How to use java to implement a simple housing management program
This article mainly introduces how to use java to achieve a simple housing management program, has a certain reference value, interested friends can refer to, I hope you can learn a lot after reading this article, the following let Xiaobian take you to understand.
/ *
Application form for household housing
, /
Public class ApplicationInfo {
Private String name = null
Private String age = null
Private String length_service = null
Private String head_name = null
Private String post = null
Private String population = null
Private String grade = null
Private String apply_type = null
Public ApplicationInfo () {
}
/ *
Use an array to save the user's application information.
, /
Public void setAllAttribute (String result []) {
Name = result [0]
Age = result [1]
Length_service = result [2]
Head_name = result [3]
Post = result [4]
Population = result [5]
Grade = result [6]
Apply_type = result [7]
}
/ *
Get all kinds of application information from users
Including name, age, length of service, position, professional title, family population, etc.
information.
, /
Public String getApplyType () {
Return apply_type
}
Public String getName () {
Return name
}
Public String getAge () {
Return age
}
Public String getLengthService () {
Return length_service
}
Public String getPost () {
Return post
}
Public String getHeadName () {
Return head_name
}
Public String getPopulation () {
Return population
}
Public String getGrade () {
Return grade
}
}
/ / /
/ *
Used to show vacant rooms
Housing
Statistics on the total number of houses.
It's rough.
, /
Import java.awt.*
Import java.awt.event.*
Import java.awt.geom.*
Import javax.swing.*
Public class BarChartInfo extends JPanel {
Private static final int SCALE = 2
Private static final int CHARTCOUNT = 3
Private static final int BARSPACING = 20
Private static final String CHARTTITEL = "HouseNumberGraphics"
Private static final Font CURRENTFONT= new Font ("Courier", Font.BOLD,12)
Private static FontMetrics cfm
Private static int MAXLABELWIDTH = 0
Private static int BARWIDTH = 0
Private static int MAX = 0
Private int values []
Private Color colors []
Private String labels []
Public BarChartInfo (int valueInfo []) {
Cfm = getFontMetrics (CURRENTFONT)
Values = new int [CHARTCOUNT]
Colors = new Color [CHARTCOUNT]
Labels = new String [CHARTCOUNT]
Colors [0] = Color.red
Colors [1] = Color.green
Colors [2] = Color.blue
For (int iTuno witi MAX) {
MAX = values [I]
}
Labels [0] = "RemainHouseNumber:"
Labels [1] = "DistributeHouseNumber:"
Labels [2] = "AllHouseNumber:"
MAXLABELWIDTH = Math.max (cfm.stringWidth (labels [I])
MAXLABELWIDTH)
}
BARWIDTH = CURRENTFONT.getSize ()
SetSize (Math.max (MAX*SCALE)
Cfm.stringWidth (CHARTTITEL)) + MAXLABELWIDTH+5
(CHARTCOUNT* (BARWIDTH+BARSPACING)) + CURRENTFONT.getSize () + 10)
}
Public void update (Graphics g) {
G.clearRect (0re0jue getWidth (), getHeight ())
PaintComponent (g)
}
Public void paintComponent (Graphics g) {
Super.paintComponent (g)
Graphics2D G2D = (Graphics2D) g
G2D.setFont (CURRENTFONT)
G2D.setColor (Color.black)
Int i,cx,cy
I = cfm.stringWidth (CHARTTITEL)
For (I = 0 * * I < CHARTCOUNT; iTunes +) {
Cy = (BARWIDTH + BARSPACING) * I) + BARSPACING
Cx = MAXLABELWIDTH + 1
Cx + = Math.max ((getWidth ()-(MAXLABELWIDTH + 1 + (MAX*SCALE) / 2jing0)
G2D.setColor (Color.black)
G2D.drawString (labels [I], cx-MAXLABELWIDTH-1
Cy + cfm.getAscent ()
G2D.fillRect (cx+3,cy+5, (values [I] * SCALE), BARWIDTH)
G2D.setColor (colors [I])
G2D.fillRect (cx,cy, (values [I] * SCALE), BARWIDTH)
G2D.drawString ("" + values [I], cx+ (values [I] * SCALE) + 3
Cy + cfm.getAscent ()
}
}
}
/ / /
/ *
Write the user's application information into the room distribution file.
A month later, the information is read out by the system, and then the rooms are divided.
, /
Import java.io.*
Public class CreateApplyQueueFile extends Thread {
Private boolean isOver
Private StringBuffer buffer
Public CreateApplyQueueFile (StringBuffer buffer) {
IsOver = false
This.buffer = buffer
}
Public void run () {
Try {
PrintWriter out= new PrintWriter (
New BufferedWriter (
New FileWriter ("house.tmp", true)), true)
Out.println (buffer)
Out.close ()
}
Catch (Exception e) {e.printStackTrace ();}
IsOver = true
}
Public boolean isOver () {
Return isOver
}
}
/ /
/ *
To split the room.
, /
Import java.io.*
Import java.sql.*
Import java.util.*
Import javax.swing.*
Public class DistributeHouse extends Thread {
Private Vector houseInfoVector
Private Vector applyVector
Private Connection connection
Private StringBuffer resultBuffer
Private JTextArea textArea
Public DistributeHouse (Connection connection,JTextArea textArea) {
ResultBuffer = new StringBuffer ()
HouseInfoVector = new Vector ()
ApplyVector = new Vector ()
This.connection = connection
This.textArea = textArea
}
Public void run () {
LoadApplyQueueFile ()
DistributeHouse ()
}
/ *
Read out the applicant's information from the room allocation file and add it to the vector for use in the room allocation.
, /
Private synchronized void LoadApplyQueueFile () {
Try {BufferedReader reader = new BufferedReader (
New FileReader ("house.tmp"))
String s = null
While ((s = reader.readLine ())! = null) {
ApplicationInfo applyInfo = new ApplicationInfo ()
StringTokenizer stk = new StringTokenizer (s)
String result [] = new String [8]
Int iTunes 0
While (stk.hasMoreElements ()) {
Result [I] = stk.nextToken ("*")
ITunes +
}
ApplyInfo.setAllAttribute (result)
ApplyVector.addElement (applyInfo)
}
Reader.close ()
}
Catch (Exception e) {e.printStackTrace ();}
}
/ *
After the allocation of rooms, update the allocation documents to be empty files.
Prepare the next batch of rooms for use.
, /
Private synchronized void DeleteApplyQueueFile () {
Try {
FileOutputStream fos = new FileOutputStream ("house.tmp")
Fos.close ()
}
Catch (Exception e) {e.printStackTrace ();}
}
/ *
Randomly read out the applicant grade from the vector, connect to the database, and make related queries and updates.
, /
Private synchronized void distributeHouse () {
VacantHouseInfo info = null
While (! applyVector.isEmpty ()) {
ApplicationInfo applyInfo = (ApplicationInfo) applyVector.elementAt (0)
String grade = getGrade (applyInfo)
Int accordHouseNum = getVacantHouseInfo (grade)
Int randomIndex = (int) (accordHouseNum*Math.random ())
Info = (VacantHouseInfo) houseInfoVector.elementAt (randomIndex)
UpdateRentFile (info,applyInfo)
UpdateLodgingHouseFile (info,applyInfo)
UpdateVacantHouseFile (info)
DisplayResult (info,applyInfo)
ApplyVector.remove (0)
HouseInfoVector.removeAllElements ()
}
DeleteApplyQueueFile ()
}
/ *
Get a vacancy rating. Vacancy grade assumption and applicant's age, length of service, position, etc.
It's about. The functional relationship is not given here, it can be set to 3, 5, etc.
, /
Private synchronized int getVacantHouseInfo (String houseGrade) {
Int value =-1
Try {
PreparedStatement Stmt = connection.prepareStatement (
"select * FROM vacancy file WHERE House rating = +
HouseGrade + ")
ResultSet result = Stmt.executeQuery ()
ResultSetMetaData metadata = result.getMetaData ()
String houseInfo [] = new String [5]
While (result.next ()) {
For (int iTunes 1)
