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#include "codec.h"
#include <sys/types.h>
#include <string.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
//获得字符长度
jint getStrLen(JNIEnv* env, jstring str)
{
jint len = (*env)->GetStringLength(env,str);
return len;
}
//java字符串转C字符串
char* js2c(JNIEnv* env, jstring jstr) {
char* pstr = NULL;
jclass jstrObj = (*env)->FindClass(env, "java/lang/String");
jstring encode = (*env)->NewStringUTF(env, "utf-8");
jmethodID methodId = (*env)->GetMethodID(env, jstrObj, "getBytes","(Ljava/lang/String;)[B");
jbyteArray byteArray = (jbyteArray)(*env)->CallObjectMethod(env, jstr,methodId, encode);
jsize strLen = (*env)->GetArrayLength(env, byteArray);
jbyte *jBuf = (*env)->GetByteArrayElements(env, byteArray, JNI_FALSE);
if (jBuf > 0) {
pstr = (char*) malloc(strLen + 1);
if (!pstr) {
return NULL;
}
memcpy(pstr, jBuf, strLen);
pstr[strLen] = 0;
}
(*env)->ReleaseByteArrayElements(env, byteArray, jBuf, 0);
return pstr;
}
//C字符串转java字符串
jstring c2js(JNIEnv* env, const char* pstr) {
int strLen = strlen(pstr);
jclass jstrObj = (*env)->FindClass(env, "java/lang/String");
jmethodID methodId = (*env)->GetMethodID(env, jstrObj, "<init>","([BLjava/lang/String;)V");
jbyteArray byteArray = (*env)->NewByteArray(env, strLen);
jstring encode = (*env)->NewStringUTF(env, "utf-8");
(*env)->SetByteArrayRegion(env, byteArray, 0, strLen, (jbyte*) pstr);
return (jstring)(*env)->NewObject(env, jstrObj, methodId, byteArray, encode);
}
#ifndef _CODEC_H_
#define _CODEC_H_
#ifdef __cplusplus
extern "C" {
#endif
#include <jni.h>
//获取字符串长度
jint getStrLen(JNIEnv* env, jstring str)
//java字符串转C字符串
char* js2c(JNIEnv* env, jstring jstr);
//C字符串转java字符串
jstring c2js(JNIEnv* env, const char* pstr);
#ifdef __cplusplus
}
#endif
#endif