![](https://img.laitimes.com/img/9ZDMuAjOiMmIsIjOiQnIsICM38FdsYkRGZkRG9lcvx2bjxiNx8VZ6l2cs0TPn5EeRpWTxEFVOBDOsJGcohVYsR2MMBjVtJWd0ckW65UbM5WOHJWa5kHT20ESjBjUIF2X0hXZ0xCMx81dvRWYoNHLrdEZwZ1Rh5WNXp1bwNjW1ZUba9VZwlHdssmch1mclRXY39CXldWYtlWPzNXZj9mcw1ycz9WL49zZuBnLxczN4MzM0ETMzIzMwEjMwIzLc52YucWbp5GZzNmLn9Gbi1yZtl2Lc9CX6MHc0RHaiojIsJye.png)
1.先引用pom.xml依賴
<dependency>
<groupId>com.alibaba</groupId>
<artifactId>fastjson</artifactId>
<version>1.2.72</version>
</dependency>
這邊是JSONObject的包用來處理參數和傳回值,RestTemplate 不需要單獨引jar包,Springboot自己內建了
2.我這邊隻寫了POST請求的代碼
import com.alibaba.fastjson.JSONObject;
import org.springframework.http.HttpEntity;
import org.springframework.http.HttpHeaders;
import org.springframework.http.MediaType;
import org.springframework.web.client.RestTemplate;
public class RestTemplateUtil {
public static JSONObject sendPostRequest(String url, JSONObject params) {
// 第一步 建立模闆
RestTemplate restTemplate = new RestTemplate();
// 請求頭部
HttpHeaders headers = new HttpHeaders();
// 送出方式
// post請求體為body,是以我們這邊傳json
// 是以傳參格式也必須為json
headers.setContentType(MediaType.APPLICATION_JSON);
// 将請求頭部和參數合成一個請求
HttpEntity<JSONObject> requestEntity = new HttpEntity<JSONObject>(params, headers);
JSONObject response = restTemplate.postForObject(url, requestEntity, JSONObject.class);
return response;
}
public static void main(String[] args) {
// 對方API路徑
String url = "http://192.168.1.57:3444/api/token";
// 參數
JSONObject params = new JSONObject();
params.put("username", "admin");
params.put("password", "123456");
JSONObject userInfo = sendPostRequest(url, params);
System.out.println("api調用成功,jwtToken是:"+userInfo.get("jwtToken"));
}
}