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网上搜到的都是jint转int啊，jstring转string啊，因为自己有用到就记录一下
互转还是很简单的只要用到stdlib.h的atoi函数和stdio.h的sprintf函数
先字符串转int，long，double
int number1 = atoi("123456");
long number2 = atol("948574773");
double number3 = atof("984345.434");
LOGD("=====================number1 = %d",number1);
LOGD("=====================number2 = %ld",number2);
LOGD("=====================number3 = %f",number3);输出结果
再来int，long，double转字符串
int number1 = 123456;
long number2 = 12345663423;
double number3 = 773643.54334;
char *string1 = (char *) malloc(sizeof(char) * 16);
char *string2 = (char *) malloc(sizeof(char) * 16);
char *string3 = (char *) malloc(sizeof(char) * 16);
sprintf(string1,"%d",number1);
sprintf(string2,"%ld",number2);
sprintf(string3,"%f",number3);
LOGD("=====================string1 = %s",string1);
LOGD("=====================string2 = %s",string2);
LOGD("=====================string3 = %s",string3);输出结果
