根据ip地址获取城市地理位置

package location.util; import java.io.IOException; import java.util.ArrayList; import java.util.List; import java.util.Map; import org.apache.http.HttpEntity; import org.apache.http.NameValuePair; import org.apache.http.client.ClientProtocolException; import org.apache.http.client.entity.UrlEncodedFormEntity; import org.apache.http.client.methods.CloseableHttpResponse; import org.apache.http.client.methods.HttpGet; import org.apache.http.client.methods.HttpPost; import org.apache.http.entity.StringEntity; import org.apache.http.impl.client.CloseableHttpClient; import org.apache.http.impl.client.HttpClients; import org.apache.http.message.BasicNameValuePair; import org.apache.http.util.EntityUtils; /** * description: 使用 HttpClient 实现服务端跨域请求 * @version v1.0 * @author w * @date 2018年9月10日下午3:20:32 */ public class HttpClientUtils { /** * description: 使用httpClient对象执行get请求 * @param uri 需要跨域请求的uri * @return * @throws ClientProtocolException * @throws IOException * String * @version v1.0 * @author w * @date 2018年9月10日 下午3:27:49 */ public static String doGet(String uri) throws ClientProtocolException, IOException{ // 1、 创建 httpClient 对象 CloseableHttpClient httpClient = HttpClients.createDefault(); // 2、 创建 get 对象 HttpGet get =new HttpGet(uri); // 3、 执行 get 请求 CloseableHttpResponse response = httpClient.execute(get); // 4、 获取返回结果 HttpEntity 对象 HttpEntity entity = response.getEntity(); // 5、获取返回结果中的数据 String data = EntityUtils.toString(entity); // 6、 关闭 response、 关闭 httpClient response.close(); httpClient.close(); return data; } /** * description: 使用httpClient对象执行 post 请求 * @param uri 需要跨域请求的uri , formDataMap 模拟表单需要提交数据 （name - value 形式） * @param formDataMap * @return * @throws ClientProtocolException * @throws IOException * String * @version v1.0 * @author w * @date 2018年9月10日 下午3:42:10 */ public static String doPost(String uri,Map<String,Object> formDataMap) throws ClientProtocolException, IOException{ // 1、创建httpClient 对象 CloseableHttpClient httpClient = HttpClients.createDefault(); // 2、 创建post 对象 HttpPost post =new HttpPost(uri); // 3、 创建一个list形式数据，模拟提交表单。 List<NameValuePair> formDataList=new ArrayList<>(); // TODO: 这里可以遍历模拟表单传递过来的数据 formDataMap /*Iterator<Entry<String, Object>> iterator = formDataMap.entrySet().iterator(); while(iterator.hasNext()){ Entry<String, Object> next = iterator.next(); String key = next.getKey(); String value = next.getValue().toString(); formDataList.add(new BasicNameValuePair(key, value)); }*/ formDataList.add(new BasicNameValuePair("ids", "110")); formDataList.add(new BasicNameValuePair("name", "httpClient 请求数据")); // 4、 把表单数据包装到entity 对象中 （StringEntity） StringEntity formData = new UrlEncodedFormEntity(formDataList, "UTF-8"); post.setEntity(formData); // 5、 执行post请求 CloseableHttpResponse response = httpClient.execute(post); // 6、 获取响应数据 HttpEntity entity = response.getEntity(); // 7、 响应数据转换为字符串 String data = EntityUtils.toString(entity); // 8、 关闭 httpClient对象、关闭 response response.close(); httpClient.close(); return data; } public static void main(String[] args) throws ClientProtocolException, IOException { long start = System.currentTimeMillis(); String url = "http://pv.sohu.com/cityjson?ie=utf-8"; String doGet = doGet(url); System.out.println(doGet); System.out.println((System.currentTimeMillis()-start)+ " ms"); } }