Application of Proxy in Java programming __ programming

First, set up System Agent

The method is as follows:

java-dhttp.proxyhost=192.168.254.254-dhttp.proxyport=9000 Com.domain.Program

or

System.setproperty ("Http.proxyhost", "192.168.254.254");

System.setproperty ("Http.proxyport", "9000");

System.setproperty ("Http.nonproxyhosts", "java.oreilly.com|xml.oreilly.com"); No proxies for these two hosts

Second, the proxy class Java.net.Proxy

Three enumeration objects in proxy

Proxy.Type.DIRECT

Proxy.Type.HTTP

Proxy.Type.SOCKS

The most important thing for a proxy server is IP and port, and the following code makes an HTTP proxy

SocketAddress address = new Inetsocketaddress ("proxy.example.com", 80); Proxy proxy = new Proxy (Proxy.Type.HTTP, address);

Third, Java 1.5 added a new class Proxyselector specific usage, please check the Java Network programming Chapter7 7.4