c++调用java笔记

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头文件

#ifndef OBJECT_H#define OBJECT_H#include "jni.h"class Object{public:    Object();    static bool BeginJVM();    static bool EndJVM();protected:    static JNIEnv* env;    static JavaVM* jvm;};#endif // OBJECT_H

源文件：

#include "object.h"//#include "JavaClasses.h"#include "Object.h"#include"QDebug"#include"iostream"#include"stdio.h"using namespace std;Object::Object(){}JNIEnv* Object::env=new JNIEnv;JavaVM* Object::jvm=new JavaVM;//创建JVMbool Object::BeginJVM(){    JavaVMOption options[3];    JavaVMInitArgs vm_args;    //各种参数    options[0].optionString = "-Djava.compiler=NONE";    options[1].optionString = "-Djava.class.path=.";    options[2].optionString = "-verbose:jni";//用于跟踪运行时地信息//    options[3].optionString = "-Djava.library.path=C:/Program Files/Java/jre7/bin/client";    vm_args.version=JNI_VERSION_1_1;    vm_args.options=options;    vm_args.nOptions=3;    vm_args.ignoreUnrecognized = JNI_TRUE;    qDebug("dddddd");    //创建JVM，获得jvm和env    cout<<&jvm<<"  "<<(void **)&env<<"  "<<&vm_args;    int res = JNI_CreateJavaVM(&jvm,(void **)&env, &vm_args);    qDebug(res+"");    return true;}bool Object::EndJVM(){    //关闭JVM    jvm->DestroyJavaVM();    return true;}

main文件：

#include <QCoreApplication>#include"object.h"#include"QDebug"int main(int argc, char *argv[]){    QCoreApplication a(argc, argv);    Object obj;    if(obj.BeginJVM())        qDebug("true");        return a.exec();}

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