httpclient通过post multipart/form-data 上传文件
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httpclient通过post multipart/form-data 上传文件
public static String httpClientUploadFile(String url, File file)
CloseableHttpClient httpClient = HttpClients.createDefault();
String result = "";
//每个post参数之间的分隔。随意设定,只要不会和其他的字符串重复即可。
String boundary ="--------------4585696313564699";
try
//文件名
String fileName = file.getName();
HttpPost httpPost = new HttpPost(url);
//设置请求头
httpPost.setHeader("Content-Type","multipart/form-data; boundary="+boundary);
//HttpEntity builder
MultipartEntityBuilder builder = MultipartEntityBuilder.create();
//字符编码
builder.setCharset(Charset.forName("UTF-8"));
//模拟浏览器
builder.setMode(HttpMultipartMode.BROWSER_COMPATIBLE);
//boundary
builder.setBoundary(boundary);
//multipart/form-data
builder.addPart("multipartFile",new FileBody(file));
// binary
// builder.addBinaryBody("name=\"multipartFile\"; filename=\"test.docx\"", new FileInputStream(file), ContentType.MULTIPART_FORM_DATA, fileName);// 文件流
//其他参数
builder.addTextBody("filename", fileName, ContentType.create("text/plain", Consts.UTF_8));
//HttpEntity
HttpEntity entity = builder.build();
httpPost.setEntity(entity);
// 执行提交
HttpResponse response = httpClient.execute(httpPost);
//响应
HttpEntity responseEntity = response.getEntity();
if (responseEntity != null)
// 将响应内容转换为字符串
result = EntityUtils.toString(responseEntity, Charset.forName("UTF-8"));
catch (IOException e)
e.printStackTrace();
catch (Exception e)
e.printStackTrace();
finally
try
httpClient.close();
catch (IOException e)
e.printStackTrace();
System.err.println("result"+result);
return result;
//main 方法
public static void main(String[] args)
httpClientUploadFile("http://127.0.0.1:8080/upload",new File("d:/test/test.docx"));
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