java - 无法反序列化 `java.util.ArrayList 的实例` 超出 START_OBJECT 令牌

Question

无法将 Json 反序列化为 List 集合。我正在使用 Lombok，它包含字段变量：

@Data
@Builder
@EqualsAndHashCode(exclude = "success")
@NoArgsConstructor
@AllArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = true)
public class AparsersResponceDto {
  private Integer success;
  private ArrayList<String> data;
}

向 API 发布请求的 RestAssured 控制器：

public ValidatableResponse getFirstAparserStatus(AparsersDto toGetAparser) {
    return RestAssured
            .given().spec(getDefaultRequestSpecification())
            .body(toGetAparser)
            .when()
            .post(apars141 + port1)
            .then()
            .log().all();
}

并提取帖子请求的正文：

private AparsersController aparsersController = new AparsersController();


public AparsersResponceDto postFirstBody(AparsersDto aparsersDto) {
    return aparsersController
            .getFirstAparserStatus(aparsersDto) //Sent post request with the body aparsersDto through RestAssured
            .statusCode(200)
            .extract().body().as(AparsersResponceDto.class); // Here i can't make extract of the 'data' field due to collection List. 
}

响应Json：

"success": 1,
"data": {
    "45.90.34.87:59219": [
        "http"
    ],
    "144.76.108.82:41049": [
        "http"
    ],
    "5.9.72.48:59473": [
        "http"
    ],
    "130.0.232.208:49327": [
        "http"
    ],
    "217.172.179.54:39492": [
        "http"
    ],
    ...

完整的错误信息：

com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.util.ArrayList<java.lang.Object>` out of START_OBJECT token at [Source: (StringReader); line: 1, column: 21] (through reference chain: com.rest.dto.AparsersResponceDto["data"])

我该如何解决？

标签： javajacksonlombokrest-assured

Answer 1

data在 JSON 中不是一个，ArrayList<String>而是一个Map<String,List<String>>

所以改变你的DTO如下。

@Data
@Builder
@EqualsAndHashCode(exclude = "success")
@NoArgsConstructor
@AllArgsConstructor
@JsonIgnoreProperties(ignoreUnknown = true)
public class AparsersResponceDto {
   private Integer success;
   private Map<String,List<String>> data;
}