如何在jtree中显示数据

Question

我试图从数据库中获取数据并显示在jtree中。 我遇到麻烦ResultSet在我的代码下显示最后一个值数据

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循环中初始化变量。 这将在每个循环中重置先前的数据。您还有几个DefaultMutableTreeNode变量，这些变量将存储相同的rs1.getString("AcCode") 。 我看不出原因。 对代码进行了一些更改，请立即尝试。