RestTemplate get 方式，getForObject 请求时带有参数的6种情况

https://www.bilibili.com/video/BV1AN411Z7mx?p=9

Application Service 中的 DemoController.java

import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class DemoController {

    @RequestMapping("/demo")
    public String demo() {
        return "demo";
    }


    @RequestMapping("/demo2")
    public String demo2(String name, Integer age) {
        return "name:" + name + ",age:" + age;
    }


    @RequestMapping("/demo3/{name}/{age}")
    public String demo3(@PathVariable String name, @PathVariable Integer age) {
        return "name:" + name + ",age:" + age;
    }

}

Application Client 中的 ClientApplicationTests.java

import org.junit.jupiter.api.Test;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.web.client.RestTemplate;

@SpringBootTest
public class ClientApplicationTests {

    @Test
    void contextLoads() {
        RestTemplate restTemplate = new RestTemplate();
        // 第二个参数也控制该方法返回值类型。因为该方法返回值为响应体数据。
        String result = restTemplate.getForObject("http://localhost:8080/demo", String.class);
        System.out.println(result);
    }

    @Test
    void withParam() {
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject("http://localhost:8080/demo2?name=jihch&age=15", String.class);
        System.out.println(result);
    }

    @Test
    void withParam2() {
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject("http://localhost:8080/demo2?name={1}&age={2}", String.class, "jihch", 15);
        System.out.println(result);
    }

    @Test
    void withParam3() {
        Map<String, Object> map = new HashMap<>();
        map.put("name", "jihch");
        map.put("age", 15);
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject("http://localhost:8080/demo2?name={name}&age={age}", String.class, map);
        System.out.println(result);
    }

    @Test
    void withParam4() {
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject("http://localhost:8080/demo3/jihch/15", String.class);
        System.out.println(result);
    }

    @Test
    void withParam5() {
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject("http://localhost:8080/demo3/{1}/{2}", String.class, "jihch", 15);
        System.out.println(result);
    }

    @Test
    void withParam6() {
        Map<String, Object> map = new HashMap<>();
        map.put("name", "jihch");
        map.put("age", 15);
        RestTemplate restTemplate = new RestTemplate();
        String result = restTemplate.getForObject("http://localhost:8080/demo3/{name}/{age}", String.class, map);
        System.out.println(result);
    }

}

name:jihch,age:15