拒绝解析又臭又长的JSON
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
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原始发表：2020-06-01，如有侵权请联系 cloudcommunity@tencent.com 删除
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