如何使用HttpClient

发布于 2024-10-22 01:07:00 字数 453 浏览 2 评论 0原文

我目前正在尝试使用 java 中的以下代码通过“uri”获取一些数据：

HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet(uri);
        HttpResponse response = client.execute(get);
        HttpEntity entity = response.getEntity();
        if(entity != null){
            InputStream stream = entity.getContent();
            callString = stream.toString();
            return callString;
        }

但这不起作用。有谁知道我在这里做错了什么？

原文

I'm currently trying to get some data via a 'uri' using the following code in java:

HttpClient client = new DefaultHttpClient();
        HttpGet get = new HttpGet(uri);
        HttpResponse response = client.execute(get);
        HttpEntity entity = response.getEntity();
        if(entity != null){
            InputStream stream = entity.getContent();
            callString = stream.toString();
            return callString;
        }

However this isn't working. Does anyone know what I'm doing wrong here?

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落日海湾 2024-10-29 01:07:00

您不能像那样打印出输入流...相反，请执行以下操作：-

    HttpClient client = new DefaultHttpClient();
    HttpGet get = new HttpGet("http://ichart.finance.yahoo.com/table.csv?s=MSFT");
    HttpResponse response = client.execute(get);
    HttpEntity entity = response.getEntity();
    if (entity != null) {
        Scanner scanner = new Scanner(entity.getContent());
        while (scanner.hasNextLine()) {
            System.out.println(scanner.nextLine());
        }
    }

打印输出如下所示：-

1994-02-02,84.75,85.50,84.00,84.00,40924800,2.09
1994-02-01,85.00,85.75,84.50,85.12,44003200,2.12
1994-01-31,85.25,85.87,84.75,85.12,62566400,2.12
1994-01-28,84.50,85.50,84.25,84.87,41875200,2.11
1994-01-27,84.00,84.75,83.25,84.25,51129600,2.10
1994-01-26,85.00,85.00,84.00,84.25,50489600,2.10
1994-01-25,85.25,85.37,84.00,85.12,70361600,2.12
...

You cannot print out the input stream like that... instead, do something like this:-

    HttpClient client = new DefaultHttpClient();
    HttpGet get = new HttpGet("http://ichart.finance.yahoo.com/table.csv?s=MSFT");
    HttpResponse response = client.execute(get);
    HttpEntity entity = response.getEntity();
    if (entity != null) {
        Scanner scanner = new Scanner(entity.getContent());
        while (scanner.hasNextLine()) {
            System.out.println(scanner.nextLine());
        }
    }

The printout looks like this:-

1994-02-02,84.75,85.50,84.00,84.00,40924800,2.09
1994-02-01,85.00,85.75,84.50,85.12,44003200,2.12
1994-01-31,85.25,85.87,84.75,85.12,62566400,2.12
1994-01-28,84.50,85.50,84.25,84.87,41875200,2.11
1994-01-27,84.00,84.75,83.25,84.25,51129600,2.10
1994-01-26,85.00,85.00,84.00,84.25,50489600,2.10
1994-01-25,85.25,85.37,84.00,85.12,70361600,2.12
...

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救赎№ 2024-10-29 01:07:00

这完全是猜测，但不应该是：

String uri = "ichart.finance.yahoo.com/table.csv?s=MSFT"

HttpData data = HttpRequest.get(uri);
System.out.println(data.content);

Its a total guess but shouldn't it be:

String uri = "ichart.finance.yahoo.com/table.csv?s=MSFT"

HttpData data = HttpRequest.get(uri);
System.out.println(data.content);

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金橙橙 2024-10-29 01:07:00

您正在尝试下载文件，并且 getEntity 用于获取您指定类型的对象。恕我直言，这行不通。

您需要编写能够实际读取响应流并从中读取内容的代码...

您想做什么？

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只是一片海 2024-10-29 01:07:00

要将生成的实体读取为字符串，请使用 EntityUtils.toString(HttpEntity) 或 EntityUtils.toString(HttpEntity, String) 如果您知道字符集。

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小猫一只 2024-10-29 01:07:00

如果您收到 NetworkOnMainThreadException 那么这意味着您正在调用 client.execute(get);在主线程上，这是在 Honeycomb 及更高版本上抛出的异常。请参阅http://developer.android.com/reference/android/os/NetworkOnMainThreadException。 html 了解详细信息。解决方案是在新线程中运行它。

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