Spring Android Get Request 实现：无法提取响应：没有找到适合响应类型和内容类型的 HttpMessageConverter

Question

我正在尝试实现 Android spring get 请求。当我运行应用程序时，出现以下错误。

无法提取响应：找不到合适的 HttpMessageConverter 响应类型 [com.example.userprofiledemo.UserProfile] 和内容 输入 [text/html;charset=UTF-8]

Respose Body 包含嵌套类和类列表，Respose xml 如下所示：

<UserProfile xmlns="http://schemas.datacontract.org/2004/07/"xmlns:i="http://www.w3.org/2001/XMLSchema-instance">

<Address>Degisim  A Blok Asmakat</Address>
<City>Adana</City>

<UserBookingInfo>
    <ArrivalDate>2012-01-03T00:00:00</ArrivalDate>
    <CourseTypeCode>ILS</CourseTypeCode>
</UserBookingInfo>

<UserPhotoList>
  <UserPhoto> 
    <LikeCount>10</LikeCount>
    <UserPhotoId>123</UserPhotoId>
  </UserPhoto>

   <UserPhoto> 
    <LikeCount>11</LikeCount>
    <UserPhotoId>129</UserPhotoId>
  </UserPhoto>

  <UserPhoto> 
    <LikeCount>11</LikeCount>
    <UserPhotoId>129</UserPhotoId>
  </UserPhoto>
</UserPhotoList>

</UserProfile> 

注意：-

1. UserProfile(Userprofile.java) 是根类或节点
2. UserBookingInfo(UserBookingInfo.java) 是 UserProfile 中的元素。
3. UserPhoteList(UserPhoteList.java) 是UserPhotos(UserPhote.java) 在UsersProfile 中的列表

这就是我使用 Spring Android 解析响应所做的工作。

我的 REST 客户端 PopulatePojo.java

public class PopulatePojo {

public UserProfile GetUserProfile() {

    RestTemplate restTemplate = new RestTemplate(true);


    List<HttpMessageConverter<?>> messageConverters = new ArrayList<HttpMessageConverter<?>>();
    FormHttpMessageConverter msgConverter = new FormHttpMessageConverter();
    messageConverters.add(new StringHttpMessageConverter());
    messageConverters.add(new SourceHttpMessageConverter());
    restTemplate.setMessageConverters(messageConverters);


    UserProfile userProfile = null;
    try {
        userProfile = restTemplate.getForObject(url, UserProfile.class);
    } catch (RestClientException e) {
        e.printStackTrace();

    }
    return userProfile;
}
}

Bean 类 UserProfile.java

@Root
public class UserProfile {

@Element(name = "Address", required = false)
private String address;

      @Element(name="City",required=false)
private String city;

      @Element(name="UserBookingInfo",required=false)
private UserBookingInfo userBookingInfo;

      @Element(name = "UserPhotoList")
private UserPhotoList userPhotoList;

      public String getAddress() {
    return address;
}

public void setAddress(String address) {
    this.address = address;
}

      public String getCity() {
    return city;
}

public void setCity(String city) {
    this.city = city;
}

      public UserBookingInfo getUserBookingInfo() {
    return userBookingInfo;
}

public void setUserBookingInfo(UserBookingInfo userBookingInfo) {
    this.userBookingInfo = userBookingInfo;
}

     public UserPhotoList getUserPhotoList() {
    return userPhotoList;
}

public void setUserPhotoList(UserPhotoList userPhotoList) {
    this.userPhotoList = userPhotoList;
}



}

Bean 类 UserBookingInfo.java

public class UserBookingInfo {

@Element(name="ArrivalDate",required=false)
private String arrivalDate;

@Element(name="CourseTypeCode",required=false)
private String courseTypeCode;

      public String getArrivalDate() {
    return arrivalDate;
}

public void setArrivalDate(String arrivalDate) {
    this.arrivalDate = arrivalDate;
}

public String getCourseTypeCode() {
    return courseTypeCode;
}

public void setCourseTypeCode(String courseTypeCode) {
    this.courseTypeCode = courseTypeCode;
}
 }

UserPhotoList(UserPhotoList.java)List的Bean类

@Root(name="UserPhotoList")
public class UserPhotoList {

@ElementList(inline=true,entry="UserPhoto")
private List<UserPhoto> userPhotos;

public List<UserPhoto> getUserPhotos() {
    return userPhotos;
}

public void setUserPhotos(List<UserPhoto> userPhotos) {
    this.userPhotos = userPhotos;
}

}

UserPhoto.java 的 Bean 类

@Root
public class UserPhoto {

@Element(name = "LikeCount", required = false)
private String likeCount;

      @Element(name = "UserPhotoId ", required = false)
private String userPhotoId ;

      public String getLikeCount() {
    return likeCount;
}

public void setLikeCount(String likeCount) {
    this.likeCount = likeCount;
}

      public String getUserPhotoId() {
    return userPhotoId;
}

public void setUserPhotoId(String userPhotoId) {
    this.userPhotoId = userPhotoId;
}     

  }

请告诉我哪里做错了。非常感谢任何帮助。

当我使用 simpleframe 和 Httpget 时效果很好

以下是不使用 RestTemplate 的工作代码

新线程(new Runnable() {

                          @Override
        public void run() {

            String xmlData = retrieve(url);
            Serializer serializer = new Persister();

            Reader reader = new StringReader(xmlData);
            try {
                UserProfile profile = serializer.read     (UserProfile.class,
                        reader, false);
            } catch (Exception e) {
                Toast.makeText(MainActivity.this, "Error Occured",
                        Toast.LENGTH_LONG).show();
                e.printStackTrace();
            }

} }).start();

公共字符串检索（字符串网址）{

    HttpGet getRequest = new HttpGet(url);

    try {

        HttpResponse getResponse = client.execute(getRequest);
        final int statusCode = getResponse.getStatusLine().getStatusCode();
        if (statusCode != HttpStatus.SC_OK) {
            return null;
        }

        HttpEntity getResponseEntity = getResponse.getEntity();

        if (getResponseEntity != null) {
            return EntityUtils.toString(getResponseEntity);
        }

    } catch (IOException e) {
        getRequest.abort();
        Log.w(getClass().getSimpleName(), "Error for URL " + url, e);
    }

    return null;

}

如何使用 RestTemplete 实现相同的目标

这几天我遇到了问题，非常感谢任何帮助

Answer 1

您的服务器返回一个 XML 内容，但说它返回 HTML 内容（根据错误消息，内容类型是 text/html），因此解析失败。您需要确保您的服务器返回类似 text/xml 的内容，并且您的 rest 模板对象中有正确的转换器。

编辑：尝试添加此消息转换器。 放在第一位（在StringHttpMessageConverter 和SourceHttpMessageConverter 之前）

Jaxb2RootElementHttpMessageConverter jaxbMessageConverter = new Jaxb2RootElementHttpMessageConverter();
List<MediaType> mediaTypes = new ArrayList<MediaType>();
mediaTypes.add(MediaType.TEXT_HTML);
jaxbMessageConverter.setSupportedMediaTypes(mediaTypes);
messageConverters .add(jaxbMessageConverter);