如何在jtree中顯示數據

Question

我試圖從數據庫中獲取數據並顯示在jtree中。 我遇到麻煩ResultSet在我的代碼下顯示最后一個值數據

rs1=DB.Select("SELECT AcCode from tblCoa order by AcCode");

while(rs1.next()){
    DefaultMutableTreeNode Catagory=new DefaultMutableTreeNode(rs1.getString("AcCode"));
    DefaultMutableTreeNode Catagories=new DefaultMutableTreeNode(rs1.getString("AcCode"));
    DefaultMutableTreeNode Catagories2=new DefaultMutableTreeNode(rs1.getString("AcCode"));
    DefaultMutableTreeNode Catagories3=new DefaultMutableTreeNode(rs1.getString("AcCode"));
    DefaultMutableTreeNode Catagories4=new DefaultMutableTreeNode(rs1.getString("AcCode"));
    Catagory.add(Catagories);
    Catagories.add(Catagories2);
    Catagories.add(Catagories3);
    Catagories.add(Catagories4);
    DefaultTreeModel dtm=new DefaultTreeModel(Catagory);
    this.jTree1.setModel( dtm);
}

Answer 1

  DefaultMutableTreeNode Catagory = new DefaultMutableTreeNode();


  while(rs1.next()){
       Catagory.add(rs1.getString("AcCode")); 
  }
            DefaultTreeModel dtm=new DefaultTreeModel(Catagory);
            this.jTree1.setModel( dtm);

您可以在while循環中初始化變量。 這將在每個循環中重置先前的數據。您還有幾個DefaultMutableTreeNode變量，這些變量將存儲相同的rs1.getString("AcCode") 。 我看不出原因。 對代碼進行了一些更改，請立即嘗試。