ImageIO.read()读取tif文件时，报空指针异常，解决方式如下：

1、添加jai_imageio-1.0_01.jar

2、

IIORegistry registry = IIORegistry.getDefaultInstance();
registry.registerServiceProvider(new com.sun.media.imageioimpl.plugins.tiff.TIFFImageReaderSpi());
registry.registerServiceProvider(new com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriterSpi());