下面的代码供你参考，希望能帮到你~！import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.PrintWriter;public class FileProcess { private static String srcFile = "C:\\123.txt";//源文件---需要读取的文件 private static String desFile = "C:\\fileio.txt";//目标文件---需要写入的文件 /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub try{ BufferedReader in = new BufferedReader( new FileReader( new File(srcFile))); PrintWriter out = new PrintWriter( new FileWriter( new File(desFile))); //读取源文件的每一行，写到目标文件中去 String line; while((line = in.readLine())!=null) out.write(line+"\r\n"); in.close(); out.close(); }catch(Exception e){ e.printStackTrace(); } }}