类型列表不是通用的;它不能与参数进行参数[了HTTPClient] [英] The type List is not generic; it cannot be parameterized with arguments [HTTPClient]

问题描述

 进口java.awt.List中;
进口java.awt.image.BufferedImage中;
进口java.io.BufferedReader中;
进口java.io.ByteArrayOutputStream中;
进口的java.io.File;
进口java.io.InputStreamReader中;
进口的java.util.ArrayList;进口javax.imageio.ImageIO中;进口org.apache.commons codec.binary.Base64。
进口org.apache.http.Htt presponse;
进口org.apache.http.client.HttpClient;
进口org.apache.http.client.entity.UrlEn codedFormEntity;
进口org.apache.http.client.methods.HttpPost;
进口org.apache.http.impl.client.DefaultHttpClient;
进口org.apache.http.message.BasicNameValuePair;
进口org.omg.DynamicAny.NameValuePair;公共类上传{    公共静态无效的主要（字串[] args）{        的System.out.println（Imgur（C：\\\\ \\\\用户名\\\\ \\\\桌面image.jpg文件，clientID的））;
    }公共静态字符串Imgur（IMAGEDIR字符串，字符串clientID的）{
    //创造必要的字符串
    字符串的地址=htt​​ps://api.imgur.com/3/image;    //创建了HTTPClient和后
    HttpClient的客户端=新DefaultHttpClient（）;
    HttpPost后=新HttpPost（地址）;    //创建的base64形象
    BufferedImage的图像= NULL;
    档案文件=新的文件（IMAGEDIR）;    尝试{
        //读取图像
        图像= ImageIO.read（文件）;
        ByteArrayOutputStream的字节数组=新ByteArrayOutputStream（）;
        ImageIO.write（形象，PNG，字节）;
        字节[] = byteImage byteArray.toByteArray（）;
        字符串dataImage =新的Base64（）带codeAsString（byteImage）。        //添加标题
        post.addHeader（授权，客户ID+ clientID的）;
        //添加图片
        清单＆LT;＆的NameValuePair GT; namevaluepairs中=新的ArrayList＆LT;＆的NameValuePair GT;（1）;
        nameValuePairs.add（新BasicNameValuePair（形象，dataImage））;
        post.setEntity（新UrlEn codedFormEntity（namevaluepairs中））;        //执行
        HTT presponse响应= client.execute（岗位）;        //读取响应
        RD的BufferedReader =新的BufferedReader（新的InputStreamReader（response.getEntity（）的getContent（）））;
        字符串的所有= NULL;        //通过响应循环
        而（rd.readLine（）！= NULL）{
            所有的一切= +：+ rd.readLine（）;
        }        返回所有;    }
    赶上（例外五）{
        返回error：+ e.toString（）;
    }
}
}
 

所以我有code和我是从<一个href=\"http://stackoverflow.com/questions/14710247/uploading-to-imgur-v3-using-java-https-errors\">uploading到Imgur V3使用Java HTTPS错误和我得到50行错误的列表告诉我，

  

类型列表不是通用的;它不能与自变量进行参数设置。

我能做些什么来解决这个问题？

我使用 http://hc.apache.org/httpclient-3.x/ 并要上传图片用他们的V3 API来imgur。

编辑：更改导入之后，我现在得到这些错误

。

这是解决了，但给我的两个错误。

  nameValuePairs.add（新BasicNameValuePair（形象，dataImage））;
 

  

在类型列表方法Add（的NameValuePair）不适用于参数（BasicNameValuePair）

和

post.setEntity（新UrlEn codedFormEntity（namevaluepairs中））;

  

构造UrlEn codedFormEntity（列表）未定义

解决方案

您输入有一个微妙的错误：

 进口java.awt.List中;
 

它应该是：

 进口的java.util.List;
 

问题是，无论 AWT 和Java的util包提供了一个名为类列表。前者是一个显示单元，后者是集合使用泛型类型。此外，的java.util.ArrayList 扩展的java.util.List 的不的 java.awt.List中的，所以如果它不是为仿制药，它会仍然是一个问题。

编辑：（适用于解决OP给出进一步的问题）作为回答您的评论，似乎还有的花药的微妙的进口问题。

 进口org.omg.DynamicAny.NameValuePair;
 

应

 进口org.apache.http.NameValuePair
 

namevaluepairs中现在使用正确的泛型类型参数，为新UrlEn codedFormEntity ，通用参数，该参数为名单，LT ;?扩展的NameValuePair＆GT; ，成为有效的，因为的您的的NameValuePair现在是一样的及其的的NameValuePair。之前， org.omg.DynamicAny.NameValuePair <​​/ code>没有延伸 org.apache.http.NameValuePair <​​/ code>和缩短的类型名称的NameValuePair <​​/ code>评估，以<​​code> org.omg ... 在你的文件，但 org.apache。 .. 在他们的code。

import java.awt.List;
import java.awt.image.BufferedImage;
import java.io.BufferedReader;
import java.io.ByteArrayOutputStream;
import java.io.File;
import java.io.InputStreamReader;
import java.util.ArrayList;

import javax.imageio.ImageIO;

import org.apache.commons.codec.binary.Base64;
import org.apache.http.HttpResponse;
import org.apache.http.client.HttpClient;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.omg.DynamicAny.NameValuePair;

public class Upload {

    public static void main (String[] args) {

        System.out.println(Imgur("C:\\Users\\username\\Desktop\\image.jpg",     "clientID"));
    }

public static String Imgur (String imageDir, String clientID) {
    //create needed strings
    String address = "https://api.imgur.com/3/image";

    //Create HTTPClient and post
    HttpClient client = new DefaultHttpClient();
    HttpPost post = new HttpPost(address);

    //create base64 image
    BufferedImage image = null;
    File file = new File(imageDir);

    try {
        //read image
        image = ImageIO.read(file);
        ByteArrayOutputStream byteArray = new ByteArrayOutputStream();
        ImageIO.write(image, "png", byteArray);
        byte[] byteImage = byteArray.toByteArray();
        String dataImage = new Base64().encodeAsString(byteImage);

        //add header
        post.addHeader("Authorization", "Client-ID" + clientID);
        //add image
        List<NameValuePair> nameValuePairs = new ArrayList<NameValuePair>(1);
        nameValuePairs.add(new BasicNameValuePair("image", dataImage));
        post.setEntity(new UrlEncodedFormEntity(nameValuePairs));

        //execute
        HttpResponse response = client.execute(post);

        //read response
        BufferedReader rd = new BufferedReader(new         InputStreamReader(response.getEntity().getContent()));
        String all = null;

        //loop through response
        while (rd.readLine() != null) {
            all = all + " : " + rd.readLine(); 
        }

        return all;

    }
    catch (Exception e){
        return "error: " + e.toString();
    }
}
}

So I have that code and I got it from uploading to Imgur v3 using Java https errors and I get an error on line 50 for "List" telling me

The type List is not generic; it cannot be parameterized with arguments

What can I do to solve this?

I'm using http://hc.apache.org/httpclient-3.x/ and want to upload an image to imgur using their v3 API.

EDIT: After changing the import I now get these errors.

That solves that but give me two more errors.

nameValuePairs.add(new BasicNameValuePair("image", dataImage));

The method add(NameValuePair) in the type List is not applicable for the arguments (BasicNameValuePair)

And

post.setEntity(new UrlEncodedFormEntity(nameValuePairs));

The constructor UrlEncodedFormEntity(List) is undefined

解决方案

Your import has a subtle error:

import java.awt.List;

It should be:

import java.util.List;

The problem is that both awt and Java's util package provide a class called List. The former is a display element, the latter is a generic type used with collections. Furthermore, java.util.ArrayList extends java.util.List, not java.awt.List so if it wasn't for the generics, it would have still been a problem.

Edit: (to address further questions given by OP) As an answer to your comment, it seems that there is anther subtle import issue.

import org.omg.DynamicAny.NameValuePair;

should be

import org.apache.http.NameValuePair

nameValuePairs now uses the correct generic type parameter, the generic argument for new UrlEncodedFormEntity, which is List<? extends NameValuePair>, becomes valid, since your NameValuePair is now the same as their NameValuePair. Before, org.omg.DynamicAny.NameValuePair did not extend org.apache.http.NameValuePair and the shortened type name NameValuePair evaluated to org.omg... in your file, but org.apache... in their code.

这篇关于类型列表不是通用的;它不能与参数进行参数[了HTTPClient]的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！