java 百度地图经纬度偏移修正

第一种方法：

public static void main(String[] args) {
try {
String lon = "113.540124";
String lat = "23.517846";
JSONObject json = getAllEmployee(lon, lat);
String result = json.getString("result");

System.err.println(result);

//添加处理String转为Json

//result = result.substring(1, result.length() - 1);
//JSONObject jsonobject = JSONObject.fromObject(result);
//System.out.println(jsonobject.getString("x"));
//System.out.println(jsonobject.getString("y"));

} catch (Exception e) {
e.printStackTrace();
}
}


/**
* 返回JSON格式的数据
* 
*/
public static JSONObject getAllEmployee(String lon, String lat) {
String url = "http://api.map.baidu.com/geoconv/v1/?coords=" + lon + "," + lat
+ ";116.964273,36.545689&from=1&to=5&ak=Dw*******************pGuMG";
try {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);
ResponseHandler<JSONObject> responseHandler = new ResponseHandler<JSONObject>() {
// 成功调用连接后，对返回数据进行的操作
@Override
public JSONObject handleResponse(HttpResponse response) throws ClientProtocolException, IOException {
int status = response.getStatusLine().getStatusCode();
if (status >= 200 && status < 300) {
// 获得调用成功后 返回的数据
HttpEntity entity = response.getEntity();
if (null != entity) {
String result = EntityUtils.toString(entity);
// 根据字符串生成JSON对象
JSONObject resultObj = JSONObject.fromObject(result);
return resultObj;
} else {
return null;
}
} else {
throw new ClientProtocolException("Unexpected response status: " + status);
}
}
};
JSONObject responseBody = httpclient.execute(httpPost, responseHandler);
return responseBody;
} catch (Exception e) {
e.printStackTrace();
return null;
}

}

参数说明：

结果：

第二种方法：借鉴别人的博客写的

public static void main(String[] args) {
try {
String lon = "113.540124";
String lat = "23.517846";
JSONObject json = getAllEmployee(lon, lat);
String latitude = json.getString("x");
String longitude = json.getString("y");
System.out.println(decode(latitude));// 113.55180949764
System.out.println(decode(longitude));// 23.52123360177
} catch (Exception e) {
e.printStackTrace();
}
}


/**
* 返回JSON格式的数据
* 
*/
public static JSONObject getAllEmployee(String lon, String lat) {
String url = "http://api.map.baidu.com/ag/coord/convert?from=0&to=4&x=" + lon + "&y=" + lat;
try {
CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);
ResponseHandler<JSONObject> responseHandler = new ResponseHandler<JSONObject>() {
// 成功调用连接后，对返回数据进行的操作
@Override
public JSONObject handleResponse(HttpResponse response) throws ClientProtocolException, IOException {
int status = response.getStatusLine().getStatusCode();
if (status >= 200 && status < 300) {
// 获得调用成功后 返回的数据
HttpEntity entity = response.getEntity();
if (null != entity) {
String result = EntityUtils.toString(entity);
// 根据字符串生成JSON对象
JSONObject resultObj = JSONObject.fromObject(result);
return resultObj;
} else {
return null;
}
} else {
throw new ClientProtocolException("Unexpected response status: " + status);
}
}
};
JSONObject responseBody = httpclient.execute(httpPost, responseHandler);
return responseBody;
} catch (Exception e) {
e.printStackTrace();
return null;
}
}


public static String decode(String str) {
byte[] bytes = null;
String string = "";
try {
sun.misc.BASE64Decoder decoder = new sun.misc.BASE64Decoder();
bytes = decoder.decodeBuffer(str);
string = new String(bytes, "GB2312");
} catch (IOException e) {
e.printStackTrace();
}
return string;

}

结果：

所需jar包