ztree最简单的后台传前台例子

package com.tree.action; import java.io.IOException; import java.util.ArrayList; import java.util.List; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import com.alibaba.fastjson.JSON; import com.tree.entity.Menu; public class treeJson extends HttpServlet { @Override protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { Menu m3 = new Menu(); m3.setId("13"); m3.setPId("12"); m3.setName("third"); Menu m2 = new Menu(); m2.setId("12"); m2.setPId("11"); m2.setName("second"); m2.getMenus().add(m3); Menu m1 = new Menu(); m1.setId("1"); m1.setPId("0"); m1.setName("first"); m1.getMenus().add(m2); Menu m6 = new Menu(); m6.setId("23"); m6.setPId("22"); m6.setName("third"); Menu m5 = new Menu(); m5.setId("22"); m5.setPId("21"); m5.setName("second"); m5.getMenus().add(m6); Menu m4 = new Menu(); m4.setId("21"); m4.setPId("0"); m4.setName("first"); m4.getMenus().add(m5); List<Menu> m = new ArrayList<Menu>(); m.add(m1); m.add(m4); String jsonString = JSON.toJSONString(m); System.out.println(jsonString.replaceAll("menus", "children"));//zTree里面节点一定要用nodes所以要将menus替换为nodes，也可以该前面Menu.java 为 Nodes.java resp.getWriter().print(jsonString.replaceAll("menus", "children")); } @Override protected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException { doGet(req,resp); } }