restTemplate 上传文件

1 添加依赖：

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

 

2 注入Bean

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.http.client.ClientHttpRequestFactory;
import org.springframework.http.client.HttpComponentsClientHttpRequestFactory;
import org.springframework.web.client.RestTemplate;

@Configuration
public class RestTemplateConfig {

    @Bean
    public RestTemplate restTemplate(ClientHttpRequestFactory factory) {
        return new RestTemplate(factory);
    }

    @Bean
    public ClientHttpRequestFactory clientHttpRequestFactory() {
        HttpComponentsClientHttpRequestFactory httpRequestFactory = new HttpComponentsClientHttpRequestFactory();
        httpRequestFactory.setConnectionRequestTimeout(30000);
        httpRequestFactory.setConnectTimeout(30000);
        httpRequestFactory.setReadTimeout(30000);
        return httpRequestFactory;
    }

}

 

3 上传文件

@Autowired
private RestTemplate restTemplate;

public void upload(){
    File file = new File("xx");
    FileSystemResource resource = new FileSystemResource(file);
    MultiValueMap<String, Object> param = new LinkedMultiValueMap<>();
    param.add("file", resource);
    String result = restTemplate.postForObject("xx", param, String.class);
}