easyui(前后端分离)

Posted bf6rc9qu

tags:

篇首语:本文由小常识网(cha138.com)小编为大家整理,主要介绍了easyui(前后端分离)相关的知识,希望对你有一定的参考价值。

easyui的crud(dialog,datagrid、form讲解)
1、datagrid布局
2、dialog布局
3、form布局
4、通用的JsonBaseDao增删改方法
5、dao层
6、web层
7、功能完善

陈旧的开发模式
 美工(ui工程师:出一个项目模型)
 java工程师:将原有的html转成jsp,动态展示数据
 缺点:
  客户需要调节前端的展示效果
  解决:由美工去重新排版,重新选色。
Vs
前后端分离
 美工、java工程师都是独立工作的,彼此之间在开发过程中是没有任何交际。
 在开发前约定数据交互的格式。
 java工程师的工作:写方法返回数据如tree_data1.json
 美工:只管展示tree_data1.json
 

datagrid_data1.json

"total":28,"rows":[
    "uid":"FI-SW-01","uname":"Koi","upwd":10.00,"status":"P","listprice":36.50,"attr1":"Large","itemid":"EST-1",
    "uid":"K9-DL-01","uname":"Dalmation","upwd":12.00,"status":"P","listprice":18.50,"attr1":"Spotted Adult Female","itemid":"EST-10",
    "uid":"RP-SN-01","uname":"Rattlesnake","upwd":12.00,"status":"P","listprice":38.50,"attr1":"Venomless","itemid":"EST-11",
    "uid":"RP-SN-01","uname":"Rattlesnake","upwd":12.00,"status":"P","listprice":26.50,"attr1":"Rattleless","itemid":"EST-12",
    "uid":"RP-LI-02","uname":"Iguana","upwd":12.00,"status":"P","listprice":35.50,"attr1":"Green Adult","itemid":"EST-13",
    "uid":"FL-DSH-01","uname":"Manx","upwd":12.00,"status":"P","listprice":158.50,"attr1":"Tailless","itemid":"EST-14",
    "uid":"FL-DSH-01","uname":"Manx","upwd":12.00,"status":"P","listprice":83.50,"attr1":"With tail","itemid":"EST-15",
    "uid":"FL-DLH-02","uname":"Persian","upwd":12.00,"status":"P","listprice":23.50,"attr1":"Adult Female","itemid":"EST-16",
    "uid":"FL-DLH-02","uname":"Persian","upwd":12.00,"status":"P","listprice":89.50,"attr1":"Adult Male","itemid":"EST-17",
    "uid":"AV-CB-01","uname":"Amazon Parrot","upwd":92.00,"status":"P","listprice":63.50,"attr1":"Adult Male","itemid":"EST-18"
]

前端代码的编写:

userManage.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8"
    pageEncoding="UTF-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>人员信息管理界面</title>
<link rel="stylesheet" type="text/css"
    href="$pageContext.request.contextPath /static/js/public/easyui5/themes/black/easyui.css">
<link rel="stylesheet" type="text/css"
    href="$pageContext.request.contextPath /static/js/public/easyui5/themes/icon.css">
<script type="text/javascript"
    src="$pageContext.request.contextPath /static/js/public/easyui5/jquery.min.js"></script>
<script type="text/javascript"
    src="$pageContext.request.contextPath /static/js/public/easyui5/jquery.easyui.min.js"></script>
<script type="text/javascript"
    src="$pageContext.request.contextPath /static/js/userManage.js"></script>

</head>
<body>
<!-- 展示数据 -->
<table id="dg"></table>
<!-- 弹窗 -->
<div id="dd" class="easyui-dialog" title="编辑窗体" style="width:400px;height:200px;"   
        data-options="iconCls:‘icon-save‘,resizable:true,modal:true,closed:true,buttons:‘#bb‘">   
    <!-- 提交的from表单 -->
<form id="ff" method="post">  
<input type="hidden" name="SerialNo">
<!--     easyui自带正则
            但是你如果想要正则规则在easyui中不存在,easyui中只是定义了一些常见的正则
            那么可以在easyui中自定义validType:‘xxx,这个xxx就代表一种正则
                $.extends(validType:xxx
                
                )
-->
        
    <div>   
        <label for="uid">uid:</label>   
        <input class="easyui-validatebox" type="text" name="uid" data-options="required:true" />   
    </div>   
    <div>   
        <label for="uname">uname:</label>   
        <input class="easyui-validatebox" type="text" name="uname" data-options="required:true" />   
    </div> 
    <div>   
        <label for="upwd">upwd:</label>   
        <input class="easyui-validatebox" type="text" name="upwd" data-options="required:true" />   
    </div> 
</form>    
</div>

<!-- </div>
    <div id="tb">
        <a href="#" class="easyui-linkbutton" 
        data-options="iconCls:‘icon-edit‘,plain:true"/a>
        <a href="#" class="easyui-linkbutton" 
        data-options="iconCls:‘icon-help‘,plain:true"/a>
</div> -->
<div id="bb">
<a href="#" class="easyui-linkbutton" onclick="ok()">保存</a>
<a href="#" class="easyui-linkbutton">关闭</a>
</div>


</body>
</html>

userManage.js

$(function()
    $(‘#dg‘).datagrid(    
        url:‘../userAction.action?methodName=list‘,   
        fit:true,
        fitColumns:true,
        pagination:true,
        singleSelect:true,
        columns:[[      
            field:‘uid‘,title:‘ID‘,width:100,    
            field:‘uname‘,title:‘用户名‘,width:100,    
            field:‘upwd‘,title:‘密码‘,width:100,align:‘right‘    
        ]],
        toolbar: [ 
            iconCls: ‘icon-add‘,
            handler: function()
                $(‘#dd‘).dialog(‘open‘)    
            
        ,‘-‘,
            iconCls: ‘icon-edit‘,
            handler: function()
                $(‘#dd‘).dialog(‘open‘)    
                //到datagrid控件中找需要回填的数据(区别于原来从后台查询)
                var row = $(‘#dg‘).datagrid(‘getSelected‘);
                if(row)
                    //get_data.php指的是回填的数据
                    $(‘#ff‘).form(‘load‘,row);
                
            
        ,‘-‘,
            iconCls: ‘icon-remove‘,
            handler: function()alert(‘移除按钮‘)
        ]

    );   
)
function ok()
    alert(‘ok‘);
    $(‘#ff‘).form(‘submit‘,     
        url:‘../userAction.action?methodName=edit‘,    
        success:function(data)   
            $(‘#ff‘).form(‘clear‘)
            $(‘#dd‘).dialog(‘close‘);
            $(‘#dg‘).datagrid(‘reload‘);
            
//            alert(data)   
//            针对于后端返回的结果进行处理
            
    );  

后端代码的编写:

UserDao.java

package com.huang.dao;

import java.sql.SQLException;
import java.util.List;
import java.util.Map;

import com.huang.util.JsonBaseDao;
import com.huang.util.JsonUtils;
import com.huang.util.PageBean;
import com.huang.util.StringUtils;

public class UserDao extends JsonBaseDao 
    
    /**
     * 用户登录或者查询用户分页信息的公共方法
     * @param paMap
     * @param pageBean
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    public List<Map<String, Object>> list(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException
        String sql = "select * from t_easyui_user_version2 where true ";
        String uid = JsonUtils.getParamVal(paMap, "uid");
        String upwd = JsonUtils.getParamVal(paMap, "upwd");
        if(StringUtils.isNotBlank(uid)) 
            sql += " and uid = "+uid;
        
        if(StringUtils.isNotBlank(upwd)) 
            sql += " and upwd = "+upwd;
        
        return super.executeQuery(sql, pageBean);
    
    
    
    /**
     * 添加
     * @param paMap
     * @return
     * @throws NoSuchFieldException
     * @throws SecurityException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    public int add(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException 
        String sql = "insert into t_easyui_user_version2(uid,uname,upwd) values(?,?,?)";
        return super.executeUpdate(sql, new String[] "uid","uname","upwd", paMap);
    
    
    /**
     * 删除
     * @param paMap
     * @return
     * @throws NoSuchFieldException
     * @throws SecurityException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    public int del(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException 
        String sql = "delete from t_easyui_user_version2 where SerialNo=?";
        return super.executeUpdate(sql, new String[] "SerialNo", paMap);
    
    
    
    /**
     * 修改
     * @param paMap
     * @return
     * @throws NoSuchFieldException
     * @throws SecurityException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    public int edit(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException 
        String sql = "update t_easyui_user_version2 set uid=?,uname=?,upwd=? where serialno=?";
        return super.executeUpdate(sql, new String[] "uid","uname","upwd","SerialNo", paMap);
    
    
    
    /**
     * 根据当前用户登录的ID去查询对应的所有菜单
     * @param paMap
     * @param pageBean
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    public List<Map<String, Object>> getMenuByUid(Map<String, String[]> paMap,PageBean pageBean) throws InstantiationException, IllegalAccessException, SQLException
        String sql = "select * from t_easyui_usermenu where true ";
        String uid = JsonUtils.getParamVal(paMap, "uid");
        if(StringUtils.isNotBlank(uid)) 
            sql += " and uid = "+uid;
        
        return super.executeQuery(sql, pageBean);
    

UserAction.java

package com.huang.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.databind.ObjectMapper;
import com.huang.dao.UserDao;
import com.huang.entity.TreeNode;
import com.zking.framework.ActionSupport;
import com.huang.util.PageBean;
import com.huang.util.ResponseUtil;

public class UserAction extends ActionSupport 
    private UserDao userDao = new UserDao();
    
    /**
     * 登录成功后跳转index.jsp
     * @param req
     * @param resp
     * @return
     */
    public String login(HttpServletRequest req,HttpServletResponse resp) 
//        系统中是否有当前用户
        try 
            Map<String, Object> map = null;
            try 
                map = this.userDao.list(req.getParameterMap(), null).get(0);
             catch (Exception e) 
                req.setAttribute("msg", "用户不存在");
                return "login";
            
////        查询用户菜单中间表,获取对应的menuid的集合
            if(map != null && map.size() > 0) 
//                [Menuid:002,...,Menuid:003]
                StringBuilder sb = new StringBuilder();
                List<Map<String, Object>> menuIdArr = this.userDao.getMenuByUid(req.getParameterMap(), null);
                for (Map<String, Object> m : menuIdArr) 
//                    002,003
                    sb.append(","+m.get("menuId"));
                
                req.setAttribute("menuIds", sb.substring(1));
                return "index";
            else 
//        没有
                req.setAttribute("msg", "用户不存在");
                return "login";
            
            
         catch (InstantiationException | IllegalAccessException | SQLException e) 
            e.printStackTrace();
        
        
        
        return null;
    
    
    /**
     * 数据表格data加载方法
     * @param req
     * @param resp
     * @return
     * @throws 
     * @throws 
     * @throws 
     * @throws 
     */
    public String list(HttpServletRequest req,HttpServletResponse resp)   
        ObjectMapper om = new ObjectMapper();
        PageBean pageBean = new PageBean();
        pageBean.setRequest(req);
        try 
            List<Map<String, Object>> list = this.userDao.list(req.getParameterMap(), pageBean);
//            [,,]-->"total":28,"row":[,,]
            Map<String, Object> map = new HashMap<String,Object>();
            map.put("total", pageBean.getTotal());
            map.put("rows", list);
            ResponseUtil.write(resp, om.writeValueAsString(map));
         catch (Exception e) 
            // TODO Auto-generated catch block
            e.printStackTrace();
        
        return null;
    
    
    /**
     * form组件提交方法
     * @param req
     * @param resp
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws SQLException
     * @throws Exception
     */
    public String edit(HttpServletRequest req,HttpServletResponse resp) throws InstantiationException, IllegalAccessException, SQLException, Exception 
        int code=this.userDao.edit(req.getParameterMap());
        ObjectMapper om = new ObjectMapper();
        Map<String, Object> map = new HashMap<>();
        map.put("code", code);
        ResponseUtil.write(resp, om.writeValueAsString(map));
        return null;
    
    
    public String add(HttpServletRequest req,HttpServletResponse resp) throws InstantiationException, IllegalAccessException, SQLException, Exception 
        int code=this.userDao.add(req.getParameterMap());
        ObjectMapper om = new ObjectMapper();
        Map<String, Object> map = new HashMap<>();
        map.put("code", code);
        ResponseUtil.write(resp, om.writeValueAsString(map));
        return null;
    
    
    public String del(HttpServletRequest req,HttpServletResponse resp) throws InstantiationException, IllegalAccessException, SQLException, Exception 
        int code=this.userDao.del(req.getParameterMap());
        ObjectMapper om = new ObjectMapper();
        Map<String, Object> map = new HashMap<>();
        map.put("code", code);
        ResponseUtil.write(resp, om.writeValueAsString(map));
        return null;
    

运行结果:

技术图片

 

以上是关于easyui(前后端分离)的主要内容,如果未能解决你的问题,请参考以下文章

EasyUi前后端分离

前后端分离与不分离的区别总结

怎么理解前后端分离

django前后端分离与不分离概念

什么是前后端分离?为什么分离

WEB开发中前后端分离的好处与区别