JAVA HttpClient(普通参数、JSON格式参数)

完整示例：点击下载

代码如下：

import com.alibaba.fastjson.JSONObject;
import org.apache.http.HttpEntity;
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.entity.StringEntity;
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;

import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
* HttpClient客户端
* Created by itdragons on 2017-8-8.
*/
public class HttpClient {

/**
* post请求-json参数
*/
public static String postHttp(String url, JSONObject paramJson) {
return postHttp(url, new StringEntity(paramJson.toString(),"UTF-8"));
}

/**
* post请求-参数
*/
public static String postHttp(String url, Map<String, String> paramMap) throws UnsupportedEncodingException {
List<NameValuePair> params = new ArrayList<NameValuePair>();
if(paramMap != null){
for(Map.Entry<String,String> entry : paramMap.entrySet()){
params.add(new BasicNameValuePair(entry.getKey(), entry.getValue()));
}
}
return postHttp(url, new UrlEncodedFormEntity(params, "UTF-8"));
}

/**
* post请求
*/
private static String postHttp(String url, HttpEntity formEntity) {
CloseableHttpClient client = null;
HttpPost post = null;
String result = "";
try {
client = HttpClients.createDefault();
//HttpClient httpClient = new DefaultHttpClient();
post = new HttpPost(url);
post.setEntity(formEntity);
HttpResponse resp = client.execute(post);
HttpEntity entity = resp.getEntity();
result = EntityUtils.toString(entity, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭连接，释放资源
//httpClient.getConnectionManager().shutdown();httpClient = null;
if (post != null) {
post.releaseConnection();
}
if (client != null) {
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}

/**
* get请求
*/
public static String getHttp(String url) {
CloseableHttpClient client = null;
HttpGet get = null;
String result = "";
try {
client = HttpClients.createDefault();
get = new HttpGet(url);
HttpResponse resp = client.execute(get);
HttpEntity entity = resp.getEntity();
result = EntityUtils.toString(entity, "UTF-8");
} catch (Exception e) {
e.printStackTrace();
} finally {
//关闭连接，释放资源
if (get != null) {
get.releaseConnection();
}
if (client != null) {
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}
}
return result;
}
}