问题描述

利用java io逐行操作文件并替换内容

A文件：
as1
dfg1
hjkl1
逐行读取A文件的内容，将1替换成 一 后将替换后的内容写到B文件中

解决方案

BufferedReader readBuffer = new BufferedReader(new FileReader( new File("D:/aaaa.txt")));
BufferedWriter write = new BufferedWriter(new FileWriter(new File("D:/bbbb.txt")));
String line = readBuffer.readLine();
while(line!=null){
write.write(line.replaceAll("1", "替换后")+"
");
line = readBuffer.readLine();
}
write.flush();

    不谢；

解决方案二：

 File file = new File(输入文件);
BufferedReader reader = new BufferedReader(new FileReader(file));
BufferedWriter bw = new BufferedWriter(new FileWriter(输出文件));
String tempString = null;
while ((tempString = reader.readLine()) != null) {
    wr.writeLine(tempString.replace("1", "替换后"));
}

解决方案三：

1楼应该写的是bw,

 while ((tempString = reader.readLine()) != null) {
    bw.write(tempString.replace("1", "替换后"));
        bw.newLine();
}

解决方案四：

java io操作文件
JAVA文件IO操作
java io对文件的操作