根据IP获取地理位置

简介最近项目某个功能需要根据ip地址从第三方接口获取详细的地理位置，从网上找了很多例子，主要接口有新浪的，淘宝的，腾讯，络茄网的。试了淘宝的，如果是数量级小的还可以，如果数量级达到上十万级就速度慢了，会导致系统崩溃。下面例子是淘宝的。

实例代码

/**
 * 根据IP地址获取详细的地域信息
 */
public class AddressUtil {
/**
 * @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
 * @throws UnsupportedEncodingException
 */
public  String getAddresses(String content, String encodingString)
throws UnsupportedEncodingException {
    String urlStr = "http://ip.taobao.com/service/getIpInfo.php";
    String returnStr = this.getResult(urlStr, content, encodingString);
    if (returnStr != null) {
/* 处理返回的省市区信息 */
String[] temp = returnStr.split(",");
if (temp.length < 3) {
return "未知城市";  // 无效IP，局域网测试
}
String province = (temp[4].split(":"))[1].replaceAll(""", "");
province = decodeUnicode(province);// 省份
if(province.equals("XX")||province==""){
province="";
}else{
province=province+"省";
}
String country = (temp[2].split(":"))[1].replaceAll(""", "");
    country = decodeUnicode(country);// 国家
    if(country.equals("XX")||country==""){
country="";
    }
String city = (temp[5].split(":"))[1].replaceAll(""", "");
    city = decodeUnicode(city);// 城市
    if(city.equals("XX")||city==""||city.equals("内网IP")){
city="";
    }else{
city=city+"市";
    }
String isp = (temp[7].split(":"))[1].replaceAll(""", "");
   isp = decodeUnicode(isp);// ISP
   if(isp.equals("XX")||isp==""){
isp="";
   }
   String str=province + city + isp;
   if(str.equals("")||str==""){
str=country;
   }else{
str=province + city+ " "+isp;
   }
   return str;
}
   return  "未知城市";
}
/**
 * @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|false*/
connection.setDoInput(true);/* 是否打开输入流true|false*/
connection.setRequestMethod("POST");// 提交方法POST|GET
connection.setUseCaches(false);/* 是否缓存true|false*/
connection.connect();/* 打开连接端口*/
                /* 打开输出流往对端服务器写数据*/
DataOutputStream out = new DataOutputStream(connection.getOutputStream());
                /* 写数据,也就是提交你的表单 name=xxx&pwd=xxx */
out.writeBytes(content);
out.flush();
out.close();
                /* 往对端写完数据对端服务器返回数据 */
BufferedReader reader = new BufferedReader(new InputStreamReader(
connection.getInputStream(), encoding));
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();
  }
    }
return "";
}
/**
 * unicode 转换成 中文
 * @param theString
 * @return
 */
public static String decodeUnicode(String theString) {
    char aChar;
    int len = theString.length();
    StringBuffer outBuffer = new StringBuffer(len);
    for (int x = 0; x < len;) {
aChar = theString.charAt(x++);
if (aChar == '\') {
    aChar = theString.charAt(x++);
    if (aChar == 'u') {
int value = 0;
for (int i = 0; i < 4; i++) {
    aChar = theString.charAt(x++);
    switch (aChar) {
    case '0':
    case '1':
    case '2':
    case '3':
            case '4':
    case '5':
    case '6':
    case '7':
    case '8':
    case '9':
         value = (value << 4) + aChar - '0';
    break;
    case 'a':
    case 'b':
    case 'c':
    case 'd':
    case 'e':
    case 'f':
value = (value << 4) + 10 + aChar - 'a';
    break;
    case 'A':
    case 'B':
    case 'C':
    case 'D':
    case 'E':
    case 'F':
value = (value << 4) + 10 + aChar - 'A';
    break;
    default:
    throw new IllegalArgumentException("Malformed encoding.");
}
   }
      outBuffer.append((char) value);
 } else {
if (aChar == 't') {
aChar = 't';
} else if (aChar == 'r') {
aChar = 'r';
} else if (aChar == 'n') {
aChar = 'n';
} else if (aChar == 'f') {
aChar = 'f';
}
outBuffer.append(aChar);
     }
} else {
outBuffer.append(aChar);
}
}
return outBuffer.toString();
}
/*测试
public static void main(String[] args) {
AddressUtil addressUtils = new AddressUtil();
/*测试 ip 219.136.134.157 中国=华南=广东省=广州市=越秀区=电信*/
String ip = "117.135.170.150";
String address = "";
try {
    address = addressUtils.getAddresses("ip=" + ip, "utf-8");
} catch (UnsupportedEncodingException e) {
    // TODO Auto-generated catch block
    e.printStackTrace();
}
System.out.println(address);
/*输出结果为：广东省,广州市,越秀区*/
}
*/
}