java.lang.NoClassDefFoundError：无法初始化类javax.media.jai.JAI [英] java.lang.NoClassDefFoundError: Could not initialize class javax.media.jai.JAI
问题描述
我最近开始使用GeoTools开始我的第一个程序，其中我也使用JAI-Java Advanced Imaging 1_1_2_01和JDK 1_7。 在添加GeoTiff Jars 之前一切正常。我发现以下错误
线程main中的异常java.lang.NoClassDefFoundError：无法初始化类javax.media.jai.JAI
at org.geotools.gce.geotiff.GeoTiffReader.read（GeoTiffReader.java:607）
at com.rgb.PixelExtractor.extract（PixelExtractor.java:55）
at com.rgb。 RGBSpliter.main（RGBSpliter.java:136）
代码如下
public void extract（File f，String name，String date）throws Exception {
ParameterValue< OverviewPolicy> policy = AbstractGridFormat.OVERVIEW_POLICY
.createValue（）;
policy.setValue（OverviewPolicy.IGNORE）;
//这基本上可以从磁盘上一次读取4个瓦片的数据...
ParameterValue< String> gridsize = AbstractGridFormat.SUGGESTED_TILE_SIZE.createValue（）;
//gridsize.setValue(512 * 4 +，+ 512）;
//设置读取类型：使用JAI ImageRead（true）或ImageReaders读取方法（false）
ParameterValue< Boolean> useJaiRead = AbstractGridFormat.USE_JAI_IMAGEREAD.createValue（）;
useJaiRead.setValue（true）;
//rereader.read（new GeneralParameterValue [] {policy，gridsize，useJaiRead}）;
//抛出错误的行
GridCoverage2D image
= new GeoTiffReader（f）.read（new GeneralParameterValue [] {policy，gridsize，useJaiRead}）;
Rectangle2D bounds2D = image.getEnvelope2D（）。getBounds2D（）;
bounds2D.getCenterX（）;
//计算图像的缩放级别
GridGeometry2D geometry = image.getGridGeometry（）;
BufferedImage img = ImageIO.read（f）;
// ColorModel colorModel = img.getColorModel（
WritableRaster raster = img.getRaster（）;
int numBands = raster.getNumBands（）;
int w = img.getWidth（）;
int h = img.getHeight（）;
outer：
for（int i = 0; i< w; i ++）{// width ...
for（int j = 0; j< h; j ++）{
double [] latlon = geo（geometry，i，j）;
double lat = latlon [0];
double lon = latlon [1];
Double s = 0d;
String originalBands =;
for（int k = 0; k< numBands; k ++）{
double d = raster.getSampleDouble（i，j，k）;
originalBands + = d +，;
s + = d;
}
originalBands = originalBands.substring（0，originalBands.length（） - 1）;
if（s.compareTo（0d） == 0）{
continue;
}
String geoHash = GeohashUtils.encodeLatLon（lat，lon）;
//这里用band，lat，long，geohash做一些事情等等....
}
}
}
private static double [] geo（GridGeometry2D geometry，int x，int y）抛出异常{
/ / int zoomlevel = 1;
Envelope2D pixelEnvelop = geometry.gridToWorld（new GridEnvelope2D（x，y，1,1））;
// pixelEnvelop.getCoordinateReferenceSystem（）。getName（）。getCodeSpace（）;
返回new double [] {pixelEnvelop.getCenterY（），pixelEnvelop.getCenterX（）};
}
}
JDK Jars
其他罐子
我还为GeoTools jar添加了classpath变量
<编辑：
我的jai在没有GeoTools Integration的情况下工作，但当我添加 gt-geotiff-14.4.jar 它试图添加 JAI-core-1.1.3.jar 哪些冲突机智h jai-core.jar 在我的JDK 1.7中。所以我删除了 JAI-core-1.1.3.jar 和相关的jar，但它仍然给我同样的错误。
最后，当我删除Geotiff时，它工作了 jai-core-1.1.3.jar ， jai-codec -1.1.3.jar 和 jai-imageio-1.1.jar 文件并为jai-ext的 gt-utility 类文件。我刚刚从github复制并添加到我项目的src。 gt-utility 是缺少的那个。这些罐子也很矛盾。
I recently started my first program with GeoTools in which i was also using JAI- Java Advanced Imaging 1_1_2_01 with JDK 1_7. It worked fine until I added GeoTiff Jars. I found following error
Exception in thread "main" java.lang.NoClassDefFoundError: Could not initialize class javax.media.jai.JAI at org.geotools.gce.geotiff.GeoTiffReader.read(GeoTiffReader.java:607) at com.rgb.PixelExtractor.extract(PixelExtractor.java:55) at com.rgb.RGBSpliter.main(RGBSpliter.java:136)
The Code is as below
public void extract(File f, String name, String date) throws Exception {
ParameterValue<OverviewPolicy> policy = AbstractGridFormat.OVERVIEW_POLICY
.createValue();
policy.setValue(OverviewPolicy.IGNORE);
// this will basically read 4 tiles worth of data at once from the disk...
ParameterValue<String> gridsize = AbstractGridFormat.SUGGESTED_TILE_SIZE.createValue();
//gridsize.setValue(512 * 4 + "," + 512);
// Setting read type: use JAI ImageRead (true) or ImageReaders read methods (false)
ParameterValue<Boolean> useJaiRead = AbstractGridFormat.USE_JAI_IMAGEREAD.createValue();
useJaiRead.setValue(true);
//reader.read(new GeneralParameterValue[] { policy, gridsize, useJaiRead });
// The line that throws error
GridCoverage2D image
= new GeoTiffReader(f).read(new GeneralParameterValue[]{policy, gridsize, useJaiRead});
Rectangle2D bounds2D = image.getEnvelope2D().getBounds2D();
bounds2D.getCenterX();
// calculate zoom level for the image
GridGeometry2D geometry = image.getGridGeometry();
BufferedImage img = ImageIO.read(f);
// ColorModel colorModel = img.getColorModel(
WritableRaster raster = img.getRaster();
int numBands = raster.getNumBands();
int w = img.getWidth();
int h = img.getHeight();
outer:
for (int i = 0; i < w; i++) {//width...
for (int j = 0; j < h; j++) {
double[] latlon = geo(geometry, i, j);
double lat = latlon[0];
double lon = latlon[1];
Double s = 0d;
String originalBands = "";
for (int k = 0; k < numBands; k++) {
double d = raster.getSampleDouble(i, j, k);
originalBands += d + ",";
s += d;
}
originalBands = originalBands.substring(0, originalBands.length() - 1);
if (s.compareTo(0d) == 0) {
continue;
}
String geoHash = GeohashUtils.encodeLatLon(lat, lon);
//here do something with the bands, lat, long, geohash, etc....
}
}
}
private static double[] geo(GridGeometry2D geometry, int x, int y) throws Exception {
//int zoomlevel = 1;
Envelope2D pixelEnvelop = geometry.gridToWorld(new GridEnvelope2D(x, y, 1, 1));
// pixelEnvelop.getCoordinateReferenceSystem().getName().getCodeSpace();
return new double[]{pixelEnvelop.getCenterY(), pixelEnvelop.getCenterX()};
}
}
JDK Jars
Other Jars
I also added classpath variable for GeoTools jars
Edit:
My jai is working without GeoTools Integration, but when I add gt-geotiff-14.4.jar it try to add JAI-core-1.1.3.jar which conflicts with jai-core.jar in my JDK 1.7. So I removed JAI-core-1.1.3.jar and related jars but still it gives me same error.
Finally it worked when I removed Geotiff jai-core-1.1.3.jar,jai-codec-1.1.3.jar and jai-imageio-1.1.jar files and added new class for jai-ext's gt-utility class files. I just copied from github and added to src of my project.gt-utility was the one which was missing. The jars were conflicting too.
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