Rest Assured：发出请求返回错误“JSON输入文本既不应为null也不应为空”。

Question

我是REST-Api测试的新手。我开始使用Rest-Assured进行Rest-Api测试，我对此有疑问。以下是继续返回上述错误的代码

import static io.restassured.RestAssured.given;
import static org.hamcrest.Matchers.equalTo;
import files.resources;
import java.io.FileInputStream;
import java.io.IOException;
import java.util.Properties;
import org.testng.annotations.BeforeTest;
import org.testng.annotations.Test;
import io.restassured.RestAssured;
import io.restassured.http.ContentType;
import io.restassured.path.json.JsonPath;
import io.restassured.response.Response;

public class Basics3 {

    Properties prop = new Properties();

    @BeforeTest
    public void getData() throws IOException{

        FileInputStream fis = new FileInputStream("C:\Users\boma.dagogo\Desktop\BOMA DAGOGO\eclipse-workspace\DemoProject\src\files\env.properties");
        prop.load(fis);
        //prop.get("HOST");
    }

    @Test
    public void addandDeletePlace() {

        String b = "{
" +
                "    "location":{
" +
                "        "lat" : -38.383494,
" +
                "        "lng" : 33.427362
" +
                "    },
" +
                "    "accuracy":50,
" +
                "    "name":"Frontline house",
" +
                "    "phone_number":"(+91) 983 893 3937",
" +
                "    "address" : "29, side layout, cohen 09",
" +
                "    "types": ["shoe park","shop"],
" +
                "    "website" : "http://google.com",
" +
                "    "language" : "French-IN"
" +
                "}";

        RestAssured.baseURI = prop.getProperty("HOST");
        Response res = given().
                queryParam("key", " qaclick123").
                body(b).
                when().
                post(resources.placePostData()).
                then().assertThat().statusCode(200).and().contentType(ContentType.JSON).and().
                body("status", equalTo("OK")).
                extract().response();

        //Task 2: Grab the place_id from the response

        String responseString = res.asString();
        System.out.println(responseString);

        JsonPath js = new JsonPath(responseString);
        js.get("place_id");

        String place_id = js.get("place_id");
        System.out.println(place_id);

        //Task 3: Place this place_id in the Delete request
        given().
                queryParam("key", prop.getProperty("KEY")).
                body("{" +
                        ""place_id":"" + place_id + """ +
                        "}").
                when().
                post("/maps/api/place/delete/json").
                then().assertThat().statusCode(200).and().contentType(ContentType.JSON).and().
                body("status", equalTo("OK"));

    }

}