spring:
  datasource:
    driver-class-name: com.mysql.cj.jdbc.Driver
    url: jdbc:mysql://localhost:3306/my_blog_db?useUnicode=true&characterEncoding=utf8&autoReconnect=true&useSSL=false&serverTimezone=UTC
    username: root
    password: root
 
mybatis-plus:
  mapper-locations: classpath:mapper/*Mapper.xml
  type-aliases-package: com.example.test.pojo
 
server:
  port: 12345

public class Result<T> {
    private Integer code;
    private String msg;
    private T data;
}

public enum ResultEnum {
    ERROR(-1,"ERROR---------"),
    SUCCESS(100,"SUCCESS--------"),
    ;
    //這樣就說明我們具有ERROR和SUCCESS兩種狀態(tài)，成功時(shí)返回100，SUCCESS
 
    private Integer code;
    private String msg;
 
    ResultEnum(Integer code, String msg) {
        this.code = code;
        this.msg = msg;
    }
 
    public Integer getCode() {
        return code;
    }
 
    public String getMsg() {
        return msg;
    }
}

public class ResultUtil {
    //對應(yīng)我們在Enum中設(shè)置的兩種狀態(tài)
    public static Result success(Object object){
        Result result = new Result();
        result.setCode(ResultEnum.SUCCESS.getCode());
        result.setMsg(ResultEnum.SUCCESS.getMsg());
        result.setData(object);
        return result;
    }
 
    public static Result error(Object object){
        Result result = new Result();
        result.setCode(ResultEnum.ERROR.getCode());
        result.setMsg(ResultEnum.ERROR.getMsg());
        result.setData(object);
        return result;
    }
}

@RestController
@RequestMapping("/api")
public class TestController {
 
    @PostMapping("/postTest")
    public Result postTest(@RequestBody boolean flag) throws Exception{
        /*
        *調(diào)用時(shí)傳入一個(gè)參數(shù)flag，如果flag值不為true就返回成功數(shù)據(jù)，否則返回失敗數(shù)據(jù)
        */
        System.out.println("已進(jìn)入api接口------");
        System.out.println(flag);
        if(flag==true){
            return ResultUtil.success("返回成功數(shù)據(jù)Congraduations!");
        }
 
        return ResultUtil.error("抱歉sorry!");
    }
 
}

public class HttpClientUtil {
    public static String doPost(String pathUrl, String data){
        OutputStreamWriter out = null;
        BufferedReader br = null;
        String result = "";
        try {
            URL url = new URL(pathUrl);
            //打開和url之間的連接
            HttpURLConnection conn = (HttpURLConnection) url.openConnection();
            //請求方法為"POST"
            conn.setRequestMethod("POST");
            // 設(shè)置是否向httpUrlConnection輸出，因?yàn)檫@個(gè)是post請求，參數(shù)要放在http正文內(nèi)，因此需要設(shè)為true, 默認(rèn)情況下是false;
            conn.setDoOutput(true);
            // Post請求不能使用緩存
            conn.setUseCaches(false);
            //設(shè)置請求屬性
            conn.setRequestProperty("accept", "*/*");
            conn.setRequestProperty("connection", "Keep-Alive");  //維持長鏈接
            conn.setRequestProperty("Content-Type", "application/json;charset=utf-8");
            conn.connect();
            //調(diào)用，獲取輸出流
            out = new OutputStreamWriter(conn.getOutputStream(), "UTF-8");
            //發(fā)送請求參數(shù)
            out.write(data);
            out.flush();
            //獲取URLConnection對象對應(yīng)的輸入流
            InputStream is = conn.getInputStream();
            //構(gòu)造一個(gè)字符流緩存
            br = new BufferedReader(new InputStreamReader(is));
            String str = "";
            while ((str = br.readLine()) != null){
                result += str;
            }
            System.out.println(result);
            //關(guān)閉流
            is.close();
            //斷開連接，disconnect是在底層tcp socket鏈接空閑時(shí)才切斷，如果正在被其他線程使用就不切斷。
            conn.disconnect();
 
        } catch (Exception e) {
            e.printStackTrace();
        }
        return result;
    }
 
}

//url需要與我們在api中設(shè)置的對應(yīng)，后一個(gè)是傳參
String s = HttpClientUtil.doPost("http://localhost:12345/api/postTest","true");
System.out.println(s);