JAVA表單的測試

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/*
 * JAVASE 表單的測試，這裡沒有使用大多數使用廣泛的jsp和servlet等等
 * */
package post;


import java.io.IOException;
import java.io.InputStream;
import java.io.PrintWriter;
import java.net.HttpURLConnection;
import java.net.URL;
import java.net.URLConnection;
import java.net.URLEncoder;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.util.Map;
import java.util.Properties;
import java.util.Scanner;


public class PostTest {


public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
Properties props = new Properties();
try(InputStream in = Files.newInputStream(Paths.get(args[0]))){
props.load(in);
}

try {
String url = props.remove("url").toString();
String result;
result = doPost(url, props);
System.out.println(result);
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}

}

public static String doPost(String urlString, Map<Object, Object> nameValuePairs) throws IOException{
URL url = new URL(urlString);
URLConnection connection = url.openConnection();
connection.setDoOutput(true);
try(PrintWriter out = new PrintWriter(connection.getOutputStream())){
boolean first = true;
for(Map.Entry<Object, Object> pair : nameValuePairs.entrySet()){
if(first)
first = false;
else
out.print(‘&‘);
String name = pair.getKey().toString();
String value = pair.getValue().toString();
out.print(name);
out.print(‘=‘);
out.print(URLEncoder.encode(value, "UTF-8"));

}

}

StringBuilder response = new StringBuilder();
try(Scanner in = new Scanner(connection.getInputStream())){
while(in.hasNextLine()){
response.append(in.nextLine());
response.append("\n");
}
}catch(IOException e){
if(!(connection instanceof HttpURLConnection)) 
throw e;
InputStream err = ((HttpURLConnection) connection).getErrorStream();
if(err == null)
throw e;
Scanner in = new Scanner(err);
response.append(in.nextLine());
response.append("\n");
}
return response.toString();
}


}

JAVA表單的測試