一.用json-lib的jar包输出json串：
public void responseJason(HttpServletResponse response, Object obj){
ObjectMapper objectMapper = new ObjectMapper();
ByteArrayOutputStream baos = new ByteArrayOutputStream();// 向OutPutStream中写入
try {
objectMapper.writeValue(baos, obj);// 对象写入json
} catch (IOException e) {
e.printStackTrace();
}
response.setContentType(“application/json; charset=utf-8”);
try {
response.getWriter().write(baos.toString());
response.getWriter().flush();
} catch (IOException e) {
e.printStackTrace();
}
}
二.相对应的，来解析json串：
public String getRegionByIP(String ip){
String url = “http://ip.taobao.com/service/getIpInfo.php?ip=”+ip;
HttpClient httpClient = new DefaultHttpClient();
HttpPost httpost = new HttpPost(url);
String returnRegion = “”;
try {
HttpResponse response = httpClient.execute(httpost);
HttpEntity httpEntity = response.getEntity();
String responseString = EntityUtils.toString(httpEntity);
ObjectMapper objectMapper = new ObjectMapper();
Map map = objectMapper.readValue(responseString, Map.class);
Map dataMap = (Map) map.get(“data”);
String region = dataMap.get(“region”).toString();
String city = dataMap.get(“city”).toString();
returnRegion = region+”,”+city;
} catch (ClientProtocolException e) {
logger.info(“用IP: “+ip+” 取省市出错！”);
} catch (IOException e) {
//ipFlag = false;
logger.info(“用IP: “+ip+” 取省市出错！”);
} catch (Exception e) {
//ipFlag = false;
logger.info(“用IP: “+ip+” 取省市出错！”);
}
return returnRegion;
}
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原创文章，作者：奋斗，如若转载，请注明出处：https://blog.ytso.com/7025.html