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从一个文件读取数据然后写入另一个文件

2024-11-07 来源:个人技术集锦
public void readDataFromFileAndWriteToAotherFile(String oldUrl,String newUrl){
// File file = new File("D:\\abc.txt");
File file = new File(newUrl);
try {
if (!file.exists() != false) {
file.createNewFile();
}
} catch (IOException e) {
e.printStackTrace();
}
String line = null;
try {
BufferedWriter bw = new BufferedWriter(new FileWriter(file));//打开写入流

FileReader fr = new FileReader(oldUrl);//打开输出流
BufferedReader br = new BufferedReader(fr);
while ((line = br.readLine()) != null) {//输出一行
bw.write(line);//写入一行字符串
bw.newLine();//换行
bw.flush();
}
br.close();
bw.close();
} catch (Exception e) {
e.printStackTrace();
}finally {
}
}
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