RestTemplate发送POST请求

RestTemplate发送POST请求

在java后端实现发送Http的post请求，做个记录

1.首先创建一个对请求返回数据进行处理的类

public class ResultVO<T> {

    private Integer code;

    private String message;

    private T data;

    public ResultVO() {
    }

    public ResultVO(Integer code, String message) {
        this.code = code;
        this.message = message;
    }

    public ResultVO(Integer code, String message, T data) {
        this.code = code;
        this.message = message;
        this.data = data;
    }

    public Integer getCode() {
        return code;
    }

    public void setCode(Integer code) {
        this.code = code;
    }

    public String getMessage() {
        return message;
    }

    public void setMessage(String message) {
        this.message = message;
    }

    public T getData() {
        return data;
    }

    public void setData(T data) {
        this.data = data;
    }
    
}
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2.发送请求（post+params）

public class MyUtils {

    /**
     * 向目的URL发送post请求
     * @param url       目的url
     * @param params    发送的参数
     * @return  ResultVO
     */
     //a.以表单方式提交
    public static ResultVO sendPostRequest(String url, MultiValueMap<String, String> params){
        RestTemplate client = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        HttpMethod method = HttpMethod.POST;
        // 以表单的方式提交
        headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
        //将请求头部和参数合成一个请求
        HttpEntity<MultiValueMap<String, String>> requestEntity = new HttpEntity<>(params, headers);
        //执行HTTP请求，将返回的结构使用ResultVO类格式化
        ResponseEntity<ResultVO> response = client.exchange(url, method, requestEntity, ResultVO.class);

        return response.getBody();
    }

	//b.以json方式提交
	public static ResultVO sendPostRequest1(String url, Map<String, Object> params){
        RestTemplate restTemplate = new RestTemplate();
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.APPLICATION_JSON);
        
        HttpEntity entity = new HttpEntity(params, headers);
        
        ResultVO response = restTemplate.postForObject(url, entity, ResultVO.class);
        
        return response;
    }

}
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3.具体使用

private ResultVO setShelveData(String sensorCode, String temperature,String humidity) {
		
		String url = "http://xxxx/api/setShelveData";
		MultiValueMap<String, String> params = new LinkedMultiValueMap<>();
	    params.add("sensorCode", sensorCode);
	    params.add("temperature", temperature);
	    params.add("humidity", humidity);
	    
	    //发送Post数据并返回数据
	    ResultVO resultVo = MyUtils.sendPostRequest(url, params);
		return resultVo;
	}
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转载于：https://blog.csdn.net/zai_xia/article/details/80926157 http://www.manongjc.com/article/38034.html