ReactJs实现树形结构的数据显示的组件的示例_JavaScript

本文介绍了reactjs实现树形结构的数据显示的组件的示例，分享给大家，具体如下：

1、该组件树形显示数据

2、组件中数据的请求方式为fetch方式

3、点击对应的数据前面的小三角，fetch请求改数据下对应的子数据，并展开该节点。

4、将该组件的js、less文件放到kpitree目录下，在kpitree目录下创建images目录将组件需要的图片放入给目录，在kpitree目录下创建json文件夹将该组件需要的json文件放入改文件夹中，组件便可正常运行。

kpitree.js文件

 /** 
 * created by administrator on 2017/3/20 0020. 
 */ 
import react,{component} from "react" 
import "./kpitree.less"; 
export default class kpitree extends component{ 
  constructor(props){ 
    super(props); 
    this.state={ 
    } 
    this._handleselect=this._handleselect.bind(this); 
    this._handlesearch=this._handlesearch.bind(this); 
    this._handlereturn=this._handlereturn.bind(this); 
  } 
  _handlesearch=()=>{ 
    debugger 
    var _self=this; 
    var _inputvalue=this.refs.ksearchinput.value;//搜索框输入的关键字 
    var _main=this.refs.kpitree; 
    _main.innerhtml=""; 
    var searchlisturl = '../src/kpitree/json/searchlistdata.json'; 
    fetch(searchlisturl,{ 
      credentials:'same-origin', 
      async:false, 
      //method: 'post', 
      method: 'get', 
      mode:'cors',//跨域请求 
      headers: { 
        "content-type": "application/x-www-form-urlencoded", 
        "user-agent": " mozilla/5.0 (windows nt 10.0; wow64) applewebkit/537.36 (khtml, like gecko) chrome/50.0.2661.102 safari/537.36" 
      }, 
    }) 
      .then(function(res) { 
        console.log("response succeeded?", json.stringify(res.ok)); 
        return res.json(); 
      }) 
 
      .then(function(data) { 
        debugger 
        _self._rendertreenode(_main,data,0); 
      }) 
      .catch(function(e) { 
        console.log("fetch fail",e.tostring()); 
      }); 
  } 
  _handlereturn=()=>{ 
    this.refs.ksearchinput.value="";//清空搜索输入框 
    var _main=this.refs.kpitree; 
    _main.innerhtml=""; 
    this._fetchtreenodedata("",_main,0); 
  } 
  _handleselect=()=>{ 
    debugger; 
    var _select=[]; 
    $(this.refs.kpitree).find("input:checkbox").each(function() {//$('#kpitree input:checkbox') 
      if ($(this)[0].pid!=undefined&&$(this)[0].checked ==true) { 
        var _selected_kpi={}; 
        _selected_kpi.kid=$(this)[0].parentnode.id.substring(4); 
        _selected_kpi.kname=$(this)[0].parentnode.children[1].innerhtml 
        _selected_kpi.pid=$(this)[0].parentnode.pid.substring(4); 
        _select.push(_selected_kpi); 
      } 
    }); 
    this.props.callbackparent(_select); 
  } 
  componentdidmount=()=>{ 
    var _main=this.refs.kpitree; 
    this._fetchtreenodedata("",_main,0); 
  } 
  _selectallcheckbox=(parentnodeid,event)=>{ 
    var _items=$("#" + parentnodeid+" input") 
    for(var i=0;i<_items.length;i++){ 
      if (_items[i].pid!=undefined&&_items[i].pid==parentnodeid){ 
        _items[i].checked=event.currenttarget.checked; 
      } 
    } 
  } 
  _rendertreenode=(nodeobj,treedata,paddingleft)=>{ 
    var _self=this; 
    var hasallselectbox=false; 
    if(treedata.length>0){ 
      for(var i=0;i<treedata.length;i++){ 
        if(treedata[i].haschild=="0"){ 
          hasallselectbox=true 
        } 
      } 
      var _node=treedata.map((data,index)=>{ 
        var _kname=data.kname; 
        var _div=document.createelement("div"); 
        _div.pid="node"+data.pid; 
        _div.id="node"+data.kid; 
        _div.style.paddingleft=paddingleft+"px"; 
        var _img=document.createelement("img"); 
        _img.src="/src/kpitree/images/hide.png"; 
        _img.classname="knode-hide-show-icon"; 
        _img.onclick=_self._handleclick.bind(this,data.kid); 
        var _checkbox=document.createelement("input"); 
        _checkbox.type="checkbox" 
        _checkbox.pid="node"+data.pid; 
        var _span=document.createelement("span"); 
        _span.innerhtml=_kname; 
        var allcheckboxdiv=null; 
        if(data.pid!="-1"&&index==0&&hasallselectbox==true){ 
          allcheckboxdiv=document.createelement("div"); 
          allcheckboxdiv.pid="node"+data.pid; 
          allcheckboxdiv.style.paddingleft=paddingleft+"px"; 
          var _allcheckbox=document.createelement("input"); 
          _allcheckbox.type="checkbox"; 
          _allcheckbox.onchange=_self._selectallcheckbox.bind(this,nodeobj.id); 
          var _allcheckboxlabel=document.createelement("span"); 
          _allcheckboxlabel.innerhtml="全选"; 
          allcheckboxdiv.appendchild(_allcheckbox); 
          allcheckboxdiv.appendchild(_allcheckboxlabel); 
        } 
        if(data.haschild=="1"){ 
          _div.appendchild(_img); 
        } 
        else if(data.haschild=="0"){ 
          _div.appendchild(_checkbox); 
        } 
        _div.appendchild(_span); 
        if(allcheckboxdiv){ 
          nodeobj.appendchild(allcheckboxdiv) 
        } 
        nodeobj.appendchild(_div); 
      }) 
 
    } 
  } 
  _fetchtreenodedata=(nodeid,nodeobj,paddingleft)=>{ 
    debugger; 
    var _self=this; 
    var treelisturl = '../src/kpitree/json/treelistdata'+nodeid+'.json'; 
    fetch(treelisturl,{ 
      credentials:'same-origin', 
      async:false, 
      //method: 'post', 
      method: 'get', 
      mode:'cors',//跨域请求 
      headers: { 
        "content-type": "application/x-www-form-urlencoded", 
        "user-agent": " mozilla/5.0 (windows nt 10.0; wow64) applewebkit/537.36 (khtml, like gecko) chrome/50.0.2661.102 safari/537.36" 
      }, 
    }) 
      .then(function(res) { 
        console.log("response succeeded?", json.stringify(res.ok)); 
        return res.json(); 
      }) 
 
      .then(function(data) { 
        debugger 
        _self._rendertreenode(nodeobj,data,paddingleft); 
      }) 
      .catch(function(e) { 
        console.log("fetch fail",e.tostring()); 
      }); 
 
  } 
  _handleclick=(nodeid,event)=>{ 
    debugger; 
    var _clickimg=event.currenttarget 
    var currentnode=event.currenttarget.parentnode; 
    if(_clickimg.src.indexof("hide")!=-1){ 
      _clickimg.src="/src/kpitree/images/show.png"; 
      if(currentnode.childnodes[3]!=null&¤tnode.childnodes[3]!=undefined){ 
        this._showorhidenode(currentnode,1); 
      } 
      else { 
        this._fetchtreenodedata(nodeid,currentnode,20); 
      } 
    } 
    else if(_clickimg.src.indexof("show")!=-1){ 
      _clickimg.src="/src/kpitree/images/hide.png"; 
      this._showorhidenode(currentnode,0); 
    } 
  } 
  _showorhidenode=(pnode,isshow)=>{ 
    var _sub_nodes=pnode.childnodes; 
    for(var i=0;i<_sub_nodes.length;i++){ 
      if(_sub_nodes[i].pid==pnode.id){ 
        if(isshow==1){ 
          _sub_nodes[i].style.display="block"; 
        } 
        else if(isshow==0){ 
          _sub_nodes[i].style.display="none"; 
        } 
      } 
    } 
  } 
  render=()=> { 
    var tabid=this.props.tabid; 
    var _kpitreepanelheight=tabid=="tab01"?"kpitree_panel_height_01":"kpitree_panel_height_02"; 
    var _bottomcontentheight=tabid=="tab01"?"kbottom-content_height_01":"kbottom-content_height_02"; 
    return ( 
      <div classname={"kpitree_panel "+_kpitreepanelheight}> 
        <div classname="ksearch-div"> 
          <input type="text" classname="ksearch-input" ref="ksearchinput" placeholder=" 请输入搜索关键字"/> 
          <img classname="ksearch-icon" src="/src/kpitree/images/search-icon.png" onclick={this._handlesearch}/> 
          <div classname="kreturn-button" onclick={this._handlereturn}> 
            <span>返回</span> 
          </div> 
          <div classname="kselecte-button" onclick={this._handleselect}> 
            <span>指标选择</span> 
          </div> 
        </div> 
        <div classname={"kbottom-content "+_bottomcontentheight} ref="kpitree"> 
        </div> 
      </div> 
    ); 
  } 
};

kpitree.less文件

.kpitree_panel{ 
 position: relative; 
 width:308px; 
 background-color: #f2f2f2; 
 border: 1px solid #cfcfcf ; 
} 
.kpitree_panel_height_01{ 
 height: 548px; 
} 
.kpitree_panel_height_02{ 
 height: 378px; 
} 
.ksearch-div{ 
 position: relative; 
 top: 10px; 
 margin-left: 4px; 
 width: 310px; 
 height: 30px; 
} 
.ksearch-input{ 
 border: 1px; 
 width: 145px; 
 height: auto; 
 border-radius: 10px; 
} 
.ksearch-icon{ 
 position: relative; 
 left: -24px; 
 width: 17px; 
 height: 17px; 
} 
.ksearch-button{ 
 position: relative; 
 left: 150px; 
 top: -22px; 
 font-size: 12px; 
 color: #999999; 
 padding-top: 3px; 
 text-align: center; 
 cursor: pointer; 
 width: 40px; 
 height:24px; 
 border: solid 0.8px #cbcbcb ; 
 -webkit-border-radius: 8px; 
} 
.kreturn-button{ 
 position: relative; 
 left: 171px; 
 top: -22px; 
 font-size: 12px; 
 color: #999999; 
 padding-top: 3px; 
 text-align: center; 
 cursor: pointer; 
 width: 40px; 
 height: 24px; 
 border: solid 0.8px #cbcbcb; 
 -webkit-border-radius: 8px; 
} 
.kselecte-button{ 
 position: relative; 
 left: 226px; 
 top: -46px; 
 font-size: 12px; 
 color: #999999; 
 padding-top: 3px; 
 text-align: center; 
 cursor: pointer; 
 width: 60px; 
 height: 25px; 
 border: solid 0.8px #cbcbcb; 
 -webkit-border-radius: 8px; 
 background-color: #f2f2f2; 
} 
.kbottom-content{ 
 padding: 10px; 
 color: #999999; 
 margin-left: 13px; 
 overflow-y: scroll; 
 overflow-x: hidden; 
 width: 280px; 
 margin-top: 20px; 
 background-color: #f7f7f7; 
} 
.kbottom-content_height_01{ 
 height: 480px; 
 } 
.kbottom-content_height_02{ 
 height: 318px; 
} 
.knode-hide-show-icon{ 
 width: 10px; 
 height: 10px; 
 cursor: pointer; 
}

下面这些json文件都放入json文件夹中

treelistdata.json文件

[ 
 {"kid":"01","kname":"综合指标","haschild":"1","pid":"-1"}, 
 {"kid":"02","kname":"分析类指标","haschild":"1","pid":"-1"}, 
 {"kid":"03","kname":"组合指标","haschild":"1","pid":"-1"}, 
 {"kid":"04","kname":"移动业务计费收入","haschild":"1","pid":"-1"}, 
 {"kid":"05","kname":"2g业务","haschild":"1","pid":"-1"} 
]

treelistdata01.json文件

[ 
 {"kid":"010","kname":"综合指标1","haschild":"1","pid":"01"}, 
 {"kid":"011","kname":"分析类指标1","haschild":"1","pid":"01"}, 
 {"kid":"012","kname":"组合指标1","haschild":"1","pid":"01"}, 
 {"kid":"013","kname":"移动业务计费收入1","haschild":"1","pid":"01"}, 
 {"kid":"014","kname":"2g业务1","haschild":"1","pid":"01"} 
]

treelistdata010.json文件

[ 
 {"kid":"0100","kname":"综合指标000","haschild":"0","pid":"010"}, 
 {"kid":"0101","kname":"分析类指标000","haschild":"0","pid":"010"}, 
 {"kid":"0102","kname":"组合指标000","haschild":"0","pid":"010"}, 
 {"kid":"0103","kname":"移动业务计费收入000","haschild":"0","pid":"010"}, 
 {"kid":"0104","kname":"2g业务000","haschild":"0","pid":"010"} 
]

searchlistdata.json文件

[ 
 {"kid":"01","kname":"综合指标","haschild":"0","pid":"-1"}, 
 {"kid":"02","kname":"分析类指标","haschild":"0","pid":"-1"}, 
 {"kid":"03","kname":"组合指标","haschild":"0","pid":"-1"}, 
 {"kid":"04","kname":"移动业务计费收入","haschild":"0","pid":"-1"}, 
 {"kid":"05","kname":"2g业务","haschild":"0","pid":"-1"}, 
 {"kid":"01","kname":"综合指标","haschild":"0","pid":"-1"}, 
 {"kid":"02","kname":"分析类指标","haschild":"0","pid":"-1"}, 
 {"kid":"03","kname":"组合指标","haschild":"0","pid":"-1"}, 
 {"kid":"04","kname":"移动业务计费收入","haschild":"0","pid":"-1"}, 
 {"kid":"05","kname":"2g业务","haschild":"0","pid":"-1"}, 
 {"kid":"01","kname":"综合指标","haschild":"0","pid":"-1"}, 
 {"kid":"02","kname":"分析类指标","haschild":"0","pid":"-1"}, 
 {"kid":"03","kname":"组合指标","haschild":"0","pid":"-1"}, 
 {"kid":"04","kname":"移动业务计费收入","haschild":"0","pid":"-1"}, 
 {"kid":"05","kname":"2g业务","haschild":"0","pid":"-1"}, 
 {"kid":"01","kname":"综合指标","haschild":"0","pid":"-1"}, 
 {"kid":"02","kname":"分析类指标","haschild":"0","pid":"-1"}, 
 {"kid":"03","kname":"组合指标","haschild":"0","pid":"-1"}, 
 {"kid":"04","kname":"移动业务计费收入","haschild":"0","pid":"-1"}, 
 {"kid":"05","kname":"2g业务","haschild":"0","pid":"-1"} 
]

树组件运行后的结果：