一、HttpPost上傳文件

public static String getSuffix(final MultipartFile file){

if(file == null || file.getSize() == 0){

return null;

}

String fileName = file.getOriginalFilename();

return fileName.substring(fileName.lastIndexOf(".")+1);

}

public static JSONObject uploadFile(String urlStr, MultipartFile file, String token) throws IOException {

// 后綴

String suffix = getSuffix(file);

CloseableHttpClient httpClient = HttpClients.createDefault();

HttpPost uploadFile = new HttpPost(urlStr);

uploadFile.setHeader("authorization","Bearer " + token);

DecimalFormat df = new DecimalFormat("#.##");

MultipartEntityBuilder builder = MultipartEntityBuilder.create();

// HTTP.PLAIN_TEXT_TYPE,HTTP.UTF_8

builder.addTextBody("name", file.getOriginalFilename(), ContentType.create("text/plain", Consts.UTF_8));

builder.addTextBody("size", df.format((double) file.getSize() / 1024), ContentType.TEXT_PLAIN);

builder.addTextBody("suffix", suffix, ContentType.TEXT_PLAIN);

// 把文件加到HTTP的post請求中

// String filepath = "/user/test/123.png"

// File f = new File(filepath);

builder.addBinaryBody(

"file",

file.getInputStream(),

// new FileInputStream(f),

ContentType.APPLICATION_OCTET_STREAM,

file.getOriginalFilename()

);

HttpEntity multipart = builder.build();

uploadFile.setEntity(multipart);

CloseableHttpResponse response = httpClient.execute(uploadFile);

HttpEntity responseEntity = response.getEntity();

String sResponse= EntityUtils.toString(responseEntity, "UTF-8");

JSONObject jsonObject = JSONObject.parseObject(sResponse);

// {"code":1,"data":"7efb19980373dd90f5077576afa7481a","message":""}

// {"code":401,"httpStatus":null,"data":"373656a2-baff-423a-93fb-704f51003509","message":"error"}

return jsonObject;

}復制代碼

二、HttpGet對API進行Get請求

兩張方式：

1、在URL中拼接

CloseableHttpClient httpClient = HttpClients.createDefault();

String urlStr ="http://abc.com/oss/getUrl?id=" + ossFileId;

HttpGet httpGet = new HttpGet(urlStr);

// 使用Oauth2進行權限驗證

httpGet.setHeader("authorization","Bearer 34195fa8-00a6-4288-bda9-7d37541c3a39");

CloseableHttpResponse response = httpClient.execute(httpGet);

HttpEntity responseEntity = response.getEntity();

String sResponse= EntityUtils.toString(responseEntity, "UTF-8");

System.out.println(sResponse);

JSONObject jsonObject = JSONObject.parseObject(sResponse);

System.out.println(jsonObject);復制代碼

2、使用參數的方式

CloseableHttpClient httpClient = HttpClients.createDefault();

/*

* 由于GET請求的參數都是拼裝在URL地址后方，所以我們要構建一個URL，帶參數

*/

URIBuilder uriBuilder = new URIBuilder("http://www.baidu.com");

/** 第一種添加參數的形式 */

/*uriBuilder.addParameter("name", "root");

uriBuilder.addParameter("password", "123456");*/

/** 第二種添加參數的形式 */

List list = new LinkedList<>();

BasicNameValuePair param1 = new BasicNameValuePair("name", "root");

BasicNameValuePair param2 = new BasicNameValuePair("password", "123456");

list.add(param1);

list.add(param2);

uriBuilder.setParameters(list);

// 根據帶參數的URI對象構建GET請求對象

HttpGet httpGet = new HttpGet(uriBuilder.build());

// 使用Oauth2進行權限驗證

httpGet.setHeader("authorization","Bearer 34195fa8-00a6-4288-bda9-7d37541c3a39");

CloseableHttpResponse response = httpClient.execute(httpGet);

HttpEntity responseEntity = response.getEntity();

String sResponse= EntityUtils.toString(responseEntity, "UTF-8");

System.out.println(sResponse);

JSONObject jsonObject = JSONObject.parseObject(sResponse);

System.out.println(jsonObject);復制代碼

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