跪求懂封装java可用的dll的大牛进来！封装别人的dll为java可用的dll，二次封装哦！

public class TestNativeDemo {
  
    // 声明本地方法
    public native String testJni(String arg);
     
    public native int FPBegin();
  
    static {
        // 加载DLL文件
        System.loadLibrary("TestNativeDemoCPP");
    }
  
    public static void main(String args[]) {
        TestNativeDemo ob = new TestNativeDemo();
        // 调用本地方法
        String result = ob.testJni("Hello,Jni"); // call a native method
        int res = ob.FPBegin();
        System.out.println("TestNativeDemo...testJni=" + result + "//" + res);
    }
}
//上面是我的生成dll的java代码，然后用javac编译，用javah生成头文件。

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
/* Header for class TestNativeDemo */
 
#ifndef _Included_TestNativeDemo
#define _Included_TestNativeDemo
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     TestNativeDemo
 * Method:    testJni
 * Signature: (Ljava/lang/String;)Ljava/lang/String;
 */
JNIEXPORT jstring JNICALL Java_TestNativeDemo_testJni
  (JNIEnv *, jobject, jstring);
 
/*
 * Class:     TestNativeDemo
 * Method:    FPBegin
 * Signature: ()I
 */
JNIEXPORT jint JNICALL Java_TestNativeDemo_FPBegin
  (JNIEnv *, jobject);
 
#ifdef __cplusplus
}
#endif
#endif
//上面是我的TestNativeDemo.h代码

// TestNativeDemoCpp.cpp : Defines the exported functions for the DLL application.
//
 
#include "stdafx.h"
 
#include <stdio.h>
#include <string> 
#include <TCHAR.H>
 
using namespace std;
 
HINSTANCE otherDll = NULL;
 
JNIEXPORT jstring JNICALL Java_TestNativeDemo_testJni (JNIEnv *env,jobject obj,jstring pString){
 
    const char *nativeString = env->GetStringUTFChars(pString, 0); 
     
    if (otherDll != NULL)
    {
        if(otherDll) FreeLibrary(otherDll);
    }
    otherDll = NULL;
    otherDll = LoadLibrary(_T("otherDll.dll"));
    HINSTANCE IDFP_hdll = otherDll;
    if (NULL != IDFP_hdll)
    {  
         if (NULL == GetProcAddress(IDFP_hdll, "FP_Begin")){ 
 
             nativeString =  "-1加载库失败";
         } else {
             nativeString =  "0成功！";
         }
    }  
    else
    {
        nativeString =  "-1加载库失败";
         
    }
 
  
    //从jstring中获取本地方法传递的字符串
  
      
  
     printf("%s", nativeString); 
  
     //DON'T FORGET THIS LINE!!! 
     env->ReleaseStringUTFChars(pString, nativeString); 
  
     return pString;
}
 
JNIEXPORT jint JNICALL Java_TestNativeDemo_FPBegin (JNIEnv *evn, jobject obj) {
    int i = 0;
    if (otherDll != NULL)
    {
        if(otherDll) FreeLibrary(otherDll);
    }
    otherDll = NULL;
    otherDll = LoadLibrary(_T("otherDll.dll"));
    HINSTANCE IDFP_hdll = otherDll;
    if (NULL != IDFP_hdll)
    {  
         if (NULL == GetProcAddress(IDFP_hdll, "FP_Begin")){
             i = 2;
         } else {
             i = 0;
         }
    }  
    else
    {
        i =  1;
         
    }
 
    return (jint)i;
}
 
//上面是我的TestNativeDemoCpp.cpp代码otherDll是别人提供给我的一个dll，我要生成一个dll调用他的dll

//然后执行java TestNativeDemo命令
0成功！Exception in thread "main" java.lang.UnsatisfiedLinkError: TestNativeDemo.FPBegin<>I
  at TestNativeDemo.FPBegin<Native Method>
  at TestNativeDemo.main<TestNativeDemo.java:22>
 
//上面代码可以看到我其他的部分暂时都没错了，但是我自己定义的FPBegin调用的话就告诉我没有这个方法，你们说怎么回事呢？而且它生成的.h里面原来在我的自己的函数前面是自带一个_1的，不知道为什么。

分不够可以加哦！

[解决办法]
帮忙顶一下！支持！
[解决办法]

jcharArray c ;//传入参数jcharArray类型
unsiged char code = new char[4];//第三方dll需要传递一个code数组进去
env->GetByteArrayRegion(c,0,4,code);
otherDllFunc(code);//调用第三方函数