创建表，但它在哪里？

时间：2013-11-24 00:14:18

标签： java sql derby glassfish-4 eclipse-kepler

我设置并连接了一个名为timezonedb的derby数据库 database development view 然后我使用SQL剪贴簿创建表Users。 SQL Scrapbook configuration enter image description here

如您所见，该表已成功创建，添加到剪贴簿并通过剪贴簿查询。问题是，它似乎没有出现在timezonedb中列出的任何模式中。当我尝试运行我的程序时，似乎认为密码是一个模式。下面涉及的Java代码：

    package cis407;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.text.DateFormat;
import java.util.Date;
import java.util.TimeZone;
import java.util.logging.Logger;
import javax.annotation.Resource;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.SessionScoped;
import javax.sql.DataSource;

/**
   This bean formats the local time of day for a given date
   and city.
*/
@ManagedBean
@SessionScoped
public class TimeZoneBean
{
@Resource(name="jdbc/__default")
private DataSource source;

private String userName;
private String password;
private DateFormat timeFormatter;
private String city;
private TimeZone zone;
private String errorMessage;

/**
  Initializes the formatter.
 */
public TimeZoneBean()
{
    timeFormatter = DateFormat.getTimeInstance();
}

public String getPassword()
{
    return password;
}
/**
 * setter for password property
 * there is no getter for the password because there is no reason to ever
 * return the password
 * @param password the password for a given user
 */
public void setPassword(String pass)
{
    password = pass;
}

/**
 * getter for applicable error message
 * @return the error message
 */
public String getErrorMessage()
{
    return errorMessage;
}

/**
 * Setter for username property
 * @param name the user who is logged in
 */
public void setUserName(String name)
{
    userName = name;
}

/**
 * getter for username property
 * @return the user who is logged in
 */
public String getUserName()
{
    return userName;
}

/**
  Setter for city property.
  @param aCity the city for which to report the local time
 */
public void setCity(String aCity)
{      
    city = aCity;
}

/**
  Getter for city property.
  @return the city for which to report the local time
 */
public String getCity()
{
    return city;
}

/**
  Read-only time property.
  @return the formatted time
 */
public String getTime()
{
    if (zone == null) return "not available";
    timeFormatter.setTimeZone(zone);
    Date time = new Date();
    String timeString = timeFormatter.format(time);
    return timeString;
}

/**
  Action for checking a city.
  @return "next" if time zone information is available for the city,
  "error" otherwise
 * @throws SQLException 
 */
public String checkCity() throws SQLException
{
    zone = getTimeZone(city);      
    if (zone == null) return "error";
    addCity();
    return "next";
}

public String newUser() throws SQLException
{
    if (source == null) 
      {
         Logger.getLogger(Logger.GLOBAL_LOGGER_NAME).log(null, "No database connection");;
         return null;
      }
      Connection conn = source.getConnection();
      try
      {
         PreparedStatement stat = conn.prepareStatement(
                 "SELECT UserName "
                 + "FROM Users "
                 + "WHERE UserName=?");
         stat.setString(1, userName);
         ResultSet result = stat.executeQuery();
         if (result.next()) 
         {
            errorMessage = "There is already a user with that name. Please choose another.";
            return "login";
         }
         else
         {
            errorMessage = "";
            stat = conn.prepareStatement(
                    "INSERT INTO Users"
                    + "VALUES (?, ?, ?)");
            stat.setString(1, userName);
            stat.setString(2, password);
            stat.setString(3, null);
            stat.executeUpdate();
            return "index";
         }
      }
      finally
      {
         conn.close();
      }
}

public String logIn() throws SQLException
{
    if (source == null) 
      {
         Logger.getLogger(Logger.GLOBAL_LOGGER_NAME).log(null, "No database connection");;
         return null;
      }
      Connection conn = source.getConnection();
      try
      {
         PreparedStatement stat = conn.prepareStatement(
            "SELECT FavCity FROM Users WHERE UserName=? AND Password=?");
         stat.setString(1, userName);
         stat.setString(2, password);
         ResultSet result = stat.executeQuery();
         if (result.next()) 
         {
            city = result.getString("FavCity");
            errorMessage = "";
            return "next";
         }
         else
         {
            errorMessage = "Wrong username or password";
            return "login";
         }
      }
      finally
      {
         conn.close();
      }
}

private void addCity() throws SQLException
{
    if (source == null) 
      {
         Logger.getLogger(Logger.GLOBAL_LOGGER_NAME).log(null, "No database connection");;
         return;
      }
      Connection conn = source.getConnection();
      try
      {
         PreparedStatement stat = conn.prepareStatement(
            "UPDATE Users "
            + "SET FavCity=? "
            + "WHERE UserName=?");
         stat.setString(1, city);
         stat.setString(2, userName);
         stat.executeUpdate();
      }
      finally
      {
         conn.close();
      }
}
/**
  Looks up the time zone for a city.
  @param aCity the city for which to find the time zone
  @return the time zone or null if no match is found
 */
private static TimeZone getTimeZone(String aCity)
{
    String[] ids = TimeZone.getAvailableIDs();
    for (int i = 0; i < ids.length; i++)
        if (timeZoneIDmatch(ids[i], aCity))
            return TimeZone.getTimeZone(ids[i]);
    return null;
}

/**
  Checks whether a time zone ID matches a city.
  @param id the time zone ID (e.g. "America/Los_Angeles")
  @param aCity the city to match (e.g. "Los Angeles")
  @return true if the ID and city match
 */
private static boolean timeZoneIDmatch(String id, String aCity)
{
    String idCity = id.substring(id.indexOf('/') + 1);
    return idCity.replace('_', ' ').equals(aCity);
}
}

单击webapp中的按钮执行logIn()时（有一些我确定不是问题的xhtml文件，所以我没有包含它们）我收到错误消息说有没有架构＆＃34;密码＆＃34;。我真的很困惑这里发生的事情，因为这不是我以前做过的事情，而是我试图自己解决这个问题。我认为可能找不到桌子。我使用的是GlassFish，而且我在管理控制台中一直在搞乱JDBC设置，但是有很多东西让我很难搞清楚在哪里或者什么问题是。

确切的错误是：

type Exception report
messageInternal Server Error
description The server encountered an internal error that prevented it from fulfilling this request.

exception
javax.servlet.ServletException: java.sql.SQLSyntaxErrorException: Schema 'PASSWORD' does not exist
root cause

javax.faces.el.EvaluationException: java.sql.SQLSyntaxErrorException: Schema 'PASSWORD' does not exist
root cause

java.sql.SQLSyntaxErrorException: Schema 'PASSWORD' does not exist
root cause

org.apache.derby.client.am.SqlException: Schema 'PASSWORD' does not exist

1 个答案:

答案 0 :(得分：0)

以下两种基本技巧可以获取有关您的程序如何访问Derby的更多信息，以及出现的问题：

首先，在启用derby.language.logStatementText参数的情况下运行Derby，并学习读取您的derby.log文件：http://db.apache.org/derby/docs/10.10/ref/rrefproper43517.html

其次，使用以下技术从SQL异常中获取更多信息：http://wiki.apache.org/db-derby/UnwindExceptionChain

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