Imaging (previously called Sanselan)是Apache开源组织提供的用于操作图像的工具包。我们可以通过该包中提供的Sanselan很方便的获取图片信息以及存储保存工作。这个项目目前还属于孵化中的项目，尚未正式发布，我们直接上代码：
package com.gujin.sanselan; import java.io.File; import org.apache.sanselan.ImageInfo; import org.apache.sanselan.Sanselan; import org.junit.Test; public class SanselanTest { @Test public void test() throws Exception { File imageFile = new File("file/bg.png"); // 判断文件是否存在 System.out.println(Sanselan.hasImageFileExtension(imageFile)); System.out.println("======================================="); // 获得图片结构描述 System.out.println(Sanselan.dumpImageFile(imageFile)); System.out.println("======================================="); // 获得图片信息 ImageInfo imageInfo = Sanselan.getImageInfo(imageFile); System.out.println(imageInfo.getColorTypeDescription()); System.out.println(imageInfo.getFormatName()); System.out.println(imageInfo.getMimeType()); System.out.println("======================================="); // 获得图片尺寸 System.out.println(Sanselan.getImageSize(imageFile)); System.out.println("======================================="); System.out.println(Sanselan.guessFormat(imageFile)); } } 1234567891011121314151617181920212223242526272829303132 1234567891011121314151617181920212223242526272829303132运行结果如下：
true ======================================= Format Details: Png Bits Per Pixel: 32 Comments: 0 Format: PNG Format Name: PNG Portable Network Graphics Compression Algorithm: PNG Filter Height: 285 MimeType: image/png Number Of Images: 1 Physical Height Dpi: -1 Physical Height Inch: -1.0 Physical Width Dpi: -1 Physical Width Inch: -1.0 Width: 286 Is Progressive: false Is Transparent: false Color Type: RGB Uses Palette: false Color: RGB w/ alpha chunks: 13 0: : 'IHDR' 1: : 'IDAT' 2: : 'IDAT' 3: : 'IDAT' 4: : 'IDAT' 5: : 'IDAT' 6: : 'IDAT' 7: : 'IDAT' 8: : 'IDAT' 9: : 'IDAT' 10: : 'IDAT' 11: : 'IDAT' 12: : 'IEND' ======================================= RGB PNG Portable Network Graphics image/png ======================================= java.awt.Dimension[width=286,height=285] ======================================= {PNG: PNG} 123456789101112131415161718192021222324252627282930313233343536373839404142434445 123456789101112131415161718192021222324252627282930313233343536373839404142434445