0
, len);
}
fw.close();
fr.close();
}
// 基本字符流一次读写一个字符
private static void method1(String srcString, String destString)
throws IOException {
FileReader fr =
new FileReader(srcString);
FileWriter fw =
new FileWriter(destString);
int ch = 0
;
while ((ch = fr.read()) != -1
) {
fw.write(ch);
}
fw.close();
fr.close();
}
}
转载于:https://www.cnblogs.com/neuhao/p/6491258.html
