我有一个Restcontroller类-PolicyHoldersController-，该类对返回JSON对象的API进行GET请求。当我点击RestController URL时，尽管响应状态为200，但是我还是得到了null。我相信我正在获得有效负载，但是我没有正确地将响应映射到我的Java bean -PolicyHolderBean，它复制了JSON响应的结构。
在PolicyholdersControllers中，我称为另一个控制器-authorizationTokenController-，该控制器还返回带有令牌的JSON。它的实现方式与PolicyHoldersControllerworks相同，并且可以正常工作，因此我很困惑为什么我在浏览器中无法获取PolicyHoldersController的null。我想念什么吗？
PolicyHoldersController：
@RestController
public class PolicyHoldersController {
private HttpHeaders setHeaders() {
AuthorizationTokenController authorizationTokenController =
new AuthorizationTokenController();
AuthorizationTokenBean authorizationTokenBean =
authorizationTokenController.postAuthorizationToken();
HttpHeaders headers = new HttpHeaders();
headers.add("Authorization", authorizationTokenBean.getAuthorizationToken());
headers.add("accept", "application/json");
return headers;
}
@GetMapping("/policyholders")
public PolicyHolderBean getPolicyHolders() {
HttpEntity<String> request =
new HttpEntity<String>(setHeaders());
ResponseEntity<PolicyHolderBean> responseEntity = new RestTemplate().exchange(
"https://api.acmeinsurance.com/policyholders",
HttpMethod.GET,
request,
PolicyHolderBean.class
);
PolicyHolderBean policyholders = responseEntity.getBody();
return policyholders;
}
PolicyHolderBean：
public class PolicyHolderBean {
private PolicyHolderResponse3Bean[] policyholders;
public PolicyHolderBean() {
}
public PolicyHolderBean(PolicyHolderResponse3Bean[] policyholders) {
this.policyholders = policyholders;
}
public PolicyHolderResponse3Bean[] getPolicyHolders() {
return policyholders;
}
public void setPolicyHolders(PolicyHolderResponse3Bean[] policyholders) {
this.policyholders = policyholders;
}
}
PolicyHolderResponse3Bean：
public class PolicyHolderResponse3Bean {
private int createdTimestamp;
private EntityResponse2Bean entity;
private String locator;
private String[] policyLocators;
private int updatedTimestamp;
private int version;
/* Constructors */
public PolicyHolderResponse3Bean() {
}
public PolicyHolderResponse3Bean(int createdTimestamp,
EntityResponse2Bean entity,
String locator,
String[] policyLocators,
int updatedTimestamp,
int version
) {
this.createdTimestamp = createdTimestamp;
this.entity = entity;
this.locator = locator;
this.policyLocators = policyLocators;
this.updatedTimestamp = updatedTimestamp;
this.version = version;
}
/* Getters */
public int getCreatedTimestamp() {
return createdTimestamp;
}
public EntityResponse2Bean getEntity() {
return entity;
}
public String getLocator() {
return locator;
}
public String[] getPolicyLocators() {
return policyLocators;
}
public int getUpdatedTimestamp() {
return updatedTimestamp;
}
public int getVersion() {
return version;
}
/* Setters */
public void setCreatedTimestamp(int createdTimestamp) {
this.createdTimestamp = createdTimestamp;
}
public void setEntity(EntityResponse2Bean entity) {
this.entity = entity;
}
public void setLocator(String locator) {
this.locator = locator;
}
public void setPolicyLocators(String[] policyLocators) {
this.policyLocators = policyLocators;
}
public void setUpdatedTimestamp(int updatedTimestamp) {
this.updatedTimestamp = updatedTimestamp;
}
public void setVersion(int version) {
this.version = version;
}
}
EntityResponse2Bean：
public class EntityResponse2Bean {
private String accountLocator;
private boolean completed;
private String createdTimestamp;
private String locator;
private List<EntityResponse2Bean> subEntitiesByLocator;
private String updatedTimestamp;
private Object values;
/* Constructors */
public EntityResponse2Bean() {
}
public EntityResponse2Bean(String accountLocator, boolean completed, String createdTimestamp, String locator, List<EntityResponse2Bean> subEntitiesByLocator, String updatedTimestamp, Object values) {
this.accountLocator = accountLocator;
this.completed = completed;
this.createdTimestamp = createdTimestamp;
this.locator = locator;
this.subEntitiesByLocator = subEntitiesByLocator;
this.updatedTimestamp = updatedTimestamp;
this.values = values;
}
public String getAccountLocator() {
return accountLocator;
}
public void setAccountLocator(String accountLocator) {
this.accountLocator = accountLocator;
}
public boolean isCompleted() {
return completed;
}
public void setCompleted(boolean completed) {
this.completed = completed;
}
public String getCreatedTimestamp() {
return createdTimestamp;
}
public void setCreatedTimestamp(String createdTimestamp) {
this.createdTimestamp = createdTimestamp;
}
public String getLocator() {
return locator;
}
public void setLocator(String locator) {
this.locator = locator;
}
public List<EntityResponse2Bean> getSubEntitiesByLocator() {
return subEntitiesByLocator;
}
public void setSubEntitiesByLocator(List<EntityResponse2Bean> subEntitiesByLocator) {
this.subEntitiesByLocator = subEntitiesByLocator;
}
public String getUpdatedTimestamp() {
return updatedTimestamp;
}
public void setUpdatedTimestamp(String updatedTimestamp) {
this.updatedTimestamp = updatedTimestamp;
}
public Object getValues() {
return values;
}
public void setValues(Object values) {
this.values = values;
}
}
这是浏览器中的输出：
{
"policyHolders": null
}
这是控制台输出：
: HTTP GET https://api.acmeinsurance.com/policyholders
: Accept=[application/json, application/*+json]
: Response 200 OK
: Reading to [com.socotra.apimiddleware.PolicyHolderBean]
: Using 'application/json;q=0.8', given [text/html, application/xhtml+xml, image/webp, image/apng, application/xml;q=0.9, */*;q=0.8] and supported [application/json, application/*+json, application/json, application/*+json]
: Writing [com.acmeinsurance.PolicyHolderBean@7bb9a975]
: No view rendering, null ModelAndView returned.
: Completed 200 OK, headers={masked}
: Returning cached instance of singleton bean 'liveReloadServerEventListener'
: Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1cc456cb
: Bound request context to thread: org.apache.catalina.connector.RequestFacade@1cc456cb
: GET "/favicon.ico", parameters={}, headers={masked} in DispatcherServlet 'dispatcherServlet'
: Mapped to HandlerExecutionChain with [ResourceHttpRequestHandler [class path resource [META-INF/resources/], class path resource [resources/], class path resource [static/], class path resource [public/], ServletContext resource [/], class path resource []]] and 1 interceptors
: No view rendering, null ModelAndView returned.
: Completed 200 OK, headers={masked}
: Cleared thread-bound request context: org.apache.catalina.connector.RequestFacade@1cc456cb
邮递员的API输出
{
"policyholders": [
{
"locator": "0282cc44-ba28-420d-90a7-e437bc1c2bef",
"version": "2",
"createdTimestamp": "1547761093737",
"updatedTimestamp": "1547761119188",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "0282cc44-ba28-420d-90a7-e437bc1c2bef",
"revision": "11e9-1aa0-40988e20-a822-0242ac110002",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1547761119188",
"updatedTimestamp": "1547761119188",
"values": {
"occupation": [
"Military"
],
"first_name": [
"iguyg"
],
"policyholder_id": [
"854397756"
],
"last_name": [
"gigi"
],
"marital_status": [
"Single"
],
"gender": [
"Female"
],
"date_of_birth": [
"1975-02-12"
]
},
"completed": true,
"flags": [
"flag.entity.workflow.complete"
]
}
},
{
"locator": "d46394fd-fb98-42b5-a5a5-7d57d67e45a9",
"version": "1",
"createdTimestamp": "1547753255083",
"updatedTimestamp": "1547753255820",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "d46394fd-fb98-42b5-a5a5-7d57d67e45a9",
"revision": "11e9-1a8d-f13257b0-8624-0242ac110002",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1547753255083",
"updatedTimestamp": "1547753255083",
"values": {
"policyholder_id": [
"467711991"
]
},
"completed": false,
"flags": []
}
},
{
"locator": "e7f20031-0fbe-489d-9217-64f886b58caa",
"version": "2",
"createdTimestamp": "1546699334507",
"updatedTimestamp": "1546888656274",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "e7f20031-0fbe-489d-9217-64f886b58caa",
"revision": "11e9-12b0-e42e3b90-82c2-0242ac11000c",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1546888656274",
"updatedTimestamp": "1546888656274",
"values": {
"occupation": [
"Military"
],
"first_name": [
"Paco"
],
"policyholder_id": [
"276877294"
],
"last_name": [
"Romerales"
],
"marital_status": [
"Common-in-Law"
],
"gender": [
"Male"
],
"date_of_birth": [
"1970-06-30"
]
},
"completed": true,
"flags": [
"flag.entity.workflow.complete"
]
}
},
{
"locator": "b6aa4dff-e02e-45d3-b06b-b47fef6cb073",
"version": "1",
"createdTimestamp": "1546693107318",
"updatedTimestamp": "1546693107369",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "b6aa4dff-e02e-45d3-b06b-b47fef6cb073",
"revision": "11e9-10e9-97e32160-82c2-0242ac11000c",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1546693107318",
"updatedTimestamp": "1546693107318",
"values": {
"occupation": [
"Unemployed"
],
"first_name": [
"Diego"
],
"last_name": [
"Farias"
],
"marital_status": [
"Widower"
],
"gender": [
"Male"
],
"date_of_birth": [
"1979-05-25"
]
},
"completed": true,
"flags": [
"flag.entity.workflow.complete"
]
}
},
{
"locator": "5b9e2e89-0265-4b7a-9981-3b81e3ee35d5",
"version": "1",
"createdTimestamp": "1546692621948",
"updatedTimestamp": "1546692622006",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "5b9e2e89-0265-4b7a-9981-3b81e3ee35d5",
"revision": "11e9-10e8-76958bc0-82c2-0242ac11000c",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1546692621948",
"updatedTimestamp": "1546692621948",
"values": {
"policyholder_id": [
"546676476"
]
},
"completed": false,
"flags": []
}
},
{
"locator": "dce877ab-c21e-432a-9997-39e3e356c3ca",
"version": "2",
"createdTimestamp": "1546535435129",
"updatedTimestamp": "1546535537410",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "dce877ab-c21e-432a-9997-39e3e356c3ca",
"revision": "11e9-0f7a-b8ef7b80-82c2-0242ac11000c",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1546535537410",
"updatedTimestamp": "1546535537410",
"values": {
"occupation": [
"Medical"
],
"first_name": [
"Emiliana"
],
"policyholder_id": [
"257740828"
],
"last_name": [
"Nosoque"
],
"marital_status": [
"Common-in-Law"
],
"gender": [
"Female"
],
"date_of_birth": [
"1990-04-27"
]
},
"completed": true,
"flags": [
"flag.entity.workflow.complete"
]
}
},
{
"locator": "0dfb5db3-365b-424b-8df3-85e5cb1a0383",
"version": "1",
"createdTimestamp": "1546529777930",
"updatedTimestamp": "1546529777980",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "0dfb5db3-365b-424b-8df3-85e5cb1a0383",
"revision": "11e9-0f6d-4ffc56a0-998c-0242ac110002",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1546529777930",
"updatedTimestamp": "1546529777930",
"values": {
"first_name": [
"Pepito"
],
"last_name": [
"Melenas"
]
},
"completed": true,
"flags": [
"flag.entity.workflow.complete"
]
}
},
{
"locator": "1d5d1fd8-a031-4131-9030-8b94a48e8b2b",
"version": "2",
"createdTimestamp": "1546446785969",
"updatedTimestamp": "1546446932421",
"policyAccounts": [],
"policyLocators": [],
"payments": [],
"entity": {
"locator": "1d5d1fd8-a031-4131-9030-8b94a48e8b2b",
"revision": "11e9-0eac-6c3ece90-998c-0242ac110002",
"accountLocator": "432f222e-dd0d-42ce-88b4-42ae06579e0f",
"createdTimestamp": "1546446932421",
"updatedTimestamp": "1546446932421",
"values": {
"occupation": [
"Business Professional"
],
"first_name": [
"Testcustomer"
],
"policyholder_id": [
"464638311"
],
"last_name": [
"lastname"
],
"marital_status": [
"Married"
],
"gender": [
"Male"
],
"date_of_birth": [
"1990-03-07"
]
},
"completed": true,
"flags": [
"flag.entity.workflow.complete"
]
}
}
]
}
答案 0 :(得分：0)
它与方法getPolicyHolders()的这种实现一起工作：
@GetMapping("/policyholders")
public PolicyHolderBean getPolicyHolders() {
HttpEntity<String> request =
new HttpEntity<String>(setHeaders());
ResponseEntity<String> responseEntity = new RestTemplate().exchange(
"https://api.sandbox.socotra.com/policyholders",
HttpMethod.GET,
request,
String.class
);
String output = responseEntity.getBody();
Gson gson=new Gson();
PolicyHolderBean policyHolders=gson.fromJson(output,PolicyHolderBean.class);
return policyHolders;
}
答案 1 :(得分：0)
使用@JsonProperty与您的DTO ex映射输出字符串：
@JsonProperty（“ authorizationToken”） 私有字符串authToken;
，并继续使用ResponseEntity中的对象代替String
ResponseEntity<SecurityToken> responseEntity = new RestTemplate().postForEntity(
endpoint,
credentials,
SecurityToken.class
);