RestTemplate 发送get、put、post 请求

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最新推荐文章于 2025-04-29 16:32:08 发布

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分类专栏： Java

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本文详细介绍了如何使用Spring的RestTemplate发送GET、PUT和POST请求，包括设置请求头、处理响应和异常情况。对于理解HTTP请求在Java中的实现具有重要价值。

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RestTemplate 发送get、put、post 请求

/**
     * 发送请求Get请求
     *
     * @param url   请求接口
     * @param param 请求参数
     */
    private JSONObject sendGet(String url, JSONObject param) {
        JSONObject jsonObject = null;
        try {
            //设置请求头
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_JSON);
            HttpEntity httpEntity = new HttpEntity<>(param, headers);
            ResponseEntity<String> resEntity = restTemplate.exchange(url, HttpMethod.GET, httpEntity, String.class);
            jsonObject = JSON.parseObject(resEntity.getBody());
        } catch (Exception e) {
            if (e.toString().contains("timed out")) {
                throw new ThirdException(EnumThirdCode.E_CONTRACT, "调用超时，请重试");
            }
            throw new ThirdException(EnumThirdCode.E_CONTRACT, "接口异常");
        }
        return jsonObject;
    }
    
    /**
     * 发送请求Put请求
     *
     * @param url   请求接口
     * @param param 请求参数
     */
    private JSONObject sendPut(String url, JSONObject param) {
        JSONObject jsonObject = null;
        try {
            //设置请求头
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_JSON);
            HttpEntity httpEntity = new HttpEntity<>(param, headers);
            ResponseEntity<String> resEntity = restTemplate.exchange(url, HttpMethod.PUT, httpEntity, String.class);
            jsonObject = JSON.parseObject(resEntity.getBody());
        } catch (Exception e) {
            if (e.toString().contains("timed out")) {
                throw new ThirdException(EnumThirdCode.E_CONTRACT, "调用超时，请重试");
            }
            throw new ThirdException(EnumThirdCode.E_CONTRACT, "接口异常");
        }
        return jsonObject;
    }

 /**
     * 发送请求Post请求
     *
     * @param url   请求接口
     * @param param 请求参数
     */
    private JSONObject sendPost(String url, JSONObject param) {
        JSONObject jsonObject = null;
        try {
            //设置请求头
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_JSON);
            HttpEntity httpEntity = new HttpEntity<>(param, headers);
            jsonObject = restTemplate.postForObject(url, httpEntity, JSONObject.class);
        } catch (Exception e) {
            if (e.toString().contains("timed out")) {
                throw new ThirdException(EnumThirdCode.E_CONTRACT, "调用超时，请重试");
            }
            throw new ThirdException(EnumThirdCode.E_CONTRACT, "接口异常");
        }
        return jsonObject;
    }