[英]Displaying data from database in JList
I am using following code for retrieving data from database, but i don't know how to show it in JList
我正在使用以下代码从数据库中检索数据,但是我不知道如何在JList
显示它
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");
}
But i want to show column data in JList
. 但是我想在JList
显示列数据。 Can you guys tell me how to do that? 你们能告诉我怎么做吗?
i am using the following code but it is not displaying anything on my frame, can you please tell me where i am wrong? 我正在使用以下代码,但是在框架上没有显示任何内容,您能告诉我哪里错了吗? Thanks 谢谢
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());
}
A JList
might be based on a ListModel
, so you need to make a ListModel
containing your data, and then use this to make your JList
. JList
可能基于ListModel
,因此您需要制作一个包含数据的ListModel
,然后使用它来制作JList
。 I would make a class Stadium
or something, with two String
fields, name
and city
. 我将使用两个String
字段( name
和city
来制作Stadium
或类似的类。
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; }
}
and then you can write something like 然后你可以写一些像
...
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);
Have not tried to compile and test this code, but hopefully the point is helpful! 尚未尝试编译和测试此代码,但希望这一点对您有所帮助!
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