Java Jackson多态反序列化与Spring Boot | JSON解析错误：对象条目内/之间的输入意外结束

我正在使用@JsonTypeInfo和@JsonSubTypes对实体进行序列化/反序列化

下面是我正在做的代码

OrganizationDTO.java

FullTimeEmployeeDTO.java（子类）

PartTimeEmployeeDTO.java（子类）

组织控制员

我得到的例外如下

{
    "timestamp": "2019-11-29T10:35:29.146+0000",
    "status": 400,
    "error": "Bad Request",
    "message": "JSON parse error: Unexpected end-of-input within/between Object entries; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unexpected end-of-input within/between Object entries\n at [Source: (PushbackInputStream); line: 10, column: 21] (through reference chain: com.example.demo.dto.OrganizationDTO[\"employees\"]->java.util.ArrayList[1])",
    "path": "/organizations"
}

我想知道，在试图通过

readValue（）

将字符串JSON转换为

OrganizationDTO

对象时，同样的实现是否起作用。下面是一个例子

    public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();

        OrganizationDTO orgDTO = mapper.readValue(
                "{\n" +
                        "    \"name\": \"My Organization\",\n" +
                        "    \"employees\": [\n" +
                        "        {\n" +
                        "            \"type\": \"full\",\n" +
                        "            \"name\": \"Vinit Solanki\",\n" +
                        "            \"salary\": 200\n" +
                        "        },\n" +
                        "        {\n" +
                        "            \"type\": \"full\",\n" +
                        "            \"name\": \"Vinit Solanki\",\n" +
                        "            \"salary\": 130\n" +
                        "        }\n" +
                        "    ]\n" +
                        "}",
                OrganizationDTO.class);

    }

---

有人知道我为什么会犯这个错误吗？谢谢。

看起来您的端点没有收到完整的json字符串（

输入的意外结束

）。您是否可以检查/打开spring boot上的日志，并查看它试图反序列化到

OrganizationDTO

中的字符串是什么？您的端点似乎没有接收到完整的json字符串（

输入的意外结束

）。您能否检查/打开spring boot上的日志，并查看它试图反序列化到

组织中的字符串是什么？
@JsonTypeName("full")
public class FullTimeEmployeeDTO extends EmployeeDTO {
    private int salary;
    //getter and setter
}

@JsonTypeName("part")
public class PartTimeEmployeeDTO extends EmployeeDTO {
    private int hourlyRate;
    //getter and setter
}

@PostMapping
public ResponseEntity<ResponseUtil<Employee>> save(@RequestBody OrganizationDTO organization) {     
        organizationService.save(organization);
        return new ResponseEntity<>(new ResponseUtil<Employee>("Data Saved Successfully."), HttpStatus.CREATED);
}

{
    "name": "My Organization",
    "employees": [
        {
            "type": "full",
            "name": "Vinit Solanki",
            "salary": 200
        },
        {
            "type": "full",
            "name": "Viren Shah",
            "salary": 300
        }
    ]
}

{
    "timestamp": "2019-11-29T10:35:29.146+0000",
    "status": 400,
    "error": "Bad Request",
    "message": "JSON parse error: Unexpected end-of-input within/between Object entries; nested exception is com.fasterxml.jackson.databind.JsonMappingException: Unexpected end-of-input within/between Object entries\n at [Source: (PushbackInputStream); line: 10, column: 21] (through reference chain: com.example.demo.dto.OrganizationDTO[\"employees\"]->java.util.ArrayList[1])",
    "path": "/organizations"
}


    public static void main(String[] args) throws JsonProcessingException {
        ObjectMapper mapper = new ObjectMapper();

        OrganizationDTO orgDTO = mapper.readValue(
                "{\n" +
                        "    \"name\": \"My Organization\",\n" +
                        "    \"employees\": [\n" +
                        "        {\n" +
                        "            \"type\": \"full\",\n" +
                        "            \"name\": \"Vinit Solanki\",\n" +
                        "            \"salary\": 200\n" +
                        "        },\n" +
                        "        {\n" +
                        "            \"type\": \"full\",\n" +
                        "            \"name\": \"Vinit Solanki\",\n" +
                        "            \"salary\": 130\n" +
                        "        }\n" +
                        "    ]\n" +
                        "}",
                OrganizationDTO.class);

    }