java模拟httppost和httpget请求工具类

java模拟httppost和httpget请求工具类中的问题：

java.lang.NoClassDefFoundError: org/apache/http/params/SyncBasicHttpParams

这是因为项目中引用的是httpcore-4.0.jar,而SyncBasicHttpParams是4.1才开始有的，所以，换一个版本就好了。

package com.testhttp;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.http.HttpResponse;
import org.apache.http.NameValuePair;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpUriRequest;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.params.BasicHttpParams;
import org.apache.http.params.HttpConnectionParams;
import org.apache.http.params.HttpParams;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;

public class testpost {

private DefaultHttpClient httpConn;

public testpost()
{
if (httpConn == null) {
httpConn = new DefaultHttpClient();
}
}

public HttpResponse execute(HttpUriRequest request) throws Exception
{
if (httpConn == null) {
httpConn = new DefaultHttpClient();
}
HttpParams params = httpConn.getParams();
if(params==null){
params = new BasicHttpParams();
}
//连接超时时间
HttpConnectionParams.setConnectionTimeout(params, 10*1000);
//sockect连接超时时间40秒
HttpConnectionParams.setSoTimeout(params, 40*1000);
httpConn.setParams(params);
HttpResponse httpResponse = httpConn.execute(request);
return httpResponse;
}

public String doGet(String url,Map header) throws Exception {
HttpGet get = new HttpGet(url);
if(header!=null){
Set set = header.keySet();
for(Iterator iter = set.iterator(); iter.hasNext();)
{
String key = (String)iter.next();
String value = (String)header.get(key);
get.setHeader(key, value);
}
}
HttpResponse httpResponse = this.execute(get);
String retSrc = EntityUtils.toString(httpResponse.getEntity(),
HTTP.UTF_8);
return retSrc;
}

public String doPost(String url,Map header, Map param) throws Exception
{
//声明一个httppost请求
HttpPost post = new HttpPost(url);
//存放请求路径后面的参数对
List<NameValuePair> nameValuePair = new ArrayList<NameValuePair>();
if (param != null)
{
//得到键集合
Set<String> key = param.keySet();
//遍历键集合，给name和value赋值，并把键值对赋值给了namevaluepair
for (Iterator it = key.iterator(); it.hasNext();) {
String name = (String) it.next();
String value = param.get(name) == null ? "" : ""
+ param.get(name);
nameValuePair.add(new BasicNameValuePair(name, value));
}
}
post.setEntity(new UrlEncodedFormEntity(nameValuePair, HTTP.UTF_8));
HttpResponse httpResponse = this.execute(post);
String retSrc = EntityUtils.toString(httpResponse.getEntity(),HTTP.UTF_8);
return retSrc;
}

public static void main(String[] args) throws Exception {
//https://uim.bangcommunity.com/APPLogin/getOfflineMsg
Map p = new HashMap();
p.put("username", "AB050909");
p.put("password", "123456a");
String str=new testpost().doPost("https://uim.bangcommunity.com/APPLogin/getOfflineMsg", null,p);
System.out.println(str);

//http://newsapi.xujm.com/topic/topicList
Map header=new HashMap();
header.put("userid", "068D83C3ED994131845E0748E85B67B6");
//String str2=new testpost().doGet("http://newsapi.xujm.com/topic/topicList",header);
//System.out.println(str2);
}
}