BootStrap Jstree 树形菜单的增删改查的实现源码

1.首先需下载jstree的插件点击打开链接

2.在页面引入插件js文件css文件

<link rel="stylesheet" href="plugins/jstree/themes/classic/style.css">
<script type="text/javascript" src="plugins/jstree/_lib/jquery.js"></script>
<script type="text/javascript"
src="plugins/jstree/_lib/jquery.cookie.js"></script>
<script type="text/javascript"
src="plugins/jstree/_lib/jquery.hotkeys.js"></script>
<script type="text/javascript" src="plugins/jstree/jquery.jstree.js"></script>

3.初始化控件

1）html

<div id="demo2" class="demo" style="height:100px;"></div>

2）js 使用 demo2来初始化树形控件

<script type="text/javascript" class="source below">
$(function() {
$("#demo2").jstree(
{
"json_data" : {
"ajax" : {
"url" : "http://localhost:8080/MemberManager/DepartmentTreeJson",
"data" : function(n) {
// the result is fed to the AJAX request `data` option
return {
"operation" : "get_children",
"id" : n.attr ? n
.attr(
"id")
.replace(
"node_",
"")
: 1
};
}
}
},

"plugins" : [
"themes",
"json_data",

"ui",
"crrm",
"contextmenu",

"search" ],

})

.bind("loaded.jstree",
function(event, data) {
})

.bind(
"select_node.jstree",
function(event, data) {
if (data.rslt.obj
.attr("id") != undefined) {
}
})
.bind(
"remove.jstree",
function(e, data) {
data.rslt.obj.each(function() {
$.ajax({
async : false,
type : 'POST',
url : "http://localhost:8080/MemberManager/CreateNodeForDepartment",
data : {
"operation" : "remove_node",
"id" : this.id.replace("node_", "")
},
success : function(r) {
if (!r.status) {
data.inst.refresh();
}
}
});
});
})
.bind(
"remove.jstree",
function(e, data) {
data.rslt.obj.each(function() {
$.ajax({
async : false,
type : 'POST',
url : "http://localhost:8080/MemberManager/CreateNodeForDepartment",
data : {
"operation" : "remove_node",
"id" : this.id
.replace(
"node_",
"")
},
success : function(
r) {
if (!r.status) {
data.inst.refresh();
}
}
});
});
})
.bind(
"create.jstree",
function(e, data) {
$.post(
"http://localhost:8080/MemberManager/CreateNodeForDepartment",
{
"operation" : "create_node",
"id" : data.rslt.parent
.attr(
"id")
.replace(
"node_",
""),
"position" : data.rslt.position,
"title" : data.rslt.name,
"type" : data.rslt.obj
.attr("rel")
},
function(r) {
if (r.status) {
$(data.rslt.obj).attr("id", "node_" + r.id);
} else {
data.inst.refresh();
$.jstree.rollback(data.rlbk);
}
});
})
.bind(
"rename.jstree",
function(e, data) {
$.post(
"http://localhost:8080/MemberManager/CreateNodeForDepartment",
{
"operation" : "rename_node",
"id" : data.rslt.obj
.attr(
"id")
.replace(
"node_",
""),
"title" : data.rslt.new_name
},
function(r) {
if (!r.status) {
data.inst.refresh();
$.jstree.rollback(data.rlbk);

}
});
})
// 1) the loaded event fires as soon as data is parsed and inserted

// 2) but if you are using the cookie plugin or the core `initially_open` option:
.one("reopen.jstree",
function(event, data) {
})
// 3) but if you are using the cookie plugin or the UI `initially_select` option:
.one("reselect.jstree",
function(event, data) {
});
});
</script>

</pre>4.代码解析<p></p><p><pre name="code" class="java">
import java.util.List;

public class Department {

// 部门id
private String departmentid;
// 部门名称
private String name;
// 父级部门ID
private String parentid;
//同级之间的排序。排序id 小的排前面
private String orders;
//子节点
private List<Department> childNode;

public List<Department> getChildNode() {
return childNode;
}
public void setChildNode(List<Department> childNode) {
this.childNode = childNode;
}

public String getDepartmentid() {
return departmentid;
}
public void setDepartmentid(String departmentid) {
this.departmentid = departmentid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getParentid() {
return parentid;
}
public void setParentid(String parentid) {
this.parentid = parentid;
}
public String getOrders() {
return orders;
}
public void setOrders(String orders) {
this.orders = orders;
}
@Override
public String toString(){
return "[departmentID:"+this.departmentid+
"departmentName:"+this.name+
"parentID:"+this.parentid+"orders:"+this.orders+"]";
}

}

4.代码解析

插件初始化我这里使用了插件的两个参数json_data,以及plugins注意看代码结构



4.1上图两个部分即初始化部分重点解释下plugins这个参数是jstree整合插件的地方theme表示主题，json_data将上文定义的json_data也就

是Ajax从后要获取json数据返回到前台页面。contextmenu，是鼠标右键在树形节点上会弹出增删改查的菜单。

4.2 json数据的格式

先看展示



这是一个可以无限极下分的菜单，我们可以根据上图的目录结构对照下面的json数据结构来看，这样会更清晰。

{"data":"软件及数据","attr":{"id":"e59365b9-7b2a-43a3-b10a-cfe03d5eb004"},
"children":[
{"data":"创新组","attr":{"id":"73919359-2a1b-4ee7-bcc2-56949e8560e8"},
"children":[
{"data":"大数据","attr":{"id":"a7ea6a0f-0b78-4064-803b-f2e0a95d914f"},
"children":[
{"data":"研发","attr":{"id":"fc20e438-e7b9-4cca-be6a-49965daab528"},"children":[]}]}]},
{"data":"项目管理","attr":{"id":"e1bdae71-6cfb-4e8c-ab29-a3eb03b9961d"},"children":[]}
]
},

4.4组装json数据，我使用的是首先查找到所有的父节点即parentid=1的时候，然后递归将所有的子节点加到List<chiledren>对象里面，紧接着再通过循环递归组装无限极菜单json数据下面看数据库数据结构

import java.util.List;

public class Department {

// 部门id
private String departmentid;
// 部门名称
private String name;
// 父级部门ID
private String parentid;
//同级之间的排序。排序id 小的排前面
private String orders;
//子节点
private List<Department> childNode;

public List<Department> getChildNode() {
return childNode;
}
public void setChildNode(List<Department> childNode) {
this.childNode = childNode;
}

public String getDepartmentid() {
return departmentid;
}
public void setDepartmentid(String departmentid) {
this.departmentid = departmentid;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getParentid() {
return parentid;
}
public void setParentid(String parentid) {
this.parentid = parentid;
}
public String getOrders() {
return orders;
}
public void setOrders(String orders) {
this.orders = orders;
}
@Override
public String toString(){
return "[departmentID:"+this.departmentid+
"departmentName:"+this.name+
"parentID:"+this.parentid+"orders:"+this.orders+"]";
}

}

4.5 此处servlet为客户端提供jstree的json_data。就是在初始化控件时候有ajax调用这个servlet获取json数据并返回给json_data

import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.goldwind.www.service.DepartmentService;
import cn.goldwind.www.serviceimpl.DepartmentServiceImpl;

public class DepartmentTreeJson extends HttpServlet {

/**
*
*/
private static final long serialVersionUID = 1L;

public DepartmentTreeJson() {
super();
}

@Override
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
DepartmentService deptService=new DepartmentServiceImpl();
//此处调用创建树节点的方法
StringBuilder json=deptService.createTreeNode();
json.deleteCharAt(json.length()-1);

System.out.println(json);
out.print("["+json+"]");
out.flush();
out.close();
}

@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

doGet(request, response);
}

@Override
public void init() throws ServletException {
// Put your code here
}

}

4.6上面servlet我们看下createTreeNode方法

这里是创建json的核心。

1）首先获取所有的（parent=1）根节点

@Override
    public StringBuilder createTreeNode() {
        //创建部门集合
        List<Department> departments = new ArrayList<Department>();
        //放置所有的根节点部门实体
        departments = queryByParentID("1");
        if (departments != null) {
            
            return json(departments);

        }

        return null;
    }

    public StringBuilder json(List<Department> departments) {
        
        for (int i = 0; i < departments.size(); i++) {
            json.append('{');
            json.append("\"data\":\"").append(departments.get(i).getName())
                    .append("\",");
            json.append("\"attr\":{\"id\":\"").append(departments.get(i).getDepartmentid()).append("\"},");
            List<Department> deptchild = queryByParentID(departments.get(i)
                    .getDepartmentid());
            json.append("\"children\":");
            json.append('[');
            if (deptchild != null) {
                json(deptchild);
                if("1".equals(departments.get(i).getParentid())){
                    json.deleteCharAt(json.length()-1);
                    json.append(']');
                    json.append('}');
                    json.append(',');
                }if(!"1".equals(departments.get(i).getParentid())&&deptchild!=null){
                    json.deleteCharAt(json.length()-1);
                    json.append(']');
                    json.append('}');
                    json.append(',');
                }
                
                
            } else{
                json.append(']');
                json.append('}');
                
                json.append(',');
                
            
            }
            

        }
        
    
        
        return json;
    }

 @Override
    public List<Department> queryByParentID(String parentID) {
        BaseDaoTemplate bd = new BaseDaoTemplate();
        List<Department> departments = new ArrayList<Department>();
        String sql = "select departmentid,name,parentid,orders from department where parentid=? ";
        List<Object> params = new ArrayList<Object>();
        params.add(parentID);
        departments = bd.findAllData(Department.class, sql, params);
        if (departments.size() > 0) {
            return departments;
        }
        return null;
    }

4.7

1.如何创建节点通过右键点击树形菜单弹出增加移除等操作（需在plugins里面加入contextmenu 这个例子就有）

2.绑定jstree的操作，此处以增加节点为例不一一例举



原理;通过点击创建按钮（contextMenu）即选定树节点右键弹出按钮。调用上图的方法，上图方法post方法通过ajax请求后台数据把创建的树节点保存到数据库，

operation：操作的方式（创建，移除，修改。。）；

id:当前节点的id 即你创建下一个节点的parentID。

title:创建的新节点的名称

有这些数据就可以字啊后台获取数据然后增加到数据库。

4.8 创建 servlet处理所有的操作（创建，移除，修改。。）

import java.io.IOException;
import java.io.PrintWriter;
import java.util.UUID;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import cn.goldwind.www.pojo.Department;
import cn.goldwind.www.service.DepartmentService;
import cn.goldwind.www.serviceimpl.DepartmentServiceImpl;

public class CreateNodeForDepartment extends HttpServlet {

private static final long serialVersionUID = 1L;

public CreateNodeForDepartment() {
super();
}

@Override
public void destroy() {
super.destroy(); // Just puts "destroy" string in log
// Put your code here
}

@Override
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
request.setCharacterEncoding("utf-8");
response.setContentType("text/html;charset=UTF-8");
PrintWriter out = response.getWriter();
DepartmentService deptService=new DepartmentServiceImpl();

if("rename_node".equals(request.getParameter("operation"))){
String id=request.getParameter("id");
String title=request.getParameter("title");
Department dept=new Department();
dept.setDepartmentid(id);
deptService.modifyDepartment(dept, title);

}else if("create_node".equals(request.getParameter("operation"))){
String id=request.getParameter("id");
String title=request.getParameter("title");
Department dept=new Department();
dept.setDepartmentid(UUID.randomUUID().toString());
dept.setName(title);
dept.setParentid(id);
deptService.insertDepartment(dept);
}else if("remove_node".equals(request.getParameter("operation"))){
String id=request.getParameter("id");
Department dept=new Department();
dept.setDepartmentid(id);
deptService.deleteDepartment(dept);

}
out.flush();
out.close();
}

/**
* The doPost method of the servlet. <br>
*
* This method is called when a form has its tag value method equals to
* post.
*
* @param request
*            the request send by the client to the server
* @param response
*            the response send by the server to the client
* @throws ServletException
*             if an error occurred
* @throws IOException
*             if an error occurred
*/
@Override
public void doPost(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {

doGet(request, response);
}

/**
* Initialization of the servlet. <br>
*
* @throws ServletException
*             if an error occurs
*/
@Override
public void init() throws ServletException {
// Put your code here
}

}

好了这就完成了，当然这里面的树也是可以自定义图标，自定义按钮等操作，具体可以自己去探究。