java发起post请求—— body有参/无参

import org.apache.http.HttpEntity;
import org.apache.http.HttpStatus;
import org.apache.http.client.config.RequestConfig;
import org.apache.http.client.methods.CloseableHttpResponse;
import org.apache.http.client.methods.HttpPost;
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.message.BasicNameValuePair;
import org.apache.http.util.EntityUtils;
1     /** 
2 * 发起post请求 有参数的情况
3 * @paramurl
4 * @paramparams
5 * @paramcodePage
6 * @return
7 * @throwsException
8      */
9     private synchronized static String postData(String url, Map<String, Object> params, String codePage) throwsException {
10          //创建post请求对象
11         HttpPost httppost = newHttpPost(url);
12         //获取到httpclient客户端
13         CloseableHttpClient httpclient =HttpClients.createDefault();
14         try{
15             //创建参数集合
16             List<BasicNameValuePair> list = new ArrayList<BasicNameValuePair>();
17             //添加请求头参数
18             if(url.equals(GetOlapDataUrl)) {
19                 httppost.addHeader("Content-Type", "application/json");
20                 httppost.addHeader("accessToken",params.get("accessToken").toString());
21 }
22             //设置请求的一些配置设置，主要设置请求超时，连接超时等参数
23             RequestConfig requestConfig =RequestConfig.custom()
24                 .setConnectTimeout(10000).setConnectionRequestTimeout(10000).setSocketTimeout(10000)
25 .build();
26 httppost.setConfig(requestConfig);
27             //添加参数
28             httppost.setEntity(new StringEntity(JSONObject.toJSONString(params), ContentType.create("application/json", "utf-8")));
29             //请求结果
30             String resultString = "";
31             //启动执行请求，并获得返回值
32             CloseableHttpResponse response =httpclient.execute(httppost);
33             if (response.getStatusLine().getStatusCode() ==HttpStatus.SC_OK) {
34                 //获取请求响应结果
35                 HttpEntity entity =response.getEntity();
36                 if (entity != null) {
37                     //将响应内容转换为指定编码的字符串
38                     resultString = EntityUtils.toString(entity, "UTF-8");
39                     System.out.printf("Response content:{}", resultString);
40                     returnresultString;
41 }
42             } else{
43                 System.out.println("请求失败！");
44                 returnresultString;
45 }
46         } catch(Exception e) {
47             throwe;
48         } finally{
49 httpclient.close();
50 }
51         return null;
52 }
53     
54     /**
55 * 发起post请求 没有任何参数的情况
56 *
57 * @paramurl  请求的目标url地址
58 * @paramotherParam 其他参数
59 * @paramdata 请求数据
60 * @return将响应结果转换成string返回
61 * @throwsIOException 可能出现的异常
62      */
63     private static String postMsg(String url, String otherParam) throwsIOException {
64         //根据url地址发起post请求
65         HttpPost httppost = newHttpPost(url);
66         //获取到httpclient客户端
67         CloseableHttpClient httpclient =HttpClients.createDefault();
68         try{
69             //设置请求的一些头部信息
70             httppost.addHeader("Content-Type", "application/json");
71             httppost.addHeader("accessToken", otherParam);
72             //设置请求的一些配置设置，主要设置请求超时，连接超时等参数
73             RequestConfig requestConfig =RequestConfig.custom()
74                 .setConnectTimeout(10000).setConnectionRequestTimeout(10000).setSocketTimeout(10000)
75 .build();
76 httppost.setConfig(requestConfig);
77             //执行请求
78             CloseableHttpResponse response =httpclient.execute(httppost);
79             //请求结果
80             String resultString = "";
81             if (response.getStatusLine().getStatusCode() ==HttpStatus.SC_OK) {
82                 //获取请求响应结果
83                 HttpEntity entity =response.getEntity();
84                 if (entity != null) {
85                     //将响应内容转换为指定编码的字符串
86                     resultString = EntityUtils.toString(entity, "UTF-8");
87                     System.out.printf("Response content:{}", resultString);
88                     returnresultString;
89 }
90             } else{
91                 System.out.println("请求失败！");
92                 returnresultString;
93 }
94         } catch(Exception e) {
95             throwe;
96         } finally{
97 httpclient.close();
98 }
99         return null;
100     }