java 文件读和写

1.将文件内容读取并写到新文件中，(windows路径)

　　

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

public class ReadWriteFile {
    public static void main(String[] args) {
          BufferedReader reader=null; 
          BufferedWriter write = null; 
          try {
              //从原文件中读出 文件为utf-8编码防止中文乱码
              FileInputStream fis = new  FileInputStream("E:\\test\\test.sql");
              //写入文件
              FileOutputStream fos = new FileOutputStream("E:\\test\\testWrite.sql");
              reader = new  BufferedReader(new InputStreamReader(fis)); 
              write = new BufferedWriter(new  OutputStreamWriter(fos));
              String temp = ""; 
              while((temp=reader.readLine()) != null) {
                  write.write(temp+"\r\n");//每写一行就换行
              }
          }catch(Exception e) { 
              e.printStackTrace();
          } try {
              if(reader!=null) {
                  reader.close();
              }
              if(write!=null) {
                  write.close(); 
              }
              } catch (IOException e) {
          }
    }
}

2.以上代码 在eclipse里右键运行即可，源文件的内容必须存在哦！

~路漫漫其修远兮 吾将上下而求索~