Java 此代码提供错误

我不明白如何解决这个问题。我已经添加了所有必需的jar。

您的项目中有不兼容版本的

http core

和

unirest java

。

我已经包含了“http core 4.2.3和unirest java 1.4.7”。嘿，Jens，我已经包含了jar文件。现在，错误更改为“线程中的异常”main“java.lang.NoClassDefFoundError:org/apache/http/client/methods/HttpGet，位于com.mashape.unirest.request.BaseRequest.asJson（BaseRequest.java:68），位于ActOn.getAccessToken（ActOn.java:56），位于ActOn.main（ActOn.java:21）原因：java.lang.ClassNotFoundException:org.apache.http.client.methods.HttpGet位于java.net.URLClassLoader$1.run（未知源）位于java.net.URLClassLoader$1.run（未知源）位于java.security.AccessController.doPrivileged（本机方法）@AbhimanyuJha您的http客户端版本也应该是版本4.3I添加的http-client4.3，但错误与“java.lang.NoClassDefFoundError:org/apache/http/client/methods/HttpGet at com.mashape.unirest.request.BaseRequest.asJson”相同。您是将其添加到类路径还是仅添加到构建路径？

 import org.apache.http.entity.ContentType;
 import org.json.JSONException;
 import com.mashape.unirest.http.HttpResponse;
 import com.mashape.unirest.http.JsonNode;
 import com.mashape.unirest.http.Unirest;
 import com.mashape.unirest.http.exceptions.UnirestException;

 public class ActOn {

  static String BASE_URL = "https://restapi.actonsoftware.com/";
  static String ACTON_USERNAME = "";
  static String ACTON_PASSWORD = "";
  static String CLIENT_ID = "";
  static String CLIENT_SECRET = "";

  public static void main(String[] args) throws JSONException {
   try {
    String access_token = getAccessToken();
    Unirest.setDefaultHeader("Authorization", "Bearer " + access_token);
    printListCount();
   } catch (UnirestException e) {
    e.printStackTrace();
   }
  }

  private static void printListCount() throws UnirestException, JSONException {
   HttpResponse < JsonNode > listResponse = Unirest.get(BASE_URL + "/api/1/list").asJson();
   System.out.println("Total number of lists : " + listResponse.getBody().getObject().getInt("totalCount"));
  }
  private static String getAccessToken() throws UnirestException, JSONException {
   HttpResponse < JsonNode > jsonResponse = Unirest.post(BASE_URL + "token")
    .header("accept", "application/json")
    .field("grant_type", "password")
    .field("username", ACTON_USERNAME)
    .field("password", ACTON_PASSWORD)
    .field("client_id", CLIENT_ID)
    .field("client_secret", CLIENT_SECRET)
    .asJson();
   return jsonResponse.getBody().getObject().getString("access_token");

  }
 }

Exception in thread "main" java.lang.NoSuchMethodError: org.apache.http.entity.ContentType.withCharset(Ljava/lang/String;)Lorg/apache/http/entity/ContentType;
    at com.mashape.unirest.request.body.MultipartBody.field(MultipartBody.java:107)
    at com.mashape.unirest.request.body.MultipartBody.field(MultipartBody.java:73)
    at com.mashape.unirest.request.HttpRequestWithBody.field(HttpRequestWithBody.java:95)
    at com.mashape.unirest.request.HttpRequestWithBody.field(HttpRequestWithBody.java:87)
    at ActOn.getAccessToken(ActOn.java:48)
    at ActOn.main(ActOn.java:20)