我想从jtextfield插入数据库但有一些条件
所以我尝试了这段代码
private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {
try {
Class.forName("com.mysql.jdbc.Driver");
String m = "IMCDietitian";
String unicode= "?useUnicode=yes&characterEncoding=UTF-8";
Connection conn = DriverManager.getConnection("jdbc:mysql://localhost/"+m+""+unicode+"","root","");
System.out.println("connected");
String dept = jComboBox1.getSelectedItem().toString();
if (jTextField6.getText() != null)
{
String pname = jTextField6.getText();
Statement st = conn.createStatement();
ResultSet rs = st.executeQuery("SELECT * FROM '"+dept+"' WHERE pname = '"+pname+"' ");
while (rs.next())
{
if (!rs.getString(8).equals("-") && rs.getString(1).equals(pname) )
{
if (jCheckBox1.isSelected() == true)
{
st.executeQuery("INSERT INTO '"+dept+"' VALUES ('"+jTextField6.getText()+"', '"+jTextField5.getText()+"', '"+jTextField4.getText()+"', 'يوجد', '"+jTextField3.getText()+"', '"+jTextField2.getText()+"', '"+jTextField1.getText()+"', '-'");
}
if (jCheckBox1.isSelected() == false)
{
st.executeQuery("INSERT INTO '"+dept+"' VALUES ('"+jTextField6.getText()+"', '"+jTextField5.getText()+"', '"+jTextField4.getText()+"', 'لا يوجد', '-', '"+jTextField2.getText()+"', '"+jTextField1.getText()+"', '-'");
}
}
if (!rs.getString(1).equals(pname))
{
if (jCheckBox1.isSelected() == true)
{
st.executeQuery("INSERT INTO '"+dept+"' VALUES ('"+jTextField6.getText()+"', '"+jTextField5.getText()+"', '"+jTextField4.getText()+"', 'يوجد', '"+jTextField3.getText()+"', '"+jTextField2.getText()+"', '"+jTextField1.getText()+"', '-'");
}
if (jCheckBox1.isSelected() == false)
{
st.executeQuery("INSERT INTO '"+dept+"' VALUES ('"+jTextField6.getText()+"', '"+jTextField5.getText()+"', '"+jTextField4.getText()+"', 'لا يوجد', '-', '"+jTextField2.getText()+"', '"+jTextField1.getText()+"', '-'");
}
}
}
}
}
catch (Exception e) {
e.printStackTrace();
}
}
但是这个错误是
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ''gc' WHERE pname = 'Ù…Øمد'' at line 1
at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
at com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
at com.mysql.jdbc.Util.getInstance(Util.java:381)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1030)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:1936)
at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2060)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2536)
at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2465)
at com.mysql.jdbc.StatementImpl.executeQuery(StatementImpl.java:1383)
at dietition.EDietListJFrame.jButton1ActionPerformed(EDietListJFrame.java:2351)
at dietition.EDietListJFrame.access$900(EDietListJFrame.java:29)
at dietition.EDietListJFrame$10.actionPerformed(EDietListJFrame.java:963)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:242)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6263)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3267)
at java.awt.Component.processEvent(Component.java:6028)
at java.awt.Container.processEvent(Container.java:2041)
at java.awt.Component.dispatchEventImpl(Component.java:4630)
at java.awt.Container.dispatchEventImpl(Container.java:2099)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4574)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4238)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4168)
at java.awt.Container.dispatchEventImpl(Container.java:2085)
at java.awt.Window.dispatchEventImpl(Window.java:2475)
at java.awt.Component.dispatchEvent(Component.java:4460)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:269)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:184)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:174)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:169)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:161)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:122)
++++是什么意思？ wkey 0x42（66）
任何人都可以提供帮助吗？
答案 0 :(得分：0)
尝试在阿拉伯语文本之前添加N：
SELECT * FROM table WHERE column=N'arabic text'
答案 1 :(得分：0)
首先，代码的结构完全不是人们希望在生产等级代码中看到的。直接从UI组件访问数据库很可能在某个时间点成为问题。
然而，你得到的例外情况非常清楚。 JDBC驱动程序无法解释您的SQL语句。原因是它无法理解插入语句中的阿拉伯字符。
您应该在评论中遵循用户wastl的提示并使用prepared statements。这不仅可以帮助您以SQL injections的形式避免潜在的安全风险，还可以帮助您在语句中使用非ASCII字符编码。
一旦理解并掌握了准备好的语句，您可能希望转移到javax.persistence及其着名的Hibernate实现中可用的更精细的数据模型whit对象到关系映射。
答案 2 :(得分：0)
由于单个逗号[']似乎是语法错误，您可能需要在单个逗号[']之前使用反斜杠[]跳过它，为此您可以使用下面提到的语法：
更新用户设置firstName ='Ù...ØÙ...د\''其中userid ='test';