httpclient：與springmvc進行跨域傳輸，上傳檔案，攜帶引數——使用HttpPost方式
阿新 • • 發佈：2019-02-03
一.上傳檔案
1.HttpClient類
/** * @param file * @param url */ public static void uploadFileByHttpPost(File file, String url) { CloseableHttpClient client = HttpClients.custom().build(); try { HttpPost post = new HttpPost(url); FileBody fileBody = new FileBody(file); /* * 可以在MultipartEntityBuilder中新增多個part（ContentBody），用來傳遞多個引數 * ByteArrayBody * InputStreamBody * FileBody * StringBody */ HttpEntity entity = MultipartEntityBuilder.create().addPart("file", fileBody).build(); post.setEntity(entity); CloseableHttpResponse resp = client.execute(post); int status = resp.getStatusLine().getStatusCode(); if (status == 200) { Logger.getLogger(HttpClientUtil.class).info("上傳成功"); } else { Logger.getLogger(HttpClientUtil.class).info("上傳失敗"); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { client.close(); } catch (IOException e) { e.printStackTrace(); } } }
2.controller介面
@RequestMapping(params = "uploadFile") public void uploadFile(@RequestParam CommonsMultipartFile file) { File serverFile = new File("E:/to/" + file.getOriginalFilename()); try { FileUtils.writeByteArrayToFile(serverFile, file.getBytes()); } catch (IOException e) { e.printStackTrace(); } }
3.測試類
@Test
public void uploadFileByHttpPost() {
String url = PropUtil.configProp.getProperty("url") + "/httpClientController.do?uploadFile";
File file = new File("E:/from/test");
HttpClientUtil.uploadFileByHttpPost(file, url);
}二.上傳檔案並攜帶引數
1.HttpClient類
注：/** * @param file * @param url * @param params */ public static void sendFileAndParamsByHttpPost(File file, String url, Map<String, String> params) { CloseableHttpClient client = HttpClients.custom().build(); try { HttpPost post = new HttpPost(url); FileBody fileBody = new FileBody(file); MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create(); for (Entry<String, String> entry : params.entrySet()) { String key = entry.getKey(); String value = entry.getValue(); // multipartEntityBuilder.addTextBody(key, value); multipartEntityBuilder.addTextBody(key, value, ContentType.TEXT_PLAIN.withCharset("utf-8")); } HttpEntity entity = multipartEntityBuilder .addPart("file", fileBody) .build(); post.setEntity(entity); CloseableHttpResponse resp = client.execute(post); int status = resp.getStatusLine().getStatusCode(); if (status == 200) { Logger.getLogger(HttpClientUtil.class).info("上傳成功"); } else { Logger.getLogger(HttpClientUtil.class).info("上傳失敗"); } } catch (ClientProtocolException e) { e.printStackTrace(); } catch (IOException e) { e.printStackTrace(); } finally { try { client.close(); } catch (IOException e) { e.printStackTrace(); } } }
multipartEntityBuilder.addTextBody不設定編碼可能會中文亂碼2.controller介面
@RequestMapping(params = "sendFileAndParamsByHttpPost")
public void sendFileAndParamsByHttpPost(@RequestParam CommonsMultipartFile file, @RequestParam("userName") String username, @RequestParam String id, String sex) {
LoggerFactory.getLogger(getClass()).info("fileName: {}, userName: {}, id: {}, sex: {}", file.getOriginalFilename(), username, id, sex);
}3.測試類
@Test
public void sendFileAndParamsByHttpPost() {
String url = PropUtil.configProp.getProperty("url") + "/httpClientController.do?sendFileAndParamsByHttpPost";
File file = new File("E:/from/test");
Map<String, String> params = new HashMap<String, String>(3);
params.put("sex", "男");
params.put("id", "007");
params.put("userName", "張三");
HttpClientUtil.sendFileAndParamsByHttpPost(file, url, params);
}4.測試結果
// [2018-07-14 17:08:46] [INFO] fileName: test, userName: ??, id: 007, sex: ?
// [2018-07-14 17:14:31] [INFO] fileName: test, userName: 張三, id: 007, sex: 男第一條結果為未設定編碼的結果
第二條結果未設定編碼後
controller介面注意：
@RequestParam CommonsMultipartFile file, @RequestParam("userName") String username, @RequestParam String id, String sex若入參名與傳遞來的引數名一致，則可以不加@RequestParam
若入參名與傳遞來的引數名不一致，則需要@RequestParam("傳過來的引數名")
三.傳遞json，使用model接收
1.HttpClient類
/**
* 通過post請求以json格式傳送model
* @param t
* @param url
*/
public static <T> void sendDataJsonByPost(T t, String url) {
ObjectMapper mapper = new ObjectMapper();
String data = "";
try {
data = mapper.writeValueAsString(t);
} catch (JsonGenerationException e1) {
e1.printStackTrace();
} catch (JsonMappingException e1) {
e1.printStackTrace();
} catch (IOException e1) {
e1.printStackTrace();
}
CloseableHttpClient client = HttpClients.custom().build();
HttpPost post = new HttpPost(url);
try {
// 以entity形式攜帶引數
post.setEntity(new StringEntity(data, "UTF-8"));
// 設定頭資訊，以josn格式傳送
post.addHeader("Content-Type", "application/json");
CloseableHttpResponse resp = client.execute(post);
if (resp.getStatusLine().getStatusCode() == 200) {
Logger.getLogger(HttpClientUtil.class).info("傳送成功");
Logger.getLogger(HttpClientUtil.class).info(EntityUtils.toString(resp.getEntity()));
} else {
Logger.getLogger(HttpClientUtil.class).info("傳送失敗");
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
}2.controller
@RequestMapping(params = "sendDataJsonByPost", produces = MediaType.APPLICATION_JSON_VALUE)
public void sendDataJsonByPost(@RequestBody User user) {
LoggerFactory.getLogger(getClass()).info(user.toString());
}3.測試類
@Test
public void sendDataJsonByPost() {
User user = new User("張三", "1");
String url = PropUtil.configProp.getProperty("url") + "/httpClientController.do?sendDataJsonByPost";
HttpClientUtil.sendDataJsonByPost(user, url);
}4.測試結果
[2018-07-14 17:59:48] [INFO] User [userName=張三, id=1]
四.使用NameValuePair傳遞引數
1.HttpClient類
/**
* 以post方式進行請求，得到布林型別值
* @param url
* @param params
* @return
*/
public static boolean booleanReturnByPost(String url, List<NameValuePair> params) {
CloseableHttpClient client = HttpClients.custom().build();
HttpPost post = new HttpPost(url);
try {
post.setEntity(new UrlEncodedFormEntity(params));
CloseableHttpResponse resp = client.execute(post);
if (resp.getStatusLine().getStatusCode() == 200) {
// springmvc 返回值不能是布林型別，所以返回"true" or "false"，再進行轉換
// 使用EntityUtils將resp.getEntity()解析
if (Boolean.parseBoolean(EntityUtils.toString(resp.getEntity()))) {
return true;
}
}
} catch (UnsupportedEncodingException e) {
e.printStackTrace();
} catch (ClientProtocolException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
try {
client.close();
} catch (IOException e) {
e.printStackTrace();
}
return false;
}2.controller
@RequestMapping(params = "booleanReturnByPost")
public String booleanReturnByPost(String fileName, String userName) {
LoggerFactory.getLogger(getClass()).info("fileName: {}, userName: {}", fileName, userName);
if (userName == null) {
return "true";
}
return "false";
}3.測試類
@Test
public void booleanReturnByPost() {
Map<String, String> paramsMap = new HashMap<String, String>(2);
paramsMap.put("fileName", "測試");
paramsMap.put("username", "張三");
String url = PropUtil.configProp.getProperty("url") + "/httpClientController.do?booleanReturnByPost";
System.out.println(HttpClientUtil.booleanReturnByPost(url , paramsMap));
}4.測試結果
true
[2018-07-14 18:03:54] [INFO] fileName: 測試, userName: null
userName為null是因為接收引數與傳送引數大小寫不完全一致
五：關於controller介面的說明會在另外關於springmvc的部落格中說明