相关疑难解决方法(0)

我试着写出URLConnection#getOutputStream,然而,在我打电话之前,实际上没有数据被发送URLConnection#getInputStream.即使我设置URLConnnection#doInput为false,它仍然不会发送.有人知道为什么吗？API文档中没有任何内容可以描述这一点.

URLConnection上的Java API文档:http://download.oracle.com/javase/6/docs/api/java/net/URLConnection.html

Java的读取和编写URLConnection的教程:http://download.oracle.com/javase/tutorial/networking/urls/readingWriting.html

import java.io.IOException;
import java.io.OutputStreamWriter;
import java.net.URL;
import java.net.URLConnection;

public class UrlConnectionTest {

    private static final String TEST_URL = "http://localhost:3000/test/hitme";

    public static void main(String[] args) throws IOException  {

        URLConnection urlCon = null;
        URL url = null;
        OutputStreamWriter osw = null;

        try {
            url = new URL(TEST_URL);
            urlCon = url.openConnection();
            urlCon.setDoOutput(true);
            urlCon.setRequestProperty("Content-Type", "text/plain");            

            ////////////////////////////////////////
            // SETTING THIS TO FALSE DOES NOTHING //
            ////////////////////////////////////////
            // urlCon.setDoInput(false);

            osw …