图片文件格式转换最核心的问题就是要解决各种图片格式的编码和解码，推荐用jimi包，可从 http://java.sun.com/products/jimi/ 下载该包及其源码和demo



　　需要注意的是：jimi提供了对几乎所有图片格式的解码支持，但是为提供gif和tif/tiff格式的编码api，gif编码问题在网上可以找到县相关的源码，tiff好像jai:http://java.sun.com/products/java-media/jai/index.jsp提供了它的编码，不过我没有用jai，暂时用jpeg编码代替了。



　　察看jimi的源码，在com.sun.jimi.core中是jimi的核心处理api。-Image file format conversion crux of the problem is to solve a variety of image formats of encoding and decoding, recommended by jimi package can be downloaded from the http://java.sun.com/products/jimi/ package and its source code and demo of the need for Note: jimi provides decoding of virtually all image formats support, but to provide gif and tif/tiff format encoding api, gif encoding issues related to the Internet can find the source counties, tiff like jai: http://java .sun.com/products/java-media/jai/index.jsp to provide its code, but I did not use jai, temporarily replaced with the jpeg encoding. View jimi' s source code is in the com.sun.jimi.core jimi core processing api.