vue中使用$http.post请求传参的错误及解决

	 handleAdd(node) {
		this.$http.post("/item/cateGory/addCategory",{
				node:node
				})
				.then(({data})=>{
						this.$emit("close");
						this.$message.success("添加成功！");
				}).catch(() => {
				     this.$message.error("添加失败！");
				    });
				    }

 handleAdd(node) {
		this.$http({
					method:'post',
					url:'/item/category/addCategory',
					data: node
				}).then(({data})=>{
						this.$emit("close");
						this.$message.success("添加成功！");
				}).catch(() => {
             this.$message.error("添加失败！");
            });
            }

 handleAdd(node) {
	this.$http.post("/item/category/addCategory",{
				node:this.$qs.stringify(node)
				})
				.then(({data})=>{
						this.$emit("close");
						this.$message.success("添加成功！");
				}).catch(() => {
				     this.$message.error("添加失败！");
				    });
	}

 var json=[{"msg”：“123"}];
 var temp=encodeURI(JSON.stringify(json));      //重点
 var urls="http://202.114.207.232:8080/WEB/data?operations="+temp;
            this.$axiOS({type:'post',url:urls, dataType:'json' }).then( res => { console.log(res) }).catch( e => { console.info(e) })

var Data=[{}]
var url = "http://111.111.111.111:8080/web/data";
var params = new URLSearchParams();
params.append("operations", JSON.stringify(Data));           //重点
// params.append('param2', 'value2');
that.$axios.post(url, params)
    .then(response => {
        // post 成功，response.data 为返回的数据
        console.log(response.data)
    })
    .catch(error => {
        // 请求失败
        console.log(error)
    })