java - 使用泛型时，RestClient 不会返回精确的未编码对象

Question

我正在进行 RESTful WS 调用，如下所示:

ResponseEntity<ResponseHolder> responseEntity =
                restTemplate.exchange(url, HttpMethod.GET, requestEntity, ResponseHolder.class, 300788);

但是，当返回时，我检查responseEntity内的值，它是ElementNsImpl对象，而不是我嵌入到ResponseHolder中的Employee对象。因此，条件 (responseEntity.getBody().getResponse() instanceof Employee) 的计算结果为 false!

<小时/>

下面是我的服务器端 Controller 方法:

@RequestMapping(value = "/{empId}", method = RequestMethod.GET)
    public @ResponseBody ResponseHolder getEmployee(@PathVariable int empId) {
        System.out.println("Returning employee details for empId = " + empId);
        Employee employee = new Employee(123, "Akshay", "A", "Technology", 500000);

        ResponseHolder<Employee> responseHolder = new ResponseHolder<Employee>(employee, null);

        return responseHolder;
    }

下面是我的 ResponseHolder.java 类的代码:

import javax.xml.bind.annotation.XmlAnyElement;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlSeeAlso;

@XmlRootElement(name = "response")
@XmlSeeAlso(Employee.class)
public class ResponseHolder<T> {

    private T response;
    private ErrorStatus errorStatus;

    public ResponseHolder() {
    }

    public ResponseHolder(T response, ErrorStatus errorStatus) {
        this.response = response;
        this.errorStatus = errorStatus;
    }

    public T getResponse() {
        return response;
    }

    @XmlAnyElement
    public void setResponse(T response) {
        this.response = response;
    }

    public ErrorStatus getErrorStatus() {
        return errorStatus;
    }

    @XmlElement
    public void setErrorStatus(ErrorStatus errorStatus) {
        this.errorStatus = errorStatus;
    }
}

我究竟做错了什么？

谢谢。

Answer 1

您的响应不是 Employee，而是 Employee 的序列化(字符串)。您必须在客户端重新组合数据，然后填充员工对象。