HTTPCLIENT 学习 (1) 入门

早就如雷贯耳它的大名，却一直不曾相见，昨天下载下来，今天终于测试了一把，用的官网的QUICK START例子，来访问我自己以前开发过的WEB程序，因为这个网站恰好有一个写好的通过POST请求验证用户名密码进行登录的功能。

下面是QUICK START的代码：

public class QuickStart {

public static void main(String[] args) throws Exception {
CloseableHttpClient httpclient = HttpClients.createDefault();
try {
HttpGet httpGet = new HttpGet("http://localhost:8080/login.html");
CloseableHttpResponse response1 = httpclient.execute(httpGet);
// The underlying HTTP connection is still held by the response
// object
// to allow the response content to be streamed directly from the
// network socket.
// In order to ensure correct deallocation of system resources
// the user MUST call CloseableHttpResponse#close() from a finally
// clause.
// Please note that if response content is not fully consumed the
// underlying
// connection cannot be safely re-used and will be shut down and
// discarded
// by the connection manager.
try {
System.out.println(response1.getStatusLine());
HttpEntity entity1 = response1.getEntity();
// do something useful with the response body
// and ensure it is fully consumed
EntityUtils.consume(entity1);
} finally {
response1.close();
}

HttpPost httpPost = new HttpPost(
"http://localhost:8080/loginvalidate.html");
List<NameValuePair> nvps = new ArrayList<NameValuePair>();
nvps.add(new BasicNameValuePair("username", "shalltear"));
nvps.add(new BasicNameValuePair("password", "123123"));
httpPost.setEntity(new UrlEncodedFormEntity(nvps));
CloseableHttpResponse response2 = httpclient.execute(httpPost);

try {
System.out.println(response2.getStatusLine());
System.out.println(response2.getAllHeaders());
HttpEntity entity2 = response2.getEntity();
// do something useful with the response body
// and ensure it is fully consumed
EntityUtils.consume(entity2);
} finally {
response2.close();
}
} finally {
httpclient.close();
}
}

}

运行之后，WEB端收到了请求，以下是控制台的调试信息，可以看到已经验证通过
16:56:22.451 [http-8080-2] DEBUG org.mybatis.spring.SqlSessionUtils – Creating a new SqlSession
16:56:22.452 [http-8080-2] DEBUG org.mybatis.spring.SqlSessionUtils – SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@29bf9bb9] was not registered for synchronization because synchronization is not active
16:56:22.452 [http-8080-2] DEBUG o.m.s.t.SpringManagedTransaction – JDBC Connection [jdbc:oracle:thin:@localhost:1521/blogdb, UserName=SHALLTEAR, Oracle JDBC driver] will not be managed by Spring
16:56:22.452 [http-8080-2] DEBUG c.b.i.C.getPasswordByUserName – ==> Preparing: select password from t_password a where a.userid=(select b.userid from t_user b where b.username=?)
16:56:22.452 [http-8080-2] DEBUG c.b.i.C.getPasswordByUserName – ==> Parameters: shalltear(String)
16:56:22.455 [http-8080-2] DEBUG c.b.i.C.getPasswordByUserName – <== Total: 1 16:56:22.455 [http-8080-2] DEBUG org.mybatis.spring.SqlSessionUtils - Closing non transactional SqlSession [org.apache.ibatis.session.defaults.DefaultSqlSession@29bf9bb9] 16:56:22.455 [http-8080-2] DEBUG com.blog.dao.DaoImpl - passworddb: 8C52732AAAA8B64ABDB02F913522AAAA 16:56:22.455 [http-8080-2] DEBUG com.blog.dao.DaoImpl - passwordmd5: 8C52732AAAA8B64ABDB02F913522AAAA 16:56:22.455 [http-8080-2] DEBUG com.blog.dao.DaoImpl - 登陆成功