java根据地址获取百度API经纬度

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java根据地址获取百度API经纬度（详细文档）

public void getLarLng(String address) throws Exception { String ak = "vZ5wAkH9uc6mCnrhtYWey2fBHBmU9Rh5"; String addressUrl = "http://api.map.baidu.com/geocoder/v2/?address=" + address + "&output=json&ak=" + ak + "&callback=showLocation"; URL url = new URL(addressUrl); InputStream inputStream = url.openStream(); String string = IOUtils.toString(inputStream); // showLocation&&showLocation({"status":0,"result":{"location":{"lng":121.4423987575458,"lat":30.939981749234133},"precise":1,"confidence":80,"level":"道路"}}) System.out.println(string); int len = string.length(); String substring = string.substring(27, len - 1); // {"status":0,"result":{"location":{"lng":121.4423987575458,"lat":30.939981749234133},"precise":1,"confidence":80,"level":"道路"}}
System.out.println(substring); JSONObject jsonObject = JSONObject.parseObject(substring); String status = jsonObject.getString("status"); Double lng = 0.0; Double lat = 0.0; if (status.equals("0")){ lng = jsonObject.getJSONObject("result").getJSONObject("location").getDouble("lng"); lat = jsonObject.getJSONObject("result").getJSONObject("location").getDouble("lat");
} if (Double.isNaN(lng)){
System.out.println(0);
}
BigDecimal bd = new BigDecimal(lng);
// 保留小数点后六位并做四舍五入
double v = bd.setScale(6, BigDecimal.ROUND_HALF_UP).doubleValue(); System.out.println(v);
System.out.println(lat);
}