Java的JNI错误java.lang.UnsatisfiedLinkError中：XXXX（）V [英] Java JNI error java.lang.UnsatisfiedLinkError: xxxx()V

问题描述

我有一个粗略的时间 JNI 今天，基本上是我想要做的就是整合 OpenAlpr 我的的Java 项目中，我使用precompiled二进制文件，当我运行 java_test.bat 文件，这工作完全。在第一个Java不停地告诉我，它无法找到 openAlprJni 然后我加入了路径的dll 我的构建路径和系统路径，在这之后我就开始经历了 openAlprJni.Alpr.initialize（Ljava /朗/字符串; Ljava /朗/字符串; Ljava /朗/字符串;）V 这根据文件意味着库本身是不正常的，但它是确定，因为测试程序运行过程中，我已经看过各种论坛，甚至跟 OpenAlpr 的作者，但仍然无法解决这个问题，有没有人在这里谁拥有了类似的问题，帮我解决这个问题？先谢谢了。

I have had a rough time with JNI today, basically what I want to do is integrate OpenAlpr to my Java project, I am using precompiled binaries which work perfectly when I run the java_test.bat file. At first Java kept on telling me it could not locate openAlprJni then I added the path to the dlls to my build path and system path, after which I started experiencing the openAlprJni.Alpr.initialize(Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V which according to documentation means the library itself is not ok, but it is ok since the test program is running, I have looked at various forums and even talked to the author of OpenAlpr but still cannot resolve this issue, is there anybody here who has had a similar problem help me fix this? thanks in advance.

推荐答案

请在<一看href=\"https://github.com/openalpr/openalpr/blob/master/src/bindings/java/src/com/openalpr/jni/Alpr.java\"相对=nofollow> com.openalpr.jni.Alpr 。在第12行找到：

Please have a look in com.openalpr.jni.Alpr. In line 12 you find:

private native void initialize(String country, String configFile, String runtimeDir);

此方法匹配于头部 com_openalpr_jni_Alpr.h ：

/*
 * Class:     com_openalpr_jni_Alpr
 * Method:    initialize
 * Signature: (Ljava/lang/String;Ljava/lang/String;Ljava/lang/String;)V
 */
JNIEXPORT void JNICALL Java_com_openalpr_jni_Alpr_initialize(JNIEnv *, jobject, jstring, jstring, jstring);

您将看到你正在体验只是这个初始化的方法签名方法，它返回无效和一个类型的三个参数 Ljava /朗/字符串;

You will see that what you are "experiencing" is just the method signature of this initialize method which returns void and takes three parameters of type Ljava/lang/String;.

您可能爆发的例子，当你添加到您的工作空间（检查包名）。请注意，在* .DLL你正在使用很可能对编制 com_openalpr_jni_Alpr ，而不是 jni_Alpr 。

You probably broke the examples when you added it into your workspace (check the package names). Please be aware, the *.dll you are using was probably compiled against com_openalpr_jni_Alpr and not jni_Alpr.

我认真地建议你去学习JNI的概念，这里你找到一个很好的起点。

I seriously recommend you to learn JNI concepts, here you find a good starting point.

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