Spring中RestTemplate的使用

Get请求

1:带参数的Get请求

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

//错误使用:

@Autowired
private RestOperations restOperations;

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

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

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

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

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");
}

2:Spring提供的Get请求方法

 T getForObject(String url, Class responseType, Object... uriVariables) throws RestClientException;

 T getForObject(String url, Class responseType, Map uriVariables) throws RestClientException;

 T getForObject(URI url, Class responseType) throws RestClientException;

 ResponseEntity getForEntity(String url, Class responseType, Object... uriVariables) throws RestClientException;

 ResponseEntity getForEntity(String url, Class responseType, Map uriVariables) throws RestClientException;

 ResponseEntity getForEntity(URI url, Class responseType) throws RestClientException;

Post请求

1:带参数的POST请求

带参数的URL示例:http://api.map.baidu.com/geodata/v3/poi/create

//正确使用:

        HttpHeaders headers = new HttpHeaders();
        MultiValueMap createPostParams = new LinkedMultiValueMap<>(16);
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        createPostParams.add("ak", PositionConstants.AK);
        createPostParams.add("geotable_id", PositionConstants.GEOTABLE_ID);
        createPostParams.add("coord_type", PositionConstants.COORD_TYPE);
        createPostParams.add("latitude", String.valueOf(article.getPositionX()));
        createPostParams.add("longitude", String.valueOf(article.getPositionY()));
        createPostParams.add("address", article.getPositionName());
        createPostParams.add("title", article.getArticleName());
        createPostParams.add("article_img", articleImg);
        createPostParams.add("article_id", article.getArticleId());
        createPostParams.add("article_title", article.getArticleName());
        createPostParams.add("article_time", String.valueOf(article.getArticleTime()));
        createPostParams.add("article_username", userName);
        HttpEntity> requestEntity = new HttpEntity<>(createPostParams, headers);


        ResponseEntity responseEntity = restTemplate.postForEntity(PositionConstants.CREATE_URL, requestEntity, String.class);

2:Spring提供的POST方法

 T postForObject(String url, Object request, Class responseType, Object... uriVariables)
			throws RestClientException;

 T postForObject(String url, Object request, Class responseType, Map uriVariables)
			throws RestClientException;

 T postForObject(URI url, Object request, Class responseType) throws RestClientException;

 ResponseEntity postForEntity(String url, Object request, Class responseType, Object... uriVariables)
			throws RestClientException;

` ResponseEntity postForEntity(String url, Object request, Class responseType, Map uriVariables)
			throws RestClientException;`
 ResponseEntity postForEntity(URI url, Object request, Class responseType) throws RestClientException;`

PUT请求:

PUT请求和POST请求差不多.

2:Spring提供的PUT方法

void put(String url, Object request, Object... uriVariables) throws RestClientException;

void put(String url, Object request, Map uriVariables) throws RestClientException;

void put(URI url, Object request) throws RestClientException;

DELETE请求:

1:Spring提供的DELETE方法

void delete(String url, Object... uriVariables) throws RestClientException;

void delete(String url, Map uriVariables) throws RestClientException;

void delete(URI url) throws RestClientException;