EasyUI--增删改查

easyui的crud

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。

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

.主要用到的三个布局dialog，datagrid、form

1、通用的JsonBaseDao增删改方法

package com.yuan.util;

import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.ResultSetMetaData;
import java.sql.SQLException;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

public class JsonBaseDao extends BaseDao<Map<String,Object>> {
    public List<Map<String,Object>> executeQuery(String sql, PageBean pageBean) throws SQLException, InstantiationException, IllegalAccessException{
        return super.executeQuery(sql, pageBean, new Callback<Map<String,Object>>() {
            @Override
            public List<Map<String,Object>> foreach(ResultSet rs) throws SQLException, InstantiationException, IllegalAccessException {
                /*
                 * 1、创建一个实体类的实例
                 * 2、给创建的实例属性赋值
                 * 3、将添加完类容的实体类添加到list集合中
                 */
//                list.add(new Book(rs.getInt("bid"), rs.getString("bname"), rs.getFloat("price")));
                List<Map<String,Object>> list = new ArrayList<>();
//                获取数据源
                ResultSetMetaData md = rs.getMetaData();
                int count = md.getColumnCount();
                Map<String,Object> map = null;
                while(rs.next()) {
                    map = new HashMap<>();
                    for (int i = 1; i <= count; i++) {
                        map.put(md.getColumnName(i), rs.getObject(i));
                    }
                    list.add(map);
                }
                return list;
            }
        });
    }
    
    /**
     * 
     * @param sql
     * @param attrs    map中的key
     * @param paMap    jsp向后台传递的参数集合
     * @return
     * @throws SQLException
     * @throws NoSuchFieldException
     * @throws SecurityException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     */
    public int executeUpdate(String sql, String[] attrs, Map<String,String[]> paMap) throws SQLException, NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException {
        Connection con = DBAccess.getConnection();
        PreparedStatement pst = con.prepareStatement(sql);
        for (int i = 0; i < attrs.length; i++) {
            pst.setObject(i+1, JsonUtils.getParamVal(paMap, attrs[i]));
        }
        return pst.executeUpdate();
    }
}

 

2、dao层

package com.yuan.dao;

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

import com.yuan.util.JsonBaseDao;
import com.yuan.util.JsonUtils;
import com.yuan.util.PageBean;
import com.yuan.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);
    }
    
    /**
     * 新增
     * @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 values(?,?,?,?) ";
        System.out.println(sql);
        return super.executeUpdate(sql, new String[] {"SerialNo","uid","uname","upwd"}, 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=?";
        System.out.println(sql);
        return super.executeUpdate(sql, new String[] {"uid","uname","upwd","SerialNo"}, paMap);
    }
    
    /**
     * 删除
     * @param paMap
     * @return
     * @throws NoSuchFieldException
     * @throws SecurityException
     * @throws IllegalArgumentException
     * @throws IllegalAccessException
     * @throws SQLException
     */
    public int remove(Map<String, String[]> paMap) throws NoSuchFieldException, SecurityException, IllegalArgumentException, IllegalAccessException, SQLException {
        String sql = "delete from t_easyui_user_version2 where SerialNo=?";
        System.out.println(sql);
        return super.executeUpdate(sql, new String[] {"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);
    }
    
    
}

 

3、web层

package com.yuan.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 org.apache.catalina.util.RequestUtil;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import com.yuan.dao.UserDao;
import com.yuan.util.PageBean;
import com.yuan.util.ResponseUtil;
import com.***.framework.ActionSupport;

public class UserAction extends ActionSupport {
    
    private UserDao userDao = new UserDao();
    /**
     * 登录成功后跳转index.jsp
     * @param request
     * @param response
     * @return
     */
    public String login(HttpServletRequest request,HttpServletResponse response) {
//        系统中是否有当前登录用户
        Map<String, Object> map = null;
        try {
            map = this.userDao.list(request.getParameterMap(), null).get(0);
        } catch (Exception e) {
            request.setAttribute("msg", "用户不存在");
            return "login";
        }
        try {
            //有就查询用户菜单中间表，获取对应menuid的集合
            if(map!=null&&map.size()>0) {
                //得到[{Menuid:002,...},{Menuid:003,...}]
                //截成002，003
                StringBuilder sb= new StringBuilder();
                List<Map<String, Object>> menuByUid = this.userDao.getMenuByUid(request.getParameterMap(), null);
                for (Map<String, Object> m : menuByUid) {
                    sb.append(","+m.get("menuId"));
                }
                request.setAttribute("menuIds", sb.substring(1));
                 return "index";
            }else {
                //没有就重新跳回登陆界面，并提示用户不存在
                request.setAttribute("msg", "用户不存在");
                 return "login";
            }
        } catch (InstantiationException | IllegalAccessException | SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
             return "login";
        }
        
    }     
    
    /**
     * 数据表格加载方法
     * @param request
     * @param response
     * @return
     */
    public String list(HttpServletRequest request,HttpServletResponse response) {
        ObjectMapper om= new ObjectMapper();
        PageBean pageBean = new PageBean();
        pageBean.setRequest(request);
        try {
            List<Map<String, Object>> list = this.userDao.list(request.getParameterMap(), pageBean);
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("total", pageBean.getTotal());
            map.put("rows", list);
            ResponseUtil.write(response,om.writeValueAsString(map));
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
        
    }     
    
    /**
     * form组建提交方法
     * @param request
     * @param response
     * @return
     */
    public String edit(HttpServletRequest request,HttpServletResponse response) {
        try {
            int code=this.userDao.edit(request.getParameterMap());
            ObjectMapper om = new ObjectMapper();
            Map<String, Object> map = new HashMap<String, Object>();
            map.put("code", code);
            ResponseUtil.write(response, om.writeValueAsString(map));
        } catch (NoSuchFieldException | SecurityException | IllegalArgumentException | IllegalAccessException
                | SQLException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (JsonProcessingException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (Exception e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return null;
        
    }     
    
    /**
     * 新增
     * @param req
     * @param resp
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws SQLException
     * @throws Exception
     */
    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;
    }
    
    /**
     * 删除
     * @param req
     * @param resp
     * @return
     * @throws InstantiationException
     * @throws IllegalAccessException
     * @throws SQLException
     * @throws Exception
     */
    public String remove(HttpServletRequest req,HttpServletResponse resp) throws InstantiationException, IllegalAccessException, SQLException, Exception {
        int code=this.userDao.remove(req.getParameterMap());
        ObjectMapper om = new ObjectMapper();
        Map<String, Object> map = new HashMap<>();
        map.put("code", code);
        ResponseUtil.write(resp, om.writeValueAsString(map));
        return null;
    }
    
    
    
}

4、jsp页面代码

<%@ 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>人员信息维护管理界面</title>
<!-- Ctrl+Shift+r -->
<link rel="stylesheet" type="text/css"
    href="${pageContext.request.contextPath}/static/js/public/easyui5/themes/default/easyui.css">
<link rel="stylesheet" type="text/css"
    href="${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>
    <!-- 对话弹窗 -->
    <div id="dd" class="easyui-dialog" title="编辑窗体"
        style=" 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">
            <input type="hidden" id="method">
            
            <!-- 
   
     easyui自带正则：
     但是如果你想要正则规则在easyui中不存在，easyui中只是定义了一些常见的正则表达式
     那么可以在easyui中自定义正则（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 id="bb">
       <a href="#" class="easyui-linkbutton" onclick="ok()">保存</a>
       <a href="#" class="easyui-linkbutton">关闭</a>
    </div>


</body>
</html>

5、功能完善

userManage.js代码

$(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 : [ {
            //新增按钮
            iconCls : 'icon-add',
            handler : function() {
                alert('新增按钮');
                $('#ff').form('clear');
                $('#dd').dialog('open');
                $('#method').val('add');
                $('#dg').datagrid('reload');

            }
        }, '-', {
            //修改按钮
            iconCls : 'icon-edit',
            handler : function() {
                alert('修改按钮');
                $("#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) {
                    // 回显数据
                    $("#ff").form('load', row);
                }
            }
        }, '-', {
            //删除按钮
            iconCls : 'icon-remove',
            handler : function() {
                alert('移除按钮');
                var row =$('#dg').datagrid('getSelected');//选择你要删除的行
                   if(row){//是否选中
                    $.ajax({  

                    url:'../userAction.action?methodName=remove&&SerialNo='+row.SerialNo  
                       });   
                    alert('删除成功');
                    $('#dg').datagrid('reload');//刷新
                   }else{
                    alert('删除失败');
                   }
            }
        } ]
    });
})
   //提交按钮js代码
function ok(){
//    alert("ok");
    $('#ff').form('submit', {    
        url:'../userAction.action?methodName='+$("#method").val(),    
        success:function(data){
            $("#ff").form('clear');
            $("#dd").dialog('close');
            $("#dg").datagrid('reload');
//            alert(data)   
           }    
    });  

}

6、运行结果

   6.1新增

   6.2修改