有没有办法从C编译的库中使用和调用方法调用，比如PJSIP库？
我想使用和调用我编译过的pjsip lib中的调用，但显而易见的问题是pjsip是一个C库而不是一个java库，即一个jar文件。
可能？也许是JNI？
由于
编辑：尝试使用Swig来完成手头的任务，但它只是创建一个空的类文件。
这是我用来执行swig的命令：
swig -verbose -java -package com.josh.sip.util -o jni_wrapper.c pjsua.i
从swig命令输出
Language subdirectory: java
Search paths:
.\
.\swig_lib\java\
C:\Users\jonney\Downloads\swigwin-2.0.9\Lib\java\
.\swig_lib\
C:\Users\jonney\Downloads\swigwin-2.0.9\Lib\
Preprocessing...
Starting language-specific parse...
Processing types...
C++ analysis...
Generating wrappers...
它为我创建的pjsua java类：
/* ----------------------------------------------------------------------------
* This file was automatically generated by SWIG (http://www.swig.org).
* Version 2.0.9
*
* Do not make changes to this file unless you know what you are doing--modify
* the SWIG interface file instead.
* ----------------------------------------------------------------------------- */
package com.josh.sip.util;
public class pjsua {
}
它为我创建的pjsua jni文件
/* ----------------------------------------------------------------------------
* This file was automatically generated by SWIG (http://www.swig.org).
* Version 2.0.9
*
* Do not make changes to this file unless you know what you are doing--modify
* the SWIG interface file instead.
* ----------------------------------------------------------------------------- */
package com.josh.sip.util;
public class pjsuaJNI {
}
它在下面为我生成的jni_wrapper.c：
/* ----------------------------------------------------------------------------
* This file was automatically generated by SWIG (http://www.swig.org).
* Version 2.0.9
*
* This file is not intended to be easily readable and contains a number of
* coding conventions designed to improve portability and efficiency. Do not make
* changes to this file unless you know what you are doing--modify the SWIG
* interface file instead.
* ----------------------------------------------------------------------------- */
#define SWIGJAVA
/* -----------------------------------------------------------------------------
* This section contains generic SWIG labels for method/variable
* declarations/attributes, and other compiler dependent labels.
* ----------------------------------------------------------------------------- */
/* template workaround for compilers that cannot correctly implement the C++ standard */
#ifndef SWIGTEMPLATEDISAMBIGUATOR
# if defined(__SUNPRO_CC) && (__SUNPRO_CC <= 0x560)
# define SWIGTEMPLATEDISAMBIGUATOR template
# elif defined(__HP_aCC)
/* Needed even with `aCC -AA' when `aCC -V' reports HP ANSI C++ B3910B A.03.55 */
/* If we find a maximum version that requires this, the test would be __HP_aCC <= 35500 for A.03.55 */
# define SWIGTEMPLATEDISAMBIGUATOR template
# else
# define SWIGTEMPLATEDISAMBIGUATOR
# endif
#endif
/* inline attribute */
#ifndef SWIGINLINE
# if defined(__cplusplus) || (defined(__GNUC__) && !defined(__STRICT_ANSI__))
# define SWIGINLINE inline
# else
# define SWIGINLINE
# endif
#endif
/* attribute recognised by some compilers to avoid 'unused' warnings */
#ifndef SWIGUNUSED
# if defined(__GNUC__)
# if !(defined(__cplusplus)) || (__GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4))
# define SWIGUNUSED __attribute__ ((__unused__))
# else
# define SWIGUNUSED
# endif
# elif defined(__ICC)
# define SWIGUNUSED __attribute__ ((__unused__))
# else
# define SWIGUNUSED
# endif
#endif
#ifndef SWIG_MSC_UNSUPPRESS_4505
# if defined(_MSC_VER)
# pragma warning(disable : 4505) /* unreferenced local function has been removed */
# endif
#endif
#ifndef SWIGUNUSEDPARM
# ifdef __cplusplus
# define SWIGUNUSEDPARM(p)
# else
# define SWIGUNUSEDPARM(p) p SWIGUNUSED
# endif
#endif
/* internal SWIG method */
#ifndef SWIGINTERN
# define SWIGINTERN static SWIGUNUSED
#endif
/* internal inline SWIG method */
#ifndef SWIGINTERNINLINE
# define SWIGINTERNINLINE SWIGINTERN SWIGINLINE
#endif
/* exporting methods */
#if (__GNUC__ >= 4) || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
# ifndef GCC_HASCLASSVISIBILITY
# define GCC_HASCLASSVISIBILITY
# endif
#endif
#ifndef SWIGEXPORT
# if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
# if defined(STATIC_LINKED)
# define SWIGEXPORT
# else
# define SWIGEXPORT __declspec(dllexport)
# endif
# else
# if defined(__GNUC__) && defined(GCC_HASCLASSVISIBILITY)
# define SWIGEXPORT __attribute__ ((visibility("default")))
# else
# define SWIGEXPORT
# endif
# endif
#endif
/* calling conventions for Windows */
#ifndef SWIGSTDCALL
# if defined(_WIN32) || defined(__WIN32__) || defined(__CYGWIN__)
# define SWIGSTDCALL __stdcall
# else
# define SWIGSTDCALL
# endif
#endif
/* Deal with Microsoft's attempt at deprecating C standard runtime functions */
#if !defined(SWIG_NO_CRT_SECURE_NO_DEPRECATE) && defined(_MSC_VER) && !defined(_CRT_SECURE_NO_DEPRECATE)
# define _CRT_SECURE_NO_DEPRECATE
#endif
/* Deal with Microsoft's attempt at deprecating methods in the standard C++ library */
#if !defined(SWIG_NO_SCL_SECURE_NO_DEPRECATE) && defined(_MSC_VER) && !defined(_SCL_SECURE_NO_DEPRECATE)
# define _SCL_SECURE_NO_DEPRECATE
#endif
/* Fix for jlong on some versions of gcc on Windows */
#if defined(__GNUC__) && !defined(__INTEL_COMPILER)
typedef long long __int64;
#endif
/* Fix for jlong on 64-bit x86 Solaris */
#if defined(__x86_64)
# ifdef _LP64
# undef _LP64
# endif
#endif
#include <jni.h>
#include <stdlib.h>
#include <string.h>
/* Support for throwing Java exceptions */
typedef enum {
SWIG_JavaOutOfMemoryError = 1,
SWIG_JavaIOException,
SWIG_JavaRuntimeException,
SWIG_JavaIndexOutOfBoundsException,
SWIG_JavaArithmeticException,
SWIG_JavaIllegalArgumentException,
SWIG_JavaNullPointerException,
SWIG_JavaDirectorPureVirtual,
SWIG_JavaUnknownError
} SWIG_JavaExceptionCodes;
typedef struct {
SWIG_JavaExceptionCodes code;
const char *java_exception;
} SWIG_JavaExceptions_t;
static void SWIGUNUSED SWIG_JavaThrowException(JNIEnv *jenv, SWIG_JavaExceptionCodes code, const char *msg) {
jclass excep;
static const SWIG_JavaExceptions_t java_exceptions[] = {
{ SWIG_JavaOutOfMemoryError, "java/lang/OutOfMemoryError" },
{ SWIG_JavaIOException, "java/io/IOException" },
{ SWIG_JavaRuntimeException, "java/lang/RuntimeException" },
{ SWIG_JavaIndexOutOfBoundsException, "java/lang/IndexOutOfBoundsException" },
{ SWIG_JavaArithmeticException, "java/lang/ArithmeticException" },
{ SWIG_JavaIllegalArgumentException, "java/lang/IllegalArgumentException" },
{ SWIG_JavaNullPointerException, "java/lang/NullPointerException" },
{ SWIG_JavaDirectorPureVirtual, "java/lang/RuntimeException" },
{ SWIG_JavaUnknownError, "java/lang/UnknownError" },
{ (SWIG_JavaExceptionCodes)0, "java/lang/UnknownError" }
};
const SWIG_JavaExceptions_t *except_ptr = java_exceptions;
while (except_ptr->code != code && except_ptr->code)
except_ptr++;
(*jenv)->ExceptionClear(jenv);
excep = (*jenv)->FindClass(jenv, except_ptr->java_exception);
if (excep)
(*jenv)->ThrowNew(jenv, excep, msg);
}
/* Contract support */
#define SWIG_contract_assert(nullreturn, expr, msg) if (!(expr)) {SWIG_JavaThrowException(jenv, SWIG_JavaIllegalArgumentException, msg); return nullreturn; } else
#include "pjsua.h"
#ifdef __cplusplus
extern "C" {
#endif
#ifdef __cplusplus
}
#endif
我的pjsua.h文件位于与我的.i文件相同的位置，因此在执行swig命令和任何建议时更容易找到它们吗？
我基本上想要swig或任何其他工具来创建一个pjsua或pjsip java类，其中包含我可以用来实际使用该库的所有实现或接口方法。
比如没有这个sip堆栈的java版本的痛苦
答案 0 :(得分：3)
我发现最简单的方法是使用SWIG，如果你有头文件。您为模块（库）创建yourmodule.i文件，并包含您要通过JNI访问的所有类。 E.g：
%module Foo
%{
#include "Bar.h"
%}
您还可以提供从C到Java结构的文字映射。
如果你想忽略某种方法：
%ignore fooBar(int baz);
你可以运行swig来生成一些像这样的java类：
swig -c -verbose -java -package com.your.java.package -o jni_wrapper.c yourfile.i
有关更多信息和示例，请参阅Java documentation。
答案 1 :(得分：3)
使用JNAerator尝试JNA：https://code.google.com/p/jnaerator。我在自己的项目中成功使用过它。
答案 2 :(得分：2)