java 後臺模擬文件上傳請求

jar包依賴

<dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpcore</artifactId>
            <version>4.3.3</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpmime</artifactId>
            <version>4.3.4</version>
        </dependency>

//模擬from文件上傳請求代碼

public static String upload(String url,String filePath){
        String response = null;
        url = "http://127.0.0.1:8080/test/upload";
        filePath="D:\\test\\123.xls";
        try {
            CloseableHttpClient httpclient = null;
            CloseableHttpResponse httpresponse = null;
            try {
                httpclient = HttpClients.createDefault();
                HttpPost httppost = new HttpPost(url);

                //設置超時時間 
                int timeOut = 30000;
                RequestConfig requestConfig = RequestConfig.custom().setConnectionRequestTimeout(timeOut)
                        .setConnectTimeout(timeOut).setSocketTimeout(timeOut).build();
                httppost.setConfig(requestConfig);
                //文件轉Multipart
                File file = new File(filePath);
                MultipartEntityBuilder multipartEntityBuilder = MultipartEntityBuilder.create();
                multipartEntityBuilder.setMode(HttpMultipartMode.RFC6532);
                multipartEntityBuilder.addBinaryBody("file", file, ContentType.DEFAULT_BINARY, file.getName());
                httppost.setEntity(multipartEntityBuilder.build());
                //執行
                httpresponse = httpclient.execute(httppost);
                response = EntityUtils
                        .toString(httpresponse.getEntity());

            } finally {
                if (httpclient != null) {
                    httpclient.close();
                }
                if (httpresponse != null) {
                    httpresponse.close();
                }
            }
        } catch (Exception e) {
            e.printStackTrace();
        }
        return response;
    }