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  • HttpPost发送文件类型数据

    1、引入jar包

            <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpmime</artifactId>
                <version>4.3.1</version>
            </dependency>
    
            <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
                <version>4.5.8</version>
            </dependency>    

    2、客户端

    public void upload(String localFile){
            CloseableHttpClient httpClient = null;
            CloseableHttpResponse response = null;
            try {
                httpClient = HttpClients.createDefault();
    
                // 把一个普通参数和文件上传给下面这个地址 是一个servlet
                HttpPost httpPost = new HttpPost("http://127.0.0.1:8080/processUpload");
    
                // 把文件转换成流对象FileBody
                FileBody bin = new FileBody(new File(localFile));
    
                StringBody userName = new StringBody("Scott", ContentType.create(
                        "text/plain", Consts.UTF_8));
                StringBody password = new StringBody("123456", ContentType.create(
                        "text/plain", Consts.UTF_8));
    
                HttpEntity reqEntity = MultipartEntityBuilder.create()
                        // 相当于<input type="file" name="file"/>
                        .addPart("file", bin)
                        // 相当于<input type="text" name="userName" value=userName>
                        .addPart("userName", userName)
                        .addPart("pass", password)
                        .addPart("memberId",password)
                        .build();
    
                httpPost.setEntity(reqEntity);
    
                // 发起请求 并返回请求的响应
                response = httpClient.execute(httpPost);
    
                System.out.println("The response value of token:" + response.getFirstHeader("token"));
    
                // 获取响应对象
                HttpEntity resEntity = response.getEntity();
                if (resEntity != null) {
                    // 打印响应长度
                    System.out.println("Response content length: " + resEntity.getContentLength());
                    // 打印响应内容
                    System.out.println(EntityUtils.toString(resEntity, Charset.forName("UTF-8")));
                }
                // 销毁
                EntityUtils.consume(resEntity);
            }catch (Exception e){
                e.printStackTrace();
            }finally {
                try {
                    if(response != null){
                        response.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
    
                try {
                    if(httpClient != null){
                        httpClient.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }

    3、服务端

      @RequestMapping("/processUpload")
        public void processUpload(HttpServletRequest request, HttpServletResponse response, SendRequestVo sendRequestVo, @RequestParam("file") MultipartFile file) {
            try {
                request.setCharacterEncoding("utf-8");
                response.setCharacterEncoding("utf-8");
                String name1 = file.getName();
                byte[] bytes = file.getBytes();
                FileUtils.writeByteArrayToFile(new File("C:\Users\wangdongjiang\Desktop\wdj\" + name1), bytes);
                response.addHeader("token", "hello");
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    Life is so short,do something to make yourself happy, such as coding.
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  • 原文地址:https://www.cnblogs.com/dongjiang/p/11413806.html
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