我遇到了JMagick库的奇怪问题。我使用Debian操作系统,因此已经安装了libjmagick6-java和libjmagick6-jni,并采取以下步骤:
请告诉我一些解决这个问题的想法。提前感谢!
- 我将“jmagick-6.6.9.jar”从“/usr/share/java/”复制到“$JAVA_HOME/jre/lib/ext/”。
- 我在以下位置设置了本地库位置“/usr/lib/jni”(即libJMagick.so):
- JRE系统库(在eclipse中)
- jmagick-6.6.9.jar(在eclipse中)
此外,我已经在简单的Java项目中测试了JMagick,它可以正常工作。但是,在第二个项目中,这是一个在Tomcat 6中运行的Web应用程序,它就无法正常工作。
下面是我的代码,可以工作,因此jmagick必须已经正确安装:
public class Main {
public static void main(String[] arg) {
MagickImage image = null;
ImageInfo imageInfo = null;
try {
imageInfo = new ImageInfo("/home/firzen/IMG_0120.JPG");
image = new MagickImage(imageInfo);
System.out.println(image.getDimension().width);
} catch (MagickException e) {
System.out.println(e);
}
image.destroyImages();
}
}
这是 webapp 中无法运行的代码:
public void init() {
ServletContext sc = getServletContext();
cacheHandlers = (Map<String, CacheContext>) sc.getAttribute("handlers");
Boolean applicationReady = (Boolean) sc.getAttribute("ready");
isReady = cacheHandlers != null && Boolean.TRUE.equals(applicationReady);
System.out.println("zde");
MagickImage image = null;
ImageInfo imageInfo = null;
try {
imageInfo = new ImageInfo("/home/firzen/IMG_0120.JPG");
image = new MagickImage(imageInfo);
System.out.println(image.getDimension().width);
} catch (MagickException e) {
System.out.println(e);
}
image.destroyImages();
}
最后,这是上述代码抛出的异常:
java.lang.UnsatisfiedLinkError: no JMagick in java.library.path
at java.lang.ClassLoader.loadLibrary(Unknown Source)
at java.lang.Runtime.loadLibrary0(Unknown Source)
at java.lang.System.loadLibrary(Unknown Source)
at magick.Magick.<clinit>(Magick.java:18)
at cz.bach.mrimage.MrImageSrv.init(MrImageSrv.java:44)
at javax.servlet.GenericServlet.init(GenericServlet.java:212)
at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1173)
at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:809)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:129)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:563)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:554)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Unknown Source)
请告诉我一些解决这个问题的想法。提前感谢!
libJMagick.so
绝对在java.library.path
中,它的依赖项也是如此,但当它尝试加载类时,我仍然得到了UnsatisfiedLinkError
。 - coladict