INSERT INTO在Ucanaccess

Question

我想插入一行到一个表（userGames）给错误，使用Ucanaccess，并且，在执行语句时，我recieving以下错误：

Feb 10, 2015 8:29:02 PM db.Connect update 
SEVERE: null 
net.ucanaccess.jdbc.UcanaccessSQLException: unknown token: 
at net.ucanaccess.jdbc.UcanaccessStatement.execute(UcanaccessStatement.java:145) 
at db.Connect.update(Connect.java:42) 
at db.GameScanner.searchGames(GameScanner.java:99) 
at db.GameScanner.<init>(GameScanner.java:91) 
at db.WelcomeGUI.scanButtonActionPerformed(WelcomeGUI.java:143) 
at db.WelcomeGUI.access$000(WelcomeGUI.java:24) 
at db.WelcomeGUI$1.actionPerformed(WelcomeGUI.java:105) 
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) 
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346) 
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) 
at java.awt.Component.processMouseEvent(Component.java:6527) 
at javax.swing.JComponent.processMouseEvent(JComponent.java:3321) 
at java.awt.Component.processEvent(Component.java:6292) 
at java.awt.Container.processEvent(Container.java:2234) 
at java.awt.Component.dispatchEventImpl(Component.java:4883) 
at java.awt.Container.dispatchEventImpl(Container.java:2292) 
at java.awt.Component.dispatchEvent(Component.java:4705) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4898) 
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4533) 
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4462) 
at java.awt.Container.dispatchEventImpl(Container.java:2278) 
at java.awt.Window.dispatchEventImpl(Window.java:2739) 
at java.awt.Component.dispatchEvent(Component.java:4705) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:746) 
at java.awt.EventQueue.access$400(EventQueue.java:97) 
at java.awt.EventQueue$3.run(EventQueue.java:697) 
at java.awt.EventQueue$3.run(EventQueue.java:691) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86) 
at java.awt.EventQueue$4.run(EventQueue.java:719) 
at java.awt.EventQueue$4.run(EventQueue.java:717) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:716) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82) 
Caused by: java.sql.SQLSyntaxErrorException: unknown token: 
at org.hsqldb.jdbc.Util.sqlException(Unknown Source) 
at org.hsqldb.jdbc.Util.sqlException(Unknown Source) 
at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source) 
at org.hsqldb.jdbc.JDBCStatement.execute(Unknown Source) 
at net.ucanaccess.jdbc.Execute.executeWrapped(Execute.java:62) 
at net.ucanaccess.jdbc.AbstractExecute.executeBase(AbstractExecute.java:138) 
at net.ucanaccess.jdbc.Execute.execute(Execute.java:52) 
at net.ucanaccess.jdbc.UcanaccessStatement.execute(UcanaccessStatement.java:143) 
... 42 more 
Caused by: org.hsqldb.HsqlException: unknown token: 
at org.hsqldb.error.Error.error(Unknown Source) 
at org.hsqldb.error.Error.error(Unknown Source) 
at org.hsqldb.ParserBase.read(Unknown Source) 
at org.hsqldb.ParserDQL.readColumnOrFunctionExpression(Unknown Source) 
at org.hsqldb.ParserDQL.XreadSimpleValueExpressionPrimary(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesValueExpressionPrimary(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesPrimary(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesFactor(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesTerm(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesCommonValueExpression(Unknown Source) 
at org.hsqldb.ParserDQL.XreadValueExpression(Unknown Source) 
at org.hsqldb.ParserDQL.XreadRowElementList(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesValueExpressionPrimary(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesPrimary(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesFactor(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesTerm(Unknown Source) 
at org.hsqldb.ParserDQL.XreadAllTypesCommonValueExpression(Unknown Source) 
at org.hsqldb.ParserDQL.XreadValueExpressionOrNull(Unknown Source) 
at org.hsqldb.ParserDQL.XreadValueExpressionWithContext(Unknown Source) 
at org.hsqldb.ParserDQL.readRow(Unknown Source) 
at org.hsqldb.ParserDQL.XreadContextuallyTypedTable(Unknown Source) 
at org.hsqldb.ParserDML.compileInsertStatement(Unknown Source) 
at org.hsqldb.ParserCommand.compilePart(Unknown Source) 
at org.hsqldb.ParserCommand.compileStatements(Unknown Source) 
at org.hsqldb.Session.executeDirectStatement(Unknown Source) 
at org.hsqldb.Session.execute(Unknown Source) 
... 48 more 

在我的连接类，我有以下：

private Connection conn; 

public Connect(String filepath) { 
    try { 
     Class.forName("net.ucanaccess.jdbc.UcanaccessDriver"); 
     conn = DriverManager.getConnection("jdbc:ucanaccess://" + filepath + ";"); 
     System.out.println("Connection successful"); 

    } catch (Exception e) { 
     System.out.println("ERROR: " + e); 
     e.printStackTrace(); 
    } 
} 

和更新/插入方法：

public boolean update(String sql) { 
    boolean result = false; 
    try { 
     Statement stmt = conn.createStatement(); 
     result = stmt.execute(sql); 
    } catch (SQLException ex) { 
     Logger.getLogger(Connect.class.getName()).log(Level.SEVERE, null, ex); 
    } 
    return result; 
} 

我送下面的SQL语句来更新方法：

"INSERT INTO userGames (userID,gameID) VALUES ("+users[id]+","+games[i]+")" 

我不知道“未知令牌”是什么，或者我应该做些什么来纠正错误的东西。

我已经阅读了Ucanaccess的指南，并且他们和我在做的事情一样，据我所知。 .execute和.executeUpdate都会抛出这个错误，我不知道该怎么做。

感谢所有帮助

Riccorbypro

Answer 1

的错误发生，因为你已经粘贴字符串到您的SQL，在不' '标记括起来，所以SQL有一些话在它的数据库没有按”不知道如何解释。

您应该使用PreparedStatement，并将users[id]和games[i]设置为PreparedStatement中的参数。这在The Java Tutorials

Answer 2

大卫·华莱士说什么充分说明.....

"INSERT INTO userGames (userID,gameID) VALUES ('"+users[id]+'",'"+games[i]+"')"

调试这是只打印您的SQL语句在执行之前，最简单的方法。

但你真的应该使用PreparedStatement