本方法利用淘寶IP地址庫實現，簡單易用，不需讀取文件，隨意隨用
工具類下載地址如下：
http://download.csdn.net/detail/yjqyyjw/9477715
工具類+測試方法源碼如下：
package com.gfan.yyq.yyqs.utils;
import java.io.BufferedReader;
import java.io.DataOutputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;
import org.json.JSONObject;
public class AddressUtils {
/**
* @param args
*/
public static void main(String[] args) {
AddressUtils addressUtils = new AddressUtils();
String ip = "118.213.176.78";
String address = "";
try {
address = addressUtils.getAddress("ip=" + ip, "utf-8");
} catch (Exception e) {
e.printStackTrace();
}
System.out.println(address);
}
/**
* 獲取地址
*
* @param params
* @param encoding
* @return
* @throws Exception
*/
public String getAddress(String params, String encoding) throws Exception {
String path = "http://ip.taobao.com/service/getIpInfo.php";
String returnStr = this.getRs(path, params, encoding);
JSONObject json = null;
if (returnStr != null) {
json = new JSONObject(returnStr);
if ("0".equals(json.get("code").toString())) {
StringBuffer buffer = new StringBuffer();
// buffer.append(decodeUnicode(json.optJSONObject("data").getString("country")));//國家
// buffer.append(decodeUnicode(json.optJSONObject("data").getString("area")));//地區
buffer.append(decodeUnicode(json.optJSONObject("data")
.getString("region")));// 省份
buffer.append(decodeUnicode(json.optJSONObject("data")
.getString("city")));// 市區
buffer.append(decodeUnicode(json.optJSONObject("data")
.getString("county")));// 地區
buffer.append(decodeUnicode(json.optJSONObject("data")
.getString("isp")));// ISP公司
System.out.println(buffer.toString());
return buffer.toString();
} else {
return "獲取地址失敗�?";
}
}
return null;
}
/**
* 從url獲取結果
*
* @param path
* @param params
* @param encoding
* @return
*/
public String getRs(String path, String params, String encoding) {
URL url = null;
HttpURLConnection connection = null;
try {
url = new URL(path);
connection = (HttpURLConnection) url.openConnection();// 新建連接實例
connection.setConnectTimeout(2000);// 設置連接超時時間，單位毫S?
connection.setReadTimeout(2000);// 設置讀取數據超時時間，單位毫S?
connection.setDoInput(true);// 是否打開輸出S? true|false
connection.setDoOutput(true);// 是否打開輸入流true|false
connection.setRequestMethod("POST");// 提交方法POST|GET
connection.setUseCaches(false);// 是否緩存true|false
connection.connect();// 打開連接端口
DataOutputStream out = new DataOutputStream(
connection.getOutputStream());
out.writeBytes(params);
out.flush();
out.close();
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 (Exception e) {
e.printStackTrace();
} finally {
connection.disconnect();// 關閉連接
}
return null;
}
/**
* 字符轉碼
*
* @param theString
* @return
*/
public static String decodeUnicode(String theString) {
char aChar;
int len = theString.length();
StringBuffer buffer = new StringBuffer(len);
for (int i = 0; i < len;) {
aChar = theString.charAt(i++);
if (aChar == '\\') {
aChar = theString.charAt(i++);
if (aChar == 'u') {
int val = 0;
for (int j = 0; j < 4; j++) {
aChar = theString.charAt(i++);
switch (aChar) {
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
val = (val << 4) + aChar - '0';
break;
case 'a':
case 'b':
case 'c':
case 'd':
case 'e':
case 'f':
val = (val << 4) + 10 + aChar - 'a';
break;
case 'A':
case 'B':
case 'C':
case 'D':
case 'E':
case 'F':
val = (val << 4) + 10 + aChar - 'A';
break;
default:
throw new IllegalArgumentException(
"Malformed encoding.");
}
}
buffer.append((char) val);
} else {
if (aChar == 't') {
aChar = '\t';
}
if (aChar == 'r') {
aChar = '\r';
}
if (aChar == 'n') {
aChar = '\n';
}
if (aChar == 'f') {
aChar = '\f';
}
buffer.append(aChar);
}
} else {
buffer.append(aChar);
}
}
return buffer.toString();
}
}