实习期结束，总结一下实习时遇到的一些以前不常用的代码，以方便下次用到时取用，代码不涉及公司机密，需要根据自己的需要进行一定的修改！如有错误欢迎指正！
一个需求是项目的某些接口需要调用外部的接口，由于发送的数据格式各不相同，写了一个工具类根据需要调用，以下是工具类中几个函数。
1.json格式
private static String sendJson(String json, String url) { // json表示发送的数据，url表示请求的路径 // result 是标识调用后该url返回的结果
String result = null;
try {
CloseableHttpClient client = HttpClients.createDefault();
HttpPost post = new HttpPost(url);
post.addHeader("Authorization", "Basic YWRtaW46");
StringEntity s = new StringEntity(json, "utf-8");
s.setContentType(new BasicHeader(HTTP.CONTENT_TYPE,
"application/json"));
post.setEntity(s);
// 发送请求
HttpResponse httpResponse = null;
httpResponse = client.execute(post);
// 获取响应输入流
InputStream inStream = httpResponse.getEntity().getContent();
BufferedReader reader = new BufferedReader(new InputStreamReader(
inStream, "utf-8"));
StringBuilder strber = new StringBuilder();
String line;
while ((line = reader.readLine()) != null) {
strber.append(line + "\n");
}
inStream.close();
result = strber.toString();
} catch (IOException e) {
e.printStackTrace();
}
return result;
}
2.x-www-form-urlencoded格式
public static String sendXwww(String json, String url) {
// 设置请求头
HttpHeaders headers = new HttpHeaders();
headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
RestTemplate restTemplate = new RestTemplate();
MultiValueMap forms = new LinkedMultiValueMap();
JSONObject object = JSONObject.parseObject(json);
for (String key : object.keySet()) {
forms.put(key, Collections.singletonList(object.getString(key)));
}
HttpEntity> httpEntity = new HttpEntity>(forms, headers);
//获取返回数据
String body = restTemplate.postForObject(url, httpEntity, String.class);
return body;
}
3.发送文件与其他参数格式
public static String senFile(String url, String filepath, Map paramMap) { // filepath表示文件路径 paramMap表示其他参数
// 创建httpPost
HttpPost httpPost = new HttpPost(url);
CloseableHttpClient httpClient = null;
CloseableHttpResponse response = null;
org.apache.http.HttpEntity entity = null;
String responseContent = null;
try {
File file = new File(filepath);
// 设置参数
MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
//调用的url的文件的参数是file 需要根据调用的url需要的参数进行修改
multipartEntityBuilder.addBinaryBody("file", file);//表单中其他参数
if (paramMap != null) {
for (Map.Entry entry : paramMap.entrySet()) {
multipartEntityBuilder.addPart(entry.getKey(), new StringBody(entry.getValue(), ContentType.create("text/plain", Consts.UTF_8)));
}
}
org.apache.http.HttpEntity reqEntity = multipartEntityBuilder.build();
httpPost.setEntity(reqEntity);
// 创建默认的httpClient实例.
httpClient = HttpClients.createDefault();
// 执行请求
response = httpClient.execute(httpPost);
entity = response.getEntity();
responseContent = EntityUtils.toString(entity, "UTF-8");
} catch (Exception e) {
logger.error("<<<<<< HttpUtil sendData error cause {}", e);
} finally {
try {
// 关闭连接,释放资源
if (response != null) {
response.close();
}
if (httpClient != null) {
httpClient.close();
}
} catch (IOException e) {
logger.error("<<<<<< HttpUtil sendData error cause {}", e);
}
}
return responseContent;
}
Original: https://www.cnblogs.com/boboray/p/16720646.html
Author: 啵啵ray
Title: JAVA调用远程接口时模拟发送数据-json格式、x-www-form-urlencoded格式、文件+参数格式
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