urlconnection example

Network Programming (2) -- connect the parent class URLConnection and urlconnectionIn network programming (1), we learned that if you want to access resources of other hosts, you need to know the URL of the resource. If we know the URL, how can we access resources on the host? This article focuses on the basic parent class URLConnectiion of Android Network Programming in Java, which uses URLs to access host resources, the features of each subclass fur

URLConnection call interface, urlconnection call Preface: 　The project is a java web, jdk1.4, weblogic 7, and other. net system, using the interface developed by wcf. The other party provides the interface url address and description for calling in post mode, and directly returns the json array (data in json array format) without passing parameters) There are many methods to call interfaces, such as framewo

Use URL and urlconnection (multi-thread download) 17.2.3 use URL and urlconnection The URL (Uniform Resource Locator) object represents a unified resource locator, which is a pointer to the Internet "resource. A resource can be a simple file or directory, or a reference to a more complex object, such as a query of a database or search engine. Generally, a URL consists of a protocol name, host, po

The OpenConnection () method of the URL returns a URLConnection object that represents the communication connection between the application and the URL. A program can send a request to the URL through an URLConnection instance to read the resource referenced by the URLtypically creating a connection to a URL and sending a request, reading the resource referenced by this URL requires the following steps：

Detailed description of urlconnection parameters in JDK From: http://www.blogjava.net/supercrsky/articles/247449.htmlFor the issue of connecting servlet with urlconnection in JDK, although there are some problems on the internet, it only illustrates one or several problems, which are solved by FAQ and scattered, now I will summarize the usage experience of this class in the project as follows: 1:> URL reque

from this connection. example, (Simple page crawl) method one: OpenStream ()URL url=new url ("http://www.cnblogs.com/Downtime/p/7822379.html");InputStream Conn=url.openstream ();InputStreamReader read=new InputStreamReader (conn, "Utf-8");BufferedReader bread=new BufferedReader (read);while (bread.readline () = null) {System.out.println (Bread.readline ());} conn.close (); Method Two: URLConnectionURL url=new url ("http://www.cnblogs.com/Downtime/p/7

In Java network programming let us get a network address resources, we often use the URL Uniform Resource Locator (uniform Resource Locator), URL class Java.net.URL. The URL is defined as follows: [Scheme :] scheme-specific-part[ # Fragment] where the square brackets [...] are used to describe optional components, characters : and # represent themselves. View the API for more information. A, URL The main methods are as follows: 1. Construction method The URL (string spec) creates a URL object

The openconnection method of the URL returns a urlconnection, which indicates the communication connection between the application and the URL. The program can send a request to the URL through its instance to read the resources referenced by the URL. The following is a simple example: Activity: Package COM. home. urlconnection; import Java. io. ioexception; impo

URLs and URLConnection classesURLs in the network (Uniform Resource Locator) are abbreviations for Uniform Resource locators. It represents the address of a resource on the Internet. Through the URL we can access various network resources on the Internet, such as the most common www,ftp site. URLs can be thought of as "pointers" to Internet resources, which can be used to obtain information about Internet resources, including information about the Inp

For the issue of connecting Servlet with URLConnection in JDK, although there are some problems on the internet, it only illustrates one or several problems, which are solved by FAQ and scattered, now I will summarize the usage experience of this class in the project as follows: 1:> URL request category: There are two types: GET and POST requests. The difference between the two is: A: get requests can get static pages, or put parameters after URL stri

For the JDK in the URLConnection connection servlet problem, although the Internet has been involved, but only to explain a certain or a few problems, is the way to solve the FAQ, and relatively fragmented, now on the use of this class I in the project experience to do the following summary:1:> the category of the URL request:Divided into two categories, get and post requests. The difference between the two is:A:) Get request can get a static page, or

For the issue of connecting servlet with urlconnection in JDK, although there are some problems on the internet, it only illustrates one or several problems, which are solved by FAQ and scattered, now I will summarize the usage experience of this class in the project as follows:1:> URL request category:There are two types: Get and post requests. The difference between the two is:A: GET requests can get static pages, or put parameters after URL strings

in front of network programming (1) We learned that if you want to access the resources of other hosts, then you need to know the URL of the resource. So if we know the URL, how do we go toaccess the resources on its host? This articlemainly about the Java language Programming Android network programming of the most basic parent class urlconnectiion, the class is the use of URLs to achieve host resource access, each subclass of its characteristics are further optimized and support the new networ

Normal download and URLConnection 6 (64), urlconnection64 Normal download When the service uses breakpoint download, the response information is 206. UrlConnection-HttpurlConnection. -Obtain the urlconnection instance through URL. Normal download example Package cn. demo; import java. io. fileOutputStream; import java.

Public abstract class urlconnection{public URL GetURL () //Return the currently connected URL object public int Getcontentlength () //Returns the length of the resource file public String getContentType ()//returns the type of the resource file public long getlastmodified () // Returns the last modified date of the resource file}The OpenConnection () method of the URL class can create a URLConnect