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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