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对于下面的一个简单XML文档Q?
xml代码Q?
阅读全文
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阅读全文
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(2)一列一列读消息Q但不一定按1??列的序Q也可以按随机顺序，???
(3)得到的消息就是密文消?
注：密钥为字W的话，根据ASII码的大小q行l合?nbsp; 阅读全文
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#针对接口~程Q而不是针对实现编E。（实例化对象时使用多态）
#多用l合Q少用?
{略模式Q定义了法族，分别装hQ让他们可以互相替换Q此模式让算法的变化独立与用算法的客户
阅读全文
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MainKaisa.java
1 import javax.swing.JFrame;
2
3 public class MainKaisa {
4
5 /**
6 * @param nonles
7 */
8 public static void main(String[] args) {
9 //实例化一个窗?/span>
10 KaisaFrame kaisaFrame = new KaisaFrame();
11 kaisaFrame.setVisible(true);
12 kaisaFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
13
14 }
15
16 }
2
3 public class MainKaisa {
4
5 /**
6 * @param nonles
7 */
8 public static void main(String[] args) {
9 //实例化一个窗?/span>
10 KaisaFrame kaisaFrame = new KaisaFrame();
11 kaisaFrame.setVisible(true);
12 kaisaFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
13
14 }
15
16 }
Kaisa.java
1 mport java.awt.event.ActionEvent;
2 import java.awt.event.ActionListener;
3 import javax.swing.*;
4
5 public class KaisaFrame extends JFrame {
6
7 JLabel jlDackText = new JLabel();
8 JButton btnBrightText = new JButton();
9 JPasswordField jpf = new JPasswordField();
10 JTextField jtf2 = new JTextField();
11 char[] buf;
12
13
14 public KaisaFrame() {
15 this.setSize(300,200); //讄H体大小
16 this.setTitle("凯撒加密?/span>");
17 this.setResizable(false);
18
19 jbInit();
20 }
21
22 private void isLetter() {
23 //判断输入的内Ҏ否ؓ字母
24 buf = jpf.getPassword();
25 for(char c:buf) {
26 if(Character.isLetter(c) == false) {
27 JOptionPane.showMessageDialog(this, "不能为非字符", "Error", JOptionPane.ERROR_MESSAGE);
28 jpf.setText("");
29 jtf2.setText("");
30 return;
31 } else {
32 makeBrightText();
33 }
34 }
35 }
36
37 private void makeBrightText() {
38 // 产生明文
39 char[] arr = new char[buf.length];
40 int index=0,temp;
41 for(char c:buf) {
42 temp = c+3; //字母后移三位
43 if( (temp>90 && temp<97) || temp>122 ) {
44 //若ASCII码在此区间则减去26(使字WXYZ,xyz循环到XAB,xab)
45 temp = temp - 26;
46 arr[index++] = (char)temp;
47 } else {
48 arr[index++] = (char)temp;
49 }
50 }
51
52 String str = new String(arr);
53 jtf2.setText(str);
54
55 }
56
57 private void jbInit() {
58 // 讄H体内容
59 this.setLayout(null);
60 jlDackText.setText("输入密文Q?/span>");
61 jlDackText.setBounds(30, 20, 80, 30);
62 btnBrightText.setText("生成明文Q?/span>");
63 btnBrightText.setBounds(30, 90, 100, 30);
64 jpf.setBounds(160, 20, 80, 30);
65 jpf.setEchoChar('*');
66 jtf2.setBounds(160, 90, 80, 30);
67 jtf2.setEditable(false);
68
69 this.add(jlDackText);
70 this.add(jpf);
71 this.add(btnBrightText);
72 this.add(jtf2);
73
74 btnBrightText.addActionListener(new ActionListener(){
75
76 @Override
77 public void actionPerformed(ActionEvent e) {
78 isLetter(); //判断输入的内Ҏ否ؓ字母
79 }
80
81 });
82 }
83
84 }
85
2 import java.awt.event.ActionListener;
3 import javax.swing.*;
4
5 public class KaisaFrame extends JFrame {
6
7 JLabel jlDackText = new JLabel();
8 JButton btnBrightText = new JButton();
9 JPasswordField jpf = new JPasswordField();
10 JTextField jtf2 = new JTextField();
11 char[] buf;
12
13
14 public KaisaFrame() {
15 this.setSize(300,200); //讄H体大小
16 this.setTitle("凯撒加密?/span>");
17 this.setResizable(false);
18
19 jbInit();
20 }
21
22 private void isLetter() {
23 //判断输入的内Ҏ否ؓ字母
24 buf = jpf.getPassword();
25 for(char c:buf) {
26 if(Character.isLetter(c) == false) {
27 JOptionPane.showMessageDialog(this, "不能为非字符", "Error", JOptionPane.ERROR_MESSAGE);
28 jpf.setText("");
29 jtf2.setText("");
30 return;
31 } else {
32 makeBrightText();
33 }
34 }
35 }
36
37 private void makeBrightText() {
38 // 产生明文
39 char[] arr = new char[buf.length];
40 int index=0,temp;
41 for(char c:buf) {
42 temp = c+3; //字母后移三位
43 if( (temp>90 && temp<97) || temp>122 ) {
44 //若ASCII码在此区间则减去26(使字WXYZ,xyz循环到XAB,xab)
45 temp = temp - 26;
46 arr[index++] = (char)temp;
47 } else {
48 arr[index++] = (char)temp;
49 }
50 }
51
52 String str = new String(arr);
53 jtf2.setText(str);
54
55 }
56
57 private void jbInit() {
58 // 讄H体内容
59 this.setLayout(null);
60 jlDackText.setText("输入密文Q?/span>");
61 jlDackText.setBounds(30, 20, 80, 30);
62 btnBrightText.setText("生成明文Q?/span>");
63 btnBrightText.setBounds(30, 90, 100, 30);
64 jpf.setBounds(160, 20, 80, 30);
65 jpf.setEchoChar('*');
66 jtf2.setBounds(160, 90, 80, 30);
67 jtf2.setEditable(false);
68
69 this.add(jlDackText);
70 this.add(jpf);
71 this.add(btnBrightText);
72 this.add(jtf2);
73
74 btnBrightText.addActionListener(new ActionListener(){
75
76 @Override
77 public void actionPerformed(ActionEvent e) {
78 isLetter(); //判断输入的内Ҏ否ؓ字母
79 }
80
81 });
82 }
83
84 }
85
现实图解Q?nbsp;
往文本框中输入密文Q只限字W）Q点L钮，即生成相应密文?
若输入ؓ非字W，则弹出错误框~
单的一个程序，说明都不用了。。?br />
]]>
RailFence.java
1 import java.io.BufferedReader;
2 import java.io.FileWriter;
3 import java.io.IOException;
4 import java.io.InputStreamReader;
5 import java.io.PrintWriter;
6
7 public class RailFence {
8
9 public static void main(String[] args) {
10 char[] buf;
11 String str = new String("");
12 StringBuffer sb1 = new StringBuffer("");
13 StringBuffer sb2 = new StringBuffer("");
14
15 BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
16 try {
17 PrintWriter out = new PrintWriter(new FileWriter("d:""czl.txt"));
18 while((str=in.readLine())!= null) {
19 if(str.equalsIgnoreCase("exit")) break; //退出操?/span>
20 System.out.println("明文Q?/span>"+str); //输入的字符串打印到控制?/span>
21 out.println("============栅栏加密技?============");
22 out.println("明文Q?/span>"+str);
23 buf = str.toCharArray(); //输入的字符串{变ؓ字符数组
24 for(int i=0;i<buf.length;i++) {
25 //位|ؓ0??..攑֜sb1中，单数放sb2?/span>
26 if(i%2 == 0)
27 sb1.append(buf[i]);
28 else
29 sb2.append(buf[i]);
30 }
31 out.println("密文Q?/span>"+sb1.append(sb2)); //合ƈ两个数组
32 }
33 out.flush();
34 out.close();
35 } catch (IOException e) {
36 e.printStackTrace();
37 }
38
39 }
40
41 }
2 import java.io.FileWriter;
3 import java.io.IOException;
4 import java.io.InputStreamReader;
5 import java.io.PrintWriter;
6
7 public class RailFence {
8
9 public static void main(String[] args) {
10 char[] buf;
11 String str = new String("");
12 StringBuffer sb1 = new StringBuffer("");
13 StringBuffer sb2 = new StringBuffer("");
14
15 BufferedReader in = new BufferedReader(new InputStreamReader(System.in));
16 try {
17 PrintWriter out = new PrintWriter(new FileWriter("d:""czl.txt"));
18 while((str=in.readLine())!= null) {
19 if(str.equalsIgnoreCase("exit")) break; //退出操?/span>
20 System.out.println("明文Q?/span>"+str); //输入的字符串打印到控制?/span>
21 out.println("============栅栏加密技?============");
22 out.println("明文Q?/span>"+str);
23 buf = str.toCharArray(); //输入的字符串{变ؓ字符数组
24 for(int i=0;i<buf.length;i++) {
25 //位|ؓ0??..攑֜sb1中，单数放sb2?/span>
26 if(i%2 == 0)
27 sb1.append(buf[i]);
28 else
29 sb2.append(buf[i]);
30 }
31 out.println("密文Q?/span>"+sb1.append(sb2)); //合ƈ两个数组
32 }
33 out.flush();
34 out.close();
35 } catch (IOException e) {
36 e.printStackTrace();
37 }
38
39 }
40
41 }
]]>
2.myapp下新Z个目?/span>WEB-INFQ注意，目录名称是区分大写的；
3.WEB-INF下新Z个文?/span>web.xmlQ内容如下：
1 <?xml version="1.0" encoding="ISO-8859-1"?>
2
3 <!DOCTYPE web-app
4 PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
5 "http://java.sun.com/dtd/web-app_2_3.dtd">
6
7 <web-app>
8 <display-name>My Web Application</display-name>
9 <description>
10 A application for test.
11 </description>
12 </web-app>
2
3 <!DOCTYPE web-app
4 PUBLIC "-//Sun Microsystems, Inc.//DTD Web Application 2.3//EN"
5 "http://java.sun.com/dtd/web-app_2_3.dtd">
6
7 <web-app>
8 <display-name>My Web Application</display-name>
9 <description>
10 A application for test.
11 </description>
12 </web-app>
4.?/span>myapp下新Z个测试的jsp面Q文件名?/span>index.jspQ文件内容如?br />
1 <html>
2 <body>
3 <center>
4 Now time is: <%=new java.util.Date()%>
5 </center>
6 </body>
7 </html>
5.重启Tomcat 2 <body>
3 <center>
4 Now time is: <%=new java.util.Date()%>
5 </center>
6 </body>
7 </html>
6.打开览器，输入http://localhost:8080/myapp/index.jsp看到当前旉的话说明成功了
W二?/span>Q徏立自qServletQ?br /> 写入你的W一个Servlet:
在你新徏的Application myapp/WEB-INF/classes/test目录下新建HelloWorld.java
1 package test;
2
3 import java.io.*;
4 import javax.servlet.*;
5 import javax.servlet.http.*;
6 public class HelloWorld extends HttpServlet
7 {
8 public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
9 {
10 response.setContentType("text/html");
11 PrintWriter out = response.getWriter();
12 out.println("<html><head><title>");
13 out.println("This is my first Servlet");
14 out.println("</title></head><body>");
15 out.println("<h1>Hello,World!</h1>");
16 out.println("</body></html>");
17
18 }
19 }
把Tomcat中lib里面?/font>servlet-api.jar文g拯到C:"JDK"jre"lib"ext?/font>Q编?font size="2">HelloWorld.java2
3 import java.io.*;
4 import javax.servlet.*;
5 import javax.servlet.http.*;
6 public class HelloWorld extends HttpServlet
7 {
8 public void doGet(HttpServletRequest request,HttpServletResponse response)throws ServletException,IOException
9 {
10 response.setContentType("text/html");
11 PrintWriter out = response.getWriter();
12 out.println("<html><head><title>");
13 out.println("This is my first Servlet");
14 out.println("</title></head><body>");
15 out.println("<h1>Hello,World!</h1>");
16 out.println("</body></html>");
17
18 }
19 }
Servlet必须使用C:"Tomcat"webapps"myapp"WEB-INFq个目录下面的web.xml文gq行注册Q用EditPlus打开q个web.xml文gQ在<web-app></web-app>d下面q段E序:
1 package test;
2 public class TestBean
3 {
4 private String name =null;
5 public TestBean(String nameInit){
6 this.name = nameInit;
7 }
8 public void setName(String newName){
9 this.name=newName;
10 }
11 public String getName(){
12 return this.name;
13 }
14 }
然后照样?font color="#ff9900">javac TestBean.java来编译这个文件?br />2 public class TestBean
3 {
4 private String name =null;
5 public TestBean(String nameInit){
6 this.name = nameInit;
7 }
8 public void setName(String newName){
9 this.name=newName;
10 }
11 public String getName(){
12 return this.name;
13 }
14 }
2.然后在你新徏的应用程序目?font color="#ff0000">myapp下新Z个新的jsp文gQtestBean.jsp
1 <%@ page import="test.TestBean" %>
2 <html>
3 <head>
4 <title>Test Bean</title>
5 </head>
6 <body>
7 <center>
8 <%
9 TestBean testBean = new TestBean("Http://czl.cn");
10 %>
11 Java Bean Test:
12 The author's blog address is<%=testBean.getName()%>
13 </center>
14 </body>
15 </html>
定各个文g的位|，如下2 <html>
3 <head>
4 <title>Test Bean</title>
5 </head>
6 <body>
7 <center>
8 <%
9 TestBean testBean = new TestBean("Http://czl.cn");
10 %>
11 Java Bean Test:
12 The author's blog address is<%=testBean.getName()%>
13 </center>
14 </body>
15 </html>
myapp"index.jsp
myapp"testBean.jsp
myapp"WEB-INF"web.xml
myapp"WEB-INF"classes"test"HelloWorld.class
myapp"WEB-INF"classes"test"TestBean.class
myapp"testBean.jsp
myapp"WEB-INF"web.xml
myapp"WEB-INF"classes"test"HelloWorld.class
myapp"WEB-INF"classes"test"TestBean.class
3.重启Tomcat如果需要的话，在浏览器输入:http://localhost:8080/myapp/testBean.jsp q运的话׃看到:
Java Bean Test: The author's blog address isHttp://czl.cn
q样完成了整个Tomcat下的jsp、servlet和javabean的配|?br />W四步：配置虚拟目录
打开 Tomcat6.0"conf"server.xml 文gQ在 <Host> ?</Host> 之间加入
<Context path="/myapp" docBase="D:"myapp" debug="0" reloadable="true" crossContext="true" />
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