遍历json

var _json = {
        "children": [{
            "children": [{
                "children": [{
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 350,
                    "order": "1",
                    "par_id": 318,
                    "paragraph_id": 470,
                    "text": "新5",
                    "state": "open",
                    "domId": "_easyui_tree_14",
                    "target": {"pageY": 146}
                }, {
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 320,
                    "order": "2",
                    "par_id": 6,
                    "paragraph_id": 440,
                    "text": "进攻打法",
                    "state": "open",
                    "domId": "_easyui_tree_4"
                }, {
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 321,
                    "order": "3",
                    "par_id": 6,
                    "paragraph_id": 441,
                    "text": "中场打法",
                    "state": "open",
                    "domId": "_easyui_tree_5"
                }],
                "content": "",
                "distance": 0,
                "id": 6,
                "order": "(二).",
                "par_id": 4,
                "paragraph_id": 230,
                "text": "门诊工作",
                "state": "open",
                "domId": "_easyui_tree_3",
                "target": {"jQuery11130507155963828726": 50}
            }, {
                "children": [],
                "content": "",
                "distance": 0,
                "id": 7,
                "order": "(三).",
                "par_id": 4,
                "paragraph_id": 240,
                "text": "医技科室",
                "state": "open",
                "domId": "_easyui_tree_6"
            }, {
                "children": [{
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 351,
                    "order": "2",
                    "par_id": 318,
                    "paragraph_id": 471,
                    "text": "新1",
                    "state": "open",
                    "domId": "_easyui_tree_9"
                }, {
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 352,
                    "order": "3",
                    "par_id": 318,
                    "paragraph_id": 472,
                    "text": "示范点",
                    "state": "open",
                    "domId": "_easyui_tree_10"
                }, {
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 353,
                    "order": "4",
                    "par_id": 318,
                    "paragraph_id": 473,
                    "text": "发生大",
                    "state": "open",
                    "domId": "_easyui_tree_11"
                }, {
                    "children": [],
                    "content": "",
                    "distance": 0,
                    "id": 354,
                    "order": "5",
                    "par_id": 318,
                    "paragraph_id": 474,
                    "text": "选择",
                    "state": "open",
                    "domId": "_easyui_tree_12"
                }],
                "content": "",
                "distance": 0,
                "id": 318,
                "order": "(四).",
                "par_id": 4,
                "paragraph_id": 438,
                "text": "发生大",
                "state": "open",
                "domId": "_easyui_tree_7",
                "target": {"jQuery11130507155963828726": 66, "entered": false}
            }],
            "content": "",
            "distance": 0,
            "id": 4,
            "order": "一.",
            "par_id": 1,
            "paragraph_id": 230,
            "text": "医疗质控工作小结",
            "state": "open",
            "domId": "_easyui_tree_2",
            "target": {"jQuery11130507155963828726": 46}
        }, {
            "children": [],
            "content": "",
            "distance": 0,
            "id": 8,
            "order": "二.",
            "par_id": 1,
            "paragraph_id": 230,
            "text": "整改意见",
            "state": "open",
            "domId": "_easyui_tree_13"
        }],
        "content": "",
        "distance": 0,
        "id": 1,
        "order": "",
        "par_id": 0,
        "paragraph_id": 240,
        "text": "目录",
        "state": "open",
        "domId": "_easyui_tree_1",
        "target": {"jQuery11130507155963828726": 42}
    };
//利用for循环，IIFE函数
  forJson(_json);
    function forJson(arr) {
        if (arr.children.length) {
            console.log(arr,"par");
            for (var i = 0; i < arr.children.length; i++) {
                !function (j) {
                    forJson(arr.children[j]);
                }(i)
            }
        } else {
            console.log(arr,"son"); //循环打出不是目录下的
        }
    }

// 利用数组map

 mapJson(_json);
    function mapJson(json) {
        json.children.map(function(val,index){
            val.children.length ?console.log(val,"par") & mapJson(val) : console.log(val,"son");
        })
    }