1. 该实例主要告诉我们怎么样在JSP代码中调用JavaBean构件 2. 使用JavaBean的优点是简化了JSP代码,界面代码和逻辑代码互相分离,便于程序员查看和调试 3. 该实例需要五个文件:login.jsp,test.jsp, userbean.class 4. 首先看一下login.jsp <html> <center> <form method=post action="http://127.0.0.1:8000/test.jsp"> username<input type=text name=username> <br><br> password<input type=password name=password> <br><br> <input type=submit value="注册"> </form> </center> </html> 5. test.jsp代码如下: <html> <jsp:useBean id="hello" class="userbean" scope="session" /> <jsp:setProperty name="hello" property="*" /> your username is:<jsp:getProperty name="hello" property="username"/> <br><br> your password is:<jsp:getProperty name="hello" property="password"/> <br><br> <% out.println(hello.insert()); %> </html> 6. JavaBean构件userbean.java代码如下: import java.sql.*; public class userbean { private String username; private String password; public void setUsername(String username) { this.username=username; } public void setPassword(String password) { this.password=password; } public String getUsername() { return username; } public String getPassword() { return password; } public String insert() { try { Class.forName("sun.jdbc.odbc.JdbcOdbcDriver"); Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa",""); PreparedStatement stat=dbcon.prepareStatement( "insert login values(?,?)"); stat.setString(1,username); stat.setString(2,password); stat.executeUpdate(); return "success"; } catch(Exception e) { System.out.println(e); return e.toString(); } } } 7. 配置方法如下: login,test放在j2ee的public_html中,userbean.class放在j2ee\lib\classes中 |
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