bootstrap-treeview 实现级联选择

该方式通过修改源码：

/*以下方法被改动,调用时要特别注意 2019-09-11  zhoujunming3*/
Tree.prototype.toggleCheckedState = function (node, options) {
   if (!node) return;
   //this.setCheckedState(node, !node.state.checked, options);
       this.setCheckedChildrenState(node, !node.state.checked, options);
       if(node.state.checked) {
           this.setCheckedParentState(node, node.state.checked, options);
       }
       if(!node.state.checked){
           this.setUnCheckedParentState(node, node.state.checked, options);
   }
};

   Tree.prototype.setCheckedChildrenState = function(node, state, options) {
       this.setCheckedState(node, state, options);
       if(node.nodes !== undefined && node.nodes.length > 0) {
           for(let i = 0,len=node.nodes.length; i < len; i++) {
               this.setCheckedChildrenState(node.nodes[i], node.state.checked, options);
           }
       }
   };

   Tree.prototype.setCheckedParentState = function(node, state, options) {
       this.setCheckedState(node, state, options);
   if(node.parentId !== undefined) {
           let parent_ = this.nodes[node.parentId];
           this.setCheckedParentState(parent_, state, options);
       }

   };

   Tree.prototype.setUnCheckedParentState = function(node, state, options) {
       let flag = true;
       if (node.parentId !== undefined) {
           let parent_ = this.nodes[node.parentId];
           for (let i = 0, len = parent_.nodes.length; i < len; i++) {
               if (parent_.nodes[i].state.checked) {
                   flag = false;
                   break;
               }
           }
           if(flag){
               this.setCheckedState(parent_, state, options);
               this.setUnCheckedParentState(parent_, state, options);
      }
       }

   }
   /*以上方法被改动,调用时要特别注意*/

还有一种通过外部渲染进行级联选择，这种方式数据量大时渲染较慢，上边是自己的后期实现

核心方法

var nodeCheckedSilent = false; 
function nodeChecked (event, node){ 
 if(nodeCheckedSilent){ 
  return; 
 } 
 nodeCheckedSilent = true; 
 checkAllParent(node); 
 checkAllSon(node); 
 nodeCheckedSilent = false; 
} 
 
var nodeUncheckedSilent = false; 
function nodeUnchecked (event, node){ 
 if(nodeUncheckedSilent) 
  return; 
 nodeUncheckedSilent = true; 
 uncheckAllParent(node); 
 uncheckAllSon(node); 
 nodeUncheckedSilent = false; 
} 
 
//选中全部父节点 
function checkAllParent(node){ 
 $('#searchTree').treeview('checkNode',node.nodeId,{silent:true}); 
 var parentNode = $('#searchTree').treeview('getParent',node.nodeId); 
 if(!("nodeId" in parentNode)){ 
  return; 
 }else{ 
  checkAllParent(parentNode); 
 } 
} 
//取消全部父节点 
function uncheckAllParent(node){ 
 $('#searchTree').treeview('uncheckNode',node.nodeId,{silent:true}); 
 var siblings = $('#searchTree').treeview('getSiblings', node.nodeId); 
 var parentNode = $('#searchTree').treeview('getParent',node.nodeId); 
 if(!("nodeId" in parentNode)) { 
  return; 
 } 
 var isAllUnchecked = true; //是否全部没选中 
 for(var i in siblings){ 
  if(siblings[i].state.checked){ 
   isAllUnchecked=false; 
   break; 
  } 
 } 
 if(isAllUnchecked){ 
  uncheckAllParent(parentNode); 
 } 
 
} 
 
//级联选中所有子节点 
function checkAllSon(node){ 
 $('#searchTree').treeview('checkNode',node.nodeId,{silent:true}); 
 if(node.nodes!=null&&node.nodes.length>0){ 
  for(var i in node.nodes){ 
   checkAllSon(node.nodes[i]); 
  } 
 } 
} 
//级联取消所有子节点 
function uncheckAllSon(node){ 
 $('#searchTree').treeview('uncheckNode',node.nodeId,{silent:true}); 
 if(node.nodes!=null&&node.nodes.length>0){ 
  for(var i in node.nodes){ 
   uncheckAllSon(node.nodes[i]); 
  } 
 } 
} 

6-27 : 经部分网友反馈，图中的 if(!("id" in perentNode)) 需要改成 if(!("nodeId" in perentNode))才能正常运行，我想应该是版本问题，上面代码中已经改正了。如果运行不了，请改回 if(!("id" in perentNode))试一下。（谢谢大家提出）
因为treeview中silent属性指定了无效（我也不知道为什么委屈），所以多加了两个变量来控制

$('#searchTree').treeview({ 
  showCheckbox:true, 
  data:treeData, 
  onNodeChecked:nodeChecked , 
  onNodeUnchecked:nodeUnchecked 
 });