"SSM Distributed architecture e-Commerce project-15" HttpClient Access interface Service

External Interface Services

We put on an article: "SSM Distributed architecture e-commerce project-14" Background CMS Content Management System Management front page ads inside the Contentcontroller copy to the API package, external interface services:

Package Com.taotao.manage.controller.api;
Import org.springframework.beans.factory.annotation.Autowired;
Import Org.springframework.http.HttpStatus;
Import org.springframework.http.ResponseEntity;
Import Org.springframework.stereotype.Controller;
Import org.springframework.web.bind.annotation.RequestMapping;
Import Org.springframework.web.bind.annotation.RequestMethod;

Import Org.springframework.web.bind.annotation.RequestParam;
Import Com.taotao.common.bean.EasyUIResult;

Import Com.taotao.manage.service.ContentService; @RequestMapping ("Api/content") @Controller public class Apicontentcontroller {@Autowired private contentservice

    Contentservice;
    /** * Query category list based on content category ID * * @param categoryId * @param page * @param rows * @return * * @RequestMapping (method = requestmethod.get) public responseentity<easyuiresult> Querylistbycategoryid (@Reque Stparam ("CategoryId") Long categoryId, @RequestParam (value = "Page", DefAultvalue = "1") integer page, @RequestParam (value = "Rows", DefaultValue = "ten") integer rows) {try
            {Easyuiresult Easyuiresult = this.contentService.queryListByCategoryId (categoryId, page, rows);
        Return Responseentity.ok (Easyuiresult);
        } catch (Exception e) {e.printstacktrace ();
    } return Responseentity.status (Httpstatus.internal_server_error). body (null);
 }
}

Test:
How to access the interface service

There are 2 types of methods:
1. JS Access
A) a cross-domain –JSONP solution
b) No cross-domain –ajax resolution
2. Java code Access
A) Httpclient Httpclient

Import Dependency

Doget

Package cn.itcast.httpclient;
Import Org.apache.http.client.methods.CloseableHttpResponse;
Import Org.apache.http.client.methods.HttpGet;
Import org.apache.http.impl.client.CloseableHttpClient;
Import org.apache.http.impl.client.HttpClients;

Import Org.apache.http.util.EntityUtils; public class Doget {public static void main (string[] args) throws Exception {//Create HttpClient Object Clo

        Seablehttpclient httpclient = Httpclients.createdefault ();

        Create an HTTP GET request HttpGet HttpGet = new HttpGet ("Http://www.baidu.com/s?wd=java");
        Closeablehttpresponse response = null;
            try {//Execute request response = Httpclient.execute (HttpGet); Determines whether the return status is a Response.getstatusline (). Getstatuscode () = = () {String content = Entity
                Utils.tostring (Response.getentity (), "UTF-8");
            System.out.println ("content:" +content);
}} finally {if (response! = NULL) {                Response.close ();
        } httpclient.close ();
 }

    }

}

GET request with parameters

Package cn.itcast.httpclient;

Import Java.net.URI;
Import Org.apache.http.client.methods.CloseableHttpResponse;
Import Org.apache.http.client.methods.HttpGet;
Import Org.apache.http.client.utils.URIBuilder;
Import org.apache.http.impl.client.CloseableHttpClient;
Import org.apache.http.impl.client.HttpClients;

Import Org.apache.http.util.EntityUtils;
        public class Dogetparam {public static void main (string[] args) throws Exception {//Create HttpClient Object

        Closeablehttpclient httpclient = Httpclients.createdefault ();
                Defines the request's parameter URI uri = new UriBuilder ("Http://manage.taotao.com/rest/api/content"). Setparameter ("CategoryId", "33")

        . Setparameter ("page", "1"). Setparameter ("Rows", "1"). Build ();

        System.out.println (URI);

        Create an HTTP GET request HttpGet HttpGet = new HttpGet (URI);
        Closeablehttpresponse response = null;
            try {//Execute request response = Httpclient.execute (HttpGet); //Determine if the return status is a Response.getstatusline (). Getstatuscode () = = () {String content = Entityu
                Tils.tostring (Response.getentity (), "UTF-8");
            SYSTEM.OUT.PRINTLN (content);
            }} finally {if (response! = null) {response.close ();
        } httpclient.close ();
 }

    }

}

DoPOST

Package cn.itcast.httpclient;
Import java.util.ArrayList;

Import java.util.List;
Import Org.apache.http.NameValuePair;
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.HttpClients;
Import Org.apache.http.message.BasicNameValuePair;

Import Org.apache.http.util.EntityUtils;
        public class Dopostparam {public static void main (string[] args) throws Exception {//Create HttpClient Object

        Closeablehttpclient httpclient = Httpclients.createdefault ();

        Create an HTTP POST request HttpPost HttpPost = new HttpPost ("Http://www.oschina.net/search"); masquerading as browser httppost.setheader ("User-agent", "mozilla/5.0" (Windows NT 6.3;

        WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/50.0.2661.94 safari/537.36 "); Set 2 postParameters, one is scope, one is q list<namevaluepair> parameters = new Arraylist<namevaluepair> (0);
        Parameters.Add (New Basicnamevaluepair ("Scope", "project"));
        Parameters.Add (New Basicnamevaluepair ("Q", "Java"));
        Parameters.Add (New Basicnamevaluepair ("Fromerr", "7nxh76r7"));
        Construct a form-form entity urlencodedformentity formentity = new urlencodedformentity (parameters);

        Set the request entity to the HttpPost object Httppost.setentity (formentity);
        Closeablehttpresponse response = null;
            try {//Execute request response = Httpclient.execute (HttpPost); Determines whether the return status is a Response.getstatusline (). Getstatuscode () = = () {String content = Entity
                Utils.tostring (Response.getentity (), "UTF-8");
            SYSTEM.OUT.PRINTLN (content);
            }} finally {if (response! = null) {response.close ();
        } httpclient.close (); }

    }

}
 

POST request with parameters

 public static void Main (string[] args) throws Exception {//Create HttpClient object Closeablehttpclient Httpclie

        NT = Httpclients.createdefault ();

     Create an HTTP POST request HttpPost HttpPost = new HttpPost ("Http://www.oschina.net/search"); masquerading as browser httppost.setheader ("User-agent", "mozilla/5.0" (Windows NT 6.3;

        WOW64) applewebkit/537.36 (khtml, like Gecko) chrome/50.0.2661.94 safari/537.36 ");
        Set 2 post parameters, one is scope, one is q list<namevaluepair> parameters = new Arraylist<namevaluepair> (0);
        Parameters.Add (New Basicnamevaluepair ("Scope", "project"));
        Parameters.Add (New Basicnamevaluepair ("Q", "Java"));
        Parameters.Add (New Basicnamevaluepair ("Fromerr", "7nxh76r7"));
        Construct a form-form entity urlencodedformentity formentity = new urlencodedformentity (parameters); 

        Set the request entity to the HttpPost object Httppost.setentity (formentity);
        Closeablehttpresponse response = null;
          try {  Execution Request response = Httpclient.execute (HttpPost); Determines whether the return status is a Response.getstatusline (). Getstatuscode () = = () {String content = Entity
                Utils.tostring (Response.getentity (), "UTF-8");
            SYSTEM.OUT.PRINTLN (content);
            }} finally {if (response! = null) {response.close ();
        } httpclient.close ();
 }

    }

Connection Manager

Attention:

Package cn.itcast.httpclient;
Import Org.apache.http.client.methods.CloseableHttpResponse;
Import Org.apache.http.client.methods.HttpGet;
Import Org.apache.http.conn.HttpClientConnectionManager;
Import org.apache.http.impl.client.CloseableHttpClient;
Import org.apache.http.impl.client.HttpClients;
Import Org.apache.http.impl.conn.PoolingHttpClientConnectionManager;

Import Org.apache.http.util.EntityUtils; public class Httpconnectmanager {public static void main (string[] args) throws Exception {Poolinghttpclient
        ConnectionManager cm = new Poolinghttpclientconnectionmanager ();
        Set maximum number of connections cm.setmaxtotal (200);

        Sets the number of concurrent Cm.setdefaultmaxperroute (20) for each host address;
        Doget (CM);
    Doget (CM); } public static void Doget (Httpclientconnectionmanager cm) throws Exception {closeablehttpclient httpClient

        = Httpclients.custom (). Setconnectionmanager (CM). Build (); Create an HTTP GET request HttpGet HttpGet = new HttpGet ("http://www.baidu.com/");
        Closeablehttpresponse response = null;
            try {//Execute request response = Httpclient.execute (HttpGet); Determines whether the return status is a Response.getstatusline (). Getstatuscode () = = () {String content = Entity
                Utils.tostring (Response.getentity (), "UTF-8");
            System.out.println ("Content length:" + content.length ());
            }} finally {if (response! = null) {response.close ();
        }//cannot close httpClient here, if HttpClient is turned off, the connection pool will also be destroyed//Httpclient.close ();
 }
    }

}

Close Invalid connections periodically

public class Clientevictexpiredconnections {public static void main (string[] args) throws Exception {Poolin
        Ghttpclientconnectionmanager cm = new Poolinghttpclientconnectionmanager ();
        Set maximum number of connections cm.setmaxtotal (200);

        Sets the number of concurrent Cm.setdefaultmaxperroute (20) for each host address;
    New Idleconnectionevictor (cm). Start (); } public static class Idleconnectionevictor extends Thread {private final Httpclientconnectionmanager connm

        Gr

        Private volatile Boolean shutdown;
        Public Idleconnectionevictor (Httpclientconnectionmanager connmgr) {this.connmgr = Connmgr;
                    } @Override public void Run () {try {while (!shutdown) {
                        Synchronized (this) {Wait (5000);
                    Close the failed connection connmgr.closeexpiredconnections (); }}} catch (InterruptedexCeption ex) {//end}} public void Shutdown () {shutdown = true;
            Synchronized (this) {notifyall ();
 }
        }
    }

}

Set Request Parameters

integration of httpclient and spring

<beans xmlns= "Http://www.springframework.org/schema/beans"
    xmlns:context= "http://www.springframework.org /schema/context "xmlns:p=" http://www.springframework.org/schema/p "
    xmlns:aop="/http/ Www.springframework.org/schema/aop "xmlns:tx=" http://www.springframework.org/schema/tx "
    xmlns:xsi="/http/ Www.w3.org/2001/XMLSchema-instance "
    xsi:schemalocation=" Http://www.springframework.org/schema/beans/http Www.springframework.org/schema/beans/spring-beans-4.0.xsd
    Http://www.springframework.org/schema/context http