用java实现两个文本文件的复制 怎么用java实现将一个文件的内容复制到另一个文件内容的后面
\u600e\u4e48\u7528java\u5b9e\u73b0\u5c06\u4e00\u4e2a\u6587\u4ef6\u7684\u5185\u5bb9\u590d\u5236\u5230\u53e6\u4e00\u4e2a\u6587\u4ef6\u5185\u5bb9\u7684\u540e\u9762java\u7684io\u6d41\uff0c\u8bfb\u53d6\u6587\u4ef6\uff0c\u6709\u4e00\u4e2aappend\u65b9\u6cd5\u53ef\u4ee5\u5728\u6587\u4ef6\u7684\u540e\u9762\u8ffd\u52a0\u65b0\u7684\u5185\u5bb9
import java.io.BufferedReader;import java.io.File;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException;public class FileCopy {static final String fromeFile = "c:\\test1.txt";static final String toFile = "c:\\test2.txt";public static void main(String args[]) {try {BufferedReader read = new BufferedReader(new FileReader(new File(fromeFile)));FileWriter write = new FileWriter(new File(toFile), true);String temp;while((temp = read.readLine())!=null){write.write(temp);}write.close();read.close();System.out.println("\u5185\u5bb9\u5df2\u4ece"+fromeFile+"\u590d\u5236\u8ffd\u52a0\u5230"+toFile);} catch (IOException e) {e.printStackTrace();}}}
public class ReadWriteFile{
public static void main(String [] args){
try{
File read = new File("c:\\test1.txt");
File write = new File("c:\\test2.txt");
BufferedReader br = new BufferedReader(new FileReadder(read));
BufferedWriter bw = new BufferedWriter(new FileWriter(write));
String temp =null;
temp=br.readLine();
while(temp!=null){
//写文件,只适用与windows系统
bw.write(temp+"\r\n");
//继续写文件
temp = br.readLine();
}
bw.close();
br.close();
}catch(FileNotFoundException fe){
System.out.println(fe.getMessage());
fe.printStackTrace();
}catch(Exception e){
System.out.println(e.getMessage());
e.printStackTrace();
}
}
}
你先把一个文件读到内存里，再把这些数据写到另一个文件里
可以用流来进行读写
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绛旓細import java.io.*;public class ReadWriteFile{ public static void main(String [] args){ try{ File read = new File("c:\\test1.txt");File write = new File("c:\\test2.txt");BufferedReader br = new BufferedReader(new FileReadder(read));BufferedWriter bw = new BufferedWriter...
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绛旓細import java.io.*;public class fileStream { static FileInputStream fis;static FileOutputStream fos; //澹版槑闈欐鏂囦欢杈撳叆銆佸嚭娴 static int a; //瀹氫箟闈欐佸彉閲廰 public static void main(String arg[]){ try { copyFile(); //璋冪敤澶嶅埗鏂囦欢鍑芥暟 fis.close();fos.close(); //鍏...
绛旓細"c:/output.txt"; /** * 鎬ユ眰锛侊紒鐢╦ava璇█灏嗕竴涓枃鏈枃浠a.txt涓殑鍐呭鍐欏叆涓涓柊鏂囦欢b.txt涓 鎮祻鍒嗭細20 | 绂婚棶棰樼粨鏉熻繕鏈 14 澶 23 灏忔椂
绛旓細BufferedReader bre = null;OutputStreamWriter pw = null;//瀹氫箟涓涓祦 try { String file = "D:/test/test.txt";bre = new BufferedReader(new FileReader(file));//姝ゆ椂鑾峰彇鍒扮殑bre灏辨槸鏁翠釜鏂囦欢鐨缂撳瓨娴 pw = new OutputStreamWriter(new FileOutputStream(鈥淒:/test.txt鈥),"GBK");//...
绛旓細import java.awt.*;import java.io.*;import java.awt.event.*;public class app12_10 extends Frame { static Panel pan= new Panel();static TextField txt=new TextField(15);static String s,str;static double a;static boolean b1=false;static boolean b2=false;//static boolean b3=...
绛旓細import java.io.FileInputStream;import java.io.FileOutputStream;import java.io.IOException;public class MyCopy { public void fileCopy(String sFile, String oFile) { File file = new File(sFile);if (!file.exists()) { System.out.println(sFile + " not have");return;} File fileb...
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绛旓細浣犵殑鎰忔濇槸涓嶆槸浠涓や釜txt涓彁鍙栧嚭鐩稿悓鐨勫瓧绗︿覆锛熺湅鐪嬩笅闈唬鐮侊細浠庡綋鍓嶅伐浣滅洰褰曚笅鏈1.txt鍜2.txt鎻愬彇鍑哄畠浠浉鍚岀殑瀛愬瓧绗︿覆銆俰mport java.io.BufferedReader;import java.io.File;import java.io.FileInputStream;import java.io.IOException;import java.io.InputStreamReader;import java.util.ArrayList;...
