Java图片和二进制互转,可以是jpg,png,gif格式
package com.webkfa.test; /** * * @author songlei */ import java.awt.image.BufferedImage; import java.io.ByteArrayInputStream; import java.io.ByteArrayOutputStream; import java.io.File; import java.io.IOException; import javax.imageio.ImageIO; import sun.misc.BASE64Decoder; import sun.misc.BASE64Encoder; public class Test { static BASE64Encoder encoder = new sun.misc.BASE64Encoder(); static BASE64Decoder decoder = new sun.misc.BASE64Decoder(); public static void main(String[] args) { //把图片用二进制字符串输出 System.out.println(getImageBinary()); //二进制字符串转成图片 base64StringToImage(getImageBinary()); } public static String getImageBinary(){ File f = new File("C:\\Documents and Settings\\zhouyingxi\\桌面\\temp\\QQ图片20140922135352.jpg"); BufferedImage bi; try { bi = ImageIO.read(f); ByteArrayOutputStream baos = new ByteArrayOutputStream(); ImageIO.write(bi, "jpg", baos); byte[] bytes = baos.toByteArray(); return encoder.encodeBuffer(bytes).trim(); } catch (IOException e) { e.printStackTrace(); } return null; } public static void base64StringToImage(String base64String){ try { byte[] bytes1 = decoder.decodeBuffer(base64String); ByteArrayInputStream bais = new ByteArrayInputStream(bytes1); BufferedImage bi1 =ImageIO.read(bais); File w2 = new File("c://QQ.bmp");//可以是jpg,png,gif格式 ImageIO.write(bi1, "jpg", w2);//不管输出什么格式图片,此处不需改动 } catch (IOException e) { e.printStackTrace(); } } }