图解springboot后端发送HttpGet和HttpPost请求
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文章由作者:张耀峰 结合自己生产中的使用经验整理,最终形成简单易懂的文章
写作不易,转载请注明,谢谢!
代码案例地址: ?https://github.com/Mydreamandreality/sparkResearch
图解springboot后端发送HttpGet和HttpPost请求
我们要实现的功能如下:
SpringBoot后端请求get和post接口,并且携带请求参数,对返回的JSON进行解析
我本地的开发环境是:SpringBoot2.1,发起请求的工具是:Apache,Http.client
一: HttpPost请求,提交JSON参数,且解析返回的JSON案例
完整代码案例:
@Scheduled(cron = Settings.cron)
public void getUpdateAsset() {
Long milliSecond = LocalDateTime.now().toInstant(ZoneOffset.of("+8")).toEpochMilli() - 300000;
String jsonParam = " { \"update\" : " + milliSecond + "}";
String headersAuthor = sendPostUrlGetLoginToken("operator");
CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
CloseableHttpResponse closeableHttpResponse;
try {
HttpPost httpPost = new HttpPost(updateAssetUrl);
httpPost.setHeader("Authorization", "Bearer " + headersAuthor);
httpPost.addHeader("Content-Type", "application/json;charset=UTF-8");
StringEntity entity = new StringEntity(jsonParam, ContentType.create("text/json", "UTF-8"));
httpPost.setEntity(entity);
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();
httpPost.setConfig(requestConfig);
closeableHttpResponse = closeableHttpClient.execute(httpPost);
int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();
if (statusCode != HttpStatus.SC_OK) {
//TODO:状态码非200代表没有正常返回,此处处理你的业务
}
HttpEntity httpEntity = closeableHttpResponse.getEntity();
String asset_synchronization = EntityUtils.toString(httpEntity, "UTF-8");
JSONArray jsonArray = JSONArray.parseArray(asset_synchronization);
if (jsonArray.size() > 0) {
//TODO:判断返回的json数组是否不为空,此处即可处理你的业务
}
} catch (IOException e) {
e.printStackTrace();
}
}
图解HttpPost请求代码案例:
- 在第一步,首先生成我们需要提交的参数,
sendPostUrlGetLoginToken是我获取参数的方法,无需关注 - 在第二步,我们新建Http的client客户端,并且生成HttpPost请求方式,此处如果post请求发送body的json参数,需要指定
httpPost.addHeader("Content-Type", "application/json;charset=UTF-8");,通过setEntity()把我们要提交的json参数写入post请求 - 在第三步,执行httpPost请求,并且获取接口返回的状态码,此处我的需求是:非200的状态码一律抛出token失效异常,你们可以根据自己的需求开发
- 第四步,就是最后一步,是处理200正常状态码的代码块,通过
getEntity()获取接口返回给我的json数据,进行解析,200的code码如何处理和数据如何解析看自己的业务决定
二: HttpGet请求,提交Params参数,且解析返回的JSON案例
完整代码案例:
public String sendPostUrlGetLoginToken(String username) {
//此处是我获取请求参数的方法,请忽略
String[] author = authorApi();
List<NameValuePair> nameValuePairs = new LinkedList<>();
nameValuePairs.add(new BasicNameValuePair("username", "operator"));
nameValuePairs.add(new BasicNameValuePair("timestamp", author[0]));
nameValuePairs.add(new BasicNameValuePair("nonce", author[1]));
nameValuePairs.add(new BasicNameValuePair("signature", author[2]));
CloseableHttpClient closeableHttpClient = HttpClients.createDefault();
CloseableHttpResponse closeableHttpResponse;
String paramStr;
try {
paramStr = EntityUtils.toString(new UrlEncodedFormEntity(nameValuePairs));
HttpPost httpPost = new HttpPost(appendString(tokenUrl, paramStr));
RequestConfig requestConfig = RequestConfig.custom().setSocketTimeout(2000).setConnectTimeout(2000).build();
httpPost.setConfig(requestConfig);
//sendPostURL.
closeableHttpResponse = closeableHttpClient.execute(httpPost);
//HttpCode
int statusCode = closeableHttpResponse.getStatusLine().getStatusCode();
if (statusCode != HttpStatus.SC_OK) {
throw new GunsException(BizExceptionEnum.TOKEN_ERROR);
}
//此处处理状态码200
HttpEntity httpEntity = closeableHttpResponse.getEntity();
String isLogin = EntityUtils.toString(httpEntity, "UTF-8");
return isLogin.substring(1, isLogin.length() - 1);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 把请求参数通过?拼接
* 示例: 1.1.1.1:80/?uname=1&token=1
*/
public String appendString(String url, String paramStr) {
StringBuffer stringBuffer = new StringBuffer();
stringBuffer.append(url);
stringBuffer.append("?");
stringBuffer.append(paramStr);
return stringBuffer.toString();
}
图解HttpGet请求案例:
- 其实代码的思路和HttpPost的请求时一致的,只是我们在提交param参数时,需要写入
List<NameValuePair>,还是提交请求,并且判断状态码,接着通过状态码实现自己的业务
有任何问题可以留言交流,我看到会第一时间回复
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