我有一个“经理”课程，还有一个框架是“报告”。在框架中我有三个单选按钮，其文本是“1970年之前”，“1970年至2000年之间”，“2000年之后”如果选中其中一个，在这些单选按钮下面的文本字段中，我将显示在我的SQL表中有这种情况的行数。在我的SQL表中，我创建了一个名称，族， fatherName，motherName，dateOfBirth，placeOfBirth，第一列也是自动创建的ID .dateOfBirth列中的文字就像“2009年12月5日”，我只需要它的年份!!!但是当我运行这段代码时，这些堆栈跟踪将显示在控制台中，为什么？请帮帮我。
我的经理类（只是其中的一部分）：
public static int getPercent(String i)throws SQLException{
Statement stmt = conn.createStatement();
List<String> list = null;
if(i.equals("O")){
ResultSet rst = stmt.executeQuery("SELECT dateOfBirth from birthtable");
while(rst.next()){
String s1 = rst.getString(6) ;
if(rst.wasNull()){
s1=null;
}
String s2 = s1.substring(s1.length()-4);
int s3 = Integer.parseInt(s2);
if(list ==null&& s3<1970){
list = new ArrayList<String>();
}
else{
list = new ArrayList<String>();
s2 = null;
}
list.add(s2);
}
}
if(i.equals("N")){
ResultSet rst = stmt.executeQuery("SELECT dateOfBirth from birthtable");
while(rst.next()){
String s1 = rst.getString(6) ;
if(rst.wasNull()){
s1=null;
}
String s2 = s1.substring(s1.length()-4);
int s3 = Integer.parseInt(s2);
if(list ==null&&s3>2000 ){
list = new ArrayList<String>();
}
else{
list = new ArrayList<String>(0);
s2 = null;
}
list.add(s2);
}
}
if(i.equals("H")){
ResultSet rst = stmt.executeQuery("SELECT dateOfBirth from birthtable");
while(rst.next()){
String s1 = rst.getString(6) ;
if(rst.wasNull()){
s1=null;
}
String s2 = s1.substring(s1.length()-4);
int s3 = Integer.parseInt(s2);
if(list ==null&&s3>1970&& s3<2000 ){
list = new ArrayList<String>();
}
else{
list = new ArrayList<String>(0);
s2 = null;
}
list.add(s2);
}
}
return list.size();
}
我的框架（只是其中的一部分）：
private void range1ActionPerformed(java.awt.event.ActionEvent evt) {
int i = 0;
try {
i = Manager.getPercent("O");
} catch (SQLException ex) {
Logger.getLogger(BirthReport.class.getName()).log(Level.SEVERE, null, ex);
}
resulText.setText(i+"");
}
stacktarce：
Dec 17, 2009 7:57:48 AM AdminGUI.BirthReport range1ActionPerformed
SEVERE: null
java.sql.SQLException: Column Index out of range, 6 > 1.
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)
at com.mysql.jdbc.ResultSetImpl.checkColumnBounds(ResultSetImpl.java:792)
at com.mysql.jdbc.ResultSetImpl.getStringInternal(ResultSetImpl.java:5529)
at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5448)
at database.Manager.getPercent(Manager.java:1137)
at AdminGUI.BirthReport.range1ActionPerformed(BirthReport.java:152)
at AdminGUI.BirthReport.access$100(BirthReport.java:23)
at AdminGUI.BirthReport$2.actionPerformed(BirthReport.java:84)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2318)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:387)
at javax.swing.JToggleButton$ToggleButtonModel.setPressed(JToggleButton.java:291)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:236)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:177)
at java.awt.Dialog$1.run(Dialog.java:1039)
at java.awt.Dialog$3.run(Dialog.java:1091)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.Dialog.show(Dialog.java:1089)
at java.awt.Component.show(Component.java:1419)
at java.awt.Component.setVisible(Component.java:1372)
at java.awt.Window.setVisible(Window.java:801)
at java.awt.Dialog.setVisible(Dialog.java:979)
at AdminGUI.BirthFrame.jButton1ActionPerformed(BirthFrame.java:190)
at AdminGUI.BirthFrame.access$300(BirthFrame.java:21)
at AdminGUI.BirthFrame$4.actionPerformed(BirthFrame.java:94)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:1995)
at javax.swing.AbstractButton$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.AWTEventMulticaster.mouseReleased(AWTEventMulticaster.java:272)
at java.awt.Component.processMouseEvent(Component.java:6038)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3265)
at java.awt.Component.processEvent(Component.java:5803)
at java.awt.Container.processEvent(Container.java:2058)
at java.awt.Component.dispatchEventImpl(Component.java:4410)
at java.awt.Container.dispatchEventImpl(Container.java:2116)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4322)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:3986)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:3916)
at java.awt.Container.dispatchEventImpl(Container.java:2102)
at java.awt.Window.dispatchEventImpl(Window.java:2429)
at java.awt.Component.dispatchEvent(Component.java:4240)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:599)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:273)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:183)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:173)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:168)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:121)
答案 0 :(得分：3)
答案是在堆栈跟踪中！查看第1137行，您可以在其中调用getString（6）。现在看一下错误信息：java.sql.SQLException：Column Index超出范围，6＆gt; 1.现在查看您的查询：“从出生地选择dateOfBirth”。
你问（在查询中）1值（dateOfBirth）并且他们试图将它作为返回的第6个值...所以将6更改为.......... 1它应该工作。
你确实需要阅读这些消息 - 他们会告诉你很多。