RestTemplate使用方式

我的：

（1）代码：

package com.test;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.http.ResponseEntity;
import org.springframework.stereotype.Component;
import org.springframework.web.client.RestTemplate;
import java.security.MessageDigest;
import java.util.Base64;

/**
 * @description 短信发送
 */
@Component
public class SmsUtils {

    @Value("${sms.url}")
    private String smsUrl;

    @Autowired
    RestTemplate restTemplate;

    /**
     * 根据手机号给手机发验证码
     */
    public boolean send(SmsBO bo) {
        try {
            //请求头
            HttpHeaders headers = new HttpHeaders();
            headers.setContentType(MediaType.APPLICATION_JSON);

            // 请求体
            bo.setMobiles("15626299333");
            HttpEntity<SmsBO> httpEntity = new HttpEntity<>(bo, headers);

            // 发送请求
            ResponseEntity<String> response = restTemplate.postForEntity(smsUrl, httpEntity, String.class);

            // 返回
            String body = response.getBody();
            System.out.println(body);
            JSONObject jsonBody = JSON.parseObject(body);
            Boolean flag = jsonBody.getBoolean("success");
            return flag;
        } catch (Exception e) {
            e.printStackTrace();
        }

        return false;
    }


    // base64加密
    private static String toBase64(String str)  throws Exception{
        return Base64.getEncoder().encodeToString(str.getBytes("utf8"));
    }

    // 转为 32位 小写的 MD5摘要
    private static String toMd5(String str) throws Exception {
        return encryptMode(str, "MD5");
    }

    // 转为 安全哈希算法 SHA
    private static String toSha(String str) throws Exception {
        return encryptMode(str, "SHA");
    }

    /**
     * 加密
     * @param str
     * @param model "MD5"、"SHA"、"SHA1"、"SHA-224".....
     */
    private static String encryptMode(String str, String model) throws Exception {
        MessageDigest md = MessageDigest.getInstance(model);
        // 更新
        md.update(str.getBytes("utf8"));
        // 获取
        byte[] bt = md.digest();
        // 转换
        StringBuffer buffer = new StringBuffer();
        for (int i = 0; i < bt.length; i++) {
            buffer.append(Character.forDigit((bt[i] & 240) >> 4, 16));
            buffer.append(Character.forDigit(bt[i] & 15, 16));
        }
        return buffer.toString();
    }

}