useBean怎么老是出错了！！！

beauty9235 2006-05-30 04:12:36

userbean.java
import java.sql.*;
public class userbean
{
private String login_name;
private String login_pass;
public void setUsername(String login_name)
{
this.login_name=login_name;
}
public void setPassword(String login_pass)
{
this.login_pass=login_pass;
}
public String getUsername()
{
return login_name;
}
public String getPassword()
{
return login_pass;
}
public String insert()
{
try
{
//连接mysql之code
String driverName="com.mysql.jdbc.Driver";//数据库用户名
String userName="root";//密码
String userPasswd="111111";//数据库名
String dbName="mshow";//表名
String url="jdbc:mysql://localhost/"+dbName+"?user="+userName+"&password="+userPasswd;
Class.forName("org.gjt.mm.mysql.Driver").newInstance();//Class.forName("com.mysql.jdbc.Driver").newInstance();
Connection dbcon=DriverManager.getConnection(url);

//Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
//Connection dbcon=DriverManager.getConnection("jdbc:odbc:test","sa","");
PreparedStatement stat=dbcon.prepareStatement(
"insert admin values(?,?)");
stat.setString(1,login_name);
stat.setString(2,login_pass);
stat.executeUpdate();
return "success";
}
catch(Exception e)
{
System.out.println(e);
return e.toString();
}
}
}

test.java
<html>
<center>
<form method=post action="test1.jsp">
username<input type=text name=login_name>
<br><br>
password<input type=password name=login_pass>
<br><br>
<input type=submit value="注册">
</form>
</center>
</html>
test1.java
<html>
<jsp:useBean id="hello" class="userbean" scope="session" />
<jsp:setProperty name="hello" property="*" />
your username is:<jsp:getProperty name="hello" property="login_name"/>
<br><br>
your password is:<jsp:getProperty name="hello" property="login_pass"/>
<br><br>
<%
out.println(hello.insert());
%>
</html>
###########################出错信息：
type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.apache.jasper.JasperException: Cannot find any information on property 'login_name' in a bean of type 'userbean'
org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:510)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:375)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

root cause

org.apache.jasper.JasperException: Cannot find any information on property 'login_name' in a bean of type 'userbean'
org.apache.jasper.runtime.JspRuntimeLibrary.getReadMethod(JspRuntimeLibrary.java:837)
org.apache.jasper.compiler.Generator$GenerateVisitor.visit(Generator.java:1011)
org.apache.jasper.compiler.Node$GetProperty.accept(Node.java:1062)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:2213)
org.apache.jasper.compiler.Node$Visitor.visit(Node.java:2219)
org.apache.jasper.compiler.Node$Root.accept(Node.java:456)
org.apache.jasper.compiler.Node$Nodes.visit(Node.java:2163)
org.apache.jasper.compiler.Generator.generate(Generator.java:3305)
org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:198)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:295)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:276)
org.apache.jasper.compiler.Compiler.compile(Compiler.java:264)
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:563)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:303)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:314)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:264)
javax.servlet.http.HttpServlet.service(HttpServlet.java:802)

...全文