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/Java/JavaDatabase/JavaDatabase MySQL test
Required plugins for this example: MBS Java Plugin
You find this example project in your Plugins Download as a Xojo project file within the examples folder: /Java/JavaDatabase/JavaDatabase MySQL test
This example is the version from Sun, 17th Mar 2012.
Project "JavaDatabase MySQL test.xojo_binary_project"
Class App Inherits Application
Const kEditClear = "&Delete"
Const kFileQuit = "&Quit"
Const kFileQuitShortcut = ""
End Class
Class Window1 Inherits Window
Control PushButton1 Inherits PushButton
ControlInstance PushButton1 Inherits PushButton
EventHandler Sub Action()
dim i as integer
dim s as string
for i=1 to 10000
InsertCounter=InsertCounter+1
s="INSERT INTO myTable(test_id, test_val,test_val2) VALUES("+str(InsertCounter)+",'HelloWorld','HelloWorld')"
j.ExecuteSQL s
next
End EventHandler
End Control
Control PushButton2 Inherits PushButton
ControlInstance PushButton2 Inherits PushButton
EventHandler Sub Action()
dim r as JavaResultSetMBS
// check second entry
r=j.SelectSQL("SELECT * from myTable limit 10000")
if r<>Nil then
dim n,id as integer
dim s as string
while r.NextRecord
n=n+1
id=r.getInt("test_id")
s=r.getString("test_val")
wend
MsgBox str(n)+" records"
end if
End EventHandler
End Control
Control PushButton3 Inherits PushButton
ControlInstance PushButton3 Inherits PushButton
EventHandler Sub Action()
dim r as JavaResultSetMBS
// check second entry
r=j.SelectSQL("SELECT * from myTable")
if r<>Nil then
dim n,id as integer
dim s as string
while r.NextRecord
id=r.getInt("test_id")
s=r.getString("test_val")
n=n+1
wend
MsgBox str(n)+" records"
end if
r=nil
End EventHandler
End Control
Control List Inherits Listbox
ControlInstance List Inherits Listbox
End Control
Control PushButton5 Inherits PushButton
ControlInstance PushButton5 Inherits PushButton
EventHandler Sub Action()
d.vm.Runtime.gc
End EventHandler
End Control
Control StaticText1 Inherits Label
ControlInstance StaticText1 Inherits Label
End Control
Control Timer1 Inherits Timer
ControlInstance Timer1 Inherits Timer
EventHandler Sub Action()
if d<>Nil then
dim r as JavaRuntimeMBS = d.vm.Runtime
StaticText1.text="RuntimeFreeMemory: "+str(r.FreeMemory)+EndOfLine+"RuntimeMaxMemory: "+str(r.MaxMemory)+EndOfLine+"RuntimeTotalMemory: "+str(r.TotalMemory)
end if
End EventHandler
End Control
EventHandler Sub Open()
dim f as FolderItem = SpecialFolder.Desktop.Child("mysql-connector-java-5.1.6-bin.jar")
if not f.Exists then
MsgBox "Missing mysql connector classes!"
Return
end if
if TargetLinux then
// change path for your linux PC!
JavaVMMBS.SetLibraryPath("/home/cs/jre1.6.0_05/lib/i386/client/libjvm.so")
end if
v=new JavaVMMBS(f)
d=new JavaDatabaseMBS(v,"com.mysql.jdbc.Driver")
j=d.getConnection("jdbc:mysql://localhost:3306","root","")
if j<>Nil then
MsgBox "connected"
j.MyExecuteSQL "CREATE DATABASE JunkDB"
j.MyExecuteSQL "USE JunkDB"
j.MyExecuteSQL "DROP TABLE myTable"
j.MyExecuteSQL "CREATE TABLE myTable(test_id int, test_val char(200) not null,test_val2 char(200) not null, PRIMARY KEY (test_id))"
else
MsgBox "not connected"
end if
Exception e as JavaExceptionMBS
MsgBox e.message
End EventHandler
Property InsertCounter As Integer
Property d As javadatabaseMBS
Property j As JavaConnectionMBS
Property v As javavmMBS
End Class
MenuBar MenuBar1
MenuItem FileMenu = "&File"
MenuItem FileQuit = "#App.kFileQuit"
MenuItem EditMenu = "&Edit"
MenuItem EditUndo = "&Undo"
MenuItem UntitledMenu1 = "-"
MenuItem EditCut = "Cu&t"
MenuItem EditCopy = "&Copy"
MenuItem EditPaste = "&Paste"
MenuItem EditClear = "#App.kEditClear"
MenuItem UntitledMenu0 = "-"
MenuItem EditSelectAll = "Select &All"
End MenuBar
Module JavaUtil
Sub ExecuteSQL(extends c as JavaConnectionMBS, sql as string)
try
dim s as JavaStatementMBS
s=c.createStatement
if s<>nil then
call s.executeUpdate sql
end if
catch d as JavaExceptionMBS
MsgBox d.message+" ErrorCode: "+str(d.errornumber)
end try
End Sub
Sub MyExecuteSQL(extends j as javaconnectionMBS, sql as string)
try
j.ExecuteSQL sql
catch d as JavaExceptionMBS
MsgBox d.message+" ErrorCode: "+str(d.errornumber)
end try
End Sub
Sub MyExecuteSQLwithPreparedStatement(extends j as javaconnectionMBS, sql as string)
try
dim p as JavaPreparedStatementMBS
p=j.prepareStatement(sql)
if p<>Nil then
call p.execute
end if
catch d as JavaExceptionMBS
MsgBox d.message+" ErrorCode: "+str(d.errornumber)
end try
End Sub
Function MySelectSQL(extends j as javaconnectionMBS, sql as string, editable as boolean=false) As JavaResultSetMBS
try
return j.SelectSQL(sql,editable)
catch d as JavaExceptionMBS
MsgBox d.message
end try
End Function
Function MySelectSQLwithPreparedStatement(extends j as javaconnectionMBS, sql as string, editable as boolean=false) As JavaResultSetMBS
try
dim p as JavaPreparedStatementMBS
p=j.prepareStatement(sql)
if p<>Nil then
dim r as JavaResultSetMBS
r=p.executeQuery
r.Tag=p // keep a reference to the statement
Return r
end if
catch d as JavaExceptionMBS
MsgBox d.message
end try
End Function
Function SelectSQL(extends c as JavaConnectionMBS, sql as string, editable as boolean=false) As JavaResultSetMBS
try
dim mode as integer = c.CONCUR_READ_ONLY
dim s as JavaStatementMBS
s=c.createStatement(c.TYPE_FORWARD_ONLY, mode)
if s<>nil then
dim r as JavaResultSetMbs
r=s.executeQuery(sql)
if r<>Nil then
// you need to keep the statement with the
r.Tag=s
Return r
end if
end if
catch d as JavaExceptionMBS
MsgBox d.message+" ErrorCode: "+str(d.errornumber)
end try
End Function
End Module
End Project
See also:
- /Java/JavaDatabase/JavaDatabase MDB
- /Java/JavaDatabase/JavaDatabase MySQL Blob and Clob
- /Java/JavaDatabase/JavaDatabase MySQL test with Threading
- /Java/JavaDatabase/JavaDatabase MySQL with JavaInputStreamMBS
- /Java/JavaDatabase/JavaDatabase SQLite
- /Java/JavaDatabase/JavaDatabase SQLite blob
- /Java/JavaDatabase/JavaDatabase to JSON
The items on this page are in the following plugins: MBS Java Plugin.
