概述：前段时间对读卡器进行开发，目的是开发一个工具类接口给其他同事用在项目上调用读卡器，于是呼写了一个Java调用读卡器，进行读卡，写卡的操作例子。由于使用的是厂商提供的dll库，所以选择了JNA进行开发。当然还有一种JNI方式，这种方式适合开发底层，比如封装SDK。业务开发建议使用JNA，方便使用。JNI开发比较繁琐，需要Java类，包对应C的类，包名称，以及编译等注意事项。
1、首先在pom里引入：JNA三方库
com.sun.jna jna3.0.9
2、接口类封装：用于存放dll库中可以调用的接口。
import com.sun.jna.Library;
public interface RWOptionService extends Library {
int YW_GetReaderID(int ReaderID);
int YW_USBHIDInitial();
int YW_USBHIDFree();
int YW_Buzzer(int ReaderID, int Time_ON, int Time_OFF, int Cycle);
int YW_Led(int ReaderID, int LEDIndex, int Time_ON, int Time_OFF, int Cycle, int LedIndexOn);
int YW_AntennaStatus(int ReaderID, boolean Status);
int YW_SearchCardMode(int ReaderID, int Mode);
int YW_RequestCard(int ReaderID, int RequestMode, short CardType[]);
int YW_AntiCollide(int ReaderID, byte LenSNO[], byte SNO[]);
int YW_CardSelect(int ReaderID, byte LenSNO, byte SNO[]);
int YW_DownLoadKey(int ReaderID, int KeyIndex, byte Key[]);
int YW_KeyDown_Authorization(int ReaderID, int KeyMode, int BlockAddr, byte KeyIndex);
int YW_KeyAuthorization(int ReaderID, int KeyMode, int BlockAddr, byte[] Key);
int YW_ReadaBlock(int ReaderID, int BlockAddr, int LenData, byte pData[]);
int YW_WriteaBlock(int ReaderID, int BlockAddr, int LenData, byte pData[]);
int YW_Purse_Initial(int ReaderID, int BlockAddr, int IniMoney);
int YW_Purse_Read(int ReaderID, int BlockAddr, int Money[]);
int YW_Purse_Decrease(int ReaderID, int BlockAddr, int Decrement);
int YW_Purse_Charge(int ReaderID, int BlockAddr, int Charge);
int YW_CardHalt(int ReaderID);
int YW_Restore(int ReaderID, int BlockAddr);
int YW_Transfer(int ReaderID, int BlockAddr);
int YW_AntiCollideAndSelect(int ReaderID, byte ReturnMode, byte CardMem[], byte SNLen[], byte SN[]);
}
3、读写实现，dll库文件看你自己放在什么位置了，我放在了项目根目录下lib里了，这个需要根据你自己的现实的情况而定。
import com.sun.jna.Native;
import java.text.DateFormat;
import java.text.SimpleDateFormat;
import java.time.LocalTime;
import java.time.format.DateTimeFormatter;
import java.util.Calendar;
import java.util.Date;
import java.util.HashMap;
import java.util.Map;
public class RWUtils {
public static RWOptionService INSTANCE;//动态库声明
static {
String bits = System.getProperty("sun.arch.data.model");// 获取jdk位数
System.out.println("jdk 位数：" + bits);
String ops = System.getProperty("os.name"); // 获取os名称
System.out.println("操作系统：" + ops);
if (ops.startsWith("win") || ops.startsWith("Win"))//windows
{
if ("32".equals(bits)) {
System.out.println("当前程序加载了 YW60X-32.dll");
System.load(System.getProperty("user.dir") + "\lib\YW60X-32.dll");
INSTANCE = (RWOptionService) Native.loadLibrary("YW60X-32", RWOptionService.class);
} else {
System.out.println("当前程序加载了 YW60X-64.dll");
System.load(System.getProperty("user.dir") + "\lib\YW60X-64.dll");
INSTANCE = (RWOptionService) Native.loadLibrary("YW60X-64", RWOptionService.class);
}
} else {//其他操作系统
System.out.println("当前仅支持Windows系统，暂不支持其他操作系统！");
}
}
public static boolean write(int readerID, int requestmode, short[] cardtype, byte[] lenSn, byte[] cardNo, byte[] key, byte[] blockData, int blockAddr, boolean buzzerAndLed) {
INSTANCE.YW_USBHIDInitial();
int rt = 0;
rt = INSTANCE.YW_RequestCard(readerID, requestmode, cardtype);
rt = INSTANCE.YW_AntiCollide(readerID, lenSn, cardNo);
rt = INSTANCE.YW_CardSelect(readerID, lenSn[0], cardNo);
rt = INSTANCE.YW_KeyAuthorization(readerID, 96, blockAddr, key);
System.out.println();
rt = INSTANCE.YW_WriteaBlock(readerID, blockAddr, 16, blockData);
if (buzzerAndLed) {
INSTANCE.YW_Led(readerID, 1, 1, 1, 3, 2);
INSTANCE.YW_Buzzer(readerID, 1, 1, 2);
}
INSTANCE.YW_USBHIDFree();
if (rt > 0) {
//写卡完成
System.out.println("写入成功，写入的数据为：" + byteArrayToInt(blockData, 0, true));
return true;
}
//写卡失败
return false;
}
public static Map reader(int readerID, int requestmode, short[] cardtype, byte[] lenSn, byte[] cardNo, byte[] key, byte[] blockData, int blockAddr, boolean buzzerAndLed) {
Map resultMap = new HashMap<>();
INSTANCE.YW_USBHIDInitial();
int rt = 0;
rt = INSTANCE.YW_RequestCard(readerID, requestmode, cardtype);
rt = INSTANCE.YW_AntiCollide(readerID, lenSn, cardNo);
resultMap.put("cardNo", byteArrayToInt(cardNo, 0, true));
rt = INSTANCE.YW_CardSelect(readerID, lenSn[0], cardNo);
rt = INSTANCE.YW_KeyAuthorization(readerID, 96, blockAddr, key);
rt = INSTANCE.YW_ReadaBlock(readerID, blockAddr, 16, blockData);
System.out.println();
if (rt > 0) {
resultMap.put("data", byteArrayToInt(blockData, 0, true));
}
if (rt > 0 && buzzerAndLed) {
INSTANCE.YW_Led(readerID, 1, 1, 1, 3, 2);
INSTANCE.YW_Buzzer(readerID, 2, 2, 1);
}
INSTANCE.YW_USBHIDFree();
return resultMap;
}
public static void main(String args[]) {
Calendar instance = Calendar.getInstance();
DateFormat dateFormat = new SimpleDateFormat("yyyyMMdd");
System.out.println(dateFormat.format(instance.getTime()));
}
public static int getTimeAdd(){
LocalTime now = LocalTime.now();
DateTimeFormatter dtf = DateTimeFormatter.ofPattern("HHmm");
String timeStr = now.format(dtf);
if(!timeStr.isEmpty()){
String times[]= timeStr.split(":");
return Integer.parseInt(times[0])+Integer.parseInt(times[1]);
}
return -1;
}
public static byte[] intToByteArray(int i, boolean isBig) {
byte[] result = new byte[4];
// 由高位到低位
if (isBig) {
result[0] = (byte) ((i >> 24) & 0xFF);
result[1] = (byte) ((i >> 16) & 0xFF);
result[2] = (byte) ((i >> 8) & 0xFF);
result[3] = (byte) (i & 0xFF);
} else {
result[3] = (byte) ((i >> 24) & 0xFF);
result[2] = (byte) ((i >> 16) & 0xFF);
result[1] = (byte) ((i >> 8) & 0xFF);
result[0] = (byte) (i & 0xFF);
}
return result;
}
public static int byteArrayToInt(byte[] bytes, int start, boolean isBig) {
int value = 0;
if (isBig) {
value += (bytes[start] & 0x000000FF) << 24;
value += (bytes[start + 1] & 0x000000FF) << 16;
value += (bytes[start + 2] & 0x000000FF) << 8;
value += (bytes[start + 3] & 0x000000FF);
} else {
value += (bytes[start] & 0x000000FF);
value += (bytes[start + 1] & 0x000000FF) << 8;
value += (bytes[start + 2] & 0x000000FF) << 16;
value += (bytes[start + 3] & 0x000000FF) << 24;
}
return value;
}
}
