如何将 http 响应放入 Set

Question

如何将 http 响应放入 Employee 类型的集合（Collection Set）中。我正在获取数据作为 HTTP 响应，但我必须将其放入员工类型的集合（集合集）中public Set<Employee> getAllEmployees() throws ServiceException {    setOtherAppDetails();    HttpStatus status = HttpStatus.OK;    Set<Employee> employees = new HashSet<Employee>();    try {        System.out.println("Inside newly created DNG controller method");        String postUrl = "http://localhost:8081/otherApp/empserv/list/dngEmployees";        HttpClient httpClient = HttpClientBuilder.create().build();        HttpPost post = new HttpPost(postUrl);        HttpResponse response = httpClient.execute(post);        HttpEntity entity = response.getEntity();        System.out.println("responseBody =" +EntityUtils.toString(entity));        // employees.add((Employee)response); wants to do something like this but its not working, sorry if it seems silly     }  catch (IOException exception) {        exception.printStackTrace();        status = HttpStatus.INTERNAL_SERVER_ERROR;    }           return employees;}响应应保存在 Set 中

Answer 1

您可以使用库 Jackson 将 json 解析为 Set。

如果你使用 Maven 首先导入依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.9.9.2</version>
</dependency>

然后你可以解析 http 响应如下：

ObjectMapper mapper = new ObjectMapper();
Set<Employee> myObjects = mapper.readValue(EntityUtils.toString(entity), new TypeReference<Set<Employee>>(){});

对象 Employee 需要是响应的准确表示