springboot学习总结RestTemplate用法

Posted 2021-02-02 vincentren

（一）配置类

package com.vincent.demo.config;

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

@Configuration
public class RestTemplateConfig {

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

    @Bean
    public ClientHttpRequestFactory simpleClientHttpRequestFactory() {
        SimpleClientHttpRequestFactory factory = new SimpleClientHttpRequestFactory();
        factory.setReadTimeout(5000);
        factory.setConnectTimeout(15000);
        return factory;
    }
}

（二）rest接口的controller

package com.vincent.demo.controller;

import com.alibaba.fastjson.JSONObject;
import com.vincent.demo.vo.TestVO;
import org.springframework.web.bind.annotation.DeleteMapping;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

/**
 * @author rw
 * @date 2019/1/9 下午1:03
 */
@RestController
public class RestTestController {

    @GetMapping("/getTest")
    public String getTest() {
        return "getTest";
    }

    @GetMapping("/getObjectTest")
    public TestVO getObjectTest() {
        TestVO testVO = new TestVO();
        testVO.setId(1L);
        testVO.setName("test");
        return testVO;
    }

    @DeleteMapping("/deleteEntityTest")
    public JSONObject deleteEntityTest(@RequestParam Long id) {
        JSONObject jsonObject = new JSONObject();
        jsonObject.put("id", id);
        return jsonObject;
    }
}

（三）测试

    @Autowired
    RestTemplate restTemplate;

    @Test
    public void getTest() throws URISyntaxException {
        String msg = restTemplate.getForObject("http://localhost:8080/getTest", String.class);
        System.out.println(msg);
        ResponseEntity<String> entity = restTemplate.getForEntity("http://localhost:8080/getTest", String.class);
        System.out.println("body:" + entity.getBody()
                + ",StatusCode:" + entity.getStatusCode()
                + ",StatusCodeValue:" + entity.getStatusCodeValue()
                + ",:Headers" + entity.getHeaders());
        //使用RequestEntity的一个弊端是new URI()要处理URISyntaxException
        RequestEntity requestEntity = RequestEntity.get(new URI("http://localhost:8080/getTest")).build();
        restTemplate.exchange(requestEntity, String.class);
        ResponseEntity<String> entity1 = restTemplate.exchange("http://localhost:8080/getTest", HttpMethod.GET, null, String.class);
        ResponseEntity<TestVO> entity2 = restTemplate.exchange("http://localhost:8080/getObjectTest", HttpMethod.GET, null, TestVO.class);
        System.out.println("body:" + entity2.getBody()
                + ",StatusCode:" + entity2.getStatusCode()
                + ",StatusCodeValue:" + entity2.getStatusCodeValue()
                + ",:Headers" + entity2.getHeaders());
    }

（四）总结