c++通过jni调用java ，调用cmd执行脚本等类

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今天列出一个自己写的jni类，主要是自己当时c++要调用java程序

#pragma once#include "jni.h"class JNIOperator{public:JNIOperator(void);~JNIOperator(void);private:BOOL ReadJVMDLLPath(TCHAR tJvmDllPath[MAX_PATH]);BOOL ReadClassPath(TCHAR tClassPath[MAX_PATH]);BOOL ReadLibPath(TCHAR tLibPath[MAX_PATH]);BOOL ReadClassConfigPath(TCHAR tClassPath[MAX_PATH]);/*C字符串转JNI字符串*/ jstring stringtoJstring(JNIEnv* env, const char* pat);/*JNI字符串转C字符串*/   char* jstringTostring(JNIEnv* env, jstring jstr);  public:BOOL JNIInit();BOOL JNIClose();BOOL JNIFindClass();BOOL JNIGetAndExecuteBooleanMethod();BOOL JNIGetAndExecuteStaticBooleanMethod();string JNIGetAndExecuteStringMethod();  string JNIGetAndExecuteStringParamMethod(string str,int jk);void JNIGetAndExecuteStaticMainMethod(string str);//([Ljava/lang/String;)Vvoid JNIDeinit();void ExeBat();void ExeNode1();void ExeNode2();BOOL ReadJavaExePath(TCHAR tJavaExePath[MAX_PATH]);private:string classpath;protected:static JNIEnv* env;static JavaVM* jvm;static jclass cls;};extern JNIOperator jni;

//下面是cpp实现

#include "stdafx.h"#include "JNIOperator.h"#include "UnicodeToAscii.h"//声明全局变量JNIEnv*JNIOperator::env=NULL;JavaVM*JNIOperator::jvm=NULL;jclass JNIOperator::cls=NULL;#ifdef tuoli//定义一个函数指针，下面用来指向JVM中的JNI_CreateJavaVM函数  typedef jint (WINAPI *PFunCreateJavaVM)(JavaVM **, void **, void *); HINSTANCE hInstance=NULL;#endifJNIOperator jni;//256/512,xms和xmx的值最好一样，在服务器上面。否则容易造成内存溢出//最小内存  static char MinMB[] = "-Xms1024M";  //最大内存  static char MaxMB[] = "-Xmx1024M";  JNIOperator::JNIOperator(void){}JNIOperator::~JNIOperator(void){JNIDeinit();}void JNIOperator::JNIDeinit(){JNIClose();#ifdef tuoli::FreeLibrary(hInstance);#endif}/*C字符串转JNI字符串*/   jstring JNIOperator::stringtoJstring(JNIEnv* env, const char* pat)   {   jclass strClass = env->FindClass("Ljava/lang/String;");   jmethodID ctorID = env->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V");   jbyteArray bytes = env->NewByteArray(strlen(pat));   env->SetByteArrayRegion(bytes, 0, strlen(pat), (jbyte*)pat);   jstring encoding = env->NewStringUTF("utf-8");   jstring rstStr =(jstring) env->NewObject(strClass, ctorID, bytes, encoding);  return rstStr;  }  char* JNIOperator::jstringTostring(JNIEnv* env, jstring jstr)   {   char* rtn = NULL;   jclass clsstring = env->FindClass("java/lang/String");   jstring strencode = env->NewStringUTF("utf-8");   jmethodID mid = env->GetMethodID(clsstring, "getBytes", "(Ljava/lang/String;)[B"); jbyteArray barr= (jbyteArray)env->CallObjectMethod(jstr, mid, strencode);   jsize alen = env->GetArrayLength(barr);   jbyte* ba = env->GetByteArrayElements(barr, JNI_FALSE);   if (alen > 0)   {   rtn = (char*)malloc(alen + 1);   memcpy(rtn, ba, alen);   rtn[alen] = 0;   }   env->ReleaseByteArrayElements(barr, ba, 0);   return rtn;   }   BOOL JNIOperator::ReadClassPath(TCHAR tClassPath[MAX_PATH]){TCHAR FPath[MAX_PATH];ZeroMemory(FPath,sizeof(FPath));::GetCurrentDirectory(MAX_PATH, FPath);lstrcat(FPath, L"\\Config.ini");GetPrivateProfileString(L"CLASSPATH", L"classpath", L"", tClassPath, MAX_PATH, FPath);if(!lstrlen(tClassPath)){return FALSE;}return TRUE;}BOOL JNIOperator::ReadLibPath(TCHAR tLibPath[MAX_PATH]){TCHAR FPath[MAX_PATH];ZeroMemory(FPath,sizeof(FPath));::GetCurrentDirectory(MAX_PATH, FPath);lstrcat(FPath, L"\\Config.ini");GetPrivateProfileString(L"LIBPATH", L"libpath", L"", tLibPath, MAX_PATH, FPath);if(!lstrlen(tLibPath)){return FALSE;}return TRUE;}BOOL JNIOperator::JNIClose(){env->DeleteLocalRef(cls);if (!jvm->DestroyJavaVM()){return TRUE;}return FALSE;}BOOL JNIOperator::JNIInit(){TCHAR tClassPath[MAX_PATH];ZeroMemory(tClassPath,sizeof(tClassPath));if (!ReadClassPath(tClassPath)){return FALSE;}TCHAR tLibPath[MAX_PATH];ZeroMemory(tLibPath,sizeof(tLibPath));if (!ReadLibPath(tLibPath)){return FALSE;}JavaVMOption options[8];  JavaVMInitArgs vm_args;  long status;  jclass cls;  jmethodID mid;  jint square;  jboolean not;UnicodeToAscii u2a;   //options[0].optionString = "-Djava.compiler=NONE";char* pLibPath=u2a.WcharToChar(tLibPath);   cout<<pLibPath<<endl; options[1].optionString = pLibPath;//options[1].optionString = "-Djava.library.path=.";char* pClassPath=u2a.WcharToChar(tClassPath);   cout<<pClassPath<<endl;  options[2].optionString = pClassPath;//options[2].optionString = "-Djava.class.path=C:\\Program Files\\Java\\jdk1.7.0_80\\jre\\bin\\server\\testc.jar";options[3].optionString = "-verbose";//设置JVM最大允许分配的堆内存，按需分配  options[4].optionString = MinMB;  //-Xmx1200m -XX:MaxPermSize=512moptions[5].optionString = MaxMB;  //-Xmx1200m -XX:MaxPermSize=512m//modify at 2017-4-10options[6].optionString = "-XX:NewRatio=1";options[7].optionString = "-XX:MaxGCPauseMillis=28";//memset(&vm_args, 0, sizeof(vm_args));  vm_args.version = JNI_VERSION_1_8;  vm_args.nOptions = 8;  vm_args.options = options;  vm_args.ignoreUnrecognized = JNI_TRUE;#ifdef tuoli//定义一个函数指针，下面用来指向JVM中的JNI_CreateJavaVM函数  typedef jint (WINAPI *PFunCreateJavaVM)(JavaVM **, void **, void *);  //加载JVM.DLL动态库  测试exe脱离jre同一级目录限制测试 //string pPath="C://Program Files//Java//jdk1.7.0_80//jre//bin//server//jvm.dll";//借用strcpy将const char* 转换为char *//char *buf = new char[strlen(pPath.c_str())+1];//strcpy(buf, pPath.c_str());//TCHAR* ppPath=u2a.CharToWchar(buf);   TCHAR ppPath[MAX_PATH];ZeroMemory(ppPath,sizeof(ppPath));if (!ReadJVMDLLPath(ppPath)){return FALSE;}HINSTANCE hInstance = ::LoadLibrary(ppPath);  if (hInstance == NULL)  {  return false;  }  //取得里面的JNI_CreateJavaVM函数指针  PFunCreateJavaVM funCreateJavaVM = (PFunCreateJavaVM)::GetProcAddress(hInstance, "JNI_CreateJavaVM");  //调用JNI_CreateJavaVM创建虚拟机  status = (*funCreateJavaVM)(&jvm, (void**)&env, &vm_args);  #elsestatus = JNI_CreateJavaVM(&jvm, (void**)&env, &vm_args);#endifif (status!=JNI_ERR){return TRUE;}return FALSE;}BOOL JNIOperator::ReadClassConfigPath(TCHAR tClassConfigPath[MAX_PATH]){TCHAR FPath[MAX_PATH];ZeroMemory(FPath,sizeof(FPath));::GetCurrentDirectory(MAX_PATH, FPath);lstrcat(FPath, L"\\Config.ini");GetPrivateProfileString(L"CLASSCONFIGPATH", L"classconfigpath", L"", tClassConfigPath, MAX_PATH, FPath);if(!lstrlen(tClassConfigPath)){return FALSE;}return TRUE;}BOOL JNIOperator::JNIFindClass(){TCHAR tClassConfigPath[MAX_PATH];ZeroMemory(tClassConfigPath,sizeof(tClassConfigPath));if (!ReadClassConfigPath(tClassConfigPath)){return FALSE;}UnicodeToAscii u2a;   char* pClassConfigPath=u2a.WcharToChar(tClassConfigPath);   cout<<pClassConfigPath<<endl;  cls=env->FindClass(pClassConfigPath);if (cls!=0){cout<<"find class successful!"<<endl;return TRUE;}return FALSE;}BOOL JNIOperator::JNIGetAndExecuteBooleanMethod(){jmethodID mid;  jboolean not;  //根据类的CLASS对象获取该类的实例  jobject obj = env->AllocObject(cls);  mid = env->GetMethodID(cls,"booleanMethodA","()Z"); // if(mid !=0)  {    not=env->CallBooleanMethod(obj,mid);printf("Result of booleanMethod:%d\n", not);  //释放资源env->DeleteLocalRef(obj);//return TRUE;}  return FALSE;}BOOL JNIOperator::JNIGetAndExecuteStaticBooleanMethod(){jmethodID mid;  jboolean not;  mid = env->GetStaticMethodID(cls, "booleanMethod", "(Z)Z") ; if(mid !=0)  {    not = env->CallStaticBooleanMethod(cls, mid, 1);  printf("Result of staticbooleanMethod: %d\n", not);  return TRUE;}  return FALSE;}BOOL JNIOperator::ReadJVMDLLPath(TCHAR tJvmDllPath[MAX_PATH]){TCHAR FPath[MAX_PATH];ZeroMemory(FPath,sizeof(FPath));::GetCurrentDirectory(MAX_PATH, FPath);lstrcat(FPath, L"\\Config.ini");GetPrivateProfileString(L"DLLPATH", L"dllpath", L"", tJvmDllPath, MAX_PATH, FPath);if(!lstrlen(tJvmDllPath)){return FALSE;}return TRUE;}string JNIOperator::JNIGetAndExecuteStringMethod(){jmethodID mid;  //根据类的CLASS对象获取该类的实例  jobject obj = env->AllocObject(cls);  mid=env->GetMethodID(cls,"getMessage","()Ljava/lang/String;");if (mid!=0){jstring msg = (jstring)env->CallObjectMethod(obj, mid); string pmsg=jstringTostring(env, msg);//unicode工程，需要转换才能显示UnicodeToAscii u2a;   //借用strcpy将const char* 转换为char *char *buf = new char[strlen(pmsg.c_str())+1];strcpy(buf, pmsg.c_str());TCHAR* pmsgtemp=u2a.CharToWchar(buf);   cout<<pmsgtemp<<endl;  wprintf(L"getMessage=%s\n",pmsgtemp);//printf("getMessage=%s\n",pmsg.c_str());//释放资源env->DeleteLocalRef(msg);//return pmsg;}return "";}string JNIOperator::JNIGetAndExecuteStringParamMethod(string str,int jk){jmethodID mid;  //根据类的CLASS对象获取该类的实例  jobject obj = env->AllocObject(cls);  mid=env->GetMethodID(cls,"getMessageA","(Ljava/lang/String;I)Ljava/lang/String;");if (mid!=0){jstring msg = (jstring)env->CallObjectMethod(obj, mid,stringtoJstring(env,str.c_str()),jk);   string pmsg=jstringTostring(env, msg);printf("getMessageA=%s\n",pmsg.c_str());//释放资源env->DeleteLocalRef(msg);//return pmsg;}return "";}void JNIOperator::JNIGetAndExecuteStaticMainMethod(string str){//jmethodID mid;   mid = env->GetStaticMethodID(cls, "main", "([Ljava/lang/String;)V") ; if(mid !=0)  {    env->CallStaticVoidMethod(cls, mid, "");  printf("main exec success\n");}  else{printf("main exec failer\n");}}BOOL JNIOperator::ReadJavaExePath(TCHAR tJavaExePath[MAX_PATH]){TCHAR FPath[MAX_PATH];ZeroMemory(FPath,sizeof(FPath));::GetCurrentDirectory(MAX_PATH, FPath);lstrcat(FPath, L"\\Config.ini");GetPrivateProfileString(L"JAVAEXEPATH", L"javapath", L"", tJavaExePath, MAX_PATH, FPath);if(!lstrlen(tJavaExePath)){return FALSE;}return TRUE;}void JNIOperator::ExeBat(){InitLogName("javaexe");/*TCHAR ppPath[MAX_PATH];ZeroMemory(ppPath,sizeof(ppPath));if (!ReadJavaExePath(ppPath)){Log(L_ERROR,"ReadJavaExePath failer!");return;}*/SHELLEXECUTEINFO ShellInfo;memset(&ShellInfo, 0, sizeof(ShellInfo));ShellInfo.cbSize = sizeof(ShellInfo);ShellInfo.hwnd = NULL;ShellInfo.lpVerb = L"open";ShellInfo.lpFile = L"cmd.exe";//ShellInfo.lpFile = L"F:\\tool\\tool\\java\\start_myhttpd.bat"; // 此处写执行文件的绝对路径 //ShellInfo.lpFile = ppPath; // 此处写执行文件的绝对路径 ShellInfo.lpParameters = L"/K java -jar myhttpd.jar";//参数,多个参数用空格隔开（para1和para2是字符串）；参数也可以是一个LPCWSTR类型的变量，写法：ShellInfo.lpParameters = 变量名；//ShellInfo.lpParameters = L"/C F:\tool\tool\java\start_myhttpd.bat";ShellInfo.nShow = SW_HIDE;ShellInfo.fMask = SEE_MASK_NOCLOSEPROCESS;BOOL bResult = ShellExecuteEx(&ShellInfo);//调用exe程序if(bResult){Log(L_ERROR,"exe sussess!");}else{Log(L_ERROR,"exe failer!");}}void JNIOperator::ExeNode1(){SHELLEXECUTEINFO ShellInfo;memset(&ShellInfo, 0, sizeof(ShellInfo));ShellInfo.cbSize = sizeof(ShellInfo);ShellInfo.hwnd = NULL;ShellInfo.lpVerb = L"open";ShellInfo.lpFile = L"cmd.exe";ShellInfo.lpParameters = L"/K forever start policyServer.js";//参数,多个参数用空格隔开（para1和para2是字符串）；参数也可以是一个LPCWSTR类型的变量，写法：ShellInfo.lpParameters = 变量名；//ShellInfo.lpParameters = L"/C F:\tool\tool\java\start_myhttpd.bat";ShellInfo.nShow = SW_HIDE;ShellInfo.fMask = SEE_MASK_NOCLOSEPROCESS;BOOL bResult = ShellExecuteEx(&ShellInfo);//调用exe程序if(bResult){Log(L_ERROR,"exe sussess!");}else{Log(L_ERROR,"exe failer!");}}void JNIOperator::ExeNode2(){SHELLEXECUTEINFO ShellInfo;memset(&ShellInfo, 0, sizeof(ShellInfo));ShellInfo.cbSize = sizeof(ShellInfo);ShellInfo.hwnd = NULL;ShellInfo.lpVerb = L"open";ShellInfo.lpFile = L"cmd.exe";ShellInfo.lpParameters = L"/K forever start gps.js";//参数,多个参数用空格隔开（para1和para2是字符串）；参数也可以是一个LPCWSTR类型的变量，写法：ShellInfo.lpParameters = 变量名；//ShellInfo.lpParameters = L"/K F:\tool\tool\java\start_myhttpd.bat";ShellInfo.nShow = SW_HIDE;ShellInfo.fMask = SEE_MASK_NOCLOSEPROCESS;BOOL bResult = ShellExecuteEx(&ShellInfo);//调用exe程序if(bResult){Log(L_ERROR,"exe sussess!");}else{Log(L_ERROR,"exe failer!");}}




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