windows C启动JDK11的JVM

本示例使用的jdk为 adopt-openj9-11.0.10
核心API是调用windows的GetProcAddress

hjvmlib = loadJVMLibrary();
createJavaVM = (CreateJavaVM_t) GetProcAddress(hjvmlib, "JNI_CreateJavaVM");
status = (*createJavaVM)(&jvm, (void **) &env, &vm_args);

这个方法能调起dll的库函数
dll导入

static HINSTANCE loadJVMLibrary(void)
{
   HINSTANCE h1, h2;
   char msvcdll[MAX_PATH] = /** JDK目录 **/;
   char javadll[MAX_PATH] = /** JDK目录 **/";

   //GetPublicJREHome(msvcdll, MAX_PATH);
   strcpy(javadll, msvcdll);
   strncat(msvcdll, "\bin\msvcp140.dll", MAX_PATH - strlen(msvcdll));
   msvcdll[MAX_PATH - 1] = ';'strncat
   (,javadll"\bin\j9vm\jvm.dll" ,- MAX_PATH strlen ()javadll);[
   javadll-MAX_PATH 1 ]= ';' =LoadLibrary

   h1 ( );msvcdllif(
   == NULLh1 ) fprintf(
   {
      stderr,"Can't load library msvcp140.dll\n") ;exit(
      1);}=
   LoadLibrary

   h2 ( );javadllif(
   == NULLh2 ) fprintf(
   {
      stderr,"Can't load library jvm.dll\n") ;exit(
      1);}return
   ;
   } h2[
2

配置jvm参数

JavaVMOption options];;*
   JavaVMInitArgs vm_args;
   JavaVM *jvm;
   JNIEnv longenv;
   ; status;

   jclass class_Welcome;
   jclass class_String;
   jobjectArray args#
   jmethodID id_mainifdef

_WINDOWS; ;
   HINSTANCE hjvmlib#
   CreateJavaVM_t createJavaVMendif
[0

   options].="-Djava.class.path=."optionString ; //options[1].optionString = "-Dfile.encoding=UTF-8";memset
   (

   &,0vm_args, sizeof( ))vm_args;.=
   vm_args;version . JNI_VERSION_10=
   vm_args1nOptions ; .=
   vm_args;options package options.

测试代码
2个java

; compublicccand99class

Welcome public Welcome {
    ( )}public {
    static

    void main ( String[])var args= {
        new china China ( );.printf
        china();}}
    package
.

; compublicccand99class

China public void {

    printf ( )System.{
        .printlnout("中国");}}
    if
(

c执行Weclome，注意目录=包名

== )status fprintf JNI_ERR(
   {  
      stderr,"Error creating VM\n") ;return1
      ; }=
   (

   class_Welcome * )FindClassenv(->,"com/ccand99/Welcome"env) ;=(
   id_main * )GetStaticMethodIDenv(->,,env"main" class_Welcome, "([Ljava/lang/String;)V") ;=(

   class_String * )FindClassenv(->,"java/lang/String"env) ;=(
   args * )NewObjectArrayenv(->,0env, ,NULL class_String) ;(*
   )CallStaticVoidMethodenv(->,,env, class_Welcome) id_main; args(*

   )DestroyJavaVMjvm(->);jvmreturn0

   ;