无法让JMagick工作

时间:2014-12-04 13:16:00

标签: java eclipse tomcat jmagick

我对JMagick库有一些奇怪的问题。我使用Debian,所以我安装了libjmagick6-java和libjmagick6-jni,这是我已经完成的步骤:

  • 我已将jmagick-6.6.9.jar/usr/share/java/复制到$JAVA_HOME/jre/lib/ext/
  • 我已将/usr/lib/jni(其中libJMagick.so)设置为本机库位置:
    • 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并且它可以工作,但是在Tomcat 6中运行的第二个项目是Web应用程序,它只是不起作用..

以下是我的代码 WORKS - 所以必须正确安装jmagick:

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();
    }
}

以下是webapp中的代码 NOT WORKING

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,这是所提到的代码抛出的异常:

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)

请告诉我如何解决这个问题的一些想法..提前致谢!

1 个答案:

答案 0 :(得分:7)

我终于通过使用:

检查真正的java.library.path来解决这个问题
System.out.println("java.library.path is: " + System.getProperty("java.library.path"));

这给了我这个烂摊子:

java.library.path is: /opt/jdk1.7.0_45/jre/lib/i386/server:/opt/jdk1.7.0_45/jre/lib/i386:/opt/jdk1.7.0_45/jre/../lib/i386:/usr/lib/jvm/java-6-openjdk-i386/jre/lib/i386/client:/usr/lib/jvm/java-6-openjdk-i386/jre/lib/i386::/usr/java/packages/lib/i386:/lib:/usr/lib

最后你可以看到/ usr / lib,所以我在/ usr / lib中创建了libJMagick.so的链接:

ln -s /usr/lib/jni/libJMagick.so /usr/lib/libJMagick.so

享受! : - )