无法反序列化'java.util.ArrayList'的实例`

我无法从JSON文件获取数据。我的JAVA端正在工作，但在PHP中进行了更改，以组装JSON，因为我不能做解析器，我不知道在PHP中知道我得到的JSON格式，但我可以访问代码。 JSON装载的页面如下所示：

<?php
    $startTime = microtime(true);
    include_once("../utils/config.php");
    include_once("../utils/utils.php");
    include_once("../services/rest.utils.php");

    header("Content-Type: application/json",true);

    $from = getADate('from', true);
    $to = getADate('to', false);
    $fromDate = '';
    $toDate = '';
    if ($from <> '') { $fromDate = $from; }
    if ($to <> 'NULL') { $toDate = $to; }

    $body = file_get_contents('php://input');

    if (signatureCheck($body)) {
        $cta = 0;
        $database = conectaDatabase();
        $script = '';
        $pfx = Config::getPrefixo();

        $sql = "SELECT RelatorioID, ProfessorID, AlunoID, TurmaID,
                Bimestre, Data, TipoRelatorio, Conteudo, Situacao FROM {$pfx}Relatorios
                WHERE Data >= $fromDate";
        if ($toDate <> '') { 
            $sql .= " AND Data < $toDate";
        }   

        $qry = $database->query($sql);
        $lista = array();
        $cta = 0;
        while ($row = $qry->fetchObject()) {
            $row->TipoRelatorio = utf8_encode($row->TipoRelatorio);
            $row->Conteudo = utf8_encode($row->Conteudo);
            $lista[] = $row;
            $cta++;
        }

        @$output->response = new StdClass(); // Anonymous object, remove the warning
        $output->response->descricao = "$cta relatórios importados";
        $output->response->status = 200;
        $output->relatorios = $lista;

        $endTime = microtime(true);
        $timeSpent = $endTime - $startTime;
        $output->response->timeSpent = $timeSpent;

        $saida = json_encode($output, JSON_UNESCAPED_UNICODE);
        echo $saida;

        desconectaDB($database);
    } else {
        $description = "não autorizado";
        $status = "401";
        $endTime = microtime(true);
        $timeSpent = $endTime - $startTime;
        echo "{\"status\":{$status}, \"descricao\":\"$description\", \"timeSpent\": \"{$timeSpent}\"}"; 
    }

这就是我试图解析JSON时发生的错误

org.springframework.web.client.RestClientException: Error while extracting response for type
 [java.util.List<com.test.bws.response.RelatorioResponse>] and 
content type [application/json]; nested exception is org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `java.util.ArrayList` out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.util.ArrayList` out of START_OBJECT token
 at [Source: (PushbackInputStream); line: 1, column: 1]


Error while extracting response for type [java.util.List<com.test.bws.response.RelatorioResponse>] and content type [application/json]

org.springframework.http.converter.HttpMessageNotReadableException: JSON parse error: Cannot deserialize instance of `java.util.ArrayList` out of START_OBJECT token; nested exception is com.fasterxml.jackson.databind.exc.MismatchedInputException: Cannot deserialize instance of `java.util.ArrayList` out of START_OBJECT token
 at [Source: (PushbackInputStream); line: 1, column: 1]

org.springframework.web.client.RestClientException:为类型提取响应时出错
[java.util.List]和
内容类型[应用程序/json]；嵌套的异常为org.springframework.http.converter.httpMessageNodeTableException:JSON解析错误：无法反序列化'java.util.ArrayList'的实例，因为它超出了START_对象标记；嵌套异常为com.fasterxml.jackson.databind.exc.MismatchedInputException:无法反序列化'java.util.ArrayList'的实例，因为它超出了START_对象标记
在[源：（PushbackInputStream）；行：1，列：1]
提取类型[java.util.List]和内容类型[application/json]的响应时出错
org.springframework.http.converter.httpmessagenoteradableexception:JSON解析错误：无法反序列化'java.util.ArrayList'的实例，该实例不在START_对象标记中；嵌套异常为com.fasterxml.jackson.databind.exc.MismatchedInputException:无法反序列化'java.util.ArrayList'的实例，因为它超出了START_对象标记
在[源：（PushbackInputStream）；行：1，列：1]

---

感谢您的帮助

问题在于您的JSON如下所示：

{
  "response": {
    ...
  },
  "relatorios": [
    {
      ...
    }
  ]
}

HttpEntity<String> entity = new HttpEntity<>("parameters", new HttpHeaders());
ResponseEntity<RestResponse> response = new RestTemplate().exchange(targetUrl, HttpMethod.GET, entity, RestResponse.class);
List<RelatorioResponse> responses = response.getBody().getRelatorios();

您正试图将其直接映射到

relatorios

列表。您应该创建另一个

response

对象。这应该包含整个JSON响应内容：

public class RestResponse {
    private MyResponse response;
    private List<RelatorioResponse> relatorios;
    // getter and setter
}

然后，您的请求代码应该如下所示：

{
  "response": {
    ...
  },
  "relatorios": [
    {
      ...
    }
  ]
}

HttpEntity<String> entity = new HttpEntity<>("parameters", new HttpHeaders());
ResponseEntity<RestResponse> response = new RestTemplate().exchange(targetUrl, HttpMethod.GET, entity, RestResponse.class);
List<RelatorioResponse> responses = response.getBody().getRelatorios();

HttpEntity entity=new-HttpEntity（“参数”，new-HttpHeaders（））；
ResponseEntity response=new RestTemplate（）.exchange（targetUrl，HttpMethod.GET，entity，RestResponse.class）；
列出响应=response.getBody（）.getRelatorios（）；

JSON中的响应是什么样子的？要反序列化数组列表，我希望您需要一个对象的JSON数组。至少，在

else

子句中返回的JSON看起来不符合此标准。@akokskis我插入了他们发送的测试的图像

HttpEntity<String> entity = new HttpEntity<>("parameters", new HttpHeaders());
ResponseEntity<RestResponse> response = new RestTemplate().exchange(targetUrl, HttpMethod.GET, entity, RestResponse.class);
List<RelatorioResponse> responses = response.getBody().getRelatorios();