http四种请求（get/post/delete/put）
1、明确http请求需要引入的jar
2、方法例子如下：
package com.cmos.clbim.web.util;
import java.io.IOException;
import java.nio.charset.Charset;
import java.util.HashMap;
import java.util.Map;
import org.apache.http.HttpResponse;
import org.apache.http.client.ClientProtocolException;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.HttpDelete;
import org.apache.http.client.methods.HttpGet;
import org.apache.http.client.methods.HttpPost;
import org.apache.http.client.methods.HttpPut;
import org.apache.http.entity.ContentType;
import org.apache.http.entity.StringEntity;
import org.apache.http.impl.client.CloseableHttpClient;
import org.apache.http.impl.client.HttpClients;
import org.apache.http.protocol.HTTP;
import org.apache.http.util.EntityUtils;
import com.cmos.core.logger.Logger;
import com.cmos.core.logger.LoggerFactory;
import net.sf.json.JSONObject;
public class HttpClientUtil {
private static Logger LOGGER = LoggerFactory.getActionLog(HttpClientUtil.class);
private static final String APPLICATION_JSON = "application/json";
// private static final String APPLICATION_JSON = "application/json;charset="+"\""+"UTF-8"+"\"";
// private static final String CONTENT_TYPE_TEXT_JSON = "text/json";
/**
*
* @Title : httpPost
* @Description: TODO
* @param url
* @param jsonObject
* @return : String
* @author :
* Create Date : 2017-9-21 下午8:51:09
* @throws
*/
public static String httpPost(String url, String jsonObject) {
CloseableHttpClient httpClient = null;
Map resultMap = new HashMap();
resultMap.put("errorMsg", "下发连接异常");
JSONObject js = JSONObject.fromObject(resultMap);
String result = "";
try {
LOGGER.info("httpPost => ***---------------发送接口机url:------------------------------------"+url);
LOGGER.info("httpPost => ***---------------json Content-Type:---------------"+APPLICATION_JSON);
LOGGER.info("httpPost => ***---------------发送接口机json--------------------------"+jsonObject);
//设置超时时间
RequestConfig defaultRequestConfig = RequestConfig.custom()
.setSocketTimeout(40000)
.setConnectTimeout(40000)
.setConnectionRequestTimeout(40000)
.build();
RequestConfig requestConfig = RequestConfig.copy(defaultRequestConfig).build();
httpClient = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig).build();
// httpClient.getParams().setParameter(CoreConnectionPNames.CONNECTION_TIMEOUT, 40000);
// httpClient.getParams().setParameter(CoreConnectionPNames.SO_TIMEOUT, 40000);
HttpPost httpPost = new HttpPost(url);
//设置hearder信息
httpPost.addHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON);
// StringEntity se = new StringEntity(encoderJson);
// StringEntity se = new StringEntity(json);
// StringEntity se = new StringEntity(jsonObject,APPLICATION_JSON,"utf-8");
StringEntity se = new StringEntity(jsonObject, ContentType.APPLICATION_JSON);
// se.setContentType(CONTENT_TYPE_TEXT_JSON);
// se.setContentEncoding(new BasicHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON));
httpPost.setConfig(requestConfig);
httpPost.setEntity(se);
HttpResponse response;
response = httpClient.execute(httpPost);
//判定返回状态是否成功
int flag = response.getStatusLine().getStatusCode();
if(flag == 200){
LOGGER.info("httpPost => ***---------------接口机连接成功------------***");
//获取返回值
//如果是下载文件,可以用response.getEntity().getContent()返回InputStream
//处理乱码
//result=new String(result.getBytes("ISO-8859-1"),"GBK");//网页编码为GBK
result = EntityUtils.toString(response.getEntity(),Charset.defaultCharset());
}else{
result = js.toString();
LOGGER.info("httpPost => ***---------------接口机连接失败------------***");
}
} catch (ClientProtocolException e) {
result = js.toString();
LOGGER.error("httpPost => ***---------------接口机连接异常------------ClientProtocolException",e);
} catch (IOException e) {
result = js.toString();
LOGGER.error("httpPost => ***---------------接口机连接异常------------IOException",e);
}finally{
if(httpClient != null){
try {
httpClient.close();
} catch (IOException e) {
LOGGER.error("httpPost => 关闭失败"+ e);
}
}
}
LOGGER.info("httpPost => ***---------------接口机返回值------------------------***"+result);
return result;
}
/**
*
* @Title : httpPut
* @Description: TODO
* @param url
* @param jsonObject
* @return : String
* @author :
* Create Date : 2017-9-22 上午11:28:26
*/
public static String httpPut(String url, String jsonObject) {
CloseableHttpClient httpClient = null;
Map resultMap = new HashMap();
resultMap.put("errorMsg", "下发连接异常");
JSONObject js = JSONObject.fromObject(resultMap);
String result = "";
try {
LOGGER.info("httpPut => ***---------------发送接口机url:------------------------------------"+url);
LOGGER.info("httpPut => ***---------------json Content-Type:---------------"+APPLICATION_JSON);
LOGGER.info("httpPut => ***---------------发送接口机json--------------------------"+jsonObject);
//设置超时时间
RequestConfig defaultRequestConfig = RequestConfig.custom()
.setSocketTimeout(40000)
.setConnectTimeout(40000)
.setConnectionRequestTimeout(40000)
.build();
RequestConfig requestConfig = RequestConfig.copy(defaultRequestConfig).build();
httpClient = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig).build();
HttpPut httpPut = new HttpPut(url);
//设置hearder信息
httpPut.addHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON);
StringEntity se = new StringEntity(jsonObject, ContentType.APPLICATION_JSON);
httpPut.setConfig(requestConfig);
httpPut.setEntity(se);
HttpResponse response;
response = httpClient.execute(httpPut);
//判定返回状态是否成功
int flag = response.getStatusLine().getStatusCode();
if(flag == 200){
LOGGER.info("httpPut => ***---------------接口机连接成功------------***");
result = EntityUtils.toString(response.getEntity(),Charset.defaultCharset());
}else{
result = js.toString();
LOGGER.info("httpPut => ***---------------接口机连接失败------------***");
}
} catch (ClientProtocolException e) {
result = js.toString();
LOGGER.error("httpPut => ***---------------接口机连接异常------------ClientProtocolException",e);
} catch (IOException e) {
result = js.toString();
LOGGER.error("httpPut => ***---------------接口机连接异常------------IOException",e);
}finally{
if(httpClient != null){
try {
httpClient.close();
} catch (IOException e) {
LOGGER.error("httpPut => 关闭失败"+e);
}
}
}
LOGGER.info("httpPut => ***---------------接口机返回值------------------------***"+result);
return result;
}
/**
*
* @Title : httpGet
* @Description: TODO
* @param url Rest API URL
* @return : String
* @author :
* Create Date : 2017-9-22 下午4:52:06
*/
public static String httpGet(String url) {
CloseableHttpClient httpClient = null;
Map resultMap = new HashMap();
resultMap.put("errorMsg", "下发连接异常");
JSONObject js = JSONObject.fromObject(resultMap);
String result = "";
try {
LOGGER.info("httpPut => ***---------------发送接口机url:------------------------------------"+url);
LOGGER.info("httpPut => ***---------------json Content-Type:---------------"+APPLICATION_JSON);
//设置超时时间
RequestConfig defaultRequestConfig = RequestConfig.custom()
.setSocketTimeout(40000)
.setConnectTimeout(40000)
.setConnectionRequestTimeout(40000)
.build();
RequestConfig requestConfig = RequestConfig.copy(defaultRequestConfig).build();
httpClient = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig).build();
HttpGet httpGet = new HttpGet(url);
//设置hearder信息
httpGet.addHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON);
httpGet.setConfig(requestConfig);
HttpResponse response;
response = httpClient.execute(httpGet);
//判定返回状态是否成功
int flag = response.getStatusLine().getStatusCode();
if(flag == 200){
LOGGER.info("httpGet => ***---------------接口机连接成功------------***");
result = EntityUtils.toString(response.getEntity(),Charset.defaultCharset());
}else{
result = js.toString();
LOGGER.info("httpGet => ***---------------接口机连接失败------------***");
}
} catch (ClientProtocolException e) {
result = js.toString();
LOGGER.error("httpGet => ***---------------接口机连接异常------------ClientProtocolException",e);
} catch (IOException e) {
result = js.toString();
LOGGER.error("httpGet => ***---------------接口机连接异常------------IOException",e);
}finally{
if(httpClient != null){
try {
httpClient.close();
} catch (IOException e) {
LOGGER.error("httpGet => 关闭失败"+ e);
}
}
}
LOGGER.info("httpGet => ***---------------接口机返回值------------------------***"+result);
return result;
}
public static String httpDelete(String url) {
CloseableHttpClient httpClient = null;
Map resultMap = new HashMap();
resultMap.put("errorMsg", "下发连接异常");
JSONObject js = JSONObject.fromObject(resultMap);
String result = "";
try {
LOGGER.info("httpDelete => ***---------------发送接口机url:------------------------------------"+url);
LOGGER.info("httpDelete => ***---------------json Content-Type:---------------"+APPLICATION_JSON);
//设置超时时间
RequestConfig defaultRequestConfig = RequestConfig.custom()
.setSocketTimeout(40000)
.setConnectTimeout(40000)
.setConnectionRequestTimeout(40000)
.build();
RequestConfig requestConfig = RequestConfig.copy(defaultRequestConfig).build();
httpClient = HttpClients.custom().setDefaultRequestConfig(defaultRequestConfig).build();
HttpDelete httpDelete = new HttpDelete(url);
//设置hearder信息
httpDelete.addHeader(HTTP.CONTENT_TYPE, APPLICATION_JSON);
httpDelete.setConfig(requestConfig);
HttpResponse response;
response = httpClient.execute(httpDelete);
//判定返回状态是否成功
int flag = response.getStatusLine().getStatusCode();
if(flag == 200){
LOGGER.info("httpDelete => ***---------------接口机连接成功------------***");
result = EntityUtils.toString(response.getEntity(),Charset.defaultCharset());
}else{
result = js.toString();
LOGGER.info("httpDelete => ***---------------接口机连接失败------------***");
}
} catch (ClientProtocolException e) {
result = js.toString();
LOGGER.error("httpDelete => ***---------------接口机连接异常------------ClientProtocolException",e);
} catch (IOException e) {
result = js.toString();
LOGGER.error("httpDelete => ***---------------接口机连接异常------------IOException",e);
}finally{
if(httpClient != null){
try {
httpClient.close();
} catch (IOException e) {
LOGGER.error("httpDelete => 关闭失败"+ e);
}
}
}
LOGGER.info("httpDelete => ***---------------接口机返回值------------------------***"+result);
return result;
}
}