vb.net哈希 vba hash

VB.NET 中 HASHTABLE 的疑问我们知道Hashtable 是线程安全的,可由多个读取器线程或一个写入线程使用 。
它的特点是:通过节点的关键码确定节点的存储位置,即给定节点的关键码k,通过一定的函数关系H(散列函数),得到函数值H(k),将此值解释为该节点的存储地址.
HashMap 与Hashtable很相似,但HashMap 是非同步(unsynchronizded)和可以以null为关键码的.
我们知道在使用内存中的地址时是按照哪里有空闲的就使用哪里的 。怎么可能一直由着我们输入的顺序给你开放地址呢?
VB.NET 获取文件MD5值Public Function md5(ByVal a As String) As String
Dim tempmd5 As System.Security.Cryptography.MD5 = New System.Security.Cryptography.MD5CryptoServiceProvider()
Dim bytResult() As Byte = tempmd5.ComputeHash(System.Text.Encoding.Default.GetBytes(a))
Dim strResult As String = BitConverter.ToString(bytResult)
strResult = strResult.Replace("-", "")
Return strResult
End Function
如果要计算文件的就把参数改成字节数组就可以了,然后获取文件GetBytes()传进去就可以了 。
VB.NET里 Hashtable如何排序 VB.NETHashTable是散列表vb.net哈希,所谓散列即没有顺序可言使用ListT泛型
【VB.NET】这个json怎么解析??用的是Newtonsoft.Json.dll先如下程序集
Imports System.Web.Script.Serialization
Function StringToObject(content As String) As Object
Dim jss As New JavaScriptSerializer()
Return jss.DeserializeObject(content)
End Function
Dim test1 As Dictionary(Of String, Object) = StringToObject("{
"Chr(34)"objects"Chr(34)": {
"Chr(34)"minecraft/sounds/entity/rabbit/attack2.ogg"Chr(34)": {
【vb.net哈希 vba hash】"Chr(34)"hash"Chr(34)": "Chr(34)"4b90ff3a9b1486642bc0f15da0045d83a91df82e"Chr(34)",
"Chr(34)"size"Chr(34)": 7268
},
"Chr(34)"minecraft/sounds/entity/shulker/close5.ogg"Chr(34)": {
"Chr(34)"hash"Chr(34)": "Chr(34)"e555fcece121879fe0becbada9d01dea27ab153d"Chr(34)",
"Chr(34)"size"Chr(34)": 5376
},
"Chr(34)"minecraft/lang/ga_IE.lang"Chr(34)": {
"Chr(34)"hash"Chr(34)": "Chr(34)"a108f19142820b3573a658d40950ba3317b65c15"Chr(34)",
"Chr(34)"size"Chr(34)": 142847
},
"Chr(34)"minecraft/sounds/mob/horse/leather.ogg"Chr(34)": {
"Chr(34)"hash"Chr(34)": "Chr(34)"20abaa7d3b0baa105bc6023d5308f1e5d76acc41"Chr(34)",
"Chr(34)"size"Chr(34)": 11577
}}
}
")
Dim cc As Dictionary(Of String, Object) = DirectCast(test1.Values(0), Dictionary(Of String, Object))
Dim dd = cc.Values(0)("hash")
这样就可以遍历 hash值vb.net哈希了
vb中哈希算法表示方法Private Sub Initialize(ByVal vKeyString As String)
Dim intI As Integer, intJ As Integer
Randomize(Rnd(-1))'得到初始值(种子值)
'每次调用初始值均相同
'根据初始值(种子值)得到随机数序列vb.net哈希,每次调用Initialize时vb.net哈希,初始值均相同 。只要vKeyString相同vb.net哈希,所产生的随机数序列一定相同
For intI = 1 To Len(vKeyString)
intJ = Rnd(-Rnd * AscW(Mid(vKeyString, intI, 1)))
Randomize(intJ)
Next intI
End Sub
Public Sub DoXor(ByRef msFileText As String)
Dim intC As Integer
Dim intB As Integer
Dim lngI As Long
For lngI = 1 To Len(msFileText)
intC = AscW(Mid(msFileText, lngI, 1))
intB = Int(Rnd() * 2 ^ 7)
'选用 =127可正确处理汉字vb.net哈希 , ChrW(n):n 有一个范围
Mid(msFileText, lngI, 1) = ChrW(intC Xor intB)
Next lngI
End Sub
Public Function Hash(ByVal ET As String) As String
Dim BitLenString As String, KeyString As String,
FileText As String
BitLenString = "12345678"
KeyString = ETBitLenString
Call Initialize(KeyString)
'根据KeyString产生随机数序列

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