17mon / java Goto Github PK

在spark中使用,在执行端会报序列化的问题？

Exception in thread "main" java.lang.IndexOutOfBoundsException
at java.nio.Buffer.checkIndex(Unknown Source)
at java.nio.HeapByteBuffer.getInt(Unknown Source)
at org.casper.iptest.IPExt.find(IPExt.java:66)
at org.casper.iptest.IPExt.main(IPExt.java:18)

以下代码前面一半少了一个括号：
(0xFF & indexBuffer.get(start + 7) << 8) + (0xFF & indexBuffer.get(start + 8));
<<的优先级高于&，导致前面这部分算出来总是0，正确的应该是：
((0xFF & indexBuffer.get(start + 7)) << 8) + (0xFF & indexBuffer.get(start + 8));

Exception in thread "main" java.nio.BufferUnderflowException
at java.base/java.nio.HeapByteBuffer.get(HeapByteBuffer.java:191)
at com.ip.IPExt.load(IPExt.java:107)
at com.ip.IPExt.load(IPExt.java:34)
at com.ip.IPExt.main(IPExt.java:15)

I just downloaded the source code and data file. The IP.java runs very well, but the IPExt.java met some errors. Do you have any idea?

public static void main(String[] args) {
    IPExt.load("data/17monipdb.dat");

    System.out.println(Arrays.toString(IPExt.find("8.8.8.8")));
    System.out.println(Arrays.toString(IPExt.find("118.28.8.8")));
    System.out.println(Arrays.toString(IPExt.find("255.255.255.255")));
}

Exception in thread "main" java.lang.IndexOutOfBoundsException at java.nio.Buffer.checkIndex(Buffer.java:546) at java.nio.HeapByteBuffer.getInt(HeapByteBuffer.java:365) at com.yiming187.jnetpcap_example.ip.IPExt.find(IPExt.java:66) at com.yiming187.jnetpcap_example.ip.IPExt.main(IPExt.java:18)

find的返回函数应改为

return new String(areaBytes, Charset.forName("UTF-8")).split("\t");

以避免在非utf8编码平台上打印时的乱码。

在进行日志分析处理时，大量的 IP.find 对整体运行时间的影响很大

for (start = start * 9 + 262144; start < max_comp_len; start += 9) {
tmpInt = int2long(indexBuffer.getInt(start));
if (tmpInt >= ip2long_value) {
index_offset = bytesToLong(b, indexBuffer.get(start + 6), indexBuffer.get(start + 5), indexBuffer.get(start + 4));
index_length = ((0xFF & indexBuffer.get(start + 7)) << 8) + (0xFF & indexBuffer.get(start + 8));
break;
}
}

这段代码tmpInt 解析出来在是终止ip，请问起始ip要怎么解析

用IPCounty解析区县版datx格式地址库报错,ip data not found

in IP.java:
why "import java.util.concurrent.locks.ReentrantLock" ,
why not "java.util.concurrent.locks.ReentrantReadWriteLock"?