httpclient 封装post 和get

public class HttpClientUtils {

private static Logger logger = Logger.getLogger(HttpClientUtils.class);

/**
* get请求
*
* @return
*/
public static String doGet(String url) {
try {
HttpClient client = new DefaultHttpClient();
// 发送get请求
HttpGet request = new HttpGet(url);
HttpResponse response = client.execute(request);

/** 请求发送成功，并得到响应 **/
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
/** 读取服务器返回过来的json字符串数据 **/
String strResult = EntityUtils.toString(response.getEntity());
return strResult;
}
} catch (IOException e) {
e.printStackTrace();
}

return null;
}

/**
* post请求(用于key-value格式的参数)
*
* @param url
* @param params
* @return
*/
public static String doPost(String url, Map params) {

BufferedReader in = null;
try {
// 定义HttpClient
HttpClient client = new DefaultHttpClient();
// 实例化HTTP方法
HttpPost request = new HttpPost();
request.setHeader("Accept", "application/json");
request.setHeader("Content-Type", "application/json");
request.setURI(new URI(url));

// 设置参数
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
for (Iterator iter = params.keySet().iterator(); iter.hasNext();) {
String name = (String) iter.next();
String value = String.valueOf(params.get(name));
nvps.add(new BasicNameValuePair(name, value));

// System.out.println(name +"-"+value);
}
request.setEntity(new UrlEncodedFormEntity(nvps, HTTP.UTF_8));

HttpResponse response = client.execute(request);
int code = response.getStatusLine().getStatusCode();
if (code == 200) { // 请求成功
in = new BufferedReader(new InputStreamReader(response
.getEntity().getContent(), "utf-8"));
StringBuffer sb = new StringBuffer("");
String line = "";
String NL = System.getProperty("line.separator");
while ((line = in.readLine()) != null) {
sb.append(line + NL);
}

in.close();

return sb.toString();
} else { //
System.out.println("状态码：" + code);
return null;
}
} catch (Exception e) {
e.printStackTrace();

return null;
}
}

/**
* post请求（用于请求json格式的参数）
*
* @param url
* @param params
* @return
*/
public static String doPost(String url, String params) throws Exception {

CloseableHttpClient httpclient = HttpClients.createDefault();
HttpPost httpPost = new HttpPost(url);// 创建httpPost
httpPost.setHeader("Accept", "application/json");
httpPost.setHeader("Content-Type", "application/json");
String charSet = "UTF-8";
StringEntity entity = new StringEntity(params, charSet);
httpPost.setEntity(entity);
CloseableHttpResponse response = null;
try {
response = httpclient.execute(httpPost);
StatusLine status = response.getStatusLine();
int state = status.getStatusCode();
if (state == HttpStatus.SC_OK) {
HttpEntity responseEntity = response.getEntity();
String jsonString = EntityUtils.toString(responseEntity);
System.out.println(state);
return jsonString;
} else {
logger.error("请求返回:"+state+"("+url+")");
}
} finally {
if (response != null) {
try {
response.close();
} catch (IOException e) {
e.printStackTrace();
}
}
try {
httpclient.close();
} catch (IOException e) {
e.printStackTrace();
}
}
return null;
}

public static void main(String[] args) {
String url="http://zjhtcarapi.1hai.cn/Car/AddCarGPSLocat";
JSONObject jsonne=new JSONObject();
jsonne.put("ID",0);
jsonne.put("OrderNo","");
jsonne.put("storeID",0);
jsonne.put("VinNo","");
jsonne.put("LocateTime","2017-09-19T02:59:39.902Z");
jsonne.put("CreateTime","2017-09-19T02:59:39.902Z");
String m = jsonne.toString();
String s;
try {
s = doPost(url,m);
System.out.println(s);
} catch (Exception e) {
// TODO Auto-generated catch block
e.printStackTrace();
}



// String s=doGet("http://zjhtcarapi.1hai.cn/Car/GetCar?carId=82");
// System.out.println(s);

}