Java实现解析第三方接口返回的json

//这种是data里面有个list的格式
{
   "data":    {
      "username": "system",
      "roles": [      {
         "groupId": null,
         "urt": "6cd3d213-1574-49a8-8fc7-81816575ca5c",
         "manageUnit": null,
         "roleName": "系统管理员",
         "manaunitname": "黄陂区卫生局",
         "manaunitid": "420116",
         "roleId": "chis.system"
      }],
      "realname": "系统管理员",
      "mobile": null
   },
   "code": "200",
   "msg": "success"
}

//创建对象
@Data
public class StationDoctorVo {

    @ApiModelProperty(value = "用户名")
    private String username;

    @ApiModelProperty(value = "角色名称")
    private String realname;

    @ApiModelProperty(value = "手机号码")
    private String mobile;

    @ApiModelProperty(value = "角色列表")
    private List<Map<String,Object>> roles;
}

import com.google.gson.Gson;

String result = "{
   "data":    {
      "username": "system",
      "roles": [      {
         "groupId": null,
         "urt": "6cd3d213-1574-49a8-8fc7-81816575ca5c",
         "manageUnit": null,
         "roleName": "系统管理员",
         "manaunitname": "黄陂区卫生局",
         "manaunitid": "420116",
         "roleId": "chis.system"
      }],
      "realname": "系统管理员",
      "mobile": null
   },
   "code": "200",
   "msg": "success"
}"
Gson gson = new Gson();
JsonObject jsonObject = gson.fromJson(result, JsonObject.class);
StationDoctorVo stationDoctorVo = gson.fromJson(jsonObject.get("data"),StationDoctorVo.class);
List<Map<String, Object>> roles = stationDoctorVo.getRoles();
if (roles != null && roles.size() > 0) {
	//这里获取第一个是因为他返回可能是多个，一个人多个角色
    Map<String, Object> map1 = roles.get(0);
    System.out.println(map1.get("manaunitid").toString());
    System.out.println(map1.get("manaunitname").toString());
    System.out.println(map1.get("urt").toString());
}

//这种是最简单的格式了
{
    "data": {
        "doctorId": "grcs",
        "isOk": 0,
        "doctorName": "光荣测试"
    },
    "code": "200",
    "msg": "success"
}

Gson gson = new Gson();
JsonObject jsonObject4 = gson.fromJson(result2, JsonObject.class);
//获取外层code的值
String code = jsonObject4.get("code").getAsString();
//获取data的值
JsonObject jsonObject1 = jsonObject4.getAsJsonObject("data");
//获取内层doctorName
String msg = jsonObject1.get("doctorName").getAsString();

//创建对象
@Data
public class PatientExistVo {

    @ApiModelProperty(value = "是否新建标志 0: 不能新建 1: 可以新建 2：注销")
    private String isOk;

    @ApiModelProperty(value = "责任医生id  （有档案情况下返回）")
    private String doctorId;

    @ApiModelProperty(value = "责任医生名字（有档案情况下返回）")
    private String doctorName;
}

Gson gson = new Gson();
JsonObject jsonObject = gson.fromJson(result, JsonObject.class);
//先通过外层code判断是否成功返回
if ("200".equals(jsonObject.get("code").getAsString())) {
    //成功返回就用对象接收数据
    PatientExistVo patientExistVo = gson.fromJson(jsonObject.get("data"),PatientExistVo.class);
}

//他们需要的数据格式
{
    "uid":"xkcs",
    "token": "16555222a3e14d389682a8618ae636e3",
    "op": "create",
    "data": {
        "geda": {
            "cardNo": "",
            "personName": "天下第一",
            "photo": ""
        },
        "person": {
            "cardNo": "",
            "personName": "天下第一",
            "sexCode": "1",
            "birthday": "1941-02-15"
        }
    }
}

@Data
public class PatientPushDoctorVo {

    @ApiModelProperty(value = "身份证号码")
    private String idCard;

    @ApiModelProperty(value = "医生工号")
    private String uid;

    @ApiModelProperty(value = "公卫系统token")
    private String token;

    @ApiModelProperty(value = "修改还是新增，create")
    private String op;

    @ApiModelProperty(value = "医生所属机构id")
    private String manaunitid;

    @ApiModelProperty(value = "医生所属机构名称")
    private String manaunitname;

    private Geda geda;

    private Person person;
}

String param = gson.toJson(vo);
//得到String，我们就可以通过这个param去请求了

Map<String, Object> map = new HashMap<>();
map.put("uid", vo.getUid());
map.put("token", vo.getToken());
map.put("idCard", vo.getIdCard());
String param = gson.toJson(map);