add jni api

Author: sparrowzoo

Diff for: sparrow-jni/.gitignore

@@ -0,0 +1,9 @@
+*.iml
+target
+.idea
+lib
+classes
+logs
+*.jar
+cmake-build-debug
+lib

Diff for: sparrow-jni/CMakeLists.txt

@@ -0,0 +1,9 @@
+cmake_minimum_required(VERSION 3.13)
+set(CMAKE_C_STANDARD 99)
+project(HelloWorld)
+set(CMAKE_C_STANDARD 99)
+find_package(JNI REQUIRED)
+include_directories(${JNI_INCLUDE_DIRS})
+include_directories(jni)
+add_library(SparrowJni SHARED  src/HelloWorld.c)
+

Diff for: sparrow-jni/jni/com_sparrow_jdk_jni_HelloWorld.h

@@ -0,0 +1,14 @@
+#include <jni.h>
+
+#ifndef _Included_com_sparrow_jdk_jni_HelloWorld
+#define _Included_com_sparrow_jdk_jni_HelloWorld
+#ifdef __cplusplus
+extern "C" {
+#endif
+JNIEXPORT jstring JNICALL Java_com_sparrow_jdk_jni_HelloWorld_hi
+        (JNIEnv *, jclass, jstring);
+
+#ifdef __cplusplus
+}
+#endif
+#endif

Diff for: sparrow-jni/lib/libSparrowJni.dylib

@@ -0,0 +1,26 @@
+// HelloWorld.c
+#include "com_sparrow_jdk_jni_HelloWorld.h"
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+JNIEXPORT jstring JNICALL Java_com_sparrow_jdk_jni_HelloWorld_hi(
+        JNIEnv *env, jclass cls, jstring j_str)
+{
+    const char *c_str = NULL;
+    c_str = (*env)->GetStringUTFChars(env, j_str, NULL);
+    printf( " c  recv  :[%s]\n" , c_str);
+
+    if (c_str == NULL)
+    {
+        printf("error.\n");
+        return NULL;
+    }
+    (*env)->ReleaseStringUTFChars(env, j_str, c_str);
+    return j_str;
+}
+
+#ifdef __cplusplus
+}
+#endif