对httpclient4.3版本的一个简单封装，下面是代码
/**
* httputil工具类
*
* @author rex
*/
public class HttpUtil {
private static CloseableHttpClient client;
private static BasicCookieStore cookieStore;
private static HttpGet get;
private static HttpPost post;
private static HttpResponse response;
private static Result result;
private static HttpEntity entity;
/**
* //TODO get请求
*
* @param url 请求地址
* @param headers 请求头
* @param params 请求参数
* @param encoding 请求编码
* @return
* @throws IOException
* @throws ClientProtocolException
*/
public static Result get(String url, Map<String, String> headers, Map<String, String> params) throws ClientProtocolException, IOException {
cookieStore = new BasicCookieStore();
client = HttpClients.custom().setDefaultCookieStore(cookieStore).build();
url = (null == params ? url : url + parseParam(params));
get = new HttpGet(url);
get.setHeaders(parseHeader(headers));
response = client.execute(get);
entity = response.getEntity();
result = new Result();
result.setHttpClient(client);
result.setCookies(cookieStore.getCookies());
result.setStatusCode(response.getStatusLine().getStatusCode());
result.setHeaders(response.getAllHeaders());
result.setHttpEntity(entity);
result.setBody(EntityUtils.toString(entity));
return result;
}
/**
* //TODO post请求
*
* @param url 请求地址
* @param headers 请求头
* @param params 请求参数
* @param encoding 请求编码
* @return
* @throws IOException
* @throws ClientProtocolException
*/
public static Result post(String url, Map<String, String> headers, Map<String, String> params, String encoding) throws ClientProtocolException, IOException {
cookieStore = new BasicCookieStore();
client = HttpClients.custom().setDefaultCookieStore(cookieStore).build();
post = new HttpPost(url);
List<NameValuePair> list = new ArrayList<NameValuePair>();
for (String temp : params.keySet()) {
list.add(new BasicNameValuePair(temp, params.get(temp)));
}
post.setEntity(new UrlEncodedFormEntity(list, encoding));
post.setHeaders(parseHeader(headers));
response = client.execute(post);
entity = response.getEntity();
result = new Result();
result.setHttpClient(client);
result.setCookies(cookieStore.getCookies());
result.setStatusCode(response.getStatusLine().getStatusCode());
result.setHeaders(response.getAllHeaders());
result.setHttpEntity(entity);
result.setBody(EntityUtils.toString(entity));
return result;
}
/**
* //TODO 转换header
*
* @param headers
* @return
*/
private static Header[] parseHeader(Map<String, String> headers) {
if (null == headers || headers.isEmpty()) {
return getDefaultHeaders();
}
Header[] allHeader = new BasicHeader[headers.size()];
int i = 0;
for (String str : headers.keySet()) {
allHeader[i] = new BasicHeader(str, headers.get(str));
i++;
}
return allHeader;
}
/**
* //TODO 默认header
*
* @return
*/
private static Header[] getDefaultHeaders() {
Header[] allHeader = new BasicHeader[2];
allHeader[0] = new BasicHeader("Content-Type", "application/x-www-form-urlencoded");
allHeader[1] = new BasicHeader("User-Agent", "Mozilla/5.0 (Windows NT 6.3; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/33.0.1750.146 Safari/537.36");
return allHeader;
}
/**
* //TODO 转换参数列表
*
* @param params
* @return
*/
private static String parseParam(Map<String, String> params) {
if (null == params || params.isEmpty()) {
return "";
}
StringBuffer sb = new StringBuffer();
for (String key : params.keySet()) {
sb.append(key + "=" + params.get(key) + "&");
}
return sb.substring(0, sb.length() - 1);
}
/**
* 释放httpclient对象
*/
public static void closeClient(CloseableHttpClient client) {
if (null != client) {
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
}
/**
* 封装请求返回结果
* @author rex
*
*/
public class Result {
private CloseableHttpClient httpClient;
private List<Cookie> cookies;
private HttpEntity httpEntity;
private HashMap<String, Header> headerAll;
private int statusCode;
private String body;
public List<Cookie> getCookies() {
return cookies;
}
public void setCookies(List<Cookie> cookies) {
this.cookies = cookies;
}
public CloseableHttpClient getHttpClient() {
return httpClient;
}
public void setHttpClient(CloseableHttpClient httpClient) {
this.httpClient = httpClient;
}
public int getStatusCode() {
return statusCode;
}
public void setStatusCode(int statusCode) {
this.statusCode = statusCode;
}
public void setHeaders(Header[] headers) {
headerAll = new HashMap<String, Header>();
for (Header header : headers) {
headerAll.put(header.getName(), header);
}
}
public HashMap<String, Header> getHeaderAll() {
return headerAll;
}
public void setHttpEntity(HttpEntity entity) {
this.httpEntity = entity;
}
public HttpEntity getHttpEntity() {
return httpEntity;
}
public String getBody() {
return body;
}
public void setBody(String body) {
this.body = body;
}
}
一个登录小米的测试
public class XiaoMiLogin {
public static void main(String[] args) {
String login_url = "https://account.xiaomi.com/pass/serviceLoginAuth2";
Map<String, String> params = new HashMap<String, String>();
params.put("user", "小米账号");
params.put("pwd", "密码");
params.put("callback", "https://account.xiaomi.com");
params.put("sid", "passport");
params.put("display", "mobile");
params.put("qs", "%3Fsid%3Dpassport");
params.put("_sign", "KKkRvCpZoDC+gLdeyOsdMhwV0Xg=");
try {
Result r = HttpUtil.post(login_url, null, params, "UTF-8");
for(Cookie cookie : r.getCookies()){
System.out.println(cookie.getName() + "=" + cookie.getValue());
}
HttpUtil.closeClient(r.getHttpClient());
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}
httpclient4.3简单封装,布布扣,bubuko.com
原文：http://my.oschina.net/biezhi/blog/297916