java使用代理访问网络

在使用java的net包访问网络时，如果需要使用代理，可以这样做：

System.getProperties().setProperty("proxySet","true");
System.getProperties().setProperty("http.proxyHost","183.121.23.188");
System.getProperties().setProperty("http.proxyPort","8080");

URLurl=newURL(http://www.163.com);
HttpURLConnectionhttpConn=(HttpURLConnection)url.openConnection();
HttpURLConnection.setFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("User-Agent","Mozilla/4.0(compatible;MSIE6.0;Windows2000)");
InputStreamin=httpConn.getInputStream();
BufferedReadermyBufferedReader=newBufferedReader(newInputStreamReader(in));
StringmyString=null;
while((myString=myBufferedReader.readLine())!=null){
System.out.println(myString);
}

其中，前三行就是设置代理的语句。

在使用java的net包访问网络时，如果需要使用代理，可以这样做：

System.getProperties().setProperty("proxySet","true");
System.getProperties().setProperty("http.proxyHost","183.121.23.188");
System.getProperties().setProperty("http.proxyPort","8080");

URLurl=newURL(http://www.163.com);
HttpURLConnectionhttpConn=(HttpURLConnection)url.openConnection();
HttpURLConnection.setFollowRedirects(true);
httpConn.setRequestMethod("GET");
httpConn.setRequestProperty("User-Agent","Mozilla/4.0(compatible;MSIE6.0;Windows2000)");
InputStreamin=httpConn.getInputStream();
BufferedReadermyBufferedReader=newBufferedReader(newInputStreamReader(in));
StringmyString=null;
while((myString=myBufferedReader.readLine())!=null){
System.out.println(myString);
}

其中，前三行就是设置代理的语句。