首页 > 代码库 > Jeecg中的<t:datagrid treegrid="true">实现
Jeecg中的<t:datagrid treegrid="true">实现
Jeecg的代码生成器很不错,但是可能有的时候不是那么符合我们实际项目的功能需求,这里会首先介绍jeecg原生生成的样子,以及根据需求进行的改造。Jeecg中的<t:datagrid>就是将easyui进行封装而成。jsp页面引入:<%@include file="/context/mytags.jsp"%>,在mytags.jsp中<%@ taglib prefix="t" uri="/easyui-tags"%>的这条即为jeecg对easyui的封装。扯得有点远了,回到主题上来。Jeecg中的treegrid的树形结构的实现:
部分需求构造:树形结构图中的是区域划分。区域存于一张表,通过parientid判断其父节点。
需求症状:根据登陆用户所在区域,选择监测区域时为其显示该区域下的子级区域供其选择。并且默认选中原先保存的区域。选中子级区域时不得默认为其选中父级区域。
需求诊断:treegrid为懒加载形式,先加载的是最外层的区域,当点击某区域要为其展开下级时,又会去controller加载出其子级。
需求药方:
1:jsp页面中的<t:datagrid>中的treegrid设置为true。形式为:
<!-- title表格标题,pagination是否分页,由于是树形最好是设置为不显示分页比较符合逻辑的,actionUrl为访问的Controller,checkbox为是否显示复选框
treegrid为是否是树形列表,idField为主键字段,onLoadSuccess为数据加载成调用方法
-->
<t:datagrid name="addList" title="树形列表" pagination="false" actionUrl="regimeController.do?departFunction&monitorId=${monitorId}" checkbox="true" treegrid="true" idField="id" onl oadSuccess="loadSuccess">
2:在RegimeController类里添加方法:departFunction并为其添加注解。函数如下:
@RequestMapping(params = "departFunction") @ResponseBody public List<TreeGrid> departFunction(TSDepart tSDepart,HttpServletRequest request, HttpServletResponse response, TreeGrid treegrid) { String departid = request.getParameter("monitorId");//获取页面参数 即用户区域id StringBuffer sqlList = new StringBuffer(); sqlList.append("SELECT * FROM T_S_DEPART WHERE DELFLAG =0 ");//利用的是原生的depart表,文末我会给出depart类和表形式 if (treegrid.getId() != null) { sqlList.append(" AND parentdepartid = ‘"+treegrid.getId()+"‘");//点击下级时加载下级列表 } else { sqlList.append(" AND id = ‘"+departid+"‘");//查找当前登录用户对应的区域 } List<Record> parList = Db.use("gl").find(sqlList.toString()); //jFinal 数据库走起 List<TSDepart> parDepart = new ArrayList<TSDepart>(); for (int i = 0; i < parList.size(); i++) { TSDepart tagDepart = new TSDepart(); tagDepart.setId(parList.get(i).getStr("id")); tagDepart.setDepartname(parList.get(i).getStr("departname")); tagDepart.setDescription(parList.get(i).getStr("description")); List<TSDepart> sonDepartList = new ArrayList<TSDepart>(); //有下级则继续 否则为null String sql = "SELECT * FROM T_S_DEPART WHERE DELFLAG =0 AND PARENTDEPARTID=‘"+parList.get(i).getStr("id")+"‘"; List<Record> sonList = Db.use("gl").find(sql); //这里的目的是没有下级了则需要显示为文件的形式,而不是文件夹的形式。不理解的话,注释了再看效果你就明白了 if(sonList.size()>0){ tagDepart.setTSDeparts(sonDepartList); }else{ tagDepart.setTSDeparts(null); } TSDepart sonDepart = new TSDepart(); sonDepartList.add(sonDepart); parDepart.add(tagDepart); } //树形列表模型设置类 页面上要对应起来显示的 List<TreeGrid> treeGrids = new ArrayList<TreeGrid>(); TreeGridModel treeGridModel = new TreeGridModel(); treeGridModel.setTextField("departname"); treeGridModel.setParentText("TSPDepart_departname"); treeGridModel.setParentId("TSPDepart_id"); treeGridModel.setSrc("description"); treeGridModel.setIdField("id"); treeGridModel.setChildList("TSDeparts"); treeGrids = systemService.treegrid(parDepart, treeGridModel); return treeGrids; }
3:回到原来那个jsp页面上
<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@include file="/context/mytags.jsp"%> <!DOCTYPE html > <html> <head> <title>树形列表</title> <t:base type="jquery,easyui,tools"></t:base> </head> <body style="overflow-y: hidden" scroll="no"> <input type="hidden" name="departId" value="${departId}" id="departId"> <t:datagrid name="addList" title="树形列表" pagination="false" actionUrl="regimeController.do?departFunction&monitorId=${monitorId}" checkbox="true" treegrid="true" idField="id" onl oadSuccess="loadSuccess"> <t:dgCol title="编号" field="id" treefield="id" hidden="false"></t:dgCol> <t:dgCol title="单位名称" field="departname" treefield="text"></t:dgCol> <t:dgCol title="所属区域" field="description" treefield="src"></t:dgCol> </t:datagrid> </body> <script type="text/javascript"> function loadSuccess(data){ var departId = $(‘#departId‘).val();//默认选中的区域 var monitorId = "${monitorId}";//第一行树形 if(!(departId=="")){ $(‘#addList‘).treegrid(‘collapseAll‘);//合并树形 $(‘#addList‘).treegrid(‘expandAll‘);//展开树形 $(‘#addList‘).treegrid(‘select‘,monitorId);//选中第一行 $("#addList").treegrid("unselectAll");//取消选择 var result=departId.replace(/\s+/g,"");//去空格 var ids=result.split(",");//分割 //$.each(ids,function(index,obj){ // $("#addList").treegrid("select",obj); //}); for(var i = 0;i<ids.length;i++){ $("#addList").treegrid("select",ids[i]);//默认选中 } } } </script>
看到这里也许就要问了:为何有这五行代码
$(‘#addList‘).treegrid(‘collapseAll‘);//合并树形
$(‘#addList‘).treegrid(‘expandAll‘);//展开树形
$(‘#addList‘).treegrid(‘select‘,monitorId);//选中第一行
$("#addList").treegrid("unselectAll");//取消选择
var result=departId.replace(/\s+/g,"");//去空格
问题很多,要不就是前边的序列号全是0,要不就是多行被默认选中时,只能选几条,要不就是无法选中等等问题,其实解决的思路就是模拟人实际操作的时候要点击才会加载,去空格这是个好习惯,未加这行前,就是不能选中,只能选中一条,简直就是莫名其妙的bug啊,想了好几天,边维护其他项目,边想这个,最后在alrt的时候,看着那id发呆,然后发现是页面直接写的值就行,传过来就不行,思前想后啊,才发现是空格的原因啊。哎,还是太年轻啊。、
最后跟上代码,利用的是张大大的类来模拟了一下的功能。写的不是很好呀,小菜一枚望见谅。
1 package org.jeecgframework.web.system.pojo.base; 2 3 import java.util.ArrayList; 4 import java.util.List; 5 6 import javax.persistence.CascadeType; 7 import javax.persistence.Column; 8 import javax.persistence.Entity; 9 import javax.persistence.FetchType; 10 import javax.persistence.JoinColumn; 11 import javax.persistence.ManyToOne; 12 import javax.persistence.OneToMany; 13 import javax.persistence.Table; 14 15 import org.jeecgframework.core.common.entity.IdEntity; 16 17 /** 18 * 部门机构表 19 * @author 张代浩 20 */ 21 @Entity 22 @Table(name = "t_s_depart") 23 public class TSDepart extends IdEntity implements java.io.Serializable { 24 private TSDepart TSPDepart;//上级部门 25 private String departname;//部门名称 26 private String description;//部门描述 27 private String longitude;//经度 28 private String latitude;//纬度 29 private String address;//地址 30 private String code; 31 private Integer dtype; 32 private Integer delflag; 33 private Integer xh; 34 private List<TSDepart> TSDeparts = new ArrayList<TSDepart>();//下属部门 35 36 @ManyToOne(fetch = FetchType.LAZY) 37 @JoinColumn(name = "parentdepartid") 38 public TSDepart getTSPDepart() { 39 return this.TSPDepart; 40 } 41 42 public void setTSPDepart(TSDepart TSPDepart) { 43 this.TSPDepart = TSPDepart; 44 } 45 46 @Column(name = "address", nullable = false, length = 100) 47 public String getAddress() { 48 return this.address; 49 } 50 51 public void setAddress(String address) { 52 this.address = address; 53 } 54 55 @Column(name = "longitude", nullable = false, length = 50) 56 public String getLongitude() { 57 return this.longitude; 58 } 59 60 public void setLongitude(String longitude) { 61 this.longitude = longitude; 62 } 63 64 @Column(name = "latitude", nullable = false, length = 50) 65 public String getLatitude() { 66 return this.latitude; 67 } 68 69 public void setLatitude(String latitude) { 70 this.latitude = latitude; 71 } 72 73 @Column(name = "departname", nullable = false, length = 100) 74 public String getDepartname() { 75 return this.departname; 76 } 77 78 public void setDepartname(String departname) { 79 this.departname = departname; 80 } 81 82 @Column(name = "description", length = 500) 83 public String getDescription() { 84 return this.description; 85 } 86 87 public void setDescription(String description) { 88 this.description = description; 89 } 90 91 @OneToMany(cascade = CascadeType.ALL, fetch = FetchType.LAZY, mappedBy = "TSPDepart") 92 public List<TSDepart> getTSDeparts() { 93 return TSDeparts; 94 } 95 96 public void setTSDeparts(List<TSDepart> tSDeparts) { 97 TSDeparts = tSDeparts; 98 } 99 100 public String getCode() { 101 return code; 102 } 103 104 public void setCode(String code) { 105 this.code = code; 106 } 107 108 public Integer getDtype() { 109 return dtype; 110 } 111 112 public void setDtype(Integer dtype) { 113 this.dtype = dtype; 114 } 115 116 public Integer getDelflag() { 117 return delflag; 118 } 119 120 public void setDelflag(Integer delflag) { 121 this.delflag = delflag; 122 } 123 @Column(name = "xh", nullable = false, length = 50) 124 public Integer getXh() { 125 return xh; 126 } 127 128 public void setXh(Integer xh) { 129 this.xh = xh; 130 } 131 132 133 134 }
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Jeecg中的<t:datagrid treegrid="true">实现