Java Http Url连接错误

我得到以下错误：

java.lang.IllegalStateException: Target host must not be null, or set in parameters. scheme=null, host=null, path=CONNECT_URL

以下是我的全局变量：

String CONNECT_URL = "http://api.openweathermap.org/data/2.5/weather?q=Mumbai";
    int LAST_INDEX; 
    String NAME; 
    String TYPE; 
    String GREETING_YEAR; 
    String GREETING_GENERAL; 
    String RADIO_TYPE;
    InputStream ins = null;
    String result = null; 

以下是我的解析函数：

public void parse(){
        DefaultHttpClient http = new DefaultHttpClient(new BasicHttpParams()); 
        System.out.println("URL is: "+CONNECT_URL); 
        HttpPost httppost = new HttpPost("CONNECT_URL");
        httppost.setHeader("Content-type", "application/json");
        try{
            HttpResponse resp = http.execute(httppost); 
            HttpEntity entity = resp.getEntity();
            ins = entity.getContent(); 
            BufferedReader bufread = new BufferedReader(new InputStreamReader(ins, "UTF-8"), 8); 
            StringBuilder sb = new StringBuilder(); 
            String line = null; 

            while((line = bufread.readLine()) != null){

                sb.append(line +"\n"); 

            }
            result = sb.toString(); 
            System.out.println("Result: "+result); 

        }catch (Exception e){
            System.out.println("Error: "+e);
        }finally{
            try{
                if(ins != null){
                    ins.close();
                }
            }catch(Exception squish){
                System.out.println("Squish: "+squish); 
            }
        }



    }

我试着用其他类似的问题来重构它，但我的URL似乎没问题，一旦我从浏览器中检查相同的URL，它就会返回JSON，有什么提示吗

你有

HttpPost httppost = new HttpPost("CONNECT_URL");

看看你的代码应该是这样的

HttpPost httppost = new HttpPost(CONNECT_URL);

你有

HttpPost httppost = new HttpPost("CONNECT_URL");

看看你的代码应该是这样的

HttpPost httppost = new HttpPost(CONNECT_URL);

您正在HttpPost对象中传递“CONNECT\uURL”，这是错误的。使用

HttpPost httppost = new HttpPost(CONNECT_URL) //instead of HttpPost("CONNECT_URL")

您正在HttpPost对象中传递“CONNECT\uURL”，这是错误的。使用

HttpPost httppost = new HttpPost(CONNECT_URL) //instead of HttpPost("CONNECT_URL")

应该是

HttpPost httppost = new HttpPost(CONNECT_URL);

作为旁注，Java约定规定变量为驼峰大小写（

connectUrl

），常量为大写（

CONNECT\uURL

）

应该是

HttpPost httppost = new HttpPost(CONNECT_URL);

---

作为旁注，Java约定规定变量为驼峰大小写（

connectUrl

），常量为大写（

CONNECT\URL

）。

我认为问题来自这一行：

HttpPost httppost = new HttpPost("CONNECT_URL");

---

您正在传递字符串

“CONNECT\u URL”

而不是传递变量

CONNECT\u URL

：）

我认为问题来自这一行：

HttpPost httppost = new HttpPost("CONNECT_URL");

---

您正在传递字符串

“CONNECT\u URL”

而不是传递变量

CONNECT\u URL

：）

谢谢您的友好提示，我一定会更改它：）谢谢您的友好提示，我一定会更改它：）