java - 如何在查询中使用 UTF-8 字符

Question

我正在尝试从访问数据库中获取数据，但由于列名包含诸如“°”和“é”之类的 utf-8 字符，例如当我尝试此查询时，我不能：

SELECT Code_UE, Moy_UE, credit_obtenu FROM Resultats_UE WHERE N°Ins=10025

由于 N°Ins 中的°，它不起作用

这是java代码：

    private static final String USER = "admin";
    private static final String PASSWORD = "password";
    private static final String DRIVER = "net.ucanaccess.jdbc.UcanaccessDriver";
    private static final String URL = "jdbc:ucanaccess://[path to file];}";
    Connection connection = null;
    Statement statement = null;
    ResultSet Student_tb = null;

    //Called via UI
    public void OpenBActionPerformed(java.awt.event.ActionEvent evt){
        try {
            connection = DriverManager.getConnection(URL, USER, PASSWORD);
            statement = connection.createStatement();

            Student_tb = statement.executeQuery("select Code_UE, Moy_UE, credit_obtenu FROM Resultats_UE from Resultats_UE WHERE N°Ins='2'");
            while(Student_tb.next()){
                 System.out.println(Student_tb.getString(1));
            }
        } catch (SQLException ex) {
            ex.printStackTrace();
        }
    }

    public static void main(String args[]) {
        try {
            Class.forName(DRIVER);
        } catch (ClassNotFoundException ex) {
            ex.printStackTrace();
        }

    }

我的数据库是用密码保护的

    SELECT Code_UE, Moy_UE, credit_obtenu FROM Resultats_UE

然后将 N°Ins 与结果进行比较，但这需要更多时间

这是错误消息：

net.ucanaccess.jdbc.UcanaccessSQLException: UCAExc:::4.0.4 unknown token: 
    at net.ucanaccess.jdbc.UcanaccessStatement.executeQuery(UcanaccessStatement.java:218)
    at annexe.MainUI.OpenBActionPerformed(MainUI.java:95)
    at annexe.MainUI.access$000(MainUI.java:16)
    at annexe.MainUI$1.actionPerformed(MainUI.java:60)
    at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
    at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
    at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
    at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
    at javax.swing.AbstractButton.doClick(AbstractButton.java:376)
    at javax.swing.plaf.basic.BasicMenuItemUI.doClick(BasicMenuItemUI.java:842)
    at javax.swing.plaf.basic.BasicMenuItemUI$Handler.mouseReleased(BasicMenuItemUI.java:886)
    at java.awt.Component.processMouseEvent(Component.java:6539)
    at javax.swing.JComponent.processMouseEvent(JComponent.java:3324)
    at java.awt.Component.processEvent(Component.java:6304)
    at java.awt.Container.processEvent(Container.java:2239)
    at java.awt.Component.dispatchEventImpl(Component.java:4889)
    at java.awt.Container.dispatchEventImpl(Container.java:2297)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
    at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
    at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
    at java.awt.Container.dispatchEventImpl(Container.java:2283)
    at java.awt.Window.dispatchEventImpl(Window.java:2746)
    at java.awt.Component.dispatchEvent(Component.java:4711)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:760)
    at java.awt.EventQueue.access$500(EventQueue.java:97)
    at java.awt.EventQueue$3.run(EventQueue.java:709)
    at java.awt.EventQueue$3.run(EventQueue.java:703)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
    at java.awt.EventQueue$4.run(EventQueue.java:733)
    at java.awt.EventQueue$4.run(EventQueue.java:731)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:730)
    at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
    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.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCUtil.sqlException(Unknown Source)
    at org.hsqldb.jdbc.JDBCStatement.fetchResult(Unknown Source)
    at org.hsqldb.jdbc.JDBCStatement.executeQuery(Unknown Source)
    at net.ucanaccess.jdbc.UcanaccessStatement.executeQuery(UcanaccessStatement.java:216)
    ... 41 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.XreadBooleanPrimaryOrNull(Unknown Source)
    at org.hsqldb.ParserDQL.XreadBooleanTestOrNull(Unknown Source)
    at org.hsqldb.ParserDQL.XreadBooleanFactorOrNull(Unknown Source)
    at org.hsqldb.ParserDQL.XreadBooleanTermOrNull(Unknown Source)
    at org.hsqldb.ParserDQL.XreadBooleanValueExpression(Unknown Source)
    at org.hsqldb.ParserDQL.readWhereGroupHaving(Unknown Source)
    at org.hsqldb.ParserDQL.XreadTableExpression(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQuerySpecification(Unknown Source)
    at org.hsqldb.ParserDQL.XreadSimpleTable(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryPrimary(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryTerm(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryExpressionBody(Unknown Source)
    at org.hsqldb.ParserDQL.XreadQueryExpression(Unknown Source)
    at org.hsqldb.ParserDQL.compileCursorSpecification(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)
    ... 44 more

标签： javaucanaccess