若在java application中访问外部网站,首先应设置proxy信息,样例代码如下:

import java.util.properties;
.....
properties sys = system.getproperties();
sys.put("proxyset","true");
sys.put("proxyhost","myhttp.proxyserver.com");
sys.put("proxyport","80");
system.setproperties(sys);
u = new url(website);
connect = (httpurlconnection)u.openconnection();
.....