基于HttpClient4.5.1实现Http访问工具类

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本工具类基于httpclient4.5.1实现

<groupId>org.apache.httpcomponents</groupId>

<artifactId>httpclient</artifactId>

</dependency>

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URISyntaxException;
import java.util.ArrayList;
import java.util.Map;import org.apache.http.HttpEntity;
import org.apache.http.NameValuePair;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.entity.UrlEncodedFormEntity;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpRequestBase;
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.impl.conn.PoolingHttpClientConnectionManager;
import org.apache.http.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;/**
*
* @author Nan 2015-11
*/
public class HttpClientUtil {
private static PoolingHttpClientConnectionManager cm;
private static String EMPTY_STR = "";
private static String UTF_8 = "UTF-8"; private static void init() {
if (cm == null) {
cm = new PoolingHttpClientConnectionManager();
cm.setMaxTotal(50);// 整个连接池最大连接数
cm.setDefaultMaxPerRoute(5);// 每路由最大连接数，默认值是2
}
} /**
* 通过连接池获取HttpClient
*
* @return
*/
private static CloseableHttpClient getHttpClient() {
init();
return HttpClients.custom().setConnectionManager(cm).build();
} /**
*
* @param url
* @return
*/
public static String httpGetRequest(String url) {
HttpGet httpGet = new HttpGet(url);
return getResult(httpGet);
} public static String httpGetRequest(String url, Map<String, Object> params) throws URISyntaxException {
URIBuilder ub = new URIBuilder();
ub.setPath(url); ArrayList<NameValuePair> pairs = covertParams2NVPS(params);
ub.setParameters(pairs); HttpGet httpGet = new HttpGet(ub.build());
return getResult(httpGet);
} public static String httpGetRequest(String url, Map<String, Object> headers, Map<String, Object> params)
throws URISyntaxException {
URIBuilder ub = new URIBuilder();
ub.setPath(url); ArrayList<NameValuePair> pairs = covertParams2NVPS(params);
ub.setParameters(pairs); HttpGet httpGet = new HttpGet(ub.build());
for (Map.Entry<String, Object> param : headers.entrySet()) {
httpGet.addHeader(param.getKey(), String.valueOf(param.getValue()));
}
return getResult(httpGet);
} public static String httpPostRequest(String url) {
HttpPost httpPost = new HttpPost(url);
return getResult(httpPost);
} public static String httpPostRequest(String url, Map<String, Object> params) throws UnsupportedEncodingException {
HttpPost httpPost = new HttpPost(url);
ArrayList<NameValuePair> pairs = covertParams2NVPS(params);
httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8));
return getResult(httpPost);
} public static String httpPostRequest(String url, Map<String, Object> headers, Map<String, Object> params)
throws UnsupportedEncodingException {
HttpPost httpPost = new HttpPost(url); for (Map.Entry<String, Object> param : headers.entrySet()) {
httpPost.addHeader(param.getKey(), String.valueOf(param.getValue()));
} ArrayList<NameValuePair> pairs = covertParams2NVPS(params);
httpPost.setEntity(new UrlEncodedFormEntity(pairs, UTF_8)); return getResult(httpPost);
} private static ArrayList<NameValuePair> covertParams2NVPS(Map<String, Object> params) {
ArrayList<NameValuePair> pairs = new ArrayList<NameValuePair>();
for (Map.Entry<String, Object> param : params.entrySet()) {
pairs.add(new BasicNameValuePair(param.getKey(), String.valueOf(param.getValue())));
} return pairs;
} /**
* 处理Http请求
*
* @param request
* @return
*/
private static String getResult(HttpRequestBase request) {
// CloseableHttpClient httpClient = HttpClients.createDefault();
CloseableHttpClient httpClient = getHttpClient();
try {
CloseableHttpResponse response = httpClient.execute(request);
// response.getStatusLine().getStatusCode();
HttpEntity entity = response.getEntity();
if (entity != null) {
// long len = entity.getContentLength();// -1 表示长度未知
String result = EntityUtils.toString(entity);
response.close();
// httpClient.close();
return result;
}
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
} finally { } return EMPTY_STR;
}}

Json版本

import net.sf.json.JSONObject;
import org.apache.commons.httpclient.HttpStatus;
import org.apache.http.HttpResponse;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.DefaultHttpClient;
import org.apache.http.util.EntityUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.io.IOException;
import java.net.URLDecoder;public class HttpRequestUtils {
private static Logger logger = LoggerFactory.getLogger(HttpRequestUtils.class); //日志记录 /**
* httpPost
* @param url 路径
* @param jsonParam 参数
* @return
*/
public static JSONObject httpPost(String url,JSONObject jsonParam){
return httpPost(url, jsonParam, false);
} /**
* post请求
* @param url url地址
* @param jsonParam 参数
* @param noNeedResponse 不需要返回结果
* @return
*/
public static JSONObject httpPost(String url,JSONObject jsonParam, boolean noNeedResponse){
//post请求返回结果
DefaultHttpClient httpClient = new DefaultHttpClient();
JSONObject jsonResult = null;
HttpPost method = new HttpPost(url);
try {
if (null != jsonParam) {
//解决中文乱码问题
StringEntity entity = new StringEntity(jsonParam.toString(), "utf-8");
entity.setContentEncoding("UTF-8");
entity.setContentType("application/json");
method.setEntity(entity);
}
HttpResponse result = httpClient.execute(method);
url = URLDecoder.decode(url, "UTF-8");
/**请求发送成功，并得到响应**/
if (result.getStatusLine().getStatusCode() == 200) {
String str = "";
try {
/**读取服务器返回过来的json字符串数据**/
str = EntityUtils.toString(result.getEntity());
if (noNeedResponse) {
return null;
}
/**把json字符串转换成json对象**/
jsonResult = JSONObject.fromObject(str);
} catch (Exception e) {
logger.error("post请求提交失败:" + url, e);
}
}
} catch (IOException e) {
logger.error("post请求提交失败:" + url, e);
}
return jsonResult;
} /**
* 发送get请求
* @param url 路径
* @return
*/
public static JSONObject httpGet(String url){
//get请求返回结果
JSONObject jsonResult = null;
try {
DefaultHttpClient client = new DefaultHttpClient();
//发送get请求
HttpGet request = new HttpGet(url);
HttpResponse response = client.execute(request); /**请求发送成功，并得到响应**/
if (response.getStatusLine().getStatusCode() == HttpStatus.SC_OK) {
/**读取服务器返回过来的json字符串数据**/
String strResult = EntityUtils.toString(response.getEntity());
/**把json字符串转换成json对象**/
jsonResult = JSONObject.fromObject(strResult);
url = URLDecoder.decode(url, "UTF-8");
} else {
logger.error("get请求提交失败:" + url);
}
} catch (IOException e) {
logger.error("get请求提交失败:" + url, e);
}
return jsonResult;
}
}