RestTemplate 发送 get 请求使用误区 多值为null

http://blog.csdn.net/zhousenshan/article/details/71055687

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首先看一下官方文档是怎么描述的，传递多个值的情况(注意例子中用到的@pathParam,一般要用@queryParam)

RestTemplate 实例

guration
public class RestConfiguration {

@Bean
@ConditionalOnMissingBean({RestOperations.class, RestTemplate.class})
public RestOperations restOperations() {
SimpleClientHttpRequestFactory requestFactory = new SimpleClientHttpRequestFactory();
requestFactory.setReadTimeout(5000);
requestFactory.setConnectTimeout(5000);

RestTemplate restTemplate = new RestTemplate(requestFactory);

// 使用 utf-8 编码集的 conver 替换默认的 conver（默认的 string conver 的编码集为 "ISO-8859-1"）
List<HttpMessageConverter<?>> messageConverters = restTemplate.getMessageConverters();
Iterator<HttpMessageConverter<?>> iterator = messageConverters.iterator();
while (iterator.hasNext()) {
HttpMessageConverter<?> converter = iterator.next();
if (converter instanceof StringHttpMessageConverter) {
iterator.remove();
}
}
messageConverters.add(new StringHttpMessageConverter(Charset.forName("UTF-8")));

return restTemplate;

请求地址

get 请求 url 为

/localhost:8080/test/sendSms?phone=手机号&msg=短信内容

错误使用

ired
private RestOperations restOperations;

public void test() throws Exception{
String url = "http://localhost:8080/test/sendSms";

Map<String, Object> uriVariables = new HashMap<String, Object>();
uriVariables.put("phone", "151xxxxxxxx");
uriVariables.put("msg", "测试短信内容");

String result = restOperations.getForObject(url, String.class, uriVariables);

服务器接收的时候你会发现，接收的该请求时没有参数的

正确使用

ired
private RestOperations restOperations;

public void test() throws Exception{
String url = "http://localhost:8080/test/sendSms?phone={phone}&msg={phone}";

Map<String, Object> uriVariables = new HashMap<String, Object>();
uriVariables.put("phone", "151xxxxxxxx");
uriVariables.put("msg", "测试短信内容");

String result = restOperations.getForObject(url, String.class, uriVariables);

等价于
ired
private RestOperations restOperations;

public void test() throws Exception{
String url = "http://localhost:8080/test/sendSms?phone={phone}&msg={phone}";

String result = restOperations.getForObject(url, String.class, "151xxxxxxxx", "测试短信内容");