Java中 HttpClient 发送multipart/form-data带有Json文件的Post请求

以你之姓@ 2024-04-17 05:49 61阅读 0赞

**使用postman工具发送multipart/form-data带有Json文件的Post请求，文件内容其实就是json字符串，这种请求通过postman发送，他给你处理，但是你需要做接口化测试就得偶用代码来实现，不是使用他的工具，就需要你自己写代码了**  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQxMTU2OQ_size_16_color_FFFFFF_t_70]  
1、首先弄清楚你需要得格式：

*  像我这个这种格式就是可以的（关于文件类型）  
    ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQxMTU2OQ_size_16_color_FFFFFF_t_70 1]  
    这个最难最重要的就是处理上面的这个文件。
 *  **需要的两个jar包，我是使用maven工具直接导入的。根据自己情况来就可以了**

<dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpclient</artifactId>
                <version>4.5.3</version>
            </dependency>
            
            <dependency>
                <groupId>org.apache.httpcomponents</groupId>
                <artifactId>httpmime</artifactId>
                <version>4.3.6</version>
            </dependency>

**请求处理的代码：**

package com.hy.controller;
    
    import org.apache.http.HttpEntity;
    import org.apache.http.client.ClientProtocolException;
    import org.apache.http.client.methods.CloseableHttpResponse;
    import org.apache.http.client.methods.HttpPost;
    import org.apache.http.entity.ContentType;
    import org.apache.http.entity.mime.MultipartEntityBuilder;
    import org.apache.http.impl.client.CloseableHttpClient;
    import org.apache.http.impl.client.HttpClients;
    import org.apache.http.util.EntityUtils;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    
    import java.io.File;
    import java.io.FileInputStream;
    import java.io.IOException;
    
    @Controller
    public class FaceDemo02 { 
        public static void main(String[] args) throws ClientProtocolException, IOException { 
            // 文件sTestsetFile：是我存放文件所在的项目的相对对位置
            String sTestsetFile=System.getProperty("user.dir")+ File.separator+"src"+ File.separator+"main"+ File.separator+"resources"+ File.separator+"static"+ File.separator+"images"+File.separator+"ceshi.jpg";
            String sURL="http://192.168.4.10:80/api/form";
    
            CloseableHttpClient httpClient = HttpClients.createDefault();
            HttpPost uploadFile = new HttpPost(sURL);
    
            MultipartEntityBuilder builder = MultipartEntityBuilder.create();
            //builder.setCharset(Charset.forName("uft-8"));//设置请求的编码格式
            builder.addTextBody("msg_id", "1029", ContentType.TEXT_PLAIN);
            builder.addTextBody("lib_id", "1", ContentType.TEXT_PLAIN);
            builder.addTextBody("person_name", "xiaoming", ContentType.TEXT_PLAIN);
    
            // 把文件加到HTTP的post请求中
            File f = new File(sTestsetFile);
            builder.addBinaryBody(
                    "img",
                    new FileInputStream(f),
                    ContentType.APPLICATION_OCTET_STREAM,
                    f.getName()
            );
    
            HttpEntity multipart = builder.build();
            uploadFile.setEntity(multipart);
            CloseableHttpResponse response = httpClient.execute(uploadFile);
            HttpEntity responseEntity = response.getEntity();
            String sResponse= EntityUtils.toString(responseEntity, "UTF-8");
            //打印请求返回的结果
            System.out.println("Post 返回结果"+sResponse);
        }
    }

**我测试使用的是可以的 ，文件也是能传输的，可以参考一下！！！**

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQxMTU2OQ_size_16_color_FFFFFF_t_70]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/11/757c13ce55cf40b7ba3c6e5dc5ff496c.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80NDQxMTU2OQ_size_16_color_FFFFFF_t_70 1]: https://image.dandelioncloud.cn/pgy_files/images/2024/04/11/8e6e98aaa0ac4ae29d65949c7a41cec9.png