Java JDBCSQLite出现奇怪的错误
我不停地遇到这个错误,我不知道如何修复它。下面我添加了代码和堆栈。提前感谢大家的帮助 第一个片段是初始化表的方式,然后是出现错误的地方:(void refresh,这一行Java JDBCSQLite出现奇怪的错误,java,sqlite,jdbc,Java,Sqlite,Jdbc,我不停地遇到这个错误,我不知道如何修复它。下面我添加了代码和堆栈。提前感谢大家的帮助 第一个片段是初始化表的方式,然后是出现错误的地方:(void refresh,这一行listModel.addElement(result.getString(“id_Match”)+“|”+result.getString(“Name”),然后堆栈 String createCity = "CREATE TABLE IF NOT EXISTS City(id_City INTEGER PRIM
listModel.addElement(result.getString(“id_Match”)+“|”+result.getString(“Name”)
,然后堆栈
String createCity = "CREATE TABLE IF NOT EXISTS City(id_City INTEGER PRIMARY KEY AUTOINCREMENT, Name VARCHAR(70) NOT NULL, Country VARCHAR(70) NOT NULL, Continent VARCHAR(70))";
String createCourt = "CREATE TABLE IF NOT EXISTS Court(id_Court INTEGER PRIMARY KEY AUTOINCREMENT, id_City INTEGER REFERENCES City(id_City), Type VARCHAR(70) NOT NULL, Isset VARCHAR(70) NOT NULL)";
String createMatch = "CREATE TABLE IF NOT EXISTS Match(id_Match INTEGER PRIMARY KEY AUTOINCREMENT, id_Court INTEGER REFERENCES Court(id_Court), id_Player INTEGER REFERENCES Player(id_Player), id_Player1 INTEGER REFERENCES Player(id_Player))";
String createPlayer = "CREATE TABLE IF NOT EXISTS Player(id_Player INTEGER PRIMARY KEY AUTOINCREMENT, Name VARCHAR(70),WL FLOAT, Money REAL CHECK ( Money>0))";
public void refresh() {
if(!listModel.isEmpty()) {
listModel.removeAllElements();
}
try {
connection = DriverManager.getConnection(DB_URL);
statement = connection.createStatement();
result = statement.executeQuery("SELECT m.id_Match, p.Name, p1.Name, c.Type FROM Court c, Match m, Player p, Player p1 WHERE m.id_Court=c.id_Court AND p.id_Player=m.id_Player AND p1.id_Player=m.id_Player1");
while(result.next()) {
listModel.addElement(result.getString("id_Match") + " | " + result.getString("Name") + " | " + result.getString("Type"));
}
if(statement!=null) {
statement.close();
}
if(connection!=null) {
connection.close();
}
}
catch(SQLException e) {
System.err.println("Błąd przy odświeżaniu listy");
e.printStackTrace();
}
}
例外情况
Błąd przy odświeżaniu listy
java.sql.SQLException: ambiguous column: 'Name'
at org.sqlite.jdbc3.JDBC3ResultSet.findColumn(JDBC3ResultSet.java:49)
at org.sqlite.jdbc3.JDBC3ResultSet.getString(JDBC3ResultSet.java:448)
at Match.refresh(Match.java:85)
at interf.<init>(interf.java:25)
at mainF.<init>(mainF.java:15)
at mainF$1.run(mainF.java:35)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
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:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at org.GNOME.Accessibility.AtkWrapper$5.dispatchEvent(AtkWrapper.java:700)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Błąd przy odświeżaniu listy
java.sql.SQLException: ambiguous column: 'Name'
at org.sqlite.jdbc3.JDBC3ResultSet.findColumn(JDBC3ResultSet.java:49)
at org.sqlite.jdbc3.JDBC3ResultSet.getString(JDBC3ResultSet.java:448)
at Match.refresh(Match.java:85)
at interf$TabbedPaneListener.stateChanged(interf.java:256)
at javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
at javax.swing.JTabbedPane$ModelListener.stateChanged(JTabbedPane.java:270)
at javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
at javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
at javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
at javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
at javax.swing.JTabbedPane.insertTab(JTabbedPane.java:731)
at javax.swing.JTabbedPane.addTab(JTabbedPane.java:798)
at javax.swing.JTabbedPane.add(JTabbedPane.java:835)
at interf.<init>(interf.java:30)
at mainF.<init>(mainF.java:15)
at mainF$1.run(mainF.java:35)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
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:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at org.GNOME.Accessibility.AtkWrapper$5.dispatchEvent(AtkWrapper.java:700)
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)
Błd przy odświeżaniu listy
java.sql.SQLException:不明确的列:“名称”
位于org.sqlite.jdbc3.JDBC3ResultSet.findColumn(JDBC3ResultSet.java:49)
位于org.sqlite.jdbc3.JDBC3ResultSet.getString(JDBC3ResultSet.java:448)
at Match.refresh(Match.java:85)
国际文传杂志(国际文传杂志java:25)
在mainF(mainF.java:15)
mainF$1.run(mainF.java:35)
在java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)中
位于java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
在java.awt.EventQueue.access$500(EventQueue.java:97)
在java.awt.EventQueue$3.run(EventQueue.java:709)
在java.awt.EventQueue$3.run(EventQueue.java:703)
位于java.security.AccessController.doPrivileged(本机方法)
位于java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
位于java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
位于org.GNOME.Accessibility.AtkWrapper$5.dispatchEvent(AtkWrapper.java:700)
位于java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
在java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)中
位于java.awt.EventDispatchThread.PumpeEventsforHierarchy(EventDispatchThread.java:105)
位于java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
位于java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
在java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
Błd przy odświeżaniu listy
java.sql.SQLException:不明确的列:“名称”
位于org.sqlite.jdbc3.JDBC3ResultSet.findColumn(JDBC3ResultSet.java:49)
位于org.sqlite.jdbc3.JDBC3ResultSet.getString(JDBC3ResultSet.java:448)
at Match.refresh(Match.java:85)
位于interf$TabbedPaneListener.stateChanged(interf.java:256)
位于javax.swing.JTabbedPane.fireStateChanged(JTabbedPane.java:416)
位于javax.swing.JTabbedPane$modelstener.stateChanged(JTabbedPane.java:270)
位于javax.swing.DefaultSingleSelectionModel.fireStateChanged(DefaultSingleSelectionModel.java:132)
位于javax.swing.DefaultSingleSelectionModel.setSelectedIndex(DefaultSingleSelectionModel.java:67)
位于javax.swing.JTabbedPane.setSelectedIndexImpl(JTabbedPane.java:616)
位于javax.swing.JTabbedPane.setSelectedIndex(JTabbedPane.java:591)
位于javax.swing.JTabbedPane.insertTab(JTabbedPane.java:731)
位于javax.swing.JTabbedPane.addTab(JTabbedPane.java:798)
位于javax.swing.JTabbedPane.add(JTabbedPane.java:835)
国际文传杂志(国际文传杂志java:30)
在mainF(mainF.java:15)
mainF$1.run(mainF.java:35)
在java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)中
位于java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
在java.awt.EventQueue.access$500(EventQueue.java:97)
在java.awt.EventQueue$3.run(EventQueue.java:709)
在java.awt.EventQueue$3.run(EventQueue.java:703)
位于java.security.AccessController.doPrivileged(本机方法)
位于java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
位于java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
位于org.GNOME.Accessibility.AtkWrapper$5.dispatchEvent(AtkWrapper.java:700)
位于java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
在java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)中
位于java.awt.EventDispatchThread.PumpeEventsforHierarchy(EventDispatchThread.java:105)
位于java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
位于java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
在java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
选择中的两列被命名为Name
SELECT m.id_Match, p.Name, p1.Name ...
然后你试着用一个
result.getString("Name")
程序应该如何知道是哪一个呢?它是不清楚的——就像错误所说的那样模棱两可
至少为其中一个使用不同的别名
SELECT m.id_Match, p.Name as p_name, p1.Name as p1_name ...
select中的两列被命名为
Name
SELECT m.id_Match, p.Name, p1.Name ...
然后你试着用一个
result.getString("Name")
程序应该如何知道是哪一个呢?它是不清楚的——就像错误所说的那样模棱两可
至少为其中一个使用不同的别名
SELECT m.id_Match, p.Name as p_name, p1.Name as p1_name ...
java.sql.SQLException:不明确的列:“Name”-这一列。可能有错误,因为我在Match中有两个外键,它引用了Player中的一个主键(因为在Match中我需要两个玩家id,因为Match是对两个玩家的)java.sql.SQLException:不明确的列:“Name”-这一列。可能有错误,因为我在Match中有两个外键,它引用了Player中的一个主键(因为在Match中我需要两个玩家id,因为Match是对两个玩家的)