利用BufferedInputStream bufferedOutputStream读写文件

来源：互联网发布：威廉叶芝知乎编辑：程序博客网时间：2024/05/22 02:28
    import java.io.BufferedInputStream;      import java.io.BufferedOutputStream;      import java.io.ByteArrayOutputStream;      import java.io.FileInputStream;      import java.io.FileNotFoundException;      import java.io.FileOutputStream;      import java.io.IOException;            public class FileTools {          public static byte[] readFile(String string) {              FileInputStream fileInputStream=null;              BufferedInputStream bufferedInputStream=null;              ByteArrayOutputStream bao=new ByteArrayOutputStream();              byte[] buff=new byte[1024];              try {                  fileInputStream=new FileInputStream(string);                  bufferedInputStream=new BufferedInputStream(fileInputStream);                  int bytesRead=0;                  while (-1!=(bytesRead=bufferedInputStream.read(buff,0,buff.length))) {                      bao.write(buff,0,bytesRead);                  }              } catch (FileNotFoundException e) {                  // TODO Auto-generated catch block                  e.printStackTrace();              } catch (IOException e) {                  // TODO Auto-generated catch block                  e.printStackTrace();              }finally{                  try {                      fileInputStream.close();                      bufferedInputStream.close();                      buff=null;                  } catch (IOException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  }              }              return bao.toByteArray();          }                public static void writeFile(String string,byte[] bytes) {              FileOutputStream fileOutputStream=null;              BufferedOutputStream bufferedOutputStream=null;              try{                  fileOutputStream=new FileOutputStream(string);                  bufferedOutputStream =new BufferedOutputStream(fileOutputStream);                  bufferedOutputStream.write(bytes);              } catch (IOException e) {                  // TODO Auto-generated catch block                  e.printStackTrace();              }finally{                  try {                      bufferedOutputStream.flush();                      fileOutputStream.close();                      bufferedOutputStream.close();                  } catch (IOException e) {                      // TODO Auto-generated catch block                      e.printStackTrace();                  }              }          }      }
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