restTemplate常用方法

get请求样例：

/**
 * 获取token
 */
@PostMapping("/getToken")
public String getToken() {
    //从缓存获取
    String token= tokenManager.getToken();
    
    //重新拉取
    if (ObjectUtils.isEmpty(token)){
        //1.获取请求的url
        String url = arataUrl.concat("/users/login/");

        //声明请求头
        HttpHeaders headers=new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);

        //入参
        Map<String, Object> paramMap = new HashMap<>();
        paramMap.put("username", "admin");
        paramMap.put("password", "admin");
			
        //使用HttpEntity形式包装传递参数
        HttpEntity<Map> httpEntity=new HttpEntity<Map>(paramMap,headers);

        //2.调用接口
        String str = restTemplate.postForObject(url, httpEntity, String.class);
        JSONObject jsonObject= JSONObject.parseObject(str);

        //3.处理响应报文
        if (ObjectUtils.isNotEmpty(jsonObject)){
            ArataToken arataToken= JSON.parseObject(JSON.toJSONString(jsonObject), ArataToken.class);
            String temp= arataToken.getToken();
            if (ObjectUtils.isNotEmpty(temp)){
                tokenManager.setToken(temp);
                token= temp;
            }
        }
    }
		
    return token;
}

post请求样例：

/**
 * 按id获取详情
 * @param id
 * @return string
 */
@PostMapping("/did/getDidByHolderDid")
public String getById(@RequestParam String id) {

    String token= this.getToken();
    if (ObjectUtils.isEmpty(token)){
        log.info("获取token失败");
        return null;
    }

    //声明请求头
    HttpHeaders headers=new HttpHeaders();
    headers.setContentType(MediaType.APPLICATION_JSON);
    headers.add("Authorization", "Bearer "+ token);	//OAuth2.0验证

    Map<String, Object> paramMap = new HashMap<>();
    HttpEntity<Map> httpEntity=new HttpEntity<>(paramMap,headers);

    //1.获取请求的url
    String url = arataUrl.concat("/users/nfts/?holder_did=").concat(holder_did);

        //响应结果
        ResponseEntity<String> result = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);
    String ret= result.getBody();

    return ret;
}