Java 一边读边写即读一行写一行

public static void CreateFile(String src,String des){

String path1="D:\\test\\data\\"+src;

String path2="D:\\test\\res\\"+des;

File file1=new File(path1);

//StringBuilder sb=new StringBuilder();

File file2=new File(path2);

try {

if(!file2.exists()){

file2.createNewFile();

}

BufferedReader br=new BufferedReader(new FileReader(file1));

String line=br.readLine();

BufferedWriter bw=new BufferedWriter(new FileWriter(file2,true));

while(line!=null){

bw.write(line+"\r\n");

line=br.readLine();

}

br.close();

bw.flush();

bw.close();

} catch (IOException e) {

e.printStackTrace();

}

}