框架推荐

net/http

go的内置http工具，可以构建client和server。

@Slf4j
@Controller
@RequestMapping("/rest")
public class RestTestController {

    @GetMapping("/get")
    @ResponseBody
    public String get(@RequestBody SSHConnectParam param) throws Exception {
        log.info(JsonUtil.beanToJson(param));
        return JsonUtil.beanToJson(param);
    }

    @PostMapping("/post")
    @ResponseBody
    public String post(@RequestBody SSHConnectParam param) throws Exception {
        log.info(JsonUtil.beanToJson(param));
        return JsonUtil.beanToJson(param);
    }

}
@Data
@AllArgsConstructor
@NoArgsConstructor
public class SSHConnectParam {
    private String ip;
    private int port;
    private String username;
    private String password;
}

-- get方法：
import (
    "io"
    "io/ioutil"
    "log"
    "net/http"
    "strings"
)

// Get 用net http实现一个 可以body json格式的GET方法
func Get(c *http.Client, url string, body io.Reader) (resp *http.Response, err error) {
    req, err := http.NewRequest("GET", url, body)
    if err != nil {
       return nil, err
    }
    req.Header.Set("Content-Type", "application/json")
    return c.Do(req)
}

func main() {
    log.Println("main ...")

    // 简单的get方法
    //resp, err := http.Get("http://localhost:8081/rest/get")

    // 用自定义的GET方法
    // requestBody：strings.NewReader 传json
    resp, err := Get(http.DefaultClient, "http://localhost:8081/rest/get", strings.NewReader("{\"ip\":\"11111111\",\"password\":\"2222\",\"port\":0,\"username\":\"4444\"}"))
    if err != nil {
       log.Fatalln("get error", err.Error())
    }
    // 完事关闭response的body
    defer resp.Body.Close()
    // 打印header中数据
    log.Println("response headers:", resp.Header)
    log.Println("response status:", resp.StatusCode)

    // 读取body中的数据
    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
       log.Fatalln("read response body error", err.Error())
    }
    // 打压body,将二进制的body转换为string
    log.Println(string(body))

    log.Println("success ...")
}

-- POST方法：
import (
    "io/ioutil"
    "log"
    "net/http"
    "strings"
)

func main() {
    log.Println("main ...")

    resp, err := http.Post("http://localhost:8081/rest/post", "application/json", strings.NewReader("{\"ip\":\"11111111\",\"password\":\"2222\",\"port\":0,\"username\":\"4444\"}"))
    if err != nil {
       log.Fatalln("post error", err.Error())
    }

    log.Println("response headers:", resp.Header)
    log.Println("response status code:", resp.StatusCode)

    body, err := ioutil.ReadAll(resp.Body)
    if err != nil {
       log.Fatalln("parse body error", err.Error())
    }
    log.Println("response body:", string(body))

    log.Println("success ...")
}