java递归菜单树转换成pojo对象

复制代码 代码如下:
  package com.cjonline.foundation.authority.pojo;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import org.apache.log4j.Logger;
import com.cjonline.foundation.util.CheckNullEmpty;

public class ModelList implements java.io.Serializable {
    private static final Logger logger = Logger.getLogger(ModelList.class);
    private static final long serialVersionUID = 6384598893693849820L;
   
    private SysModel model;
   
    private List subList = new ArrayList();
   
    private int flag = 0;
    public SysModel getModel() {
        return model;
    }
    public void setModel(SysModel model) {
        this.model = model;
    }
    public List getSubList() {
        return subList;
    }
    public void setSubList(List subList) {
        this.subList = subList;
    }
    public void setFlag(int flag) {
        this.flag = flag;
    }
    public int getFlag() {
        return flag;
    }
   
    @SuppressWarnings("unchecked")
    public ModelList createTree2(List ms) {
        //
        ModelList node = new ModelList();
        ArrayList fu = new ArrayList();// 用来存储parentId为空的父节点；
        ArrayList childs = new ArrayList();// 用来存储不是系统的模块
        // 将系统和模块菜单分开
        for (Iterator it = ms.iterator(); it.hasNext();) {
            SysModel mode = (SysModel) it.next();
            String parentId = mode.getParentId();
            if (parentId == null || parentId.equals("")) {
                fu.add(mode);
            } else {
                childs.add(mode);
            }
        }
        //由于是多个子系统，首先要找出有多少个子系统
        for (SysModel model : fu) {
            ModelList node1 = new ModelList();
            node1.setFlag(0);
            node1.setModel(model);
            node.subList.add(node1);
            appendChild(node1, childs);
        }
        return node;
    }
   
    public void appendChild(ModelList node, List childs) {
        if (node != null) {
            String systemId = node.getModel().getSystemId();
            String smid = node.getModel().getSysModuleId();
            int flag = node.getFlag();
            if (childs != null && childs.size() > 0) {
                for (SysModel model : childs) {
                    String systemId2 = model.getSystemId();
                    String parentId2 = model.getParentId();
                    if (systemId.equals(systemId2)) {
                        if (parentId2.equals(smid)) {
                            ModelList child = new ModelList();
                            child.setModel(model);
                            child.setFlag(flag + 1);
                            node.getSubList().add(child);
                            appendChild(child, childs);
                        }
                    }
                }
            }
        }
    }
}