java存储ip地址 java设置ip

 

System.setProperty("http.maxRedirects", "50");  
           System.getProperties().setProperty("proxySet", "true");  
           // 如果不设置，只要代理IP和代理端口正确,此项不设置也可以    
          System.getProperties().setProperty("http.proxyHost",“代理ip地址”);  
           System.getProperties().setProperty("http.proxyPort", "代理ip端口号");  
             
           //确定代理是否设置成功  
           System.out.println(getHtml("http://iframe.ip138.com/ic.asp"));          writefile("D:/daili.txt", getHtml("http://iframe.ip138.com/ic.asp")+"\r\n", true);
  public static String getHtml(String address){  
         StringBuffer html = new StringBuffer();  
         String result = null;  
         try{  
             URL url = new URL(address);  
             URLConnection conn = url.openConnection();  
             conn.setRequestProperty("User-Agent","Mozilla/4.0 (compatible; MSIE 7.0; NT 5.1; GTB5; .NET CLR 2.0.50727; CIBA)");  
             BufferedInputStream in = new BufferedInputStream(conn.getInputStream());  
               
             try{  
                 String inputLine;  
                 byte[] buf = new byte[4096];  
                 int bytesRead = 0;  
                 while (bytesRead >= 0) {  
                     inputLine = new String(buf, 0, bytesRead, "ISO-8859-1");  
                     html.append(inputLine);  
                     bytesRead = in.read(buf);  
                     inputLine = null;  
                 }  
                 buf = null;  
             }finally{  
                 in.close();  
                 conn = null;  
                 url = null;  
             }  
             result = new String(html.toString().trim().getBytes("ISO-8859-1"), "gb2312").toLowerCase();  
               
         }catch (Exception e) {  
             e.printStackTrace();  
             return null;  
         }finally{  
             html = null;              
         }  
         return result;  
     }