JSP问题，The value for the XXX is invalid.

[zpinggg]

生成的DDbean.class，打开时提示“Invalid or corrupt jarfile”。为什么会出错呢？


index.jsp 前三行：
<%@ page contentType="text/html;charset=gb2312" import="java.sql.*"%>
<%@ include file="top.htm"%>
<jsp:useBean id="conn" class="dbBean.DBBean" scope="session"/>

==============分割线==========
出错提示：


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

exception ：
org.apache.jasper.JasperException: /index.jsp(3,0) The value for the useBean class attribute dbBean.DBBean is invalid.
org.apache.jasper.compiler.DefaultErrorHandler.jspError(DefaultErrorHandler.java:40)
等等，后面一长串。
===========分割线========
下面是代码，然后生成的DDbean.class，打开时提示“Invalid or corrupt jarfile”。为什么会出错呢？

package dbBean;

import java.io.PrintStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DBBean
{
private String driverStr = "sun.jdbc.odbc.JdbcOdbcDriver";
private String connStr = "jdbc:odbc:mydbsource";
private Connection conn = null;
private Statement stmt = null;

public DBBean()
{
try
{
Class.forName(this.driverStr);
}
catch (ClassNotFoundException localClassNotFoundException) {
System.out.println(localClassNotFoundException.getMessage());
}
}

public void setDriverStr(String paramString) {
this.driverStr = paramString;
}

public void setConnStr(String paramString) {
this.connStr = paramString;
}

public ResultSet executeQuery(String paramString) {
ResultSet localResultSet = null;
try {
this.conn = DriverManager.getConnection(this.connStr);
this.stmt = this.conn.createStatement();
localResultSet = this.stmt.executeQuery(paramString);
}
catch (SQLException localSQLException) {
System.out.println(localSQLException.getMessage());
}
return localResultSet;
}

public int executeUpdate(String paramString) {
int i = 0;
try {
this.conn = DriverManager.getConnection(this.connStr);
this.stmt = this.conn.createStatement();
i = this.stmt.executeUpdate(paramString);
}
catch (SQLException localSQLException) {
System.out.println(localSQLException.getMessage());
}
return i;
}

public void close() {
try {
this.stmt.close();
this.conn.close();
}
catch (SQLException localSQLException) {
System.out.println(localSQLException.getMessage());
}
}
}

[zpinggg]

<jsp:useBean id="conn" class="dbBean.DBBean" scope="session"/>

这句话 应该没错吧。


用Myeclipse和java命令，把那个源代码生成了.class文件，为什么出错了啊？

package dbBean;

import java.io.PrintStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DBBean
{
  private String driverStr = "sun.jdbc.odbc.JdbcOdbcDriver";
  private String connStr = "jdbc:odbc:mydbsource";
  private Connection conn = null;
  private Statement stmt = null;

  public DBBean()
  {
  try
  {
  Class.forName(this.driverStr);
  }
  catch (ClassNotFoundException localClassNotFoundException) {
  System.out.println(localClassNotFoundException.getMessage());
  }
  }

  public void setDriverStr(String paramString) {
  this.driverStr = paramString;
  }

  public void setConnStr(String paramString) {
  this.connStr = paramString;
  }

  public ResultSet executeQuery(String paramString) {
  ResultSet localResultSet = null;
  try {
  this.conn = DriverManager.getConnection(this.connStr);
  this.stmt = this.conn.createStatement();
  localResultSet = this.stmt.executeQuery(paramString);
  }
  catch (SQLException localSQLException) {
  System.out.println(localSQLException.getMessage());
  }
  return localResultSet;
  }

  public int executeUpdate(String paramString) {
  int i = 0;
  try {
  this.conn = DriverManager.getConnection(this.connStr);
  this.stmt = this.conn.createStatement();
  i = this.stmt.executeUpdate(paramString);
  }
  catch (SQLException localSQLException) {
  System.out.println(localSQLException.getMessage());
  }
  return i;
  }

  public void close() {
  try {
  this.stmt.close();
  this.conn.close();
  }
  catch (SQLException localSQLException) {
  System.out.println(localSQLException.getMessage());
  }
  }
}