编写Java application时,怎么设置proxy的信息,以便访问外部网站

编写Java application时,如何设置proxy的信息,以便访问外部网站?
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();

.....