blocks|key|502963|text|好吧，我是个笨蛋，我把查询参数和url参数搞混了。我有点希望有一种更好的方法来填充我的查询参数，而不是一个丑陋的连接字符串，但我们就是这样。这只是一个用正确的参数构建URL的例子。如果您将其作为字符串传递，Spring还将为您处理编码。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|502964|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

OK, so I'm being an idiot and I'm confusing query parameters with url parameters. I was kinda hoping there would be a nicer way to populate my query parameters rather than an ugly concatenated String but there we are. It's simply a case of build the URL with the correct parameters. If you pass it as a String Spring will also take care of the encoding for you.

blocks|key|502994|text|uriVariables也会在查询字符串中展开。例如，下面的调用将扩展account和name的值：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|502995|restTemplate.exchange("http://my-rest-url.org/rest/account/{account}?name={name}",
++++HttpMethod.GET,
++++httpEntity,
++++clazz,
++++"my-account",
++++"my-name"
);|code-block|syntax|javascript|502996|因此，实际的请求url将是|502997|http://my-rest-url.org/rest/account/my-account?name=my-name|502998|有关更多详细信息，请查看HierarchicalUriComponents.expandInternal(UriTemplateVariables)。Spring的版本是3.1.3。|502999|entityMap^0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|O|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Q|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|R|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|S|8|@]|9|@]|A|$]]|$1|M|3|-4|5|6|7|T|8|@]|9|@]|A|$]]]|N|$]]

The uriVariables are also expanded in the query string. For example, the following call will expand values for both, account and name:

<pre><code>restTemplate.exchange("http://my-rest-url.org/rest/account/{account}?name={name}",
 HttpMethod.GET,
 httpEntity,
 clazz,
 "my-account",
 "my-name"
);
</code></pre>

so the actual request url will be

<pre><code>http://my-rest-url.org/rest/account/my-account?name=my-name
</code></pre>

Look at HierarchicalUriComponents.expandInternal(UriTemplateVariables) for more details.
Version of Spring is 3.1.3.

blocks|key|719130|text|我也在尝试类似的方法，而the+RoboSpice+example+helped+me+work+it+out|type|unstyled|depth|inlineStyleRanges|entityRanges|offset|length|data|719131|HttpHeaders+headers+=+new+HttpHeaders();
headers.set("Accept",+"application/json");

HttpEntity<String>+request+=+new+HttpEntity<>(input,+createHeader());

String+url+=+"http://awesomesite.org";
Uri.Builder+uriBuilder+=+Uri.parse(url).buildUpon();
uriBuilder.appendQueryParameter(key,+value);
uriBuilder.appendQueryParameter(key,+value);
...

String+url+=+uriBuilder.build().toString();

HttpEntity<String>+response+=+restTemplate.exchange(url,+HttpMethod.GET,+request+,+String.class);|code-block|syntax|javascript|719132|entityMap|0|LINK|mutability|MUTABLE|url|https://github.com/octo-online/RoboSpice-samples/blob/release/robospice-sample-spring-android/src/com/octo/android/robospice/sample/springandroid/TweetsRequest.java^0|C|17|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@]|9|@$A|R|B|S|1|T]]|C|$]]|$1|D|3|E|5|F|7|U|8|@]|9|@]|C|$G|H]]|$1|I|3|-4|5|6|7|V|8|@]|9|@]|C|$]]]|J|$K|$5|L|M|N|C|$O|P]]]]

I was attempting something similar, and <a href="https://github.com/octo-online/RoboSpice-samples/blob/release/robospice-sample-spring-android/src/com/octo/android/robospice/sample/springandroid/TweetsRequest.java" rel="noreferrer">the RoboSpice example helped me work it out</a>:

<pre><code>HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/json");

HttpEntity&lt;String&gt; request = new HttpEntity&lt;&gt;(input, createHeader());

String url = "http://awesomesite.org";
Uri.Builder uriBuilder = Uri.parse(url).buildUpon();
uriBuilder.appendQueryParameter(key, value);
uriBuilder.appendQueryParameter(key, value);
...

String url = uriBuilder.build().toString();

HttpEntity&lt;String&gt; response = restTemplate.exchange(url, HttpMethod.GET, request , String.class);
</code></pre>

blocks|key|719170|text|要轻松操作URL+/路径/参数等，您可以使用Spring类创建一个带有参数占位符的UriComponentsBuilder模板，然后在RestOperations.exchange(...)调用中提供这些参数的值。它比手动连接字符串更干净，而且它会为您处理URL编码：|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|719171|HttpHeaders+headers+=+new+HttpHeaders();
headers.set(HttpHeaders.ACCEPT,+MediaType.APPLICATION_JSON_VALUE);
HttpEntity<?>+entity+=+new+HttpEntity<>(headers);

String+urlTemplate+=+UriComponentsBuilder.fromHttpUrl(url)
++++++++.queryParam("msisdn",+"{msisdn}")
++++++++.queryParam("email",+"{email}")
++++++++.queryParam("clientVersion",+"{clientVersion}")
++++++++.queryParam("clientType",+"{clientType}")
++++++++.queryParam("issuerName",+"{issuerName}")
++++++++.queryParam("applicationName",+"{applicationName}")
++++++++.encode()
++++++++.toUriString();

Map<String,+?>+params+=+new+HashMap<>();
params.put("msisdn",+msisdn);
params.put("email",+email);
params.put("clientVersion",+clientVersion);
params.put("clientType",+clientType);
params.put("issuerName",+issuerName);
params.put("applicationName",+applicationName);

HttpEntity<String>+response+=+restOperations.exchange(
++++++++urlTemplate,
++++++++HttpMethod.GET,
++++++++entity,
++++++++String.class,
++++++++params
);|code-block|syntax|javascript|719172|entityMap|0|LINK|mutability|MUTABLE|url|https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/util/UriComponentsBuilder.html^0|1V|S|15|K|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@$9|T|A|U|B|C]]|D|@$9|V|A|W|1|X]]|E|$]]|$1|F|3|G|5|H|7|Y|8|@]|D|@]|E|$I|J]]|$1|K|3|-4|5|6|7|Z|8|@]|D|@]|E|$]]]|L|$M|$5|N|O|P|E|$Q|R]]]]

To easily manipulate URLs / path / params / etc., you can use Spring's <a href="https://docs.spring.io/spring/docs/current/javadoc-api/org/springframework/web/util/UriComponentsBuilder.html" rel="nofollow noreferrer">UriComponentsBuilder</a> class to create a URL template with placehoders for the parameters, then provide the value for those parameters in the <code>RestOperations.exchange(...)</code> call. It's cleaner than manually concatenating strings and it takes care of the URL encoding for you:
<pre><code>HttpHeaders headers = new HttpHeaders();
headers.set(HttpHeaders.ACCEPT, MediaType.APPLICATION_JSON_VALUE);
HttpEntity&lt;?&gt; entity = new HttpEntity&lt;&gt;(headers);

String urlTemplate = UriComponentsBuilder.fromHttpUrl(url)
 .queryParam(&quot;msisdn&quot;, &quot;{msisdn}&quot;)
 .queryParam(&quot;email&quot;, &quot;{email}&quot;)
 .queryParam(&quot;clientVersion&quot;, &quot;{clientVersion}&quot;)
 .queryParam(&quot;clientType&quot;, &quot;{clientType}&quot;)
 .queryParam(&quot;issuerName&quot;, &quot;{issuerName}&quot;)
 .queryParam(&quot;applicationName&quot;, &quot;{applicationName}&quot;)
 .encode()
 .toUriString();

Map&lt;String, ?&gt; params = new HashMap&lt;&gt;();
params.put(&quot;msisdn&quot;, msisdn);
params.put(&quot;email&quot;, email);
params.put(&quot;clientVersion&quot;, clientVersion);
params.put(&quot;clientType&quot;, clientType);
params.put(&quot;issuerName&quot;, issuerName);
params.put(&quot;applicationName&quot;, applicationName);

HttpEntity&lt;String&gt; response = restOperations.exchange(
 urlTemplate,
 HttpMethod.GET,
 entity,
 String.class,
 params
);
</code></pre>

blocks|key|503103|text|我采取了不同的方法，你可能同意或不同意，但我希望从.properties文件而不是编译的Java代码进行控制|type|unstyled|depth|inlineStyleRanges|entityRanges|data|503104|application.properties文件内部|503105|endpoint.url+=+https://yourHost/resource?requestParam1={0}&requestParam2={1}|offset|length|503106|你可以写if或switch条件来找出.properties文件中的端点URL是否有@PathVariable+(包含{})或@RequestParam+(yourURL?key=value)等……然后相应地调用方法...这样它是动态的，并且不需要在未来的一站式商店中更改代码……|503107|我试图在这里给出比实际代码更多的想法，为@+...try和@PathVariable等编写泛型方法。然后在需要时进行相应的调用|503108|++@Value("${endpoint.url}")
++private+String+endpointURL;
++//+you+can+use+variable+args+feature+in+Java
++public+String+requestParamMethodNameHere(String+value1,+String+value2)+{
++++RestTemplate+restTemplate+=+new+RestTemplate();
++++restTemplate
+++++++++++.getMessageConverters()
+++++++++++.add(new+MappingJackson2HttpMessageConverter());

++++HttpHeaders+headers+=+new+HttpHeaders();
++++headers.set("Accept",+MediaType.APPLICATION_JSON_VALUE);
++++HttpEntity<String>+entity+=+new+HttpEntity<>(headers);

++++try+{
++++++String+formatted_URL+=+MessageFormat.format(endpointURL,+value1,+value2);
++++++ResponseEntity<String>+response+=+restTemplate.exchange(
++++++++++++++++++++formatted_URL+,
++++++++++++++++++++HttpMethod.GET,
++++++++++++++++++++entity,
++++++++++++++++++++String.class);
+++++return+response.getBody();
++++}+catch+(Exception+e)+{+e.printStackTrace();+}|code-block|syntax|javascript|503109|entityMap|0|LINK|mutability|MUTABLE|url|https://yourhost/resource?requestParam1=^0|0|0|F|14|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Y|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|Z|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|10|8|@]|9|@$F|11|G|12|1|13]]|A|$]]|$1|H|3|I|5|6|7|14|8|@]|9|@]|A|$]]|$1|J|3|K|5|6|7|15|8|@]|9|@]|A|$]]|$1|L|3|M|5|N|7|16|8|@]|9|@]|A|$O|P]]|$1|Q|3|-4|5|6|7|17|8|@]|9|@]|A|$]]]|R|$S|$5|T|U|V|A|$W|X]]]]

I take different approach, you may agree or not but I want to control from .properties file instead of compiled Java code

<h1>Inside application.properties file</h1>

endpoint.url = <a href="https://yourHost/resource?requestParam1=" rel="nofollow">https://yourHost/resource?requestParam1=</a>{0}&amp;requestParam2={1}

Java code goes here, you can write if or switch condition to find out if endpoint URL in .properties file has @PathVariable (contains {}) or @RequestParam (yourURL?key=value) etc... then invoke method accordingly... that way its dynamic and not need to code change in future one stop shop... 

I'm trying to give more of idea than actual code here ...try to write generic method each for @RequestParam, and @PathVariable etc... then call accordingly when needed 

<pre><code> @Value("${endpoint.url}")
 private String endpointURL;
 // you can use variable args feature in Java
 public String requestParamMethodNameHere(String value1, String value2) {
 RestTemplate restTemplate = new RestTemplate();
 restTemplate
 .getMessageConverters()
 .add(new MappingJackson2HttpMessageConverter());

 HttpHeaders headers = new HttpHeaders();
 headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
 HttpEntity&lt;String&gt; entity = new HttpEntity&lt;&gt;(headers);

 try {
 String formatted_URL = MessageFormat.format(endpointURL, value1, value2);
 ResponseEntity&lt;String&gt; response = restTemplate.exchange(
 formatted_URL ,
 HttpMethod.GET,
 entity,
 String.class);
 return response.getBody();
 } catch (Exception e) { e.printStackTrace(); }
</code></pre>

blocks|key|503128|text|public+static+void+main(String[]+args)+{
+++++++++HttpHeaders+httpHeaders+=+new+HttpHeaders();
+++++++++httpHeaders.set("Accept",+MediaType.APPLICATION_JSON_VALUE);
+++++++++final+String+url+=+"https://host:port/contract/{code}";
+++++++++Map<String,+String>+params+=+new+HashMap<String,+String>();
+++++++++params.put("code",+"123456");
+++++++++HttpEntity<?>+httpEntity++=+new+HttpEntity<>(httpHeaders);+
+++++++++RestTemplate+restTemplate++=+new+RestTemplate();
+++++++++restTemplate.exchange(url,+HttpMethod.GET,+httpEntity,String.class,+params);
++++}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|503129|unstyled|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|G|8|@]|9|@]|A|$B|C]]|$1|D|3|-4|5|E|7|H|8|@]|9|@]|A|$]]]|F|$]]

<pre><code>public static void main(String[] args) {
 HttpHeaders httpHeaders = new HttpHeaders();
 httpHeaders.set("Accept", MediaType.APPLICATION_JSON_VALUE);
 final String url = "https://host:port/contract/{code}";
 Map&lt;String, String&gt; params = new HashMap&lt;String, String&gt;();
 params.put("code", "123456");
 HttpEntity&lt;?&gt; httpEntity = new HttpEntity&lt;&gt;(httpHeaders); 
 RestTemplate restTemplate = new RestTemplate();
 restTemplate.exchange(url, HttpMethod.GET, httpEntity,String.class, params);
 }
</code></pre>

blocks|key|719276|text|如果您为RestTemplate传递非参数化的参数，那么考虑到参数，您将为您传递的每个不同的URL使用一个指标。您希望使用参数化的urls：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|719277|http://my-url/action?param1={param1}&param2={param2}|code-block|syntax|javascript|719278|而不是|719279|http://my-url/action?param1=XXXX&param2=YYYY|719280|第二种情况是使用UriComponentsBuilder类得到的结果。|719281|实现第一种行为的一种方法如下：|719282|Map<String,+Object>+params+=+new+HashMap<>();
params.put("param1",+"XXXX");
params.put("param2",+"YYYY");

String+url+=+"http://my-url/action?%25s";

String+parametrizedArgs+=+params.keySet().stream().map(k+->
++++String.format("%25s={%25s}",+k,+k)
).collect(Collectors.joining("&"));

HttpHeaders+headers+=+new+HttpHeaders();
headers.set("Accept",+MediaType.APPLICATION_JSON_VALUE);
HttpEntity<String>+entity+=+new+HttpEntity<>(headers);

restTemplate.exchange(String.format(url,+parametrizedArgs),+HttpMethod.GET,+entity,+String.class,+params);|719283|entityMap^0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|S|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|T|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|U|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|V|8|@]|9|@]|A|$E|F]]|$1|K|3|L|5|6|7|W|8|@]|9|@]|A|$]]|$1|M|3|N|5|6|7|X|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|Y|8|@]|9|@]|A|$E|F]]|$1|Q|3|-4|5|6|7|Z|8|@]|9|@]|A|$]]]|R|$]]

If you pass non-parametrized params for RestTemplate, you'll have one Metrics for everyone single different URL that you pass, considering the parameters. You would like to use parametrized urls:

<pre><code>http://my-url/action?param1={param1}&amp;param2={param2}
</code></pre>

instead of

<pre><code>http://my-url/action?param1=XXXX&amp;param2=YYYY
</code></pre>

The second case is what you get by using UriComponentsBuilder class.

One way to implement the first behavior is the following:

<pre><code>Map&lt;String, Object&gt; params = new HashMap&lt;&gt;();
params.put("param1", "XXXX");
params.put("param2", "YYYY");

String url = "http://my-url/action?%s";

String parametrizedArgs = params.keySet().stream().map(k -&gt;
 String.format("%s={%s}", k, k)
).collect(Collectors.joining("&amp;"));

HttpHeaders headers = new HttpHeaders();
headers.set("Accept", MediaType.APPLICATION_JSON_VALUE);
HttpEntity&lt;String&gt; entity = new HttpEntity&lt;&gt;(headers);

restTemplate.exchange(String.format(url, parametrizedArgs), HttpMethod.GET, entity, String.class, params);
</code></pre>

blocks|key|719337|text|在Spring+Web+4.3.6中，我还看到|type|unstyled|depth|inlineStyleRanges|entityRanges|data|719338|public+<T>+T+getForObject(String+url,+Class<T>+responseType,+Object...+uriVariables)|code-block|syntax|javascript|719339|这意味着你不必创建一个丑陋的地图|719340|所以如果你有这个url|719341|http://my-url/action?param1={param1}&param2={param2}|719342|你可以这样做|719343|restTemplate.getForObject(url,+Response.class,+param1,+param2)|719344|或|719345|restTemplate.getForObject(url,+Response.class,+param+[])|719346|entityMap^0|0|0|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|X|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|Y|8|@]|9|@]|A|$]]|$1|I|3|J|5|6|7|Z|8|@]|9|@]|A|$]]|$1|K|3|L|5|D|7|10|8|@]|9|@]|A|$E|F]]|$1|M|3|N|5|6|7|11|8|@]|9|@]|A|$]]|$1|O|3|P|5|D|7|12|8|@]|9|@]|A|$E|F]]|$1|Q|3|R|5|6|7|13|8|@]|9|@]|A|$]]|$1|S|3|T|5|D|7|14|8|@]|9|@]|A|$E|F]]|$1|U|3|-4|5|6|7|15|8|@]|9|@]|A|$]]]|V|$]]

In Spring Web 4.3.6 I also see

<pre><code>public &lt;T&gt; T getForObject(String url, Class&lt;T&gt; responseType, Object... uriVariables)
</code></pre>

That means you don't have to create an ugly map

So if you have this url

<pre><code>http://my-url/action?param1={param1}&amp;param2={param2}
</code></pre>

You can either do

<pre><code>restTemplate.getForObject(url, Response.class, param1, param2)
</code></pre>

or

<pre><code>restTemplate.getForObject(url, Response.class, param [])
</code></pre>

blocks|key|503331|text|将散列映射转换为查询参数字符串：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|503332|Map<String,+String>+params+=+new+HashMap<>();
params.put("msisdn",+msisdn);
params.put("email",+email);
params.put("clientVersion",+clientVersion);
params.put("clientType",+clientType);
params.put("issuerName",+issuerName);
params.put("applicationName",+applicationName);

UriComponentsBuilder+builder+=+UriComponentsBuilder.fromHttpUrl(url);
for+(Map.Entry<String,+String>+entry+:+params.entrySet())+{
++++builder.queryParam(entry.getKey(),+entry.getValue());
}

HttpHeaders+headers+=+new+HttpHeaders();
headers.set("Accept",+"application/json");

HttpEntity<String>+response+=+restTemplate.exchange(builder.toUriString(),+HttpMethod.GET,+new+HttpEntity(headers),+String.class);|code-block|syntax|javascript|503333|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|$]]

Converting of a hash map to a string of query parameters:

<pre class="lang-java prettyprint-override"><code>Map&lt;String, String&gt; params = new HashMap&lt;&gt;();
params.put("msisdn", msisdn);
params.put("email", email);
params.put("clientVersion", clientVersion);
params.put("clientType", clientType);
params.put("issuerName", issuerName);
params.put("applicationName", applicationName);

UriComponentsBuilder builder = UriComponentsBuilder.fromHttpUrl(url);
for (Map.Entry&lt;String, String&gt; entry : params.entrySet()) {
 builder.queryParam(entry.getKey(), entry.getValue());
}

HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/json");

HttpEntity&lt;String&gt; response = restTemplate.exchange(builder.toUriString(), HttpMethod.GET, new HttpEntity(headers), String.class);
</code></pre>

blocks|key|503370|text|如果您的url是http://localhost:8080/context+path?msisdn={msisdn}&email={email}|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|503371|然后|503372|Map<String,Object>+queryParams=new+HashMap<>();
queryParams.put("msisdn",your+value)
queryParams.put("email",your+value)|code-block|syntax|javascript|503373|适用于您所描述的resttemplate交换方法|503374|entityMap^0|8|1S|0|0|0|0^^$0|@$1|2|3|4|5|6|7|Q|8|@$9|R|A|S|B|C]]|D|@]|E|$]]|$1|F|3|G|5|6|7|T|8|@]|D|@]|E|$]]|$1|H|3|I|5|J|7|U|8|@]|D|@]|E|$K|L]]|$1|M|3|N|5|6|7|V|8|@]|D|@]|E|$]]|$1|O|3|-4|5|6|7|W|8|@]|D|@]|E|$]]]|P|$]]

If your url is <code>http://localhost:8080/context path?msisdn={msisdn}&amp;email={email}</code>

then 

<pre><code>Map&lt;String,Object&gt; queryParams=new HashMap&lt;&gt;();
queryParams.put("msisdn",your value)
queryParams.put("email",your value)
</code></pre>

works for resttemplate exchange method as described by you

blocks|key|719463|text|我提供了一个带有路径参数示例的RestTemplate+GET方法的代码片段|type|unstyled|depth|inlineStyleRanges|entityRanges|data|719464|public+ResponseEntity<String>+getName(int+id)+{
++++final+String+url+=+"http://localhost:8080/springrestexample/employee/name?id={id}";
++++Map<String,+String>+params+=+new+HashMap<String,+String>();
++++params.put("id",+id);
++++HttpHeaders+headers+=+new+HttpHeaders();
++++headers.setContentType(MediaType.APPLICATION_JSON);
++++HttpEntity+request+=+new+HttpEntity(headers);
++++ResponseEntity<String>+response+=+restTemplate.exchange(url,+HttpMethod.GET,+String.class,+params);
++++return+response;
}|code-block|syntax|javascript|719465|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|$]]

I am providing a code snippet of RestTemplate GET method with path param example
<pre><code>public ResponseEntity&lt;String&gt; getName(int id) {
 final String url = &quot;http://localhost:8080/springrestexample/employee/name?id={id}&quot;;
 Map&lt;String, String&gt; params = new HashMap&lt;String, String&gt;();
 params.put(&quot;id&quot;, id);
 HttpHeaders headers = new HttpHeaders();
 headers.setContentType(MediaType.APPLICATION_JSON);
 HttpEntity request = new HttpEntity(headers);
 ResponseEntity&lt;String&gt; response = restTemplate.exchange(url, HttpMethod.GET, String.class, params);
 return response;
}
</code></pre>

I have to make a <code>REST</code> call that includes custom headers and query parameters. I set my <code>HttpEntity</code> with just the headers (no body), and I use the <code>RestTemplate.exchange()</code> method as follows:

<pre><code>HttpHeaders headers = new HttpHeaders();
headers.set("Accept", "application/json");

Map&lt;String, String&gt; params = new HashMap&lt;String, String&gt;();
params.put("msisdn", msisdn);
params.put("email", email);
params.put("clientVersion", clientVersion);
params.put("clientType", clientType);
params.put("issuerName", issuerName);
params.put("applicationName", applicationName);

HttpEntity entity = new HttpEntity(headers);

HttpEntity&lt;String&gt; response = restTemplate.exchange(url, HttpMethod.GET, entity, String.class, params);
</code></pre>

This fails at the client end with the <code>dispatcher servlet</code> being unable to resolve the request to a handler. Having debugged it, it looks like the request parameters are not being sent.

When I do a an exchange with a <code>POST</code> using a request body and no query parameters it works just fine.

Does anyone have any ideas?

Spring RestTemplate GET with parameters

我必须进行一个包含自定义头和查询参数的REST调用。我只使用头(没有正文)设置HttpEntity，并使用RestTemplate.exchange()方法，如下所示：HttpHeaders headers = new HttpHeaders();headers.set("Accept", "application/j...

问带参数的Spring RestTemplate GET
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