[英]Displaying data from database in JList
我正在使用以下代碼從數據庫中檢索數據,但是我不知道如何在JList
顯示它
Class.forName("oracle.jdbc.driver.OracleDriver");
Statement stmt = null;
ResultSet rs;
Connection conn=DriverManager.getConnection("jdbc:mysql://127.0.0.1/SPL","root","PWD");
stmt=(Statement) conn.createStatement();
rs=stmt.executeQuery(query);
while (rs.next())
{
String stadium = rs.getString("Stadium");
String city = rs.getString("City");
}
但是我想在JList
顯示列數據。 你們能告訴我怎么做嗎?
我正在使用以下代碼,但是在框架上沒有顯示任何內容,您能告訴我哪里錯了嗎? 謝謝
String query="SELECT * FROM Location";
DefaultListModel model=new DefaultListModel();
DefaultListModel model1=new DefaultListModel();
try
{ Class.forName("oracle.jdbc.driver.OracleDriver");
Statement stmt = null;
ResultSet rs;
Connection conn=DriverManager.getConnection("jdbc:mysql://127.0.0.1/SPL","root","PWD");
stmt=(Statement) conn.createStatement();
rs=stmt.executeQuery(query);
while (rs.next())
{
String stadium = rs.getString("Stadium");
String city = rs.getString("City");
model.addElement(stadium);
model1.addElement(city);
}
JList list=new JList(model);
JList list1=new JList(model1);
f8.add(jpa1); //f8=frame name,jpa1=panel name
jpa1.add(list); list.setSelectionMode(ListSelectionModel.SINGLE_INTERVAL_SELECTION); list.setLayoutOrientation(JList.HORIZONTAL_WRAP);
list.setVisibleRowCount(1);
JScrollPane listScroller = new JScrollPane(list);
}
catch(SQLException e)
{
System.out.println("Message : " + e.getMessage());
}
JList
可能基於ListModel
,因此您需要制作一個包含數據的ListModel
,然后使用它來制作JList
。 我將使用兩個String
字段( name
和city
來制作Stadium
或類似的類。
public class Stadium {
private String name;
private String city;
public Stadium(String name, String city){...}
//toString()-method to make it display in a meaningful way in the JList
public String toString(){ return name + " - " + city; }
}
然后你可以寫一些像
...
DefaultListModel listModel = new DefaultListModel();
while (rs.next()) {
String name = rs.getString("Stadium");
String city = rs.getString("City");
Stadium stadium = new Stadium(name, city)
listModel.addElement(stadium);
}
JList list = new JList(listModel);
尚未嘗試編譯和測試此代碼,但希望這一點對您有所幫助!
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