java程序调用dll

项目需求

调用捷宸EIO开发包DLL动态库控制应急门的开关停，现场应急门继电器连接的是6、7、8，分别对应的是开、停、关。0为打开，1为关闭。

java程序开发

在resource中新建lib将dll放入其中

sdk工具开发

package com.lyc.ocr.door;

import com.sun.jna.Library;
import com.sun.jna.Native;
public interface DoorCallSDK extends Library {

    DoorCallSDK INSTANCE = (DoorCallSDK) Native.loadLibrary("IOSDK_x64", DoorCallSDK.class);

    /**
     * 创建设备
     * </p>
     * 以IP 地址为参数，创建一个设备
     *
     * @param strIp ansi 字符串，设备 IP 地址 如"192.168.1
     * @return 0 表示创建设备失败，非 0 成功；表示"设备句柄"
     */
    int Jc_CreateDev(String strIp);

    /**
     * 登录（解锁）设备
     *
     * @param lDev   设备句柄
     * @param strPwd ansi 字符串 表示设备登录（解锁）密
     * @return 成功：0，失败：非零
     */
    int Jc_LoginDev(int lDev, String strPwd);

    /**
     * 删除（释放）设备
     * </p>
     * 释放不再需要使用的设备
     *
     * @param lDev 设备句柄
     */
    void Jc_DelDev(int lDev);

    /**
     * 创建通讯设备（通过串口）
     *
     * @param btAddr     modbus 地址
     * @param btWorkType 工作模式 （0：TcpServer，1：TCPClient，2：UDP）
     * @param btProtocol 协议类型 ( 0:Modbus_rtu , 1:modbus_Tcp
     * @param uLocalPort 本地端口
     * @param pDevIp     设备 ip 地址
     * @param uDevPort   设备通讯端口
     * @return 成功：非零值，失败：0
     */
    int Jc_CreateNetComuDev(byte btAddr, byte btWorkType, byte btProtocol, short uLocalPort, String pDevIp, short uDevPort);

    /**
     * 判断是否已经连接到模块
     *
     * @param hDev 连接句柄（前面两种方式任意一种创建通讯设备）
     * @return 成功：true，失败：false
     */
    boolean Jc_IsDevConnected(int hDev);

    /**
     * 读取 IO 状态
     *
     * @param hDev  设备句柄
     * @param strIo 16 个字节的缓冲区，每一个字节代表一个 io 状态 ‘0’:低 ‘1’:高
     * @return 成功：0，失败：非零
     */
    int Jc_GetIoState(int hDev, byte[] strIo);

    /**
     * 设置 IO 状态
     *
     * @param hDev  设备句柄
     * @param strIo 16 个字节的缓冲区，每一个字节代表一个 io 状态 ‘0’:低 ‘1’:高
     * @return 成功：0，失败：非零
     */
    int Jc_SetIoState(int hDev, byte[] strIo);

    /**
     * 释放连接
     *
     * @param hDev 连接句柄
     */
    void Jc_ReleaseComuDev(int hDev);
}

为保证达成jar包后能顺利读取到所需要的dll，将dll复制至C:\Windows\System32

提供接口供外部使用

/**
  * 设备通讯
  *
  * @return 是否成功
*/
@PostMapping("doorConn")
public boolean doorCommunication(@RequestBody DoorDTO doorDTO) {
    try {
        DoorCallSDK doorCallSDK = DoorCallSDK.INSTANCE;
        // 连接到IO模块
        int mhCon = doorCallSDK.Jc_CreateNetComuDev(doorDTO.getBtAddr(),
                doorDTO.getBtWorkType(),
                doorDTO.getBtProtocol(),
                doorDTO.getLocalPort(),
                doorDTO.getIp(),
                doorDTO.getDevPort()
        );
        if (mhCon == 0) {
            return false;
        }
        log.info("接口【/door/doorConn】什么什么门连接成功");
        // 读取IO状态
        sdk.Jc_GetIoState(mhCon, doorDTO.getMbtIoState());
        // 修改某个IO口的状态
        //            doorDTO.setMbtIoState();
        // 同步到设备中
        sdk.Jc_SetIoState(mhCon, doorDTO.getMbtIoState());
        // 释放连接
        sdk.Jc_ReleaseComuDev(mhCon);
    } catch (Exception e) {
        return false;
    } catch (UnsatisfiedLinkError error) {
        log.error("接口设备什么什么门通信连接失败");
        return false;
    }
    return true;
}

调用测试

后续

捷宸反馈dll调用的文档过时了，重新发了一份IO连接demo过来，实现一个netty客户端达到应急门控制的目的

NettyClient

package com.lyc.ocr.client;

import cn.hutool.core.convert.Convert;
import com.lyc.ocr.client.handler.NettyClientHandlerInitializer;
import io.netty.bootstrap.Bootstrap;
import io.netty.channel.*;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import javax.annotation.PreDestroy;
import java.util.HashSet;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.TimeUnit;

@Slf4j
@Component
public class NettyClient {

    /**
     * 重连频率，单位：秒
     */
    private static final Integer RECONNECT_SECONDS = 20;

    @Autowired
    private NettyClientHandlerInitializer nettyClientHandlerInitializer;

    private static int[] g_McRctable_16 =
            {
                    0x0000, 0xC0C1, 0xC181, 0x0140, 0xC301, 0x03C0, 0x0280, 0xC241,
                    0xC601, 0x06C0, 0x0780, 0xC741, 0x0500, 0xC5C1, 0xC481, 0x0440,
                    0xCC01, 0x0CC0, 0x0D80, 0xCD41, 0x0F00, 0xCFC1, 0xCE81, 0x0E40,
                    0x0A00, 0xCAC1, 0xCB81, 0x0B40, 0xC901, 0x09C0, 0x0880, 0xC841,
                    0xD801, 0x18C0, 0x1980, 0xD941, 0x1B00, 0xDBC1, 0xDA81, 0x1A40,
                    0x1E00, 0xDEC1, 0xDF81, 0x1F40, 0xDD01, 0x1DC0, 0x1C80, 0xDC41,
                    0x1400, 0xD4C1, 0xD581, 0x1540, 0xD701, 0x17C0, 0x1680, 0xD641,
                    0xD201, 0x12C0, 0x1380, 0xD341, 0x1100, 0xD1C1, 0xD081, 0x1040,
                    0xF001, 0x30C0, 0x3180, 0xF141, 0x3300, 0xF3C1, 0xF281, 0x3240,
                    0x3600, 0xF6C1, 0xF781, 0x3740, 0xF501, 0x35C0, 0x3480, 0xF441,
                    0x3C00, 0xFCC1, 0xFD81, 0x3D40, 0xFF01, 0x3FC0, 0x3E80, 0xFE41,
                    0xFA01, 0x3AC0, 0x3B80, 0xFB41, 0x3900, 0xF9C1, 0xF881, 0x3840,
                    0x2800, 0xE8C1, 0xE981, 0x2940, 0xEB01, 0x2BC0, 0x2A80, 0xEA41,
                    0xEE01, 0x2EC0, 0x2F80, 0xEF41, 0x2D00, 0xEDC1, 0xEC81, 0x2C40,
                    0xE401, 0x24C0, 0x2580, 0xE541, 0x2700, 0xE7C1, 0xE681, 0x2640,
                    0x2200, 0xE2C1, 0xE381, 0x2340, 0xE101, 0x21C0, 0x2080, 0xE041,
                    0xA001, 0x60C0, 0x6180, 0xA141, 0x6300, 0xA3C1, 0xA281, 0x6240,
                    0x6600, 0xA6C1, 0xA781, 0x6740, 0xA501, 0x65C0, 0x6480, 0xA441,
                    0x6C00, 0xACC1, 0xAD81, 0x6D40, 0xAF01, 0x6FC0, 0x6E80, 0xAE41,
                    0xAA01, 0x6AC0, 0x6B80, 0xAB41, 0x6900, 0xA9C1, 0xA881, 0x6840,
                    0x7800, 0xB8C1, 0xB981, 0x7940, 0xBB01, 0x7BC0, 0x7A80, 0xBA41,
                    0xBE01, 0x7EC0, 0x7F80, 0xBF41, 0x7D00, 0xBDC1, 0xBC81, 0x7C40,
                    0xB401, 0x74C0, 0x7580, 0xB541, 0x7700, 0xB7C1, 0xB681, 0x7640,
                    0x7200, 0xB2C1, 0xB381, 0x7340, 0xB101, 0x71C0, 0x7080, 0xB041,
                    0x5000, 0x90C1, 0x9181, 0x5140, 0x9301, 0x53C0, 0x5280, 0x9241,
                    0x9601, 0x56C0, 0x5780, 0x9741, 0x5500, 0x95C1, 0x9481, 0x5440,
                    0x9C01, 0x5CC0, 0x5D80, 0x9D41, 0x5F00, 0x9FC1, 0x9E81, 0x5E40,
                    0x5A00, 0x9AC1, 0x9B81, 0x5B40, 0x9901, 0x59C0, 0x5880, 0x9841,
                    0x8801, 0x48C0, 0x4980, 0x8941, 0x4B00, 0x8BC1, 0x8A81, 0x4A40,
                    0x4E00, 0x8EC1, 0x8F81, 0x4F40, 0x8D01, 0x4DC0, 0x4C80, 0x8C41,
                    0x4400, 0x84C1, 0x8581, 0x4540, 0x8701, 0x47C0, 0x4680, 0x8641,
                    0x8201, 0x42C0, 0x4380, 0x8341, 0x4100, 0x81C1, 0x8081, 0x4040
            };

    /**
     * 线程组，用于客户端对服务端的链接、数据读写
     */
    private EventLoopGroup eventGroup = new NioEventLoopGroup();

    /**
     * 用于保存channel通道
     */
    private static final Map<String, Channel> CHANNEL_MAP = new ConcurrentHashMap<>();

    /**
     * 保存用户需要重连的地址信息
     */
    private static final Set<String> CONNECT_LIST = new HashSet<>();

    public void reconnect() {
        eventGroup.schedule(() -> {
            log.info("[reconnect][开始重连]");

            CONNECT_LIST.forEach((a) -> {
                try {
                    String[] s = a.split(":");
                    start(s[0], Convert.toInt(s[1]), new byte[]{});
                } catch (InterruptedException e) {
                    log.error("[reconnect][重连失败]", e);
                }
            });

        }, RECONNECT_SECONDS, TimeUnit.SECONDS);
        log.info("[reconnect][{} 秒后将发起重连]", RECONNECT_SECONDS);
    }

    /**
     * 启动 Netty Client
     */
    public void start(String host, Integer port, byte[] content) throws InterruptedException {
        if (CHANNEL_MAP.containsKey(host + ":" + port) && CHANNEL_MAP.get(host + ":" + port) != null) {
            return;
        }
        // 创建 Bootstrap 对象，用于 Netty Client 启动
        Bootstrap bootstrap = new Bootstrap();
        // 设置 Bootstrap 的各种属性。
        bootstrap.group(eventGroup) // 设置一个 EventLoopGroup 对象
                .channel(NioSocketChannel.class)  // 指定 Channel 为客户端 NioSocketChannel
                .remoteAddress(host, port) // 指定链接服务器的地址
                .option(ChannelOption.SO_KEEPALIVE, true) // TCP Keepalive 机制，实现 TCP 层级的心跳保活功能
                .option(ChannelOption.TCP_NODELAY, true) // 允许较小的数据包的发送，降低延迟
                .handler(nettyClientHandlerInitializer);
        // 链接服务器，并异步等待成功，即启动客户端
        bootstrap.connect().addListener(new ChannelFutureListener() {

            @Override
            public void operationComplete(ChannelFuture future) throws Exception {
                // 连接失败
                if (!future.isSuccess()) {
                    log.error("[start][Netty Client 连接服务器({}:{}) 失败]", host, port);
                    reconnect();
                    return;
                }
                // 连接成功
                CHANNEL_MAP.put(host + ":" + port, future.channel());
                CONNECT_LIST.add(host + ":" + port);
//                channel = future.channel();
                log.info("[start][Netty Client 连接服务器({}:{}) 成功]", host, port);
                if (content.length > 0) {
                    future.channel().writeAndFlush(content);
                }
            }

        });
    }

    /**
     * 关闭 Netty Server
     */
    @PreDestroy
    public void shutdown() {
        // 关闭 Netty Client
        CHANNEL_MAP.forEach((k, v) -> {
            if (v != null) {
                v.close();
            }
        });
        // 优雅关闭一个 EventLoopGroup 对象
        eventGroup.shutdownGracefully();
    }

    /**
     * 发送消息
     *
     * @param content 消息体
     */
    public void send(String host, Integer port, byte[] content) {
        Channel channel = Optional.of(CHANNEL_MAP).map(a -> a.get(host + ":" + port)).orElse(null);
        if (channel == null) {
            log.error("[send][连接不存在]");
            return;
        }
        if (!channel.isActive()) {
            log.error("[send][连接({})未激活]", channel.id());
            return;
        }
        // 发送消息
        channel.writeAndFlush(content);
    }

    public void remove(ChannelId channelId) {
        CHANNEL_MAP.forEach((k, v) -> {
            if (channelId.equals(v.id())) {
                CHANNEL_MAP.remove(k);
            }
        });
    }

    public int CRC_GetModbus16(byte[] pData, int nLength) {
        int cRc_16 = 0xFFFF;
        byte temp;

        for (int i = 0; i < nLength; ++i) {
            temp = (byte) (cRc_16 & 0xFF);
            cRc_16 = (int) ((cRc_16 >> 8) ^ g_McRctable_16[(temp ^ pData[i]) & 0xFF]);
        }


        return cRc_16;
    }

}

NettyClientHandler

package com.lyc.ocr.client.handler;

import com.lyc.ocr.client.NettyClient;
import io.netty.channel.ChannelFutureListener;
import io.netty.channel.ChannelHandler;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInboundHandlerAdapter;
import io.netty.handler.timeout.IdleStateEvent;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Slf4j
@Component
@ChannelHandler.Sharable
public class NettyClientHandler extends ChannelInboundHandlerAdapter {

    @Autowired
    private NettyClient nettyClient;

    @Override
    public void channelInactive(ChannelHandlerContext ctx) throws Exception {
        // 发起重连
        nettyClient.reconnect();
        // 继续触发事件
        super.channelInactive(ctx);
    }

    @Override
    public void exceptionCaught(ChannelHandlerContext ctx, Throwable cause) {
        log.error("[exceptionCaught][连接({}) 发生异常]", ctx.channel().id(), cause);
        // 断开连接
        nettyClient.remove(ctx.channel().id());
        ctx.channel().close();
    }

    @Override
    public void userEventTriggered(ChannelHandlerContext ctx, Object event) throws Exception {
        // 空闲时，向服务端发起一次心跳，通过指定命令获取当前服务端应急门状态，使服务端发送应急们状态给当前客户端
        if (event instanceof IdleStateEvent) {
            byte[] sendData = new byte[8];
            sendData[0] = 0x01; //地址码，根据设备地址填写
            sendData[1] = 0x03; //功能码，表示读取
            sendData[2] = 0x00; //起始地址高位
            sendData[3] = 0x01; //起始地址低位
            sendData[4] = 0x00; //要读取的寄存器数量的高位
            sendData[5] = 0x01; //要读取的寄存器数量的低位


            int uCrc = nettyClient.CRC_GetModbus16(sendData, 6);

            sendData[6] = (byte) (uCrc); //crc16校验高位
            sendData[7] = (byte) (uCrc >> 8); //crc16校验低位
            ctx.writeAndFlush(sendData)
                    .addListener(ChannelFutureListener.CLOSE_ON_FAILURE);
        } else {
            super.userEventTriggered(ctx, event);
        }
    }

    @Override
    public void channelRead(ChannelHandlerContext ctx, Object msg) throws Exception {
        // 读取服务端信息，防止连接服务端出现ReadTimeOutException
        log.info("Client,接收到服务端发来的消息:" + msg);
    }
}

NettyClientHandlerInitializer

package com.lyc.ocr.client.handler;

import com.lyc.ocr.client.codec.InvocationEncoder;
import io.netty.channel.Channel;
import io.netty.channel.ChannelInitializer;
import io.netty.handler.timeout.IdleStateHandler;
import io.netty.handler.timeout.ReadTimeoutHandler;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

@Component
public class NettyClientHandlerInitializer extends ChannelInitializer<Channel> {

    /**
     * 心跳超时时间
     */
    private static final Integer READ_TIMEOUT_SECONDS = 60;

    @Autowired
    private NettyClientHandler nettyClientHandler;

    @Override
    protected void initChannel(Channel ch) {
        ch.pipeline()
                // 空闲检测
                .addLast(new IdleStateHandler(READ_TIMEOUT_SECONDS, 0, 0))
                .addLast(new ReadTimeoutHandler(3 * READ_TIMEOUT_SECONDS))
                // 编码器
                .addLast(new InvocationEncoder())
                // 客户端处理器
                .addLast(nettyClientHandler)
        ;
    }

}

InvocationEncoder

package com.lyc.ocr.client.codec;

import io.netty.buffer.ByteBuf;
import io.netty.channel.ChannelHandlerContext;
import io.netty.handler.codec.MessageToByteEncoder;

public class InvocationEncoder extends MessageToByteEncoder<byte[]> {
    @Override
    protected void encode(ChannelHandlerContext ctx, byte[] content, ByteBuf out) {
        // 写入内容
        out.writeBytes(content);
    }
}

上面的controller修改

package com.lyc.ocr.controller;

import com.lyc.ocr.client.NettyClient;
import com.lyc.ocr.door.DoorDTO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.util.StringUtils;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import javax.annotation.Resource;

@Slf4j
@RequestMapping("/door")
@RestController
public class DoorController {

    @Resource
    private NettyClient nettyClient;

    /**
     * 设备通讯
     *
     * @return 是否成功
     */
    @PostMapping("doorConn")
    public boolean doorCommunication(@RequestBody DoorDTO doorDTO) {
        // 发送指令
        String strSet;
        strSet = doorDTO.getMbtIoState().replace(" ", "");

        //置高寄存器值
        int uSetH = 0;
        //置低寄存器值
        int uSetL = 0;

        for (int i = 0; i < 16; i++) {
            String[] ss = strSet.split("");
            if ("1".equals(ss[i])) {
                //把置高寄存器相应的位置成1
                uSetH |= 1 << i;
                //把置低寄存器相应的位置成0
                uSetL &= ~(1 << i);
            } else if ("0".equals(ss[i])) {
                //把置高寄存器相应的位置成0
                uSetH &= ~(1 << i);
                //把置低寄存器相应的位置成1
                uSetL |= 1 << i;
            }
        }

        byte[] sendData = new byte[13];
        sendData[0] = 0x01; //地址码，根据设备地址填写
        sendData[1] = 0x10; //功能码，表示要写多个寄存器
        sendData[2] = 0x00; //起始地址高位
        sendData[3] = 0x02; //起始地址低位
        sendData[4] = 0x00; //寄存器数量高位
        sendData[5] = 0x02; //寄存器数量低位
        sendData[6] = 0x04; //要写的字节数
        sendData[7] = (byte) (uSetH >> 8); //
        sendData[8] = (byte) (uSetH); //
        sendData[9] = (byte) (uSetL >> 8); //
        sendData[10] = (byte) (uSetL); //

        int uCrc = nettyClient.CRC_GetModbus16(sendData, 11);

        //crc16校验低位
        sendData[11] = (byte) (uCrc);
        //crc16校验高位
        sendData[12] = (byte) (uCrc >> 8);
        try {
            // 如果传了指定ip和端口则重置netty链接
            if (StringUtils.hasText(doorDTO.getIp()) && doorDTO.getDevPort() != null) {
                nettyClient.start(doorDTO.getIp(), doorDTO.getDevPort(), sendData);
            }
            nettyClient.send(doorDTO.getIp(), doorDTO.getDevPort(), sendData);
        } catch (Exception e) {
            return false;
        }
        return true;
    }
}