C语言中char转jstring类型

#include<jni.h>
#include<stdio.h>
#include"BTest.h"
#include<cstring>

/*
 *Class:     BTest
 *Method:    hello
 *Signature: ()V
 */
JNIEXPORT jstring JNICALL Java_BTest_hello
  (JNIEnv* env, jobject){

  const char *pat = "hello";

  jclass strClass = (env)->FindClass("java/lang/String");
    jmethodID ctorID = (env)->GetMethodID(strClass, "<init>", "([BLjava/lang/String;)V");
    jbyteArray bytes = (env)->NewByteArray(strlen(pat));
    (env)->SetByteArrayRegion(bytes, 0, strlen(pat), (jbyte *) pat);
    jstring encoding = (env)->NewStringUTF("utf-8");
    return (jstring) (env)->NewObject(strClass, ctorID, bytes, encoding);

}

转成jstring类型return，java端调用的时候可以用String类型接收参数