我正在使用 IntelliJ 运行示例 java-jnetpcap 应用程序。我的类路径中有 64 位 JDK,并包含以下依赖项
<dependency>
<groupId>jnetpcap</groupId>
<artifactId>jnetpcap</artifactId>
<version>1.4.r1425-1f</version>
</dependency>
我正在运行下面的 example.java 类
public class PcapReaderDemo
{
private static final String filePath= "/src/main/resources/TAPcapture.pcap";
public static void main(String [] arguments){
final StringBuilder errbuf = new StringBuilder();
Pcap pcap = Pcap.openOffline(filePath,errbuf);
if (pcap == null) {
System.err.printf("Error while opening device for capture: "
+ errbuf.toString());
return;
}
PcapPacketHandler<String> jpacketHandler = new PcapPacketHandler<String>() {
public void nextPacket(PcapPacket packet, String user) {
System.out.printf("Received at %s caplen=%-4d len=%-4d %s\n",
new Date(packet.getCaptureHeader().timestampInMillis()),
packet.getCaptureHeader().caplen(), // Length actually captured
packet.getCaptureHeader().wirelen(), // Original length
user // User supplied object
);
}
};
System.out.println("Cleared");
}
}
它抛出以下异常:
PcapReaderDemo
Exception in thread "main" java.lang.UnsatisfiedLinkError: com.slytechs.library.NativeLibrary.dlopen(Ljava/lang/String;)J
at com.slytechs.library.NativeLibrary.dlopen(Native Method)
at com.slytechs.library.NativeLibrary.<init>(Unknown Source)
at com.slytechs.library.JNILibrary.<init>(Unknown Source)
at com.slytechs.library.JNILibrary.loadLibrary(Unknown Source)
at com.slytechs.library.JNILibrary.register(Unknown Source)
at com.slytechs.library.JNILibrary.register(Unknown Source)
at com.slytechs.library.JNILibrary.register(Unknown Source)
at org.jnetpcap.Pcap.<clinit>(Unknown Source)
at com.demo.myapexapp.PcapReaderDemo.main(PcapReaderDemo.java:20)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:498)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144)
请就问题所在提出建议。
我这样解决了同样的问题:
使用Ubuntu 16.04
-
手动安装jre-1.8.0_181:
- 下载特定的java版本(https://www.oracle.com/technetwork/java/javase/downloads/java-archive-javase8-2177648.html) jre-8u181-linux-x64.tar.gz
- 创建java目录:mkdir /opt/jre
- 提取java:tar -zxf jre-8u181-linux-x64.tar.gz
- 更新使用的java版本:更新替代方案 --install /usr/bin/java java /opt/jre/jre1.8.0_181/bin/java 100
-
下载、解压 jnetpcap 文件并将其复制到 lib 目录
-
wget -O jnetpcap-1.4.r1425 https://downloads.sourceforge.net/project/jnetpcap/jnetpcap/Latest/jnetpcap-1.4.r1425-1.linux64.x86_64.tgz
- tar -xvf jnetpcap-1.4.r1425
- cp jnetpcap-1.4.r1425/libjnetpcap.so /lib/
运行你的程序
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