java中快速读写图⽚到BufferedImage对象java7读取⽂件到BufferedImage对象
BufferedImage bufferedImage = (basePath + imageSource)));
java7写⼊⽂件到图⽚对象
ImageIO.write(bufferedImage, "jpg", (fullPath)));
The call wInputStream will return a ChannelInputStream which (AFAIK) is not buffered. You'll want to wrap it new wInputStream(...));
So that there are less IO calls to disk, depending on how you use it.
意译：据我所知，调⽤wInputStream将会返回⼀些ChannelInputStream对象。如果你想对他进⾏封装，使⽤以下代码
new (fullPath)));
如此⼀来，磁盘IO的调⽤频次将会降低，具体看你怎么⽤了。
⼯具类：
对象图片高清slf4j.Slf4j;
import sun.misc.BASE64Decoder;
import sun.misc.BASE64Encoder;
import javax.imageio.ImageIO;
import java.awt.image.BufferedImage;
import java.io.BufferedInputStream;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;
@Slf4j
public final class GraphUtil {
/**
* Encode Image to Base64 String
* @param image
* @param type
* @return
*/
public static String encodeToString(BufferedImage image, String type) {
String imageString = null;
ByteArrayOutputStream bos = new ByteArrayOutputStream();
try {
ImageIO.write(image, type, bos);
byte[] imageBytes = ByteArray();
BASE64Encoder encoder = new BASE64Encoder();
imageString = de(imageBytes);
bos.close();
} catch (IOException e) {
e.printStackTrace();
}
return imageString;
}
/***
* Decode Base64 String to Image
* @param imageString
* @return
*/
public static BufferedImage decodeToImage(String imageString) {
BufferedImage image = null;
byte[] imageByte;
try {
BASE64Decoder decoder = new BASE64Decoder();
imageByte = decoder.decodeBuffer(imageString);
ByteArrayInputStream bis = new ByteArrayInputStream(imageByte);
image = ad(bis);
bis.close();
} catch (Exception e) {
e.printStackTrace();
}
return image;
}
public static BufferedImage getBufferedImage(String basePath, String imageSource){
try {
ad(new (basePath, imageSource))));        } catch (IOException e) {
<("读取图⽚出错:{}",e);
return null;
}
}
}
参考来源：