我正在尝试调用一种 native 方法,但我收到“java.lang.UnsatisfiedLinkError”。
Java 类:
public class CLS_NativeData {
private final static String sLibName = "NativeData.dll";
private native String getValue(int i);
private native void setValue(int i);
public CLS_NativeData() {
super();
}
static {
System.load(CLS_Globals.LIB_PATH + sLibName);
}
public String getData(int i) {
return getValue(i);
}
public void setData(int i) {
setValue(i);
}
}
C/C++ DLL 头文件
/* DO NOT EDIT THIS FILE - it is machine generated */
#include "jni.h"
/* Header for class pkg_main_CLS_NativeData */
#ifndef _Included_pkg_main_CLS_NativeData
#define _Included_pkg_main_CLS_NativeData
#ifdef __cplusplus
extern "C" {
#endif
/*
* Class: pkg_main_CLS_NativeData
* Method: getValue
* Signature: (I)Ljava/lang/String;
*/
JNIEXPORT jstring JNICALL Java_pkg_1main_CLS_1NativeData_getValue
(JNIEnv *, jobject, jint);
/*
* Class: pkg_main_CLS_NativeData
* Method: setValue
* Signature: (I)V
*/
JNIEXPORT void JNICALL Java_pkg_1main_CLS_1NativeData_setValue
(JNIEnv *, jobject, jint);
#ifdef __cplusplus
}
#endif
#endif
C/C++ DLL.cpp
JNIEXPORT jstring JNICALL Java_pkg_1main_CLS_1NativeData_getValue
(JNIEnv * env, jobject obj, jint i)
{
CoInit();
switch(i) {
case 0:
return env->NewStringUTF(getCPUInfo().c_str());
break;
case 1:
return env->NewStringUTF(getSystemInfo().c_str());
break;
case 2:
return env->NewStringUTF(getMachineInfo().c_str());
break;
case 3:
return env->NewStringUTF(getAntivirusInfo().c_str());
break;
case 4:
return env->NewStringUTF(getProcessList().c_str());
break;
default:
return env->NewStringUTF("ERROR");
}
}
// FAILED METHOD
JNIEXPORT void JNICALL Java_pkg_1main_CLS_1NativeData_setValue
(JNIEnv * env, jobject obj, jint i)
{
switch (i) {
case 0:
printf("Hola mundo\n");
break;
}
}
所以,当我调用第一个方法时,它工作得很好,但是当我调用第二个方法(void 方法)时,它失败了。
最佳答案
您的 Java 类的名称是 CLS_NativeData
。然而,在 C++ 中你写:
Java_pkg_1main_CLS_1NativeData_getValue
并且到处使用CLS_1NativeData
。它拼错了。因此类加载器无法在您的共享库中找到 native 方法并提示 java.lang.UnsatisfiedLinkError
。
关于java - JNI java.lang.UnsatisfiedLinkError,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/18173793/