通过IP地址获取地理位置

http://my.oschina.net/githubhty/blog/662958

<dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20160212</version>
        </dependency>

package com.jmsht.util;
 
import java.io.BufferedReader;  
import java.io.DataOutputStream;  
import java.io.InputStreamReader;  
import java.net.HttpURLConnection;  
import java.net.URL;  
   
import org.json.JSONObject;  
   
/**
 * 根据IP地址获取地理位置
 * @author Administrator
 *
 */
public class AddressUtils {  
   
       
       
    /** 
     * @param args 
     */  
    public static void main(String[] args) {  
           
        AddressUtils addressUtils = new AddressUtils();  
           
          String ip = "183.16.7.126";  
             
          String address = "";  
             
          try {  
                 
          address = addressUtils.getAddress("ip="+ip, "utf-8");  
              
          } catch (Exception e) {  
                 
              e.printStackTrace();  
          }  
             
          System.out.println(address);  
             
   
    }  
    /** 
     * 获取地址 
     * @param params 
     * @param encoding 
     * @return 
     * @throws Exception 
     */  
    public static String getAddress(String params, String encoding) throws Exception{  
           
        String path = "http://ip.taobao.com/service/getIpInfo.php";  
           
        String returnStr = 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")));//国家  
                   
//                buffer.append(decodeUnicode(json.optJSONObject("data").getString("area")));//地区  
                   
                buffer.append(decodeUnicode(json.optJSONObject("data").getString("region")));//省份  
                   
                buffer.append(decodeUnicode(json.optJSONObject("data").getString("city")));//市区  
                   
//                buffer.append(decodeUnicode(json.optJSONObject("data").getString("county")));//地区  
                   
//                buffer.append(decodeUnicode(json.optJSONObject("data").getString("isp")));//ISP公司  
                   
                System.out.println(buffer.toString());  
                   
                return buffer.toString();  
                   
            }else{  
                   
                return "获取地址失败";  
                   
            }  
               
        }  
           
        return null;  
           
    }  
    /** 
     * 从url获取结果 
     * @param path 
     * @param params 
     * @param encoding 
     * @return 
     */  
    public static 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.setDoInput(true);// 是否打开输出流? true|false  
               
            connection.setDoOutput(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  
               
            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();// 关闭连接  
               
        }  
           
        return null;  
    }  
    /** 
     * 字符转码 
     * @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();  
           
    }  
   
}