Thumbnailator Compress Pictures

 Thumbnailator Google is an excellent open-source Java library picture processing. The treatment effect is far better than the Java API. Providing existing image files and the image of the object from the API to simplify the processing of the class, two or three lines of code to generate the processed image from the existing image, and allows fine-tuning of image generation mode, to be written while maintaining the minimal amount of code. Also supports all pictures in a directory of batch processing operations.

Processing operations supported: image scaling, cropping area, watermark, rotate, keeping the ratio.
Also worth mentioning is that, Thumbnailator still constantly updated, how kind, I feel very secure now!
Thumbnailator official website: http://code.google.com/p/thumbnailator/
Here we describe how to use the next Thumbnailator

Use Address:

http://blog.csdn.net/chenleixing/article/details/44685817

http://www.qzblog.net/blog/220

http://blog.csdn.net/wangpeng047/article/details/17610451

Thumbnail archive jar package

            <!-- 图片缩略图 -->
            <dependency>
                <groupId>net.coobird</groupId>
                <artifactId>thumbnailator</artifactId>
                <version>0.4.8</version>
            </dependency>

 

The size specified image to zoom (will follow the original aspect ratio)

        // the image to the specified size reduction and discharge (will follow the picture aspect ratio) 
        // Here the picture is pressed into a 400 × 500 thumbnail 
        Thumbnails.of (fromPic) .size (400,500) .toFile (toPic) ; // changed to 400 * 300, following the original proportions shrink or put a certain height 400 *

For reducing and enlarging the specified ratio

        // for scale reduction and enlargement 
        Thumbnails.of (fromPic) .scale (0.2f) .toFile (toPic); // scaled 
        Thumbnails.of (fromPic) .scale (2f) ; // scaled

Image dimensions remain unchanged, the compressed image file size

        // change the picture size, the compressed image file size outputQuality achieve, parameter 1 is the highest quality 
        Thumbnails.of (fromPic) .scale (1f) .outputQuality (0.25f) .toFile (toPic);

 

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Original Path: https://www.cnblogs.com/miskis/p/5500822.html