Eclipse编码问题汇总，UTF-8编码。在Eclipse中，默认编码是GBK。当通过网络取得一些内容时，直接System.Out.println结果会显示不正确

keyWord = URLEncoder.encode(keyWord, “UTF-8″); 
URL url = new URL(“http://www.google.com/search?q=” + keyWord + “&hl=en&ie=UTF-8&num=” + num + “&start=” + begin + “&sa=N”);
HttpURLConnection cont = (HttpURLConnection) url.openConnection();
cont.setRequestProperty(“User-Agent”, “Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1)”);
cont.connect();
BufferedReader reader = new BufferedReader(new InputStreamReader(cont.getInputStream()));

为了让结果显示正确，我们应该把Eclipse的编码方式设置为utf-8

但是这样的话，从本地电脑读取文件又会出问题，因为本地文件是以gbk编码存放的，如下所示

BufferedReader reader = new BufferedReader(new FileReader(“d:/aa.txt”)); //错误，编码方式不对 

BufferedReader reader = new BufferedReader(new InputStreamReader(new FileInputStream(“d:/aa.txt”), “GBK”)); //正确，强制以GBK编码读取文件