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Java代碼發(fā)送post請求實(shí)現(xiàn)方式

更新時間：2026年05月09日 10:03:04 作者：胡大可呀

本文介紹了使用Java發(fā)送POST請求的方法,包括引用工具類、設(shè)置訪問地址、請求頭和json請求體,最后使用工具類發(fā)送請求并返回結(jié)果

1、首先引用工具類HttpClientUtil

/*
 * 利用HttpClient進(jìn)行post請求的工具類
 */
public class HttpClientUtil {
    public String doPost(String url, Map<String, String> headerMap, String jsonText, String charset) {
        HttpClient httpClient = null;
        HttpPost httpPost = null;
        String result = null;
        InputStream in = null;
        try {
            httpClient = SSLClientFactory.createSSLClientDefault();
            httpPost = new HttpPost(url);
            // 設(shè)置參數(shù)
            Iterator<Entry<String, String>> iterator = headerMap.entrySet().iterator();
            Entry<String, String> elem = null;
            while (iterator.hasNext()) {
                elem = iterator.next();
                httpPost.addHeader(elem.getKey(), elem.getValue());
            }
            if (StringUtils.isNotBlank(jsonText)) {
                byte[] bytes = jsonText.getBytes(HTTP.UTF_8);
                ByteArrayEntity se = new ByteArrayEntity(bytes);
                httpPost.setEntity(se);
            }
            HttpResponse response = httpClient.execute(httpPost);
            if (response != null) {
                HttpEntity resEntity = response.getEntity();
                if (resEntity != null) {
                    in=resEntity.getContent();
                    result = EntityUtils.toString(resEntity, charset);
                }
            }
        } catch (Exception ex) {
        }
        finally
        {
            if (in != null){
                try
                {
                    in.close ();
                }
                catch (IOException e)
                {
                    e.printStackTrace ();
                }
            }
        }
        return result;
    }
}

2、獲取訪問地址、請求頭、json格式的請求體

        //獲取接口地址
        String url="http://external.rmcp-zsh.bosafe.com/api/v1/ztexternal/user/change";
        //獲取請求頭
        Map<String, String> headerMap = new HashMap<String, String>();
        headerMap.put("appId", appId);
        headerMap.put("randomNumber",s);
        headerMap.put("timestamp", strTime);
        headerMap.put("signature", w );
        headerMap.put("Content-Type", "application/json");
        //獲取請求體
        JSONObject obj = new JSONObject();
        obj.put("appId", appId);
        //將待同步對象集合轉(zhuǎn)換為json數(shù)據(jù)
        JSONArray userList = JSONUtil.parseArray(split);
        //設(shè)置請求體參數(shù)
        obj.put("userList",userList);

3、利用工具類HttpClientUtil 訪問并返回結(jié)果

HttpClientUtil httpClientUtil = new HttpClientUtil();
//發(fā)送post請求
String results = httpClientUtil.doPost(url, headerMap, obj.toJSONString(), Constants.UTF8);
//返回結(jié)果
JSONObject resultJson = JSONObject.parseObject(results);
String status =resultJson.getString("status");