拒绝解析又臭又长的JSON---疯狂的KK

在日常工作中，不管是因为接收前端返回约定格式的JSON字符串，还是因为需要约定格式请求第三方服务，或者需要将前端画像xml解析成JSON，再或者需要接入第三方短信，供应商，数据提供商的JSON数据，或是需要提供对外暴露接口的API，可见解析JSON是一个常见操作。

JSON是一个轻量级的数据交换格式。

一：表单数据由数据库实体对象接收

常见的前后端约定字段，指定字段名称后，由数据库实体接收序列化后的表单数据，无序解析。

二：JSONObject解析

前后端约定格式，实体接收String类型，通过JSONObject解析JSON，JSONArray等操作

例如：

[ { "children": [ ], "createBy": "admin", "createTime": 1521171180000, "icon": "fa fa-gear", "menuId": 1, "menuName": "系统管理", "menuType": "M", "orderNum": "1", "params": { }, "parentId": 0, "perms": "", "target": "", "url": "#", "visible": "0" }, { "children": [ ], "createBy": "admin", "createTime": 1521171180000, "icon": "fa fa-video-camera", "menuId": 2, "menuName": "系统监控", "menuType": "M", "orderNum": "2", "params": { }, "parentId": 0, "perms": "", "target": "", "url": "#", "visible": "0" }, { "children": [ ], "createBy": "admin", "createTime": 1521171180000, "icon": "fa fa-bars", "menuId": 3, "menuName": "系统工具", "menuType": "M", "orderNum": "3", "params": { }, "parentId": 0, "perms": "", "target": "", "url": "#", "visible": "0" }, { "children": [ ], "createBy": "admin", "createTime": 1590568770000, "icon": "fa fa-hand-peace-o", "menuId": 1062, "menuName": "我的朋友", "menuType": "C", "orderNum": "1", "params": { }, "parentId": 1, "perms": "system:friends:view", "target": "menuItem", "url": "/system/friends", "visible": "0" }, { "children": [ ], "createBy": "admin", "createTime": 1521171180000, "icon": "#", "menuId": 100, "menuName": "用户管理", "menuType": "C", "orderNum": "1", "params": { }, "parentId": 1, "perms": "system:user:view", "target": "", "url": "/system/user", "visible": "0" }, { "children": [ ], "createBy": "admin", "createTime": 1521171180000, "icon": "#", "menuId": 101, "menuName": "角色管理", "menuType": "C", "orderNum": "2", "params": { }, "parentId": 1, "perms": "system:role:view", "target": "", "url": "/system/role", "visible": "0" }, { "children": [ ], "createBy": "admin", "createTime": 1521171180000, "icon": "#", "menuId": 102, "menuName": "菜单管理", "menuType": "C", "orderNum": "3", "params": { }, "parentId": 1, "perms": "system:menu:view", "target": "", "url": "/system/menu", "visible": "0" } ] 通过JSONObject以及解析JSONArray获取

三：接入第三方API

接入第三方API，或者按约定调用第三方服务时，你会发现约定了又臭有长的JSON格式，包含特定字段，包含token，包含秘钥，一个详细数据解析接口，上百个字段是常见的，而且多种格式嵌套解析，如果单纯将收到的字符串手动转化成JSONObject，还要判空，还要层层遍历，还要验证数据的有效性，这是在是不小的工作量。

改造方法：提取最长，覆盖字段最全的作为实体列接收，含有List数据就由List接收，最外层K值由字段接收，涉及类型判断需按约定传不同数值的，定义为枚举，秘钥等特殊Key值MD5加解密传递。

// 如果url是空，则认为是解析历史数据 不需要拼装请求 if (url != null && !"".equals(url)) { Client client = new Client(); Map<String, String> params = new HashMap<String, String>(); if ("mobileReli".equals(interfaceCode)) { //if类型判断定义为枚举 String infoJson = String.format("{"phone":"%s","name":"%s","curDate":"%s"}", applyRecord.getPhone(), applyRecord.getName(), applyRecord.getFlashblackDate()); StringBuffer sb = new StringBuffer(); long time = System.currentTimeMillis();//重复度高的字段由优特实体类接收 sb.append(secret + "!" + appKey + "!" + time + "!" + applyRecord.getName() + "!" + applyRecord.getPhone() + "!" + secret + "!"); sign = hdsClient.md5(sb.toString()); String param = String.format("appKey=%s&infoJson=%s&sign=%s&time=%s", appKey, infoJson, sign, time); try { jsonData = hdsClient.getResult(url, param); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } else if ("DSModel".equals(interfaceCode)) { String infoJson = String.format("{"mobile":"%s","name":"%s","starttime":"%s"}", applyRecord.getPhone(), applyRecord.getName(), applyRecord.getFlashblackDate()); StringBuffer sb = new StringBuffer(); long time = System.currentTimeMillis(); sb.append(secret + "!" + appKey + "!" + time + "!" + applyRecord.getName() + "!" + applyRecord.getPhone() + "!" + applyRecord.getFlashblackDate() + "!" + secret + "!"); sign = hdsClient.md5(sb.toString()); String param = String.format("appKey=%s&infoJson=%s&sign=%s&time=%s", appKey, infoJson, sign, time); try { jsonData = hdsClient.getResult(url, param); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } else if ("addressDetection".equals(interfaceCode)) { String infoJson = String.format("{"phone":"%s","address":"%s","curDate":"%s"}", applyRecord.getPhone(), applyRecord.getAddress(), applyRecord.getFlashblackDate()); StringBuffer sb = new StringBuffer(); long time = System.currentTimeMillis(); sb.append(secret + "!" + appKey + "!" + time + "!" + applyRecord.getPhone() + "!" + applyRecord.getAddress() + "!" + applyRecord.getFlashblackDate() + "!" + secret + "!"); sign = hdsClient.md5(sb.toString()); String param = String.format("appKey=%s&infoJson=%s&sign=%s&time=%s", appKey, infoJson, sign, time); try { jsonData = hdsClient.getResult(url, param); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } public enum InterfaceCodeEnum { InterfaceCode1(1,"mobileReli"), InterfaceCode2(2,"DSModel"), InterfaceCode3(3,"addressDetection"), . . . ; private Integer code; private String name; InterfaceCodeEnum(Integer code, String name) { this.code = code; this.name = name; } public static String getNameBycode(Integer code) { if (code == null) { return ""; } for (InterfaceCodeEnum a : InterfaceCodeEnum.values()) { if (a.code.equals(code)) { return a.name; } } return ""; } } @Builder @Data public class InterfaceCodeResult implements Serializable { //基础信息 private Base base; //秘钥信息 private AuthInfo authInfo; //外层字段封装为对象接收 private AddressResult addressResult; //重复多层信息List接收 private List<Flashblack> flashblack; }

当接收到JSON字符串时

InterfaceCodeResult codeResult=JSONObject.parseObject(InterfaceCodeResult.getRequestInfo(),InterfaceCodeResult.class); if(PreInterfaceStatus.equals(codeResult.base.getTyep())){ return JavaConvertUtil.conversion(codeResult, CodeParams.class); }

仅需要判断多个类型即可，对应字段会自动解析，当接收又臭又长的XML解析还需要后端验证时，需要封装Util类进行验证调用

---来自腾讯云社区的---疯狂的KK