在JNI代码中引发异常的最佳方法？

我们只是为要抛出的每种异常类型编写实用程序方法。这里有些例子：

jint throwNoClassDefError( JNIEnv *env, char *message ){    jclass exClass;    char *className = "java/lang/NoClassDefFoundError";    exClass = (*env)->FindClass( env, className);    if (exClass == NULL) {        return throwNoClassDefError( env, className );    }    return (*env)->ThrowNew( env, exClass, message );}jint throwNoSuchMethodError(        JNIEnv *env, char *className, char *methodName, char *signature ){    jclass exClass;    char *exClassName = "java/lang/NoSuchMethodError" ;    LPTSTR msgBuf;    jint retCode;    size_t nMallocSize;    exClass = (*env)->FindClass( env, exClassName );    if ( exClass == NULL ) {        return throwNoClassDefError( env, exClassName );    }    nMallocSize = strlen(className)  + strlen(methodName) + strlen(signature) + 8;    msgBuf = malloc( nMallocSize );    if ( msgBuf == NULL ) {        return throwOutOfMemoryError     ( env, "throwNoSuchMethodError: allocating msgBuf" );    }    memset( msgBuf, 0, nMallocSize );    strcpy( msgBuf, className );    strcat( msgBuf, "." );    strcat( msgBuf, methodName );    strcat( msgBuf, "." );    strcat( msgBuf, signature );    retCode = (*env)->ThrowNew( env, exClass, msgBuf );    free ( msgBuf );    return retCode;}jint throwNoSuchFieldError( JNIEnv *env, char *message ){    jclass exClass;    char *className = "java/lang/NoSuchFieldError" ;    exClass = (*env)->FindClass( env, className );    if ( exClass == NULL ) {        return throwNoClassDefError( env, className );    }    return (*env)->ThrowNew( env, exClass, message );}jint throwOutOfMemoryError( JNIEnv *env, char *message ){    jclass exClass;    char *className = "java/lang/OutOfMemoryError" ;    exClass = (*env)->FindClass( env, className );    if ( exClass == NULL ) {        return throwNoClassDefError( env, className );    }    return (*env)->ThrowNew( env, exClass, message );}

这样，很容易找到它们，您的代码完成编辑器将帮助您键入它们，并且您可以传递简单的参数。

我确信您可以扩展它来处理链式异常或其他更复杂的方法。这足以满足我们的需求。