如何在文本区域中显示整个列？

Question

我想在SQL数据库的文本区域中显示整个列，但在TextArea中，它只显示最后一行数据。解决方案是什么？

try
{
    Class.forName("oracle.jdbc.driver.OracleDriver");
                   con=DriverManager.getConnection("jdbc:oracle:oci8:@localhost:1521:XE","tushar","yahoo123");

    st=con.createStatement();

    rs=st.executeQuery("select CUSTOMER_ID from demo_customers" );
        while(rs.next())
        {

        String CUSTOMER_ID  = rs.getString("CUSTOMER_ID");                   

        t2.setText("ID: " + CUSTOMER_ID); //JTextArea t2=new TextArea();

        }

    st.close();
    con.close();
    }
catch(Exception e)
{

     System.out.println(e.getMessage());        
}   

Answer 1

您应该将新文本追加，而不是设置每行的新值。添加换行符也是一个好主意：

while(rs.next()) {
   String CUSTOMER_ID  = rs.getString("CUSTOMER_ID");                   
   t2.append("ID: " + CUSTOMER_ID+"\n");    
}