首先认识layui
layui（谐音：类UI) 是一款采用自身模块规范编写的前端 UI 框架，遵循原生 HTML/CSS/JS 的书写与组织形式，门槛极低，拿来即用。其外在极简，却又不失饱满的内在，体积轻盈，组件丰盈，从核心代码到 API 的每一处细节都经过精心雕琢，非常适合界面的快速开发。
（推荐教程：layui）
下载之后导进css、js样式
简单的效果图
接下来直接上代码
dao方法
package com.chen.dao;
import java.sql.SQLException;
import java.util.List;
import java.util.Map;
import com.chen.util.JsonBaseDao;
import com.chen.util.JsonUtils;
import com.chen.util.PageBean;
import com.chen.util.StringUtils;
public class BooktypeDao extends JsonBaseDao{
/**
* 书籍类别查询
* @param paMap
* @param pageBean
* @return
* @throws SQLException
* @throws IllegalAccessException
* @throws InstantiationException
*/
public List> list(Map paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException{
String sql=" select * from t_type where true";
String tid=JsonUtils.getParamVal(paMap, "tid");
String tname=JsonUtils.getParamVal(paMap, "tname");
if(StringUtils.isNotBlank(tid)) {
sql+=" and tid ="+tid+" ";
}
if(StringUtils.isNotBlank(tname)) {
sql+=" and tname like '%"+tname+"%'";
}
sql += " order by tid desc ";
return executeQuery(sql, pageBean);
}
/**
* 增加
* @param paMap
* @return
* @throws NoSuchFieldException
* @throws SecurityException
* @throws IllegalArgumentException
* @throws IllegalAccessException
* @throws SQLException
*/
public int addType(Map paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException {
String sql="insert into t_type(tname) values(?) ";
return super.executeUpdate(sql, new String[] {"tname"}, paMap);
}
/**
* 修改
* @param paMap
* @return
* @throws NoSuchFieldException
* @throws SecurityException
* @throws IllegalArgumentException
* @throws IllegalAccessException
* @throws SQLException
*/
public int editType(Map paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException {
String sql="update t_type set tname=? where tid=?";
return super.executeUpdate(sql, new String[] {"tname","tid"}, paMap);
}
/**
* 删除
* @param paMap
* @return
* @throws NoSuchFieldException
* @throws SecurityException
* @throws IllegalArgumentException
* @throws IllegalAccessException
* @throws SQLException
*/
public int removeType(Map paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException {
String sql="delete from t_type where tid=? ";
return super.executeUpdate(sql, new String[] {"tid"}, paMap);
}
} entity一个树形的实体类
package com.chen.entity;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class TreeNode {
private String id;
private String name;
private Map attributes = new HashMap<>();
private List children = new ArrayList<>();
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public Map getAttributes() {
return attributes;
}
public void setAttributes(Map attributes) {
this.attributes = attributes;
}
public List getChildren() {
return children;
}
public void setChildren(List children) {
this.children = children;
}
public TreeNode(String id, String text, Map attributes, List children) {
super();
this.id = id;
this.name = name;
this.attributes = attributes;
this.children = children;
}
public TreeNode() {
super();
}
@Override
public String toString() {
return "TreeNode [id=" + id + ", name=" + name + ", attributes=" + attributes + ", children=" + children + "]";
}
} action子控制器
package com.liuting.web;
import java.sql.SQLException;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.chen.dao.BooktypeDao;
import com.chen.framework.ActionSupport;
import com.chen.util.PageBean;
import com.chen.util.ResponseUtil;
public class BooktypeAction extends ActionSupport {
private BooktypeDao booktypeDao=new BooktypeDao();
/**
* 查询书籍类别
* @param req
* @param resp
* @return
* @throws Exception
*/
public String list(HttpServletRequest req,HttpServletResponse resp) throws Exception {
try {
PageBean pageBean=new PageBean();
pageBean.setRequest(req);
List> list = this.booktypeDao.list(req.getParameterMap(), pageBean);
ObjectMapper om =new ObjectMapper();
Map map=new HashMap<>();
map.put("code", 0);
map.put("count", pageBean.getTotal());
map.put("data", list);
ResponseUtil.write(resp, om.writeValueAsString(map));
} catch (InstantiationException e) {
e.printStackTrace();
}
return null;
}
/**
* 增加
* @param req
* @param resp
* @return
*/
public String addBookType(HttpServletRequest req,HttpServletResponse resp) {
try {
List> list = this.booktypeDao.list(req.getParameterMap(), null);
int val = 0;
//如果集合不为空 或者长度等于 0 就把它增加进去
if(list==null || list.size() == 0) {
val = this.booktypeDao.addType(req.getParameterMap());
}
else {
val= 2;
}
ResponseUtil.write(resp, val);
} catch (Exception e) {
e.printStackTrace();
}
return null;
}
/**
* 删除书本类别
* @throws Exception
* @throws JsonProcessingException
*
*/
public String deleteBookType(HttpServletRequest req,HttpServletResponse resp) throws JsonProcessingException, Exception {
try {
int deleteBookType=this.booktypeDao.removeType(req.getParameterMap());
ObjectMapper om=new ObjectMapper();
ResponseUtil.write(resp, om.writeValueAsString(deleteBookType));
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
return null;
}
/**
* 修改书籍类别
* @param req
* @param resp
* @return
* @throws JsonProcessingException
* @throws Exception
*/
public String updateBookType(HttpServletRequest req,HttpServletResponse resp) throws JsonProcessingException, Exception {
try {
int updateBookType=this.booktypeDao.editType(req.getParameterMap());
ObjectMapper om=new ObjectMapper();
ResponseUtil.write(resp, om.writeValueAsString(updateBookType));
} catch (NoSuchFieldException e) {
e.printStackTrace();
}
return null;
}
/**
* 下拉框
*/
public String listSelect(HttpServletRequest req,HttpServletResponse resp) throws Exception {
try {
PageBean pageBean=new PageBean();
pageBean.setRequest(req);
List> list = this.booktypeDao.list(req.getParameterMap(), pageBean);
ObjectMapper om =new ObjectMapper();
ResponseUtil.write(resp, om.writeValueAsString(list));
} catch (InstantiationException e) {
e.printStackTrace();
}
return null;
}
} mvc.xml的配置路径
web.xml的配置路径
Mvc_Layui encodingFiter com.chen.util.EncodingFiter encodingFiter /* dispatherServlet com.chen.framework.DispatherServlet xmlPath /mvc.xml dispatherServlet *.action
jsp页面
<%@ page language="java" contentType="text/html; charset=UTF-8"
pageEncoding="UTF-8"%>
<%@ include file="/jsp/common/head.jsp" %>
Insert title here
本次所用到的jar包
index.js
$(function () {
$.ajax({
type: "post",
url: "menuAction.action?methodName=treeMenu",
dataType: "json",
/*data: {// 传给servlet的数据,
role_id: MenuHid,
right_code: "-1",
d: new Date()
},*/
success: function (data) {
console.info(data);
layui.tree({
elem: '#demo',// 传入元素选择器
nodes: data,
// spread:true,
click: function (node) {// 点击tree菜单项的时候
var element = layui.element;
var exist = $("li[lay-id='" + node.id + "']").length;//判断是不是用重复的选项卡
if (exist > 0) {
element.tabChange('tabs', node.id);// 切换到已有的选项卡
} else {
if (node.attributes.menuURL != null && node.attributes.menuURL != "") {// 判断是否需要新增选项卡
element.tabAdd(
'tabs',
{
title: node.name,
content: ''// 支持传入html
,
// width="99%" height="99%"
id: node.id
});
element.tabChange('tabs', node.id);
}
}
}
});
}
});
})完成！
