java 怎样将查询到的数据库的内容显示在Swing界面上？
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.sql.Statement;

public class DB extends Exception{
public static Connection getConn() throws ClassNotFoundException, SQLException{
Class.forName("com.microsoft.sqlserver.jdbc.SQLServerDriver"); 
String url = "jdbc:sqlserver://localhost:1433;DatabaseName=GongGongXuanXiuKe";
String user = "USER3"; 
String password = "123456"; 
Connection conn = DriverManager.getConnection(url,user,password); 
return conn; 
}
public static Statement getStatement() throws ClassNotFoundException,SQLException{
Statement stmt=DB.getConn().createStatement();
  return stmt;
}
// 返回查询的结果集
public static ResultSet getResultSet(String sql) throws ClassNotFoundException,SQLException{
ResultSet rs = DB.getStatement().executeQuery(sql);
return rs;
}
// 根据返回的结果集映射到界面
public static void yingshe(String sql) throws ClassNotFoundException, SQLException{
ResultSet rs = DB.getResultSet(sql);
if(rs.next()){
**********************
***********************
*************************
************************
}
}
public static void close(Connection conn,Statement stmt,ResultSet rs) throws SQLException{ 
if(conn!=null) 
conn.close(); 
if(rs!=null) 
rs.close(); 
if(stmt!=null)
stmt.close(); 
} 
}


不知道星号（*）那里要怎样写，才能把数据库中查询到内容在java编写的界面上的JTextField显示

------解决方案--------------------

Java code

String a = "";
try {
            if (rs.next()) {
                a = rs.getString(1);
            }
        } catch (SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }finally{
            try {
                rs.close();
            } catch (SQLException e) {
                // TODO Auto-generated catch block
                e.printStackTrace();
            }
        }

------解决方案--------------------

先在外面定义一个StringBuild。

然后再循环里StringBuild.append(rs.getObject(1))

最后将字符串显示到JTextField里就行了