| httpclient妙用一 httpclient作为客户端调用webservice | http://aperise.iteye.com/blog/2223454 |
| httpclient妙用二 httpclient保持会话登录 | http://aperise.iteye.com/blog/2223470 |
| httpclient连接池 | http://aperise.iteye.com/blog/2295153 |
httpclient保持会话登录
1.原理
httpclient会话保持，原理是维持session会话，而session的保持是通过cookie来维持的。
本次要讲的是，得到用户cookie后，免登录，用HttpClient 保持原来session访问原本一定要登录才能做的事。
详细原理可参见http://abandontofree.blog.sohu.com/273547680.html
网上有个比较好的例子，参见http://www.cnblogs.com/yaowen/p/3757571.html
2.maven工程中引入对httpclient的依赖
<properties>
<httpclient.version>4.3.2</httpclient.version>
<properties>
<dependencyManagement>
<dependency>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
<version>1.1.1</version>
</dependency>
<dependencies>
<!-- httpclient -->
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>httpclient</artifactId>
<version>${httpclient.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>fluent-hc</artifactId>
<version>${httpclient.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.apache.httpcomponents</groupId>
<artifactId>http-core</artifactId>
<version>${httpclient.version}</version>
<exclusions>
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
</dependencyManagement>
3.第一种情况：每次登录后才进行后续操作
这种情况不用去处理cookie，httpclient4.x会自动处理cookie，只要使用同一httpclient，且没有手动连接放掉httpclient
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.apache.http.NameValuePair;
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.HttpPost;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class KeepSessionWithOneHttpclient {
/**
* 如果用的是同一个HttpClient且没去手动连接放掉client.getConnectionManager().shutdown();
* 都不用去设置cookie的ClientPNames.COOKIE_POLICY。httpclient都是会保留cookie的
* @param loginUrl
* @param loginNameValuePair
* @param urlAndNamePairList
* @return
*/
public static Map<String,String> doPostWithOneHttpclient(String loginUrl,List<NameValuePair> loginNameValuePair,
Map<String,List<NameValuePair>> urlAndNamePairList) {
//返回每个URL对应的响应信息
Map<String,String> map = new HashMap<String,String>();
String retStr = "";//每次响应信息
int statusCode = 0 ;//每次响应代码
// 创建HttpClientBuilder
HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
// HttpClient
CloseableHttpClient closeableHttpClient = null;
closeableHttpClient = httpClientBuilder.build();
HttpPost httpPost = new HttpPost(loginUrl);
// 设置请求和传输超时时间
RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(30000)
.setConnectTimeout(30000).build();
httpPost.setConfig(requestConfig);
UrlEncodedFormEntity entity = null;
try {
if(null!=loginNameValuePair){
entity = new UrlEncodedFormEntity(loginNameValuePair, "UTF-8");
httpPost.setEntity(entity);
}
//登录
CloseableHttpResponse loginResponse = closeableHttpClient.execute(httpPost);
statusCode = loginResponse.getStatusLine().getStatusCode();
retStr = EntityUtils.toString(loginResponse.getEntity(), "UTF-8");
map.put(loginUrl, retStr);
//登录后其他操作
for(Map.Entry<String,List<NameValuePair>> entry : urlAndNamePairList.entrySet()){
String url = entry.getKey();
List<NameValuePair> params = urlAndNamePairList.get(url);
httpPost = new HttpPost(url);
if(null!=params){
entity = new UrlEncodedFormEntity(params, "UTF-8");
httpPost.setEntity(entity);
}
CloseableHttpResponse operationResponse = closeableHttpClient.execute(httpPost);
statusCode = operationResponse.getStatusLine().getStatusCode();
retStr = EntityUtils.toString(operationResponse.getEntity(), "UTF-8");
map.put(url, retStr);
if(statusCode == 302){
String redirectUrl = operationResponse.getLastHeader("Location").getValue();
httpPost = new HttpPost(redirectUrl);
CloseableHttpResponse redirectResponse = closeableHttpClient.execute(httpPost);
statusCode = redirectResponse.getStatusLine().getStatusCode();
retStr = EntityUtils.toString(redirectResponse.getEntity(), "UTF-8");
map.put(redirectUrl, retStr);
}
}
// 释放资源
closeableHttpClient.close();
} catch (Exception e) {
e.printStackTrace();
}
return map;
}
public static void main(String[] args) {
//登录的地址以及登录操作参数
String loginUrl = "http://public_ip/xxx/sso_login";
//登录的相关参数以及登录后操作参数
List<NameValuePair> loginParams = new ArrayList<NameValuePair>();
loginParams.add(new BasicNameValuePair("sso_callback_uri","/xxx/forward?locale=zh_CN"));
loginParams.add(new BasicNameValuePair("appName", "xxx"));
loginParams.add(new BasicNameValuePair("username", "xxx"));
loginParams.add(new BasicNameValuePair("password", "xxx"));
//登录后操作地址以及登录后操作参数
String queryUrl = "http://public_ip/xxx/system/getRegionList.do";
List<NameValuePair> queryParams = new ArrayList<NameValuePair>();
queryParams.add(new BasicNameValuePair("regionNo", "xxx"));
queryParams.add(new BasicNameValuePair("pageNo", "xxx"));
queryParams.add(new BasicNameValuePair("pageSize", "xxx"));
Map<String,List<NameValuePair>> map = new HashMap<String,List<NameValuePair>>();
map.put(queryUrl, queryParams);
Map<String,String> returnMap = doPostWithOneHttpclient(loginUrl, loginParams, map);
System.out.println(returnMap.toString());
}
}
4.第二种情况：登录一次，后续使用之前登录时的cookie
登录后，将cookie保存起来，待有其他操作时，不用再次登录，首先设置cookie，然后调用操作
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.CookieStore;
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.HttpPost;
import org.apache.http.impl.client.BasicCookieStore;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClientBuilder;
import org.apache.http.impl.cookie.BasicClientCookie;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
public class LoginWithHttpclient {
static CookieStore cookieStore = null;
/**
* 组装登录参数
* @return
*/
public static List<NameValuePair> getLoginNameValuePairList() {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("sso_callback_uri","/xxx/forward?locale=zh_CN"));
params.add(new BasicNameValuePair("appName", "xxx"));
params.add(new BasicNameValuePair("username", "xxx"));
params.add(new BasicNameValuePair("password", "xxx"));
return params;
}
/**
* 组装操作参数
* @return
*/
public static List<NameValuePair> getQueryNameValuePairList() {
List<NameValuePair> params = new ArrayList<NameValuePair>();
params.add(new BasicNameValuePair("regionNo", "xxx"));
params.add(new BasicNameValuePair("pageNo", "xxx"));
params.add(new BasicNameValuePair("pageSize", "xxx"));
return params;
}
/**
* 将cookie保存到静态变量中供后续调用
* @param httpResponse
*/
public static void setCookieStore(HttpResponse httpResponse) {
System.out.println("----setCookieStore");
cookieStore = new BasicCookieStore();
// JSESSIONID
String setCookie = httpResponse.getFirstHeader("Set-Cookie").getValue();
String JSESSIONID = setCookie.substring("JSESSIONID=".length(),
setCookie.indexOf(";"));
System.out.println("JSESSIONID:" + JSESSIONID);
// 新建一个Cookie
BasicClientCookie cookie = new BasicClientCookie("JSESSIONID",JSESSIONID);
cookie.setVersion(0);
cookie.setDomain("domain");
cookie.setPath("/xxx");
cookieStore.addCookie(cookie);
}
public static String doPost(String postUrl,List<NameValuePair> parameterList) {
String retStr = "";
// 创建HttpClientBuilder
HttpClientBuilder httpClientBuilder = HttpClientBuilder.create();
// HttpClient
CloseableHttpClient closeableHttpClient = null;
if(cookieStore!=null){
closeableHttpClient = httpClientBuilder.setDefaultCookieStore(cookieStore).build();
}else{
closeableHttpClient = httpClientBuilder.build();
}
HttpPost httpPost = new HttpPost(postUrl);
// 设置请求和传输超时时间
RequestConfig requestConfig = RequestConfig.custom()
.setSocketTimeout(30000).setConnectTimeout(30000).build();
httpPost.setConfig(requestConfig);
try {
UrlEncodedFormEntity entity = new UrlEncodedFormEntity(parameterList, "UTF-8");
httpPost.setEntity(entity);
CloseableHttpResponse response = closeableHttpClient.execute(httpPost);
setCookieStore(response);
HttpEntity httpEntity = response.getEntity();
retStr = EntityUtils.toString(httpEntity, "UTF-8");
System.out.println(retStr);
// 释放资源
closeableHttpClient.close();
} catch (Exception e) {
}
return retStr;
}
public static void main(String[] args) {
String loginUrl = "http://domain/xxx/sso_login";
String queryReginUrl = "http://domani/xxx/system/getRegionList.do";
//第一次登录会保存cookie
doPost(loginUrl, getLoginNameValuePairList());
//第二次操作会调用已经存在的cookie
doPost(queryReginUrl, getQueryNameValuePairList());
}
}