从我的表单中发布参数数据非常有效,但我需要使用 JSON 发布相同的信息。如何才能做到这一点。我的表格看起来像这样。
<form enctype="multipart/form-data" method="post" action="http://myrestfulservice.com/">
<input type="text" name="name">
<input type="text" name="email">
<textarea name="about" rows="3"></textarea>
<input name="file" type="file">
</form>
我的 JSON 字符串看起来像这样。
{
"name":"Josh U",
"email":"xxx@gmail.com",
"about":"Get rich programming or die tryna be something else",
"file":"@/home/josh/image.png"
}
我曾尝试使用该 JSON 字符串,但我得到以下
Exception in thread "main" java.lang.RuntimeException: Failed : HTTP error code : 500
at com.ijoshluisaac.restful.client.RESTFulClientPostUsingJavaHTTPClientLibrary.main(RESTFulClientPostUsingJavaHTTPClientLibrary.java:35)
我的 JAVA 代码看起来像这样
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 RESTFulClientPostUsingJavaHTTPClientLibrary {
// JSON content to post
private static final String JSON_OBJECT = "{\"name\":\"Josh U\",\"email\":\"xxx@gmail.com\",\"about\":\"Get rich programming or die tryna be something else\",\"file\":\"/home/josh/image.png\"}";
//Web services URLs
private static final String URL_SR = "http://myrestfulservice.com/";
public static void main(String[] args) {
try {
URL url = new URL(URL_SR);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setDoOutput(true);
conn.setRequestMethod("POST");
conn.setRequestProperty("Content-Type", "application/json");
OutputStream os = conn.getOutputStream();
os.write(JSON_OBJECT.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("Successfully Executed RESTFul POST .... \n");
while ((output = br.readLine()) != null) {
System.out.println(output);
}
conn.disconnect();
} catch (MalformedURLException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}