下载指定网页的源代码，存储到指定位置，程序开头设置了代理，需通过控制台输入网址，存储地址和文件名，代码指定为UTF-8字符集，如有不同需要需修改。-Download the source code specified page stored in the specified location, at the beginning of the program set a proxy, need to enter the URL through the console, store addresses and file names, code specified as UTF-8 character set, if the different needs to be modified.