如何在jtree中顯示數據

Question

我想從數據庫中獲取數據並在jtree中顯示。我面臨麻煩的ResultSet顯示下面我的代碼

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); 

的最後一個值data`您啓動while循環中的變量。這將重置每個循環中的先前數據，並且您有多個DefaultMutableTreeNode變量，這些變量將存儲相同的rs1.getString("AcCode")。我沒有看到原因。對代碼進行了一些更改，現在就試用它。