我正在使用Postman来测试api链接,我的回复是一个图像,如下所示:
我写了一些这样的http get代码来调用api:
HttpClient httpClient = HttpClientBuilder.create().build();
byte[] encodedBytes = Base64.getEncoder().encode("kermit:kermit".getBytes());
HttpGet request = new HttpGet("http://127.0.0.1:8080/activiti-rest/service/runtime/process-instances/" +processInstanceId +"/diagram");
request.setHeader("Authorization", "Basic " + encodedBytes)
request.addHeader("content-type", "image/png");
HttpResponse response = httpClient.execute(request);
现在我想将该图像下载到我的硬盘中的特定路径。我在这里搜索了一些帖子,但这不是我预期的结果。你能帮助我吗?谢谢!
首先,您不能将字节数组添加到String:
request.setHeader("Authorization", "Basic " + encodedBytes);
你可以尝试这样的事情:
request.setHeader("Authorization", "Basic " + new String(encodedBytes, "UTF-8"));
你必须抓住或扔掉UnsupportedEncodingException
。
其次,你不应该设置content-type
标头。你可能想要使用Accept
标题。
获得响应后,您可以将OutputStream
的内容保存到文件中,或者随意执行任何操作。
你可以试试这个
HttpClient httpClient = HttpClientBuilder.create().build();
HttpGet request = new HttpGet("http://127.0.0.1:8080/activiti-rest/service/runtime/process-instances/" +processInstanceId +"/diagram");
request.addHeader("content-type", "image/png");
try (CloseableHttpResponse response = client.execute(request)) {
HttpEntity entity = response.getEntity();
if (entity != null) {
try (FileOutputStream outstream = new FileOutputStream(new File("download-image.png"),StandardCharsets.UTF_8)) {
entity.writeTo(outstream);
}
}
}