Java EJB の暗号化と復号化の原則の例

加密与解密原理の一例

package lockunlock; 

インポート Java.awt.*; 
import java.awt.event.*; 
import java.Applet.*; 
import javax.Swing.*; 
import java.util.*; 
public class LockUnlock extends JApplet {
private boolean isStandalone = false; 
//パラメータ値を取得します。
public String getParameter(String key, String def) {
return isStandalone ? System.getProperty(key, def) :
(getParameter(key) != null ? getParameter(key) : def); 
}

//アプレットを構築する
public LockUnlock() {
}
//アプレットを初期化する
public void init() {
try {
jbInit(); 
}
catch(Exception e) {
e.printStackTrace(); 
}
}
//コンポーネントの初期化
private void jbInit() throws Exception {
contentPane = (JPanel) this.getContentPane(); 
jLabel1.setText("String"); 
jLabel1.setBounds(new Rectangle(35, 36, 57, 21)); 
contentPane.setLayout(null); 
this.setSize(new Dimension(400, 300)); 
jLabel2.setText("文字列の長さ"); 
jLabel2.setBounds(new Rectangle(29, 73, 69, 22)); 
jTextField1.setText(""); 
jTextField1.setBounds(new Rectangle(108, 40, 166, 17)); 
jTextField2.setText(""); 
jTextField2.setBounds(new Rectangle(107, 72, 56, 21)); 
jButton1.setBounds(new Rectangle(30, 236, 137, 27)); 
jButton1.setText("演習 3"); 
jButton1.addActionListener(new LockUnlock_jButton1_actionAdapter(this)); 
jButton2.setBounds(new Rectangle(218, 237, 131, 27)); 
jButton2.setText("演習 4"); 
jButton2.addActionListener(new LockUnlock_jButton2_actionAdapter(this)); 
jTextField3.setText(""); 
jTextField3.setBounds(new Rectangle(106, 105, 58, 21)); 
jLabel3.setText("MoShu"); 
jLabel3.setBounds(new Rectangle(36, 106, 86, 18)); 
contentPane.add(jLabel1, null); 
contentPane.add(jButton2, null); 
contentPane.add(jButton1, null); 
contentPane.add(jLabel3, null); 
contentPane.add(jTextField2, null); 
contentPane.add(jLabel2, null); 
contentPane.add(jTextField3, null); 
contentPane.add(jTextField1, null); 

}
//アプレット情報の取得
public String getAppletInfo() {
return "アプレット情報"; 
}
//パラメータ情報の取得
public String[][] getParameterInfo() {
return null; 
}
//Main メソッド
public static void main(String[] args) {
LockUnlock applet = new LockUnlock(); 
applet.isStandalone = true; 
JFrame frame = new JFrame(); 
//EXIT_ON_CLOSE == 3
frame.setDefaultCloseOperation(3); 
frame.setTitle("アプレットフレーム"); 
frame.getContentPane().add(applet, BorderLayout.CENTER); 
アプレット.init(); 
applet.start(); 
frame.setSize(400,320); 
寸法 d = Toolkit.getDefaultToolkit().getScreenSize(); 
frame.setLocation((d.width - frame.getSize().width) / 2, (d.height - frame.getSize().height) / 2); 
frame.setVisible(true); 
}

//ルック＆フィール設定用の静的イニシャライザ
static {
try {
//UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); 
//UIManager.setLookAndFeel(UIManager.getCrossPlatformLookAndFeelClassName()); 
}
catch(例外 e) {
}
}
//DataMember を宣言します
int インデックス

//---------------------------- --- ------------------------
JPanel contentPane;
JLabel jLabel1 = new JLabel(); jLabel2 = new JLabel();
JTextField jTextField2 = new JTextField();
JButton jButton1 = new JButton(); ; 🎜>JTextField jTextField3 = new JTextField();
JLabel jLabel3 = new JLabel(); -N! ----------------------------------
public int function(int N){
if(N==1 )
return 1;
else{
return N*function(N-1)
/* は RETURN 関数 (N-1) ではありません。ただし N*function(N- 1);*/
}
}
//----------再帰を使用して文字列の完全な配置を見つけます----- ------- -----------
public void Arrange(String prefix,String suffix,int[] Array){
String newPrefix,newSuffix
int numOfChars; =suffix.length();
if(numOfChars==1){
Array[index]=Integer.parseInt(prefix suffix);
else{
for(int i=1 ; inewSuffix=suffix.substring(1,numOfChars);
newPrefix=prefix suffix.charAt(0); newSuffix,Array);
suffix=newSuffix suffix.charAt(0);
}
}
}
//----------最小値から順に並べる最大値----- -------------
/*public void RankForArrange(int[] Array){
intbottom=Array.length-1; int temp;
for (int i=bottom;i>0;i--){
for(int j=0;jif(Array[j]>配列[j 1]){
temp =配列[j];
配列[j] =配列[j 1]
}
}
}
}
*/
//--------照準番号を見つける-------- ------- ------
public int FindAim(int aim,int[] Array){
boolean isFound=false;
int location=0; =Array.length;
for(int i=0;iif(Array[i]==aim){
location=i;
}
}
if(isFound)
場所を返す;
else
System.out.println("Not Found"); ※次の場合は返品できません。*/
}

//------文字列の作成---------------- ---------------
public String CreatString(int length){
StringBuffer BufString=new StringBuffer(); 
for(int i=1;iBufString.append(i) ; 
}
return BufString.toString(); 
}
//-----------OutPut Result---------
public void OutPutResult1() {
インデックス = 0; //0 にクリア
String AimString、プレフィックス; 
AimString = jTextField1.getText(); 
int Length = AimString.length(); 
String strLength = String.valueOf(Length); 
int Aim = Integer.parseInt(AimString); 
/* 方法.parseInt才是转换はint型
しかし.getInteger*/
int[] EachArrange = new int[this.function(Length)]; 
jTextField2.setText(strLength); 
プレフィックス = ""; //空の文字列を作成します。
if (AimString.length()>>2 &&
AimString.length() Arrange(prefix, AimString, EachArrange) ; 
//RankForArrange(EachArrange); 
Arrays.sort(EachArrange); 
String result = String.valueOf(FindAim(Aim, EachArrange)); 
jTextField3.setText(結果); 
}
else {
System.out.println("文字列が短すぎます"); 
}
}

//----------出力 結果 2----------- -
public void OutPutRestlt2(){
index=0;//インデックスを0に戻します
String strLength, strMoShu,
AimString, prefix,suffix; 
int 長さ, MoShu,limit; 
strLength = jTextField2.getText(); 
strMoShu = jTextField3.getText(); 
長さ = Integer.parseInt(strLength); 
MoShu = Integer.parseInt(strMoShu); 
limit = 関数(長さ); 
int[] EachArrange = new int[this.function(Length)]; 
if (Length > 2&&LengthstrLength!=""&&strMoShu!=""
&&MoShuprefix = ""; 
suffix =CreatString(Length); 
Arrange(プレフィックス、サフィックス、EachArrange); 
Arrays.sort(EachArrange); 
String strResult=String.valueOf(EachArrange[MoShu]); 
jTextField1.setText(strResult); 
}
else
System.out.println("Input Ouf MoShu, Try again") ; 
}

void jButton1_actionPerformed(ActionEvent e) {
this.OutPutResult1(); 
}

void jButton2_actionPerformed(ActionEvent e) {
this.OutPutRestlt2(); 
}
//----------------------------------------------------- ------------------

}

class LockUnlock_jButton1_actionAdapter implements java.awt.event.ActionListener {
LockUnlock adaptee; 

LockUnlock_jButton1_actionAdapter(LockUnlock adaptee) {
this.adaptee = adaptee; 
}
public void actionPerformed(ActionEvent e) {
adaptee.jButton1_actionPerformed(e); 
}
}

class LockUnlock_jButton2_actionAdapter implements java.awt.event.ActionListener {
LockUnlock adaptee; 

LockUnlock_jButton2_actionAdapter(LockUnlock adaptee) {
this.adaptee = adaptee; 
}
public void actionPerformed(ActionEvent e) {
adaptee.jButton2_actionPerformed(e); 
}
}