java - 如何将json数组映射到java类

Question

我正在尝试将请求正文从 postman 映射到 Spring Boot 实体，

{
"college":"0",
"collegeName":"",
"email":"a.r@g.com",
"firstName":"Mike",
"gradEndYear":"2017",
"gradStartYear":"2014",
"lastName":"worrell",
"marks":[
    {"sem1":60},
    {"sem2":70},
    {"sem3":80},
    {"sem4":60},
    {"sem5":60},
    {"sem6":60},
    {"sem7":70},
    {"sem8":60}
    ]
}

问题是我尝试将标记数组映射到 map ，但出现以下错误

message": "JSON parse error: Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Can not deserialize instance of java.util.LinkedHashMap out of START_ARRAY token\n at [Source: java.io.PushbackInputStream@2b05836e; line: 9, column: 9] (through reference chain: icms.external.springboot.candidateRegistration.model.CandidateRegistrationForm[\"marks\"])

Java 模型

@Component
@Scope(BeanDefinition.SCOPE_PROTOTYPE)
public class CandidateRegistrationForm
{
    private String firstName;
    private String middleName;
    private String lastName;
    private String email;
    private String college;
    private String collegeName;
    private String gradStartYear;
    private String gradEndYear;

    private Map<String, Integer> marks = new HashMap<>();

//getters and setters
  }

Answer 1

要么更改 json，以便将其映射到 java map 数据结构，在这种情况下，json 将类似于 “标记”: { “SEM1”:60， “SEM2”:70， }

或者使用数组列表代替 map 。