如何在java中构建RESTful请求
我试图理解如何向服务器发送REST请求。如果我必须在java中使用httpconnections或任何其他连接将其实现为请求,我将如何实现如何在java中构建RESTful请求,java,rest,http,Java,Rest,Http,我试图理解如何向服务器发送REST请求。如果我必须在java中使用httpconnections或任何其他连接将其实现为请求,我将如何实现 POST /resource/1 Host: myownHost DATE: date Content-Type: some standard type 应该如何以标准的方式来构建 URL url= new URL("http://myownHost/resource/1"); HttpsURLConnec
POST /resource/1
Host: myownHost
DATE: date
Content-Type: some standard type
应该如何以标准的方式来构建
URL url= new URL("http://myownHost/resource/1");
HttpsURLConnection connect= (HttpsURLConnection) url.openConnection();
connect.setRequestMethod("POST");
connect.setRequestProperty("Host", "myOwnHost");
connect.setRequestProperty("Date","03:14:15 03:14:15 GMT");
connect.setRequestProperty("Content-Type","application/x-www-form-urlencoded");
您应该在这里使用
json
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStream;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;
public class NetClientPost {
// http://localhost:8080/RESTfulExample/json/product/post
public static void main(String[] args) {
try {
URL url = new URL("http://myownHost/resource/1");
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
String input = "{\"DATE\":\"03:14:15 03:14:15 GMT\",\"host\":\"myownhost\"}";
OutputStream os = conn.getOutputStream();
os.write(input.getBytes());
os.flush();
if (conn.getResponseCode() != HttpURLConnection.HTTP_CREATED) {
throw new RuntimeException("Failed : HTTP error code : "
+ conn.getResponseCode());
}
BufferedReader br = new BufferedReader(new InputStreamReader(
(conn.getInputStream())));
String output;
System.out.println("Output from Server .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
更多信息浏览有很多选项,ApacheHTTP客户端()就是其中之一(并且使事情变得非常简单) 创建REST请求可以如此简单(在本例中使用JSON):
更新:很抱歉,文档链接已更新。发布了新的链接。有几种方法可以使用Java调用RESTful服务,但不需要使用原始级别的API;-) 它存在一些RESTful框架,如Restlet或JAX-RS。它们同时处理客户端和服务器端,旨在隐藏此类调用的技术管道。下面是一个代码示例,描述如何使用Restlet和JSON解析器进行处理:
JSONObject jsonObj = new JSONObject();
jsonObj.put("host", "...");
ClientResource cr = new Client("http://myownHost/resource/1");
cr.post(new JsonRepresentation(jsonObject);
// In the case of form
// Form form = new Form ();
// form.set("host", "...");
// cr.post(form);
您可以注意到,在前面的代码段中,标题内容类型
,日期
是根据您发送的内容(表单、JSON等)自动设置的
否则,要添加一个元素,您应该使用元素列表资源(http://myownHost/resources/
)或方法PUT
,如果您有要用于标识它的唯一标识符(http://myownHost/resources/1
)。此链接可能对您有用:
希望它能帮助你,
Thierry通常让http客户端(即URL类)设置“主机”和“日期”头。除非您想特别覆盖这些值。
JSONObject jsonObj = new JSONObject();
jsonObj.put("host", "...");
ClientResource cr = new Client("http://myownHost/resource/1");
cr.post(new JsonRepresentation(jsonObject);
// In the case of form
// Form form = new Form ();
// form.set("host", "...");
// cr.post(form);