java post发送文件

添加依赖

        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.5.3</version>
        </dependency>

import org.json.JSONObject;


HttpClient client = new DefaultHttpClient();
                HttpPost httpPost = new HttpPost(uploadUrl);
                StringBody bucketName = new StringBody("xxxx", ContentType.create("text/plain", Consts.UTF_8));
                HttpEntity reqEntity = MultipartEntityBuilder.create()
                        // 相当于<input type="file" name="file"/>
                        .addPart("file", new FileBody(file))
                        // 相当于<input type="text" name="bucketName" value=bucketName>
                        .addPart("bucketName", bucketName)
                        .build();
                httpPost.setEntity(reqEntity);

                HttpResponse response = client.execute(httpPost);
                HttpEntity responseEntity = response.getEntity();
                result = EntityUtils.toString(responseEntity);

        JSONObject jsonObject = new JSONObject(result);
        String code = jsonObject.get("code").toString();