java文本文件读写并排序

 

public void readAndWrite(){

            File file = new File("F:/lc.txt");

    File file2 = new File("F:/lc2.txt");

    ArrayList<String> list = new ArrayList<String>();

try {

if(!file.exists()){

file.createNewFile();

}

if(!file2.exists()){

file2.createNewFile();

}

BufferedReader in = new BufferedReader(new InputStreamReader(

new FileInputStream(file), "GBK"));

String inText = null;

while((inText=in.readLine())!=null){

list.add(inText);

}

Collections.sort(list);//升序

//PrintWriter out = new PrintWriter(new FileOutputStream(file2));

BufferedWriter out = new BufferedWriter(new OutputStreamWriter(new FileOutputStream(file2)));

for(String outText:list){

out.write(outText);

out.newLine(); //新的一行

}

out.flush();

in.close();

out.close();

} catch (Exception e) {

e.printStackTrace();

} 

}

本文出自 “艰难困苦 玉汝于成” 博客，谢绝转载！