ImageIO解析TIF转为JPEG

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static{
IIORegistry registry = IIORegistry.getDefaultInstance();
registry.registerServiceProvider(new com.sun.media.imageioimpl.plugins.tiff.TIFFImageWriterspi());
registry.registerServiceProvider(new com.sun.media.imageioimpl.plugins.tiff.TIFFImageReaderspi();
}

另一种方式，META-INF/service下已经有了服务注册的信息，没有注册上是由于maven打包的时候使用覆盖的方式，有重名的文件会覆盖。使用maven插件可以避免此问题。

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<plugin>				
	<groupId>org.apache.maven.plugins</groupId>
				<artifactId>maven-shade-plugin</artifactId>
				<version>2.0</version>
				<executions>
					<execution>
						<phase>package</phase>
						<goals>
							<goal>shade</goal>
						</goals>
						<configuration>
							<transformers>
							    <transformer
							implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer">
									<resource>META-INF/services/javax.imageio.spi.ImageReaderSpi</resource>
								</transformer>
							</transformers>
						</configuration>
					</execution>
				</executions>
			</plugin>