POST上传文件接口携带JSON参数，并且调用

项目开发中，与其他业务服务发送配置，需要传递JSON和图片，有所得，遂记此随笔！！！

文件上传接口

import cn.hutool.core.util.RandomUtil;
import com.coalbot.isapidemo.entity.OCRParam;
import com.coalbot.isapidemo.entity.OCRParamEx;
import org.springframework.core.io.FileSystemResource;
import org.springframework.http.*;
import org.springframework.util.LinkedMultiValueMap;
import org.springframework.util.MultiValueMap;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.client.RestTemplate;
import org.springframework.web.multipart.MultipartFile;

import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;

/**
 * @ClassName：TestController
 * @Author: XinHai.Ma
 * @Date: 2025/3/12 15:15
 * @Description: 接口调用测试
 */
@RequestMapping("/channel")
@RestController
public class TestController {

    /**
     * 文件上传+简单JSON参数
     *
     * @param param
     * @return
     */
    @PostMapping("/upload")
    public Map<String, Object> upload(OCRParam param) {
        Map<String, Object> result = new LinkedHashMap<>();
        result.put("getAlgorithm_key", param.getAlgorithm_key());
        result.put("getAlgorithm_name", param.getAlgorithm_name());
        result.put("images", param.getImages().stream().map(MultipartFile::getOriginalFilename).collect(Collectors.toList()));
        result.put("meter_type", param.getAlgorithm_key());
        return result;
    }

    /**
     * 文件上传+复杂JSON参数
     *
     * @param images
     * @param param
     * @return
     */
    @PostMapping("/uploadEx")
    public Map<String, Object> uploadEx(@RequestPart("images") List<MultipartFile> images,
                                        @RequestPart("param") OCRParamEx param) {
        Map<String, Object> result = new LinkedHashMap<>();
        result.put("getAlgorithm_key", param.getAlgorithm_key());
        result.put("getAlgorithm_name", param.getAlgorithm_name());
        result.put("images", images.stream().map(MultipartFile::getOriginalFilename).collect(Collectors.toList()));
        result.put("meter_type", param.getAlgorithm_key());
        result.put("pointer", param.getPointer());
        result.put("digit", param.getDigit());
        return result;
    }
}

OCRParam

@Data
public class OCRParam {

    private String algorithm_key;
    private String algorithm_name;
    private List<MultipartFile> images;
    private String meter_type;

}

OCRParamEx

@Data
public class OCRParamEx {

    private String algorithm_key;
    private String algorithm_name;
    private String meter_type;
    private PointerParam pointer;
    private DigitParam digit;

}

PointerParam

@Data
public class PointerParam {

    private String name;
    private Integer type;
    private String min_value;
    private String max_value;
    private Integer value_num;

}

DigitParam

@Data
public class DigitParam {

    private Integer point_location;

}

 

ApiPost调用

文件上传+简单JSON参数接口调用

 

文件上传+复杂JSON参数接口调用

ApiPost传递参数我会设置，用RestTemplate怎么调用呢？我还是第一次调用参数这么复杂的接口？

 

调用接口

    /**
     * RestTemplate调用接口，文件上传+复杂JSON参数
     *
     * @return
     */
    @PostMapping("/callUploadEx")
    public String callUploadEx() {
        String jsonStr = "{ " +
                "\"algorithm_key\" : \"algorithm_key\", " +
                "\"algorithm_name\" : \"algorithm_name\", " +
                "\"meter_type\" : \"" + RandomUtil.randomInt(1, 101) + "\", " +
                "\"pointer\" : {" +
                "   \"name\":\"仪表名称\", " +
                "   \"type\":" + RandomUtil.randomInt(1, 101) + ", " +
                "   \"min_value\":\"" + RandomUtil.randomInt(1, 101) + "\", " +
                "   \"max_value\":\"" + RandomUtil.randomInt(1, 101) + "\"," +
                "   \"value_num\":" + RandomUtil.randomInt(1, 101) +
                "  }, " +
                "\"digit\" : {" +
                "   \"point_location\":" + RandomUtil.randomInt(1, 101) +
                "  } " +
                "}";

        // 设置请求头
        HttpHeaders headers = new HttpHeaders();
        headers.setContentType(MediaType.MULTIPART_FORM_DATA);
        // 设置参数
        MultiValueMap<String, Object> body = new LinkedMultiValueMap<>();
        FileSystemResource file = new FileSystemResource("C:\\Users\\maxin\\Pictures\\heiandijia.webp");
        FileSystemResource file1 = new FileSystemResource("C:\\Users\\maxin\\Pictures\\1.webp");
        body.add("images", file);
        body.add("images", file1);
        // 设置JSON请求头
        HttpHeaders jsonHeaders = new HttpHeaders();
        jsonHeaders.setContentType(MediaType.APPLICATION_JSON);
        // 设置JSON参数
        body.add("param", new HttpEntity<>(jsonStr, jsonHeaders));
        HttpEntity<MultiValueMap<String, Object>> requestEntity = new HttpEntity<>(body, headers);
        ResponseEntity<String> response = new RestTemplate().exchange("http://localhost:8082/channel/uploadEx",
                HttpMethod.POST,
                requestEntity,
                String.class);
        return response.getBody();
    }

需要嵌套请求头，并且对文件参数请求头和JSON参数请求头分别设置ContentType，学到了