这是基于springmvc+mybatis 的一个controller。如果不是这个框架，可以把方法实体抽到自己写的一个类中，然后再测试

package com.uwitec.controller.system.tools;

import java.io.BufferedReader;

import java.io.IOException;

import java.io.InputStreamReader;

import java.io.PrintWriter;

import java.io.UnsupportedEncodingException;

import java.net.HttpURLConnection;

import java.net.MalformedURLException;

import java.net.URL;

import java.net.URLEncoder;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

import javax.servlet.http.HttpServletRequest;

import javax.servlet.http.HttpServletResponse;

import org.apache.commons.lang.StringUtils;

import org.codehaus.jackson.JsonNode;

import org.codehaus.jackson.map.ObjectMapper;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.ResponseBody;

import org.springframework.web.servlet.ModelAndView;

import com.google.gson.Gson;

import com.uwitec.controller.base.BaseController;

import com.uwitec.util.AppUtil;

import com.uwitec.util.Const;

import com.uwitec.util.MapDistance;

import com.uwitec.util.PageData;

import com.uwitec.util.PathUtil;

import com.uwitec.util.TwoDimensionCode;

@Controller

@RequestMapping(value="/tool")

public class ToolController extends BaseController {

/**

* 输入地址返回经纬度坐标

* key lng(经度),lat(纬度)

*/

@RequestMapping(value="/getXY")

public  void getGeocoderLatitude(String address){

BufferedReader in = null;

try {

address = URLEncoder.encode(address, "UTF-8");

URL tirc = new URL("http://api.map.baidu.com/geocoder?address="+ address +"&output=json&key="+"7d9fbeb43e975cd1e9477a7e5d5e192a");

in = new BufferedReader(new InputStreamReader(tirc.openStream(),"UTF-8"));

String res;

StringBuilder sb = new StringBuilder("");

while((res = in.readLine())!=null){

sb.append(res.trim());

}

String str = sb.toString();

if(StringUtils.isNotEmpty(str)){

int lngStart = str.indexOf("lng\":");

int lngEnd = str.indexOf(",\"lat");

int latEnd = str.indexOf("},\"precise");

if(lngStart > 0 && lngEnd > 0 && latEnd > 0){

String lng = str.substring(lngStart+5, lngEnd);

String lat = str.substring(lngEnd+7, latEnd);

}

}

}catch (Exception e) {

e.printStackTrace();

}finally{

try {

in.close();

} catch (IOException e) {

e.printStackTrace();

}

}

}

/**

* 输入经纬度返回地址

* key lng(经度),lat(纬度)

*/

@RequestMapping(value="/getAdr")

public void getposition(String latitude,String longitude) throws MalformedURLException{

BufferedReader in = null;

URL tirc = new URL("http://api.map.baidu.com/geocoder?location="+ latitude+","+longitude+"&output=json&key="+"E4805d16520de693a3fe707cdc962045");

try {

in = new BufferedReader(new InputStreamReader(tirc.openStream(),"UTF-8"));

String res;

StringBuilder sb = new StringBuilder("");

while((res = in.readLine())!=null){

sb.append(res.trim());

}

String str = sb.toString();

//System.out.println(str);

ObjectMapper mapper = new ObjectMapper();

if(StringUtils.isNotEmpty(str)){

JsonNode jsonNode = mapper.readTree(str);

jsonNode.findValue("status").toString();

JsonNode resultNode = jsonNode.findValue("result");

JsonNode locationNode = resultNode.findValue("formatted_address");

System.out.println(locationNode);

}

} catch (UnsupportedEncodingException e) {

e.printStackTrace();

} catch (IOException e) {

e.printStackTrace();

}

}

}

二：SQL语句计算经纬度距离：2017-04-07

SELECT id, ( 6371* acos( cos( radians(37) ) * cos( radians( lat ) ) * cos( radians( lng ) - radians(-122) ) + sin( radians(37) ) * sin( radians( lat ) ) ) ) AS distance FROM markers HAVING distance < 25 ORDER BY id LIMIT 20

SELECT

(

6371 * acos(

cos(radians(29.490295)) * cos(radians(29.615467)) * cos(

radians(106.581515) - radians(106.486654)

) + sin(radians(29.490295)) * sin(radians(29.615467))

)

)*1000 AS distance

delimiter //

drop function if exists FUN_JW_DIST;

CREATE FUNCTION `FUN_JW_DIST`(lng1 double(15,9), lat1 double(15, 9), lng2 double(15,9), lat2 double(15,9)) RETURNS int(11)

BEGIN

DECLARE dist int;

SET dist = round((

6371 * acos(

cos(radians(lat1)) * cos(radians(lat2)) * cos(

radians(lng1) - radians(lng2)

) + sin(radians(lat1)) * sin(radians(lat2))

)

)*1000);

RETURN (dist);

END;

SELECT FUN_JW_DIST(106.486654 , 29.490295 , 106.581515 , 29.615467);