HTTP tool classes for Java

Import java.io.IOException;

Import java.io.UnsupportedEncodingException;
Import Java.net.URLEncoder;
Import Java.util.HashMap;
Import Java.util.Iterator;
Import Java.util.Map;
Import Java.util.Set;

Import org.apache.commons.httpclient.HttpClient;
Import org.apache.commons.httpclient.HttpException;
Import Org.apache.commons.httpclient.HttpStatus;
Import Org.apache.commons.httpclient.MultiThreadedHttpConnectionManager;
Import Org.apache.commons.httpclient.methods.GetMethod;
Import Org.apache.commons.httpclient.methods.PostMethod;
Import Org.apache.commons.logging.Log;
Import Org.apache.commons.logging.LogFactory;

Import Flexjson. JSON;

/**
* HTTP Tool class
*
* @author Yaonian
*
*/
public class Httputils {

private static log log = Logfactory.getlog (Httputils.class);

/**
* Define the encoding format UTF-8
*/
public static final String Url_param_decodecharset_utf8 = "UTF-8";

/**
* Define the encoding format GBK
*/
public static final String URL_PARAM_DECODECHARSET_GBK = "GBK";

private static final String Url_param_connect_flag = "&";

private static final String EMPTY = "";

private static Multithreadedhttpconnectionmanager ConnectionManager = null;

private static int connectiontimeout = 25000;

private static int sockettimeout = 25000;

private static int maxconnectionperhost = 20;

private static int maxtotalconnections = 20;

private static HttpClient client;

static{
ConnectionManager = new Multithreadedhttpconnectionmanager ();
Connectionmanager.getparams (). Setconnectiontimeout (ConnectionTimeout);
Connectionmanager.getparams (). Setsotimeout (Sockettimeout);
Connectionmanager.getparams (). Setdefaultmaxconnectionsperhost (Maxconnectionperhost);
Connectionmanager.getparams (). Setmaxtotalconnections (maxtotalconnections);
Client = new HttpClient (ConnectionManager);
}

/**
* Post mode submit data
* @param URL
* URL to be requested
* @param params
* The data to be submitted
* @param ENC
* Code
* @return
* Response Results
* @throws IOException
* IO exception
*/
public static string Urlpost (string url, map<string, string> params, string enc) {

String response = EMPTY;
Postmethod postmethod = null;
try {
Postmethod = new Postmethod (URL);
Postmethod.setrequestheader ("Content-type", "application/x-www-form-urlencoded;charset=" + enc);
Put the value of the form into Postmethod
set<string> KeySet = Params.keyset ();
for (String Key:keyset) {
String value = Params.get (key);
Postmethod.addparameter (key, value);
}
Executive Postmethod
int statusCode = Client.executemethod (Postmethod);
if (StatusCode = = HTTPSTATUS.SC_OK) {
Response = postmethod.getresponsebodyasstring ();
}else{
Log.error ("Response Status code =" + Postmethod.getstatuscode ());
}
}catch (HttpException e) {
Log.error ("A fatal exception could be a problem with the protocol or the returned content", E);
E.printstacktrace ();
}catch (IOException e) {
Log.error ("Network exception occurred", E);
E.printstacktrace ();
}finally{
if (Postmethod! = null) {
Postmethod.releaseconnection ();
Postmethod = null;
}
}

return response;
}

/**
* Get method to submit data
* @param URL
* URL to be requested
* @param params
* The data to be submitted
* @param ENC
* Code
* @return
* Response Results
* @throws IOException
* IO exception
*/
public static string Urlget (string url, map<string, string> params, string enc) {

String response = EMPTY;
GetMethod GetMethod = null;
StringBuffer Strttotalurl = new StringBuffer (EMPTY);

if (Strttotalurl.indexof ("?") = =-1) {
Strttotalurl.append (URL). Append ("?"). Append (GetUrl (params, enc));
} else {
Strttotalurl.append (URL). Append ("&"). Append (GetUrl (params, enc));
}
Log.debug ("Get request URL = \ n" + strttotalurl.tostring ());

try {
GetMethod = new GetMethod (strttotalurl.tostring ());
Getmethod.setrequestheader ("Content-type", "application/x-www-form-urlencoded;charset=" + enc);
Executive GetMethod
int statusCode = Client.executemethod (GetMethod);
if (StatusCode = = HTTPSTATUS.SC_OK) {
Response = getmethod.getresponsebodyasstring ();
}else{
Log.debug ("Response Status code =" + Getmethod.getstatuscode ());
}
}catch (HttpException e) {
Log.error ("A fatal exception could be a problem with the protocol or the returned content", E);
E.printstacktrace ();
}catch (IOException e) {
Log.error ("Network exception occurred", E);
E.printstacktrace ();
}finally{
if (GetMethod! = null) {
Getmethod.releaseconnection ();
GetMethod = null;
}
}

return response;
}

/**
* Generate URL string according to map
* @param map
* MAP
* @param valueenc
* URL encoding
* @return
* URL
*/
private static String GetUrl (map<string, string> Map, String valueenc) {

if (null = = Map | | map.keyset (). Size () = = 0) {
return (EMPTY);
}
StringBuffer url = new StringBuffer ();
set<string> keys = Map.keyset ();
for (iterator<string> it = Keys.iterator (); It.hasnext ();) {
String key = It.next ();
if (Map.containskey (key)) {
String val = map.get (key);
String str = val! = null? Val:empty;
try {
str = Urlencoder.encode (str, VALUEENC);
} catch (Unsupportedencodingexception e) {
E.printstacktrace ();
}
Url.append (Key). Append ("="). Append (str). append (Url_param_connect_flag);
}
}
String strURL = EMPTY;
strURL = Url.tostring ();
if (url_param_connect_flag.equals (EMPTY + Strurl.charat (strurl.length ()-1))) {
strURL = strurl.substring (0, Strurl.length ()-1);
}

return (strURL);
}

public static void Main (string[] args) {

String url = "http://192.168.1.7:9909/";//project path
String charset = "Utf-8"; Encoding format
String httporgcreatetest = URL + "Send"; Full path
map<string,string> Createmap = new hashmap<string,string> (); Parameter key-value pairs

Such as
Createmap.put ("Shebeihao", "01111");
Createmap.put ("StartTime", "2017-12-14 14:25:00");
Createmap.put ("EndTime", "2017-12-15 14:25:00");

Get method call
String urlget = Urlget (Httporgcreatetest, Createmap, CharSet);
SYSTEM.OUT.PRINTLN ("xxx" +urlget);
}

/*

Maven Import Rack Package

<dependency>
<groupId>commons-httpclient</groupId>
<artifactId>commons-httpclient</artifactId>
<version>3.1</version>
</dependency>

*/

}

HTTP tool classes for Java