Java IO工具類

import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
/**


@author 
@ IO工具類
*/
public class IOUtil {
private IOUtil(){};
/**
將流轉成字符串
*/
public  static   String  Stream2String(InputStream is)throws  IOException{
  ByteArrayOutputStream   baos   =   new   ByteArrayOutputStream(); 
 int   i=-1; 
 while((i=is.read())!=-1){ 
 baos.write(i); 
 } 
return   new String(baos.toByteArray(),"UTF-8"); 

};
/**
將輸入流存儲到byte數組中
@param 
*/
public static byte[] in2byte(InputStream is) throws IOException{
 byte[] bs= new byte[1024];
 ByteArrayOutputStream bos = new ByteArrayOutputStream();
 int len = -1;
 while((len=is.read(bs))!=-1){
   bos.write(bs,0,len);
 }
 bs = bos.toByteArray() ;
 return bs ;
}
/**

byte數組轉換成string
@param 
*/
public static String toString(byte[] input) throws IOException {

 return new String(input);


}
/**

byte數組轉換成string

@param charset  編碼格式
*/
public static String toString(byte[] input,String charset) throws IOException {
 return new String(input,charset);

}
/**
將字符串轉換為輸入流
@param charset  編碼格式
*/
public static InputStream toInputStream(String input) {
 byte[] bytes = input.getBytes();
 return new ByteArrayInputStream(bytes);
}
/**

將byte數組轉換為輸入流

@param charset  編碼格式
*/
public  static  InputStream byte2InputStream(byte[] b){
return  new ByteArrayInputStream(b);
};
/**

將字符串轉換為輸入流

@param input  需要轉換的字符串



@param encoding  編碼格式

*/
  public static InputStream toInputStream(String input, String encoding) throws IOException {
byte[] bytes = encoding != null ? input.getBytes(encoding) : input.getBytes();
return new ByteArrayInputStream(bytes);
}
  public static  void copy(InputStream in, OutputStream out) throws IOException {
byte[] buf = new byte[1024];
while (true) {
int len = in.read(buf);
 if (len < 0) break;
out.write(buf, 0, len);
}
}
}</pre>