LEAD Technologies发布了LEADTOOLS v19 SDK的重大更新，本次更新侧重于文档和医疗功能，其中一些功能在商业SDK市场中是前所未有的。包括第一个完整的商业Hanging Protocol SDK解决方案、大图像（以TB为单位）支持、文档格式支持以及更新各种识别技术，包含OCR、表单、OMR、条码、信用卡读卡器和Visual Studio 2017的兼容性。
LEADTOOLS v19 （Windows、Linux、IOS/macOS、Android）下载>>>
LEAD Technologies总裁Rich Little表示：“这次更新是LEAD继续加强LEADTOOLS以解决现实问题的一个很好的例子。我们非常高兴能够拥有第一个商业医疗查看器SDK，包括完整的DICOM Hanging Protocol、优化的大图像加载和一个新的超快速表单识别算法。26年前我和Moe创建LEAD时，我们从来没有想过可以加载1TB的图像。”
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Java社区进程（JCP）执行委员会的成员Ben Evans认为最急需重构的应用恰好就是最适合进行模块化的应用。如果你已经备受Lava Flow/God Class/Stovepipe System地狱的折磨，而且你的利益相关方明确知道这一点，那么你可能更容易说服他们进行一次完整的底层重构，通过渐进式的努力形成一个完成的模块解决方案（而不是简单重构并迁移至Java 8）是值得去做的。
对特定类型的应用来说，这是很有帮助的。例如，我曾经见到有的电子商务网站具有非常大的堆空间，其中包含了大约40G的字符串数据。Java 9的ompact Strings技术能够将这种类型的内存使用减半。这反过来又会对GC的性能带来积极的影响。对于有些应用来说（这可能就包括大型的Solr安装环境及类似场景），单单这一项收益就值得将运行时升级到Java 9。
这项变更是很重要的，因为相对于Parallel来说，G1会在应用线程上做更多的事情，而Parallel几乎没有在应用线程上做任何事情，它基本上完全依赖GC线程完成所有的内存管理。这意味着切换到G1将会为应用线程带来额外的工作，从而直接影响到应用的性能。 在很多（甚至可以说大多数）场景中，这种额外的性能损耗都不是什么问题。但是，在这方面，我确实也曾经见过从Parallel切换到G1时，有一定比例的工作负载会引起性能的下降。对于这些应用来说，这种性能下降是无法接受的，所以他们无法切换至G1收集器。随着G1成为默认的收集器，这将会影响到升级至Java 9的每个应用。
import io.javalin.Javalin
funmain(args: Array) {
val app = Javalin.create().port(7000)
app.get("/") { ctx -> ctx.result("Hello World") }
}主题切换选项用于渲染和可视化所有可用的JavaScript主题中的组件。
From: POSTMASTER@domain.com To: jdoe@domain.com Subject: Message Delivery Failure MailEnable: Message Delivery Failure. The following recipient(s) could not be reached: Recipient: [SMTP: bill@domain.com] Reason: The message could not be delivered because the domain name (domain.com) does not appear to be registered.
From: MAILER-DAEMON@domain.local To: jdoe@localhost Subject: Undeliverable mail: Failed to deliver to ''
// Create POP3 object
Pop3 pop = new Pop3();
// Enable logging to file
pop.Log.Enabled = true;
pop.Log.Filename = @"C:\log.txt";
pop.Log.Clear();
// Connect to POP3 server
pop.Connect("mail.domain.com");
pop.Login("bounce", "secret");
// Download headers and bodies of all messages.
MailMessageCollection msgs = pop.DownloadMessageHeaders(1, -1, -1);
// Loop through all messages in the mailbox
foreach (MailMessage msg in msgs)
{
string strLine = msg.BodyPlainText;
Console.WriteLine("From: " + msg.From.Email);
// Get failed email address
string str_invalid_email = GetInvalidEmailAddressME(msg);
// If str_invalid_email is non-empty then failed email
// address was found
if (str_invalid_email.Length > 0)
{
// Remove failed email from database
RemoveEmailFromDatabase(str_invalid_email);
// Display invalid adress
Console.WriteLine("Invalid email: " + str_invalid_email);
// Delete bounced email from server to avoid
// processing it next time
pop.DeleteMessage(msg.IndexOnServer);
}
}
// Disconnect from POP3 server
pop.Disconnect();
// The function checks whether the message is bounced and extracts
// failed address
// from bounced message. Valid only for MailEnable servers
static string GetInvalidEmailAddressME(MailMessage msg)
{
string str_invalid_email = msg.BodyPlainText;
// Check if this is a bounced message report
if (msg.Subject.IndexOf("Delivery Failure") == -1)
{
return "";
}
if (msg.From.ToString().IndexOf("POSTMASTER") == -1)
{
return "";
}
// Now we're sure this is a bounced message report
int i_start;
i_start = str_invalid_email.IndexOf("SMTP:");
// Check if bounced message report contains "Recipient:" field
if (i_start == -1)
{
return "";
}
// Get failed address
i_start += 5;
i_end = str_invalid_email.IndexOf("]",i_start);
str_invalid_email.Substring(i_start, i_end);
return str_invalid_email;
}
// The function checks whether the message is bounced and extracts
// failed address
// from bounced message. Valid only for Communigate Pro servers
static string GetInvalidEmailAddressCP(MailMessage msg)
{
string str_invalid_email = msg.BodyPlainText;
// Check if this is a bounced message report
if (msg.Subject.IndexOf("Undeliverable mail") == -1)
{
return "";
}
if (msg.From.ToString().IndexOf("MAILER-DAEMON") == -1)
{
return "";
}
// Now we're sure this is a bounced message report
int i_start;
i_start = str_invalid_email.IndexOf("to '<");
// Check if bounced message report contains
// "Failed to deliver to " field
if (i_start == -1)
{
return "";
}
// Get failed address
i_start += 5;
i_end = str_invalid_email.IndexOf("]",i_start);
str_invalid_email.Substring(i_start, i_end);
return str_invalid_email;
}
// This function must remove (or disable) specified
// email address from mailing list
static void RemoveEmailFromDatabase(string str_invalid_email)
{
// TODO: Add your code here
}Dim pop As New Pop3
' Enable logging to file
pop.Log.Enabled = True
pop.Log.Filename = "C:\log.txt"
pop.Log.Clear()
' Connect to POP3 server
pop.Connect("mail.domain.com")
pop.Login("jdoe", "secret")
' Download headers and bodies for all messages.
Dim msgs As MailMessageCollection = pop.DownloadMessageHeaders(1, -1, -1)
' Loop through all messages in the mailbox
Dim msg As MailMessage
For Each msg In msgs
Dim strLine As String = msg.BodyPlainText
Console.WriteLine("From: " + msg.From.Email)
' Get failed email address
Dim str_invalid_email As String = GetInvalidEmailAddressME(msg)
' If str_invalid_email is non-empty then failed email
' address was found
If str_invalid_email.Length > 0 Then
'Remove failed email from database
RemoveEmailFromDatabase(str_invalid_email)
' Display invalid address
Console.WriteLine("Invalid email: " & str_invalid_email)
' Delete bounced email from server to avoid
' processing it next time
pop.DeleteMessage(msg.IndexOnServer)
End If
Next
Console.ReadLine()
' Disconnect from POP3 server
pop.Disconnect()
' The function checks whether the message is bounced and extracts
' failed address
' from bounced message. Valid only for MailEnable servers
Function GetInvalidEmailAddressME(ByVal msg As MailMessage) As String
Dim str_invalid_email As String = msg.BodyPlainText
' Check if this is a bounced message report
If msg.Subject.IndexOf("Delivery Failure") = -1 Then
Return ""
End If
If msg.From.ToString().IndexOf("POSTMASTER") = -1 Then
Return ""
End If
' Now we're sure this is a bounced message report
Dim i_start As Integer, i_end As Integer
i_start = str_invalid_email.IndexOf("SMTP:")
' Check if bounced message report contains "Recipient:" field
If i_start = -1 Then
Return ""
End If
' Get failed address
i_start += 5
i_end = str_invalid_email.IndexOf("]", i_start)
str_invalid_email.Substring(i_start, i_end)
Return str_invalid_email
End Function
' The function checks whether the message is bounced and extracts
' failed address
' from bounced message. Valid only for Communigate Pro servers
Function GetInvalidEmailAddressCP(ByVal msg As MailMessage) As String
Dim str_invalid_email As String = msg.BodyPlainText
' Check if this is a bounced message report
If msg.Subject.IndexOf("Undeliverable mail") = -1 Then
Return ""
End If
If msg.From.ToString().IndexOf("MAILER-DAEMON") = -1 Then
Return ""
End If
' Now we're sure this is a bounced message report
Dim i_start As Integer, i_end As Integer
i_start = str_invalid_email.IndexOf("to '<")
' Check if bounced message report contains
' "Failed to deliver to " field
If i_start = -1 Then
Return ""
End If
' Get failed address
i_start += 5
i_end = str_invalid_email.IndexOf("]", i_start)
str_invalid_email.Substring(i_start, i_end)
Return str_invalid_email
End Function
' This function must remove (or disable) specified
' email address from mailing list
Sub RemoveEmailFromDatabase(ByVal str_invalid_email As String)
' TODO: Add your code here
End Sub
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