java-I/O流读取图片字节码

//测试类public class Test {public static void main(String[] args) {Image img = new Image();String str = img.getRimg();img.getWimg(str);}}//输入流import java.io.BufferedInputStream;import java.io.BufferedOutputStream;import java.io.File;import java.io.FileInputStream;import java.io.FileNotFoundException;import java.io.FileOutputStream;import java.io.IOException;public class Image {public String getRimg(){ StringBuilder builder = new StringBuilder(1000000); int i; try { new File("text//img.txt").createNewFile(); FileInputStream in = new FileInputStream("text//img.txt"); BufferedInputStream bis = new BufferedInputStream(in); while((i=in.read())!=-1){ builder.append((char)i); } bis.close(); }catch (FileNotFoundException e) { e.printStackTrace(); }catch (IOException e) { e.printStackTrace(); }finally{ return builder.toString(); } } //输出流 public void getWimg(String content){ try { new File("text//img.jpg").createNewFile(); FileOutputStream out = new FileOutputStream("text//img.jpg"); BufferedOutputStream bos = new BufferedOutputStream(out); char[] ch = content.toCharArray(); System.out.println(ch); for(int i=0;i<ch.length;i++){ bos.write(ch[i]); } bos.flush(); bos.close(); } catch (IOException e) { e.printStackTrace(); } }}