java根据IP获取用户所在地

http://blog.csdn.net/huiwenjie168/article/details/16898619

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);

}
/**
* 获取地址
* @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")));//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 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�?

connection.setReadTimeout(2000);// 设置读取数据超时时间，单位毫�?

connection.setDoInput(true);// 是否打开输出�? 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();

}

}


需要下载 org.json jar包
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