通过IP地址获取此IP所在省市区信息
import java.io.BufferedReader;import java.io.DataOutputStream;import java.io.IOException;import java.io.InputStreamReader;import java.net.HttpURLConnection;import java.net.URL;public class AddressUtils {/** * * @param content * 请求的参数 格式为：name=xxx&pwd=xxx * @param encoding * 服务器端请求编码。如GBK,UTF-8等 * @return */public String getAddresses(String content, String encodingString) {// 这里调用pconline的接口String urlStr = "http://whois.pconline.sscom.cn/ipJson.jsp";// 从http://whois.pconline.com.cn取得IP所在的省市区信息String returnStr = this.getResult(urlStr, content, encodingString);if (returnStr != null) {// 处理返回的省市区信息int startIndex = returnStr.indexOf(""pro");int endIndex = returnStr.indexOf(","addr");if (startIndex > 0 && endIndex > 0 && endIndex > startIndex) {returnStr = returnStr.substring(startIndex, endIndex);returnStr = returnStr.replaceAll(""", "").replace("pro:", "").replace("city:", "").replace("region:", "");}}return returnStr;}/** * @param urlStr * 请求的地址 * @param content * 请求的参数 格式为：name=xxx&pwd=xxx * @param encoding * 服务器端请求编码。如GBK,UTF-8等 * @return */private String getResult(String urlStr, String content, String encoding) {URL url = null;HttpURLConnection connection = null;try {url = new URL(urlStr);connection = (HttpURLConnection) url.openConnection();// 新建连接实例connection.setConnectTimeout(2000);// 设置连接超时时间，单位毫秒connection.setReadTimeout(2000);// 设置读取数据超时时间，单位毫秒connection.setDoOutput(true);// 是否打开输出流 true|falseconnection.setDoInput(true);// 是否打开输入流true|falseconnection.setRequestMethod("POST");// 提交方法POST|GETconnection.setUseCaches(false);// 是否缓存true|falseconnection.connect();// 打开连接端口DataOutputStream out = new DataOutputStream(connection.getOutputStream());// 打开输出流往对端服务器写数据out.writeBytes(content);// 写数据,也就是提交你的表单 name=xxx&pwd=xxxout.flush();// 刷新out.close();// 关闭输出流BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream(), encoding));// 往对端写完数据对端服务器返回数据// ,以BufferedReader流来读取StringBuffer buffer = new StringBuffer();String line = "";while ((line = reader.readLine()) != null) {buffer.append(line);}reader.close();return buffer.toString();} catch (IOException e) {e.printStackTrace();} finally {if (connection != null) {connection.disconnect();// 关闭连接}}return null;}// 测试public static void main(String[] args) {AddressUtils addressUtils = new AddressUtils();// 测试ipString ip = "219.136.134.157";String address = addressUtils.getAddresses("ip=" + ip, "gbk");System.out.println(address);// 输出结果为：广东省,广州市,越秀区}}?