J2SE中 用不同方式的流完成对文件的拷贝

                        用不同形式的流完成对文件的拷贝

单纯的字符流：

FileCopy .java

 packagefilewriter; import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException; public class FileCopy {        publicstatic void main(String[] args) {              FileReaderfr = null;              FileWriterfw = null;              try{                      fr = new FileReader(newFile("src/FileWriter/FileCopy.java"));                     fw= new FileWriter(new File("D:/filecopy.txt"));                                         charbuf [] = new char [1024];                     intlen = 0;                     while((len = fr.read(buf))!=-1){                            fw.write(buf,0, len);                                                }              }catch (Exception e) {                     //TODO Auto-generated catch block                     e.printStackTrace();              }finally{                     if(fr!= null){                            try{                                   fr.close();                            }catch (IOException e) {                                   //TODO Auto-generated catch block                                   e.printStackTrace();                            }                     }              }              if(fw!= null){                     try{                            fw.close();                     }catch (IOException e) {                            //TODO Auto-generated catch block                            e.printStackTrace();                     }              }        } }

带缓冲的字符流：

BufferedFileCopy.java

package bufferedstream; import java.io.BufferedReader;import java.io.BufferedWriter;import java.io.File;import java.io.FileNotFoundException;import java.io.FileReader;import java.io.FileWriter;import java.io.IOException; public class BufferedFileCopy {        publicstatic void main(String[] args) throws IOException {              FileReaderfr = new FileReader(new File("D:/buffered.txt"));       FileWriter fw = new FileWriter(new File("buf.txt"));       java.io.BufferedReader br = new BufferedReader(fr);       java.io.BufferedWriter bw = new BufferedWriter(fw);       String content = null;       while ((content = br.readLine())!= null) {                       bw.write(content);                       bw.newLine();                       bw.flush();              }       bw.close();       br.close();              } }