删除资源
public static void delete (String urlString, String contentType) throws IOException {
HttpURLConnection connection = null;
try {
URL url = new URL(urlString);
connection = (HttpURLConnection) url.openConnection();
connection.setDoInput(true);
connection.setRequestMethod("DELETE");
connection.setRequestProperty("Content-Type", contentType);
Map<String, List<String>> map = connection.getHeaderFields();
StringBuilder sb = new StringBuilder();
Iterator<Map.Entry<String, String>> iterator = responseHeader.entrySet().iterator();
while(iterator.hasNext())
{
Map.Entry<String, String> entry = iterator.next();
sb.append(entry.getKey());
sb.append('=').append('"');
sb.append(entry.getValue());
sb.append('"');
if(iterator.hasNext())
{
sb.append(',').append(' ');
}
}
System.out.println(sb.toString());
} catch (Exception e) {
e.printStackTrace();
} finally {
if (connection != null) connection.disconnect();
}
}
这将删除指定 URL 中的资源,然后打印响应头。
这个怎么运作
- 我们从
URL
获得HttpURLConnection
。 - 使用
setRequestProperty
设置内容类型,默认情况下是application/x-www-form-urlencoded
setDoInput(true)
告诉连接我们打算使用 URL 连接进行输入。setRequestMethod("DELETE")
执行 HTTP DELETE
最后我们打印服务器响应头。