Java Jtree渲染叶子实现可以添加swing组件

效果如上图

---

import java.awt.Color;
import java.awt.Component;
import java.awt.Dimension;

import javax.swing.JPanel;
import javax.swing.JTree;
import javax.swing.plaf.ColorUIResource;
import javax.swing.tree.DefaultMutableTreeNode;
import javax.swing.tree.TreeCellRenderer;

/**
* 树的渲染工具类，实现了将组件挂到树上
* @author 崔耀强 20150507
* @version 1.1
* */

public class TreeComponentRenderer extends JPanel implements TreeCellRenderer {
private static final long serialVersionUID = 1L;
private TreeComponent button;
private DefaultMutableTreeNode root;

/**
 * @param button 需要挂到树上的组件
 * @param root 树的根节点
 */
public TreeComponentRenderer(TreeComponent button,DefaultMutableTreeNode root) {
    setLayout(null);
    //button = new MyComponentUI2();
    this.button=button;
    this.root=root;
    add(button);
}

public Component getTreeCellRendererComponent(JTree tree, Object value,
        boolean isSelected, boolean expanded, boolean leaf, int row,
        boolean hasFocus) {
    DefaultMutableTreeNode root2=(DefaultMutableTreeNode) value;
    if(leaf&&!root2.getParent().equals(root)){
        Equipment o= (Equipment) root2.getUserObject();
        if(o.getEquipmentType().getImgUrl()!=null){
            //UNDO  分组
            if(o.getEquipmentType().getIsGroup()==0){
                button.setPreferredSize(new Dimension(TreeComponent.compUI2Width,TreeComponent.compUI2Hight));
                //CD4组
                button.setLableText(o.getEquipmentType().getName()+"组");
                button.setLableImage(o.getEquipmentType().getImgUrl());
                button.setTextFiledText(o.getEquipmentType().getNum()+"");
                button.setTextFiledBackGround(Color.lightGray);
                button.setJlBackGround(Color.gray);
            }else{

                button.setPreferredSize(new Dimension(TreeComponent.compUI2Width,TreeComponent.compUI2Hight));
                button.setLableText(o.getId()+"");
                button.setLableImage(o.getEquipmentType().getImgUrl());
                button.setTextFiledText(o.getLocation());
                button.setTextFiledBackGround(Color.lightGray);
                button.setJlBackGround(Color.gray);
            }
        }
        return this;
    }   else{
        EquipmentType o= (EquipmentType) root2.getUserObject();
        if(o.getImgUrl()!=null){
            button.setPreferredSize(new Dimension( TreeComponent.compUI2Width,TreeComponent.compUI2Hight));
            button.setLableText(o.getName());
            button.setLableImage(o.getImgUrl());
            button.setTextFiledText(o.getNum()+"");
            button.setTextFiledBackGround(Color.lightGray);
            button.setJlBackGround(Color.gray);
        }
        return this;
    }
}
@Override
public Dimension getPreferredSize() {
    Dimension d_button = button.getPreferredSize();
    return new Dimension(d_button.width ,
            ( d_button.height));
}
@Override
public void doLayout() {
    Dimension d_button = button.getPreferredSize();
    button.setBounds(4, 0,d_button.width, d_button.height );
} 
//设置叶子的背景颜色
public void setBackground(Color color) {
    if (color instanceof ColorUIResource)
        color = null;
    super.setBackground(color);
} 

}