blocks|key|7320|text|您可以在RestTemplate中设置一个拦截器"ClientHttpRequestInterceptor“，以避免每次发送请求时都设置报头。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7321|public+class+HeaderRequestInterceptor+implements+ClientHttpRequestInterceptor+{

++++++++private+final+String+headerName;

++++++++private+final+String+headerValue;

++++++++public+HeaderRequestInterceptor(String+headerName,+String+headerValue)+{
++++++++++++this.headerName+=+headerName;
++++++++++++this.headerValue+=+headerValue;
++++++++}

++++++++@Override
++++++++public+ClientHttpResponse+intercept(HttpRequest+request,+byte[]+body,+ClientHttpRequestExecution+execution)+throws+IOException+{
++++++++++++request.getHeaders().set(headerName,+headerValue);
++++++++++++return+execution.execute(request,+body);
++++++++}
++++}|code-block|syntax|javascript|7322|然后|7323|List<ClientHttpRequestInterceptor>+interceptors+=+new+ArrayList<ClientHttpRequestInterceptor>();
interceptors.add(new+HeaderRequestInterceptor("Accept",+MediaType.APPLICATION_JSON_VALUE));

RestTemplate+restTemplate+=+new+RestTemplate();
restTemplate.setInterceptors(interceptors);|7324|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

You could set an interceptor "ClientHttpRequestInterceptor" in your RestTemplate to avoid setting the header every time you send a request.

<pre><code>public class HeaderRequestInterceptor implements ClientHttpRequestInterceptor {

 private final String headerName;

 private final String headerValue;

 public HeaderRequestInterceptor(String headerName, String headerValue) {
 this.headerName = headerName;
 this.headerValue = headerValue;
 }

 @Override
 public ClientHttpResponse intercept(HttpRequest request, byte[] body, ClientHttpRequestExecution execution) throws IOException {
 request.getHeaders().set(headerName, headerValue);
 return execution.execute(request, body);
 }
 }
</code></pre>

Then

<pre><code>List&lt;ClientHttpRequestInterceptor&gt; interceptors = new ArrayList&lt;ClientHttpRequestInterceptor&gt;();
interceptors.add(new HeaderRequestInterceptor("Accept", MediaType.APPLICATION_JSON_VALUE));

RestTemplate restTemplate = new RestTemplate();
restTemplate.setInterceptors(interceptors);
</code></pre>

blocks|key|223950|text|如果您像我一样，很难找到一个使用标头和基本身份验证以及rest模板交换API的示例，这就是我最终解决的问题……|type|unstyled|depth|inlineStyleRanges|entityRanges|data|223951|private+HttpHeaders+createHttpHeaders(String+user,+String+password)
{
++++String+notEncoded+=+user+%2B+":"+%2B+password;
++++String+encodedAuth+=+Base64.getEncoder().encodeToString(notEncoded.getBytes());
++++HttpHeaders+headers+=+new+HttpHeaders();
++++headers.setContentType(MediaType.APPLICATION_JSON);
++++headers.add("Authorization",+"Basic+"+%2B+encodedAuth);
++++return+headers;
}

private+void+doYourThing()+
{
++++String+theUrl+=+"http://blah.blah.com:8080/rest/api/blah";
++++RestTemplate+restTemplate+=+new+RestTemplate();
++++try+{
++++++++HttpHeaders+headers+=+createHttpHeaders("fred","1234");
++++++++HttpEntity<String>+entity+=+new+HttpEntity<String>("parameters",+headers);
++++++++ResponseEntity<String>+response+=+restTemplate.exchange(theUrl,+HttpMethod.GET,+entity,+String.class);
++++++++System.out.println("Result+-+status+("%2B+response.getStatusCode()+%2B+")+has+body:+"+%2B+response.hasBody());
++++}
++++catch+(Exception+eek)+{
++++++++System.out.println("**+Exception:+"%2B+eek.getMessage());
++++}
}|code-block|syntax|javascript|223952|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

If, like me, you struggled to find an example that uses headers with basic authentication and the rest template exchange API, this is what I finally worked out...

<pre><code>private HttpHeaders createHttpHeaders(String user, String password)
{
 String notEncoded = user + ":" + password;
 String encodedAuth = Base64.getEncoder().encodeToString(notEncoded.getBytes());
 HttpHeaders headers = new HttpHeaders();
 headers.setContentType(MediaType.APPLICATION_JSON);
 headers.add("Authorization", "Basic " + encodedAuth);
 return headers;
}

private void doYourThing() 
{
 String theUrl = "http://blah.blah.com:8080/rest/api/blah";
 RestTemplate restTemplate = new RestTemplate();
 try {
 HttpHeaders headers = createHttpHeaders("fred","1234");
 HttpEntity&lt;String&gt; entity = new HttpEntity&lt;String&gt;("parameters", headers);
 ResponseEntity&lt;String&gt; response = restTemplate.exchange(theUrl, HttpMethod.GET, entity, String.class);
 System.out.println("Result - status ("+ response.getStatusCode() + ") has body: " + response.hasBody());
 }
 catch (Exception eek) {
 System.out.println("** Exception: "+ eek.getMessage());
 }
}
</code></pre>

blocks|key|223985|text|这是一个简单的答案。希望这能帮助到别人。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|223986|import+org.springframework.boot.devtools.remote.client.HttpHeaderInterceptor;
import+org.springframework.http.MediaType;
import+org.springframework.http.client.ClientHttpRequestInterceptor;
import+org.springframework.web.client.RestTemplate;


public+String+post(SomeRequest+someRequest)+{
++++//+create+a+list+the+headers+
++++List<ClientHttpRequestInterceptor>+interceptors+=+new+ArrayList<>();
++++interceptors.add(new+HttpHeaderInterceptor("Accept",+MediaType.APPLICATION_JSON_VALUE));
++++interceptors.add(new+HttpHeaderInterceptor("ContentType",+MediaType.APPLICATION_JSON_VALUE));
++++interceptors.add(new+HttpHeaderInterceptor("username",+"user123"));
++++interceptors.add(new+HttpHeaderInterceptor("customHeader1",+"c1"));
++++interceptors.add(new+HttpHeaderInterceptor("customHeader2",+"c2"));
++++//+initialize+RestTemplate
++++RestTemplate+restTemplate+=+new+RestTemplate();
++++//+set+header+interceptors+here
++++restTemplate.setInterceptors(interceptors);
++++//+post+the+request.+The+response+should+be+JSON+string
++++String+response+=+restTemplate.postForObject(Url,+someRequest,+String.class);
++++return+response;
}|code-block|syntax|javascript|223987|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is a simple answer. Hope it helps someone.

<pre><code>import org.springframework.boot.devtools.remote.client.HttpHeaderInterceptor;
import org.springframework.http.MediaType;
import org.springframework.http.client.ClientHttpRequestInterceptor;
import org.springframework.web.client.RestTemplate;


public String post(SomeRequest someRequest) {
 // create a list the headers 
 List&lt;ClientHttpRequestInterceptor&gt; interceptors = new ArrayList&lt;&gt;();
 interceptors.add(new HttpHeaderInterceptor("Accept", MediaType.APPLICATION_JSON_VALUE));
 interceptors.add(new HttpHeaderInterceptor("ContentType", MediaType.APPLICATION_JSON_VALUE));
 interceptors.add(new HttpHeaderInterceptor("username", "user123"));
 interceptors.add(new HttpHeaderInterceptor("customHeader1", "c1"));
 interceptors.add(new HttpHeaderInterceptor("customHeader2", "c2"));
 // initialize RestTemplate
 RestTemplate restTemplate = new RestTemplate();
 // set header interceptors here
 restTemplate.setInterceptors(interceptors);
 // post the request. The response should be JSON string
 String response = restTemplate.postForObject(Url, someRequest, String.class);
 return response;
}
</code></pre>

blocks|key|7413|text|使用RestTemplate调用RESTful接口|type|unstyled|depth|inlineStyleRanges|entityRanges|data|7414|示例1：|7415|RestTemplate+restTemplate+=+new+RestTemplate();
//+Add+the+Jackson+message+converter
restTemplate.getMessageConverters()
++++++++++++++++.add(new+MappingJackson2HttpMessageConverter());
HttpHeaders+headers+=+new+HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.set("Authorization",+"Basic+XXXXXXXXXXXXXXXX=");
HttpEntity<String>+entity+=+new+HttpEntity<String>("parameters",+headers);
restTemplate.getInterceptors()
++++++++++++++++.add(new+BasicAuthorizationInterceptor(USERID,+PWORD));
String+requestJson+=+getRequetJson(Code,+emailAddr,+firstName,+lastName);
response+=+restTemplate.postForObject(URL,+requestJson,+MYObject.class);|code-block|syntax|javascript|7416|示例2：|7417|RestTemplate+restTemplate+=+new+RestTemplate();
String+requestJson+=+getRequetJson(code,+emil,+name,+lastName);
HttpHeaders+headers+=+new+HttpHeaders();
String+userPass+=+USERID+%2B+":"+%2B+PWORD;
String+authHeader+=
++++"Basic+"+%2B+Base64.getEncoder().encodeToString(userPass.getBytes());
headers.set(HttpHeaders.AUTHORIZATION,+authHeader);
headers.setContentType(MediaType.APPLICATION_JSON);
headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
HttpEntity<String>+request+=+new+HttpEntity<String>(requestJson,+headers);
ResponseEntity<MyObject>+responseEntity;
responseEntity+=
++++this.restTemplate.exchange(URI,+HttpMethod.POST,+request,+Object.class);
responseEntity.getBody()|7418|getRequestJson方法创建一个JSON对象：|offset|length|style|CODE|7419|private+String+getRequetJson(String+Code,+String+emailAddr,+String+name)+{
++++ObjectMapper+mapper+=+new+ObjectMapper();
++++JsonNode+rootNode+=+mapper.createObjectNode();
++++((ObjectNode)+rootNode).put("code",+Code);
++++((ObjectNode)+rootNode).put("email",+emailAdd);
++++((ObjectNode)+rootNode).put("firstName",+name);
++++String+jsonString+=+null;
++++try+{
++++++++jsonString+=+mapper.writerWithDefaultPrettyPrinter()
+++++++++++++++++++++++++++++++.writeValueAsString(rootNode);
++++}
++++catch+(JsonProcessingException+e)+{
++++++++e.printStackTrace();
++++}
++++return+jsonString;
}|7420|entityMap^0|0|0|0|0|0|0|E|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|X|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|Y|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|10|8|@]|9|@]|A|$G|H]]|$1|M|3|N|5|6|7|11|8|@$O|12|P|13|Q|R]]|9|@]|A|$]]|$1|S|3|T|5|F|7|14|8|@]|9|@]|A|$G|H]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

<h3>Calling a RESTful API using RestTemplate</h3>
Example 1:
<pre><code>RestTemplate restTemplate = new RestTemplate();
// Add the Jackson message converter
restTemplate.getMessageConverters()
 .add(new MappingJackson2HttpMessageConverter());
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_JSON);
headers.set(&quot;Authorization&quot;, &quot;Basic XXXXXXXXXXXXXXXX=&quot;);
HttpEntity&lt;String&gt; entity = new HttpEntity&lt;String&gt;(&quot;parameters&quot;, headers);
restTemplate.getInterceptors()
 .add(new BasicAuthorizationInterceptor(USERID, PWORD));
String requestJson = getRequetJson(Code, emailAddr, firstName, lastName);
response = restTemplate.postForObject(URL, requestJson, MYObject.class);
 
</code></pre>
Example 2:
<pre><code>RestTemplate restTemplate = new RestTemplate();
String requestJson = getRequetJson(code, emil, name, lastName);
HttpHeaders headers = new HttpHeaders();
String userPass = USERID + &quot;:&quot; + PWORD;
String authHeader =
 &quot;Basic &quot; + Base64.getEncoder().encodeToString(userPass.getBytes());
headers.set(HttpHeaders.AUTHORIZATION, authHeader);
headers.setContentType(MediaType.APPLICATION_JSON);
headers.setAccept(Collections.singletonList(MediaType.APPLICATION_JSON));
HttpEntity&lt;String&gt; request = new HttpEntity&lt;String&gt;(requestJson, headers);
ResponseEntity&lt;MyObject&gt; responseEntity;
responseEntity =
 this.restTemplate.exchange(URI, HttpMethod.POST, request, Object.class);
responseEntity.getBody()
</code></pre>
The <code>getRequestJson</code> method creates a JSON Object:
<pre><code>private String getRequetJson(String Code, String emailAddr, String name) {
 ObjectMapper mapper = new ObjectMapper();
 JsonNode rootNode = mapper.createObjectNode();
 ((ObjectNode) rootNode).put(&quot;code&quot;, Code);
 ((ObjectNode) rootNode).put(&quot;email&quot;, emailAdd);
 ((ObjectNode) rootNode).put(&quot;firstName&quot;, name);
 String jsonString = null;
 try {
 jsonString = mapper.writerWithDefaultPrettyPrinter()
 .writeValueAsString(rootNode);
 }
 catch (JsonProcessingException e) {
 e.printStackTrace();
 }
 return jsonString;
}
</code></pre>

blocks|key|7457|text|无需创建HttpHeaders的简短解决方案：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|7458|RequestEntity<Void>+request+=+RequestEntity.post(URI.create(url))
++++++++++++++++.accept(MediaType.APPLICATION_JSON)
++++++++++++++++.contentType(MediaType.APPLICATION_JSON)
++++++++++++++++//+any+other+headers
++++++++++++++++.header("PRIVATE-TOKEN",+"token")
++++++++++++++++.build();

ResponseEntity<String>+response+=+restTemplate.exchange(request,+String.class);
return+response.getBody();|code-block|syntax|javascript|7459|entityMap^0|4|B|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@$9|N|A|O|B|C]]|D|@]|E|$]]|$1|F|3|G|5|H|7|P|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|D|@]|E|$]]]|L|$]]

Short solution without <code>HttpHeaders</code> creating:
<pre><code>RequestEntity&lt;Void&gt; request = RequestEntity.post(URI.create(url))
 .accept(MediaType.APPLICATION_JSON)
 .contentType(MediaType.APPLICATION_JSON)
 // any other headers
 .header(&quot;PRIVATE-TOKEN&quot;, &quot;token&quot;)
 .build();

ResponseEntity&lt;String&gt; response = restTemplate.exchange(request, String.class);
return response.getBody();
</code></pre>

I want to set the value of the <code>Accept:</code> in a request I am making using Spring's <code>RestTemplate</code>.

Here is my Spring request handling code

<pre><code>@RequestMapping(
 value= "/uom_matrix_save_or_edit", 
 method = RequestMethod.POST,
 produces="application/json"
)
public @ResponseBody ModelMap uomMatrixSaveOrEdit(
 ModelMap model,
 @RequestParam("parentId") String parentId
){
 model.addAttribute("attributeValues",parentId);
 return model;
}
</code></pre>

and here is my Java REST client:

<pre><code>public void post(){
 MultiValueMap&lt;String, String&gt; params = new LinkedMultiValueMap&lt;String, String&gt;();
 params.add("parentId", "parentId");
 String result = rest.postForObject( url, params, String.class) ;
 System.out.println(result);
}
</code></pre>

This works for me; I get a JSON string from the server side.

My question is: how can I specify the <code>Accept:</code> header (e.g. <code>application/json</code>,<code>application/xml</code>, ... ) and request method (e.g. <code>GET</code>,<code>POST</code>, ... ) when I use RestTemplate?

How to set an "Accept:" header on Spring RestTemplate request?

身份验证

服务器

JSON

Java

我想在使用Spring的RestTemplate发出的请求中设置Accept:的值。下面是我的Spring请求处理代码@RequestMapping(    value= "/uom_matrix_save_or_edit",     method = RequestMethod.POST,    produces="...

问如何在Spring RestTemplate请求上设置"Accept:“头？
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