发送http请求携带MultipartFile参数

原创已于 2024-03-14 09:14:09 修改 · 1.4k 阅读

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#http #网络协议 #java

于 2024-03-14 09:11:24 首次发布

本文介绍了如何在Java中使用ApacheHttpClient库发送一个带有文件附件的MultipartHTTPPOST请求，并处理服务器响应，包括设置accessToken头和解析返回的JSON数据。

String url = "http://xxxxxxxxxxxxxxx";//服务端要调用的外部接口
CloseableHttpClient httpClient = HttpClients.createDefault();
try {
    HttpPost httpPost = new HttpPost(url);

    File file = new File(address);

    MultipartEntityBuilder builder = MultipartEntityBuilder.create();
    builder.addBinaryBody("file", file, ContentType.parse("image/jpeg"), file.getName());

    HttpEntity multipart = builder.build();
    httpPost.setEntity(multipart);

    // 添加 'accessToken' 请求头 访问需要带token则携带token
    httpPost.setHeader("accessToken", accessToken);

    CloseableHttpResponse response = httpClient.execute(httpPost);
    try {
        int statusCode = response.getStatusLine().getStatusCode();
        // 打印响应结果
        if (statusCode == HttpStatus.SC_OK) {
            Gson gson = new Gson();
            String resp = EntityUtils.toString(response.getEntity(), "utf-8");
            MyResponse myResponse = gson.fromJson(resp, MyResponse.class);
            System.out.println("status:" + statusCode);
            System.out.println("result:" + resp);
            return myResponse.result;
        }

        System.out.println(response.getStatusLine());
        HttpEntity responseEntity = response.getEntity();
        EntityUtils.consume(responseEntity);
    } finally {
        response.close();
    }
} catch (ClientProtocolException e) {
    e.printStackTrace();
} catch (IOException e) {
    e.printStackTrace();
} finally {
    try {
        httpClient.close();
    } catch (IOException e) {
        e.printStackTrace();
    }
}
return null;

//响应结果体

static class MyResponse {
    boolean success;
    String message;
    int code;
    long timestamp;
    String result;
}