2021-03-11

#include "com_git_MathInterface.h"

using namespace std;
JNIEXPORT jint JNICALL Java_com_git_MathInterface_add
(JNIEnv * jni, jclass clazz, jint a, jint b){
    return a+b;
}


JNIEXPORT jobject JNICALL Java_com_git_MathInterface_addInteger
(JNIEnv * jni, jobject obj, jobject a, jobject b){

    jclass class_Test =jni->GetObjectClass(a);    //注释（1）
    jfieldID id_age = (jni)->GetFieldID(class_Test, "value", "I");
    jint ac = jni->GetIntField(a,id_age);
    jfieldID bId = (jni)->GetFieldID(class_Test, "value", "I");
    jint bc = jni->GetIntField(b,bId);
    jint result = ac+bc;
    jmethodID valueOf = jni->GetStaticMethodID(class_Test,"valueOf","(I)Ljava/lang/Integer;");
    jobject c = jni->CallStaticObjectMethod(class_Test,valueOf,result);
    return c;
}


JNIEXPORT jobject JNICALL Java_com_git_MathInterface_getOrder
  (JNIEnv * jni, jobject object, jobject orderNo){
    jclass longClass =jni->GetObjectClass(orderNo);

    jclass orederClass =jni->FindClass("Lcom/git/Order;");


    //jmethodID valueOf = jni->GetStaticMethodID(longClass,"valueOf","(J)Ljava/lang/Long;");
    //jobject orderNo = jni->CallStaticObjectMethod(longClass,valueOf,orderNo);

    jmethodID newOrder = jni->GetMethodID(orederClass,"<init>","()V");
    jobject order = jni->NewObjectA(orederClass, newOrder,0);
    jmethodID setOrderNo = jni->GetMethodID(orederClass,"setOrderNo","(Ljava/lang/Long;)V");
    jni->CallObjectMethod(order,setOrderNo,orderNo);
    jstring orderName = jni->NewStringUTF("订单008");
    jmethodID setName = jni->GetMethodID(orederClass,"setName","(Ljava/lang/String;)V");
    jni->CallObjectMethod(order,setName,orderName);

    return order;
}


JNIEXPORT jobject JNICALL Java_com_git_MathInterface_checkOrder
(JNIEnv * jni, jobject object, jobject order){

    return nullptr;
}

/* DO NOT EDIT THIS FILE - it is machine generated */
#include <jni.h>
#include <iostream>
/* Header for class com_git_MathInterface */

#ifndef _Included_com_git_MathInterface
#define _Included_com_git_MathInterface
#ifdef __cplusplus
extern "C" {
#endif
/*
 * Class:     com_git_MathInterface
 * Method:    add
 * Signature: (II)I
 */
JNIEXPORT jint JNICALL Java_com_git_MathInterface_add
  (JNIEnv *, jclass, jint a, jint b);

/*
 * Class:     com_git_MathInterface
 * Method:    addInteger
 * Signature: (Ljava/lang/Integer;Ljava/lang/Integer;)Ljava/lang/Integer;
 */
JNIEXPORT jobject JNICALL Java_com_git_MathInterface_addInteger
  (JNIEnv *, jobject, jobject a, jobject b);

/*
 * Class:     com_git_MathInterface
 * Method:    getOrder
 * Signature: (Ljava/lang/Long;)Lcom/git/Order;
 */
JNIEXPORT jobject JNICALL Java_com_git_MathInterface_getOrder
(JNIEnv * jni, jobject object, jobject orderNo);

/*
 * Class:     com_git_MathInterface
 * Method:    checkOrder
 * Signature: (Lcom/git/Order;)Ljava/lang/Boolean;
 */
JNIEXPORT jobject JNICALL Java_com_git_MathInterface_checkOrder
  (JNIEnv * jni, jobject object, jobject order);

#ifdef __cplusplus
}
#endif
#endif

CONFIG -= qt

TEMPLATE = lib
DEFINES += JNI_TEST_SO_LIBRARY

CONFIG += c++11
CONFIG += dll

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES += QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES += \
    com_git_MathInterface.cpp

HEADERS += \
    com_git_MathInterface.h \
    jawt_md.h \
    jni.h \
    jni_md.h

# Default rules for deployment.
unix {
    target.path = /usr/lib
}
!isEmpty(target.path): INSTALLS += target

public class MathInterface {

    public native static int add(int i,int j);

    public native Integer addInteger(Integer i,Integer j);

    public native Order getOrder(Long orderNo);

    public native Boolean checkOrder(Order order);
}

/**
 * @author authorZhao
 * @since 2021-03-10
 */
@Data
public class Order {

    private Long orderNo;

    private String name;
}

public class Main {
    static {
        System.loadLibrary("jni_test_so");
    }

    public static void main(String[] args) {
        /*String jni_test_so = MathInterface.class.getClassLoader().getResource("jni_test_so").getPath();
        System.out.println("jni_test_so = " + jni_test_so);*/

        MathInterface mathInterface = new MathInterface();
        int result = MathInterface.add(8, 9);
        Integer integer = mathInterface.addInteger(20, 18);


        Order order = mathInterface.getOrder(18L);
        System.out.println("order = " + order);
        System.out.println("result = " + result);
        System.out.println("integer = " + integer);
    }
}

\jdk1.8\jre\bin

标签：11,03,git,jobject,MathInterface,2021,jni,com,order
来源： https://blog.csdn.net/weixin_43328357/article/details/114679131