RestTemplate请求Formdata格式接口与Json格式接口调用

依赖前提

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

<!--nacos服务注册-->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-loadbalancer</artifactId>
    <version>3.0.1</version>
</dependency>

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.72</version>
</dependency>

调用restTemplate注入

@Autowired
RestTemplate restTemplate;

关键是请求头的类型和调用时的参数类型

请求Formdata格式接口

@GetMapping("/formdata")
public String testRestFormdata(){
    String url = "https://xxxxxxx.cn/xxxxx/xxxx";
    String studentCode = "2222x55x-1111-1111-0000-xxxxxxxxxxxx@123456";

    HttpHeaders headers = new HttpHeaders();
    MultiValueMap<String, Object> map = new LinkedMultiValueMap<>();
    //接口参数
    map.add("studentCode",studentCode);
    //头部类型
    headers.setContentType(MediaType.APPLICATION_FORM_URLENCODED);
    //构造实体对象
    HttpEntity<MultiValueMap<String, Object>> param = new HttpEntity<>(map, headers);
    System.out.println("testRest start");
    String msg = restTemplate.postForObject(url, param,String.class);
    System.out.println(msg);
    return "成功";
}

请求Json格式接口

@GetMapping("/json")
public String testRestJson(){
        String url = "https://xxxxxxx.cn/xxxxx/xxxx";
    ArrayList<StudentQcpj> list = new ArrayList<>();
    StudentQcpj studentQcpj = new StudentQcpj("2222x55x-1111-1111-0000-xxxxxxxxxxxx",
            "4404000","11","小明","女","123456");
    StudentQcpj studentQcpj2 = new StudentQcpj("2222x55x-2222-2222-0000-xxxxxxxxxxxx",
            "4404000","22","小红","男","123456");
    list.add(studentQcpj);
    list.add(studentQcpj2);
    HttpHeaders headers = new HttpHeaders();
    //头部类型
    headers.setContentType(MediaType.valueOf("application/json;UTF-8"));
    //构造实体对象
    HttpEntity<String> param = new HttpEntity<>(JSON.toJSONString(list), headers);
    System.out.println("testRest start");
    JSONObject msg = restTemplate.postForObject(url, param, JSONObject.class);
    System.out.println(msg);
    return "成功";
}