/*** 多附件上传* @param host* @param uri* @param attachment 附件* @param param  body参数* @return*/public String upload(String host, String uri, Map<String,String> attachment, Map<String, String> param) {logger.info("*****************request*****************");CloseableHttpClient httpClient = null;CloseableHttpResponse response = null;MultipartEntityBuilder builder = MultipartEntityBuilder.create();;File file = null;InputStream inputStream = null;String url = host + uri;String rst = "";try {httpClient = HttpClients.createDefault();logger.info("请求路径： "+ url);HttpPost httpPost = new HttpPost(url);for(String fileName:attachment.keySet()){inputStream = this.getClass().getClassLoader().getResourceAsStream(attachment.get(fileName));  //获取resources下的资源文件file = new File(attachment.get(fileName));builder.addBinaryBody(fileName, inputStream, create("multipart/form-data", Consts.UTF_8), file.getName());}for (Map.Entry<String, String> entry : param.entrySet()) {String key = entry.getKey();String value = entry.getValue();StringBody stringBody = new StringBody(value, create("text/plain", Consts.UTF_8));builder.addPart(key, stringBody);logger.info("请求参数："+key+":"+ value);}HttpEntity reqEntity = builder.build();httpPost.setEntity(reqEntity);// 发起请求 并返回请求的响应response = httpClient.execute(httpPost);// 获取响应对象HttpEntity resEntity = response.getEntity();if (resEntity != null) {// 打印响应内容rst = EntityUtils.toString(resEntity, Charset.forName("UTF-8")) ;logger.info("*****************response*****************");logger.info("响应结果： " +rst);}// 销毁EntityUtils.consume(resEntity);return rst;} catch (Exception e) {logger.info("出错啦： "+e.getMessage());e.printStackTrace();return "出错了";} finally {try {if (response != null) {response.close();}} catch (IOException e) {e.printStackTrace();}try {if (httpClient != null) {httpClient.close();}} catch (IOException e) {e.printStackTrace();}}}

public String uploadImage () throws Exception {Map<String, String> params = new HashMap<>();params.put("uploadType", "1");params.put("repayReason", "测试数据");Map<String, String> attachment= new HashMap<>();attachment.put("imageFile","picture/repayPic.jpg");  //该附件放在resources包下的picture包里面attachment.put("images","picture/repay.jpg");String rst = baseRequest.upload("http://xxxx.com","/web/upload", attachment, params);return rst;
}

1.设置上传的模式；
　　setMode(HttpMultipartMode mode)，其中mode主要有BROWSER_COMPATIBLE，RFC6532，STRICT三种，默认值是STRICT。
2.创建MultipartEntityBuilder对象，并添加需要上传的数据；
　a.利用MultipartEntityBuilder.create()来创建对象；
　b.addBinaryBody：以二进制的形式添加数据，可以添加File、InputStream、byte[]类型的数据。
　　addBinaryBody(String name, File file, ContentType contentType, String filename)
　　addBinaryBody(String name, InputStream stream, ContentType contentType, String filename)
　　addBinaryBody(String name, byte[] b, ContentType contentType, String filename)
　c.addTextBody：添加文本数据
　　addTextBody(String name, String text, ContentType contentType)
　d.addPart：以Key/Value的形式添加ContentBody类型的数据
　　addPart(String name, ContentBody contentBody)

MultipartEntityBuilder用法

2.MultipartEntityBuilder这个类主要用于创建HttpEntity。它的主要方法有：