关于java使用geotools中的GeoTiffReader读取tif图像时报错：找不到类 javax.media.jai.PlanarImage 的错误

代码放上：

import java.io.File;

import org.geotools.coverage.grid.GridCoverage2D;

import org.geotools.gce.geotiff.GeoTiffReader;

import org.geotools.geometry.Envelope2D;

import org.opengis.referencing.crs.CoordinateReferenceSystem;

public class ImageExt {

public static void main(String[] args) {

GetImageExt("E:\\database\\overview\\\\J46\\J46D001001.tif");

}

public static String GetImageExt(String strImageUrl){

String strExtent = "";

try {

String ImageUrl=strImageUrl.replace("\", "\\\");;

File ImageFile=new File(ImageUrl);

GeoTiffReader reader=new GeoTiffReader(ImageFile);

GridCoverage2D coverage = reader.read(null);

CoordinateReferenceSystem crs = coverage.getCoordinateReferenceSystem2D();

Envelope2D coverageEnvelope = coverage.getEnvelope2D();

double coverageMinX = coverageEnvelope.getBounds().getMinX();

double coverageMaxX = coverageEnvelope.getBounds().getMaxX();

double coverageMinY = coverageEnvelope.getBounds().getMinY();

double coverageMaxY = coverageEnvelope.getBounds().getMaxY();

} catch (Exception e) {

// TODO: handle exception

}

System.out.println(coverageMinX);

return strExtent;

}

}

报错：

Exception in thread “main” java.lang.NoClassDefFoundError:

javax/media/jai/ImageLayout at

zy3dms.ImageExt.GetImageExt(ImageExt.java:18) at

zy3dms.ImageExt.main(ImageExt.java:11) Caused by:

java.lang.ClassNotFoundException: javax.media.jai.ImageLayout at

java.net.URLClassLoader.findClass(URLClassLoader.java:381) at

java.lang.ClassLoader.loadClass(ClassLoader.java:424) at

sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331) at

java.lang.ClassLoader.loadClass(ClassLoader.java:357) … 2 more

我不解的是两个工程同样的类，一个运行正常，一个报错。