java使用HttpURLConnection和HttpClient分别模拟get和post请求以及操作cookies
1.使用HttpURLConnection
- public static String getJsonByURL(String base_url) {
- String url = base_url;
- StringBuilder json = new StringBuilder();
- String result = "";
- try {
- URL u = new URL(url);
- HttpURLConnection uc = (HttpURLConnection) u.openConnection();
- uc.setRequestMethod("GET");
- //uc.setRequestMethod("POST");
- /*
- String cookieVal =uc.getHeaderField("Set-Cookie"); //获取session
- String JSESSIONID = (cookieVal.substring(0,cookieVal.indexOf(";")));
- uc.setRequestProperty("Cookie", JSESSIONID);//设置session
- */
- BufferedReader bd = new BufferedReader(new InputStreamReader(uc.getInputStream(),"GBK"));
- String s = null;
- while((s=bd.readLine())!=null) {
- json.append(s);
- }
- bd.close();
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- result = json.toString();
- return result;
- }
2.使用HttpClient
(1)get
- public static String getJsonByGet(String url) {
- String s = "";
- //CloseableHttpClient httpclient = HttpClients.createDefault();
- DefaultHttpClient httpclient = new DefaultHttpClient(new PoolingClientConnectionManager());
- HttpGet httpget = new HttpGet(url);
- CloseableHttpResponse response = null;
- HttpEntity entity = null;
- try {
- response = httpclient.execute(httpget);
- entity = response.getEntity();
- /*
- CookieStore cookieStore = httpclient.getCookieStore();//获取cookies
- httpclient.setCookieStore(cookieStore);//设置cookies
- */
- s = EntityUtils.toString(entity, "UTF-8");
- } catch (ClientProtocolException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }finally {
- httpclient.close();
- }
- return s;
- }
(POST)
- public static String getJsonByPost(String url) {
- DefaultHttpClient httpclient = new DefaultHttpClient(new PoolingClientConnectionManager());
- //CloseableHttpClient httpclient = HttpClients.createDefault();
- HttpPost httppost = new HttpPost(url);
- CloseableHttpResponse response = null;
- HttpEntity entity = null;
- String s = "";
- try {
- response = httpclient.execute(httppost);
- entity = response.getEntity();
- s = EntityUtils.toString(entity, "UTF-8");
- } catch (ClientProtocolException e1) {
- // TODO Auto-generated catch block
- e1.printStackTrace();
- } catch (IOException e1) {
- // TODO Auto-generated catch block
- e1.printStackTrace();
- }finally {
- httpclient.close();
- }
- return s;
- }
获取cookies和设置cookies的位置要根据不同的接口而定。
以上的方法是把接口的参数,在调用方法之前就配好了,作为url传入。也可在调用的相应方法内部做处理。
1.使用HttpURLConnection
- public static byte[] getJsonByURL(String url, String params) throws Exception{
- URL url = new URL(url);
- HttpURLConnection conn = (HttpURLConnection) url.openConnection();
- conn.setRequestMethod("POST");//
- // conn.setConnectTimeout(10000);//
- // conn.setReadTimeout(2000);//
- conn.setDoOutput(true);//
- byte[] bypes = params.toString().getBytes();
- conn.getOutputStream().write(bypes);// 输入参数
- InputStream inStream=conn.getInputStream();
- return StreamTool.readInputStream(inStream);
- }
对参数的处理有很多方法,可以append(),也可以自己+,不同参数,不同方法重载
2.使用HttpClient
- package com.tradeyun;
- import java.io.IOException;
- import java.io.UnsupportedEncodingException;
- import java.net.URI;
- import java.net.URISyntaxException;
- import java.util.ArrayList;
- import java.util.List;
- import org.apache.http.HttpEntity;
- import org.apache.http.HttpResponse;
- import org.apache.http.NameValuePair;
- import org.apache.http.client.ClientProtocolException;
- import org.apache.http.client.HttpClient;
- import org.apache.http.client.config.RequestConfig;
- import org.apache.http.client.entity.UrlEncodedFormEntity;
- import org.apache.http.client.methods.CloseableHttpResponse;
- import org.apache.http.client.methods.HttpGet;
- import org.apache.http.client.methods.HttpPost;
- import org.apache.http.client.utils.URIUtils;
- import org.apache.http.client.utils.URLEncodedUtils;
- import org.apache.http.impl.client.CloseableHttpClient;
- import org.apache.http.impl.client.DefaultHttpClient;
- import org.apache.http.impl.client.HttpClientBuilder;
- import org.apache.http.impl.client.HttpClients;
- import org.apache.http.impl.conn.PoolingClientConnectionManager;
- import org.apache.http.message.BasicNameValuePair;
- import org.apache.http.util.EntityUtils;
- /**
- * @author QiaoJiafei
- * @version 创建时间:2015年12月18日 上午10:03:12
- * 类说明
- */
- public class TestHttpClientParameter {
- public static void main(String args[]) {
- /* HttpClient httpclient = new DefaultHttpClient(new PoolingClientConnectionManager());
- String s = "";
- HttpResponse response = null;
- HttpEntity entity = null;
- String url = "http://172.16.30.244:8090/gm_product_site/assignmentApply/auth";
- System.out.println("url=========="+url);
- HttpPost post = new HttpPost(url);
- List formparams = new ArrayList();
- formparams.add(new BasicNameValuePair("applyId","1"));
- formparams.add(new BasicNameValuePair("isPass","true"));
- //formparams.add(new BasicNameValuePair("pwd","aaaaaa1"));
- //formparams.add(new BasicNameValuePair("pwd", "aaaaaa1"));
- UrlEncodedFormEntity uefEntity;
- try {
- uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");
- post.setEntity(uefEntity);
- System.out.println("executing request " + post.getURI());
- response = httpclient.execute(post);
- entity = response.getEntity();
- s= EntityUtils.toString(entity, "UTF-8");
- System.out.println(s);
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- } */ //不成功
- TestHttpClientParameter t = new TestHttpClientParameter();
- t.post3();
- }
- public void post3() {
- HttpClient httpclient = new DefaultHttpClient(new PoolingClientConnectionManager());
- String s = "";
- HttpResponse response = null;
- HttpEntity entity = null;
- String url = "http://172.16.30.244:8090/gm_product_site/assignmentApply/auth";
- System.out.println("url=========="+url);
- HttpPost post = null;
- List formparams = new ArrayList();
- formparams.add(new BasicNameValuePair("applyId","1"));
- formparams.add(new BasicNameValuePair("isPass","true"));
- UrlEncodedFormEntity uefEntity;
- try {
- uefEntity = new UrlEncodedFormEntity(formparams, "UTF-8");
- URI uri=null;
- try {
- uri = URIUtils.createURI("http", "172.16.30.244:8090", -1, "/gm_product_site/assignmentApply/auth",
- URLEncodedUtils.format(formparams, "UTF-8"), null);
- } catch (URISyntaxException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- post = new HttpPost(uri);
- System.out.println(post.getURI());
- response = httpclient.execute(post);
- entity = response.getEntity();
- s= EntityUtils.toString(entity, "UTF-8");
- System.out.println(s);
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
httpclient也可以使用下面的方式:
- package com.core.execute;
- import java.io.UnsupportedEncodingException;
- import java.util.ArrayList;
- import java.util.HashMap;
- import java.util.List;
- import java.util.Map;
- import org.apache.http.HttpEntity;
- import org.apache.http.HttpResponse;
- import org.apache.http.NameValuePair;
- import org.apache.http.client.HttpClient;
- import org.apache.http.client.entity.UrlEncodedFormEntity;
- import org.apache.http.client.methods.HttpPost;
- import org.apache.http.impl.client.HttpClients;
- import org.apache.http.message.BasicNameValuePair;
- import org.apache.http.util.EntityUtils;
- /**
- * @author QiaoJiafei
- * @version 创建时间:2016年3月2日 上午10:54:24
- * 类说明
- */
- public class TestMapPara {
- static HttpClient client = HttpClients.createDefault();
- public static void main(String args[]) {
- Map<String, String> map = new HashMap<String, String>();
- map.put("id", "22");
- postmap(map);
- }
- private static void postmap(Map<String, String> params) {
- // TODO Auto-generated method stub
- String url = "http://172.16.30.73:8080/test/user/update";
- HttpPost httppost = new HttpPost(url);
- List<NameValuePair> ps = new ArrayList<NameValuePair>();
- for (String pKey : params.keySet()) {
- ps.add(new BasicNameValuePair(pKey, params.get(pKey)));
- }
- try {
- httppost.setEntity(new UrlEncodedFormEntity(ps));
//上面一行代码也可以使用带有编码格式的构造方法,如new UrlEncodedFormEntity(ps, "UTF-8");- HttpResponse response = client.execute(httppost);
- HttpEntity httpEntity = response.getEntity();
- System.out.println(EntityUtils.toString(httpEntity,"utf-8"));
- } catch (Exception e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
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