c++调用java笔记

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JVM

bool 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();
}