HttpClient POST请求

@Test
public void testPost(){
    //conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded"); 接收参数不应该加@ResponseBody
    //conn.setRequestProperty("Content-Type", "application/json"); 接收参数必须加@ResponseBody
    String url = "http://192.168.40.156:8081/member/change/password/test";
    String body = "oldPassword=111111qqq&passwordEnsure=111111qq&password=111111qq";
    String result = HttpUtils.post(url,body);
    System.out.println("result:" + System.lineSeparator() + result);
    Result result1 = JSONObject.parseObject(result,Result.class);
    System.out.println("code:"+result1.getStatus().getCode());
    System.out.println("statusMsg:"+result1.getStatus().getStatusMsg());
    System.out.println("data:"+result1.getData());
}
控制面板输出：

url:
http://192.168.40.156:8081/member/change/password/test
body:
oldPassword=111111qqq&passwordEnsure=111111qq&password=111111qq
result:
{"status":{"code":500,"statusMsg":"旧登录密码必须与原设定密码一致。"},"data":null}
code:500
statusMsg:旧登录密码必须与原设定密码一致。
data:null

请求地址：

@PostMapping("change/password/test")

//@RequestBody MemberChangePasswordDTO memberChangePasswordDTO 不行

public Result changePasswordTest(MemberChangePasswordDTO memberChangePasswordDTO) {

    String mobilePhone = "18211672518";
    String oldPassword = memberChangePasswordDTO.getOldPassword();
    String password = memberChangePasswordDTO.getPassword();
    String passwordEnsure = memberChangePasswordDTO.getPasswordEnsure();
    //密码校验
    //旧密码验证
    boolean isValidOldPassword = memberService.verifyPassword(oldPassword,mobilePhone);
    if(!isValidOldPassword){
        return Result.error("旧登录密码必须与原设定密码一致。");
    }
    //新密码验证
    if (!Pattern.matches(Constant.REGEX_PASSWORD, password)) {
        return Result.error("密码的长度为8-16位，由大小写字母、数字、符号至少两种组成。");
    }
    if (!password.equals(passwordEnsure)) {
        return Result.error("'确认新密码'与'新的登录密码'所输入的密码必须一致。");
    }
    if(Objects.equals(oldPassword,password)){
        return Result.error("新旧密码相同，无需修改。");
    }
    int count = memberService.updatePasswordByPhone(mobilePhone, password);

    if (count > 0) {
        return Result.ok("密码变更成功");
    }
    return Result.error("密码变更失败");

}

/**
 * post请求
 *
 * @param url  功能和操作
 * @param body 要post的数据
 */
public static String post(String url, String body) {
    System.out.println("url:" + System.lineSeparator() + url);
    System.out.println("body:" + System.lineSeparator() + body);

    String result = "";
    try {
        BufferedReader in = null;
        URL realUrl = new URL(url);
        URLConnection conn = realUrl.openConnection();

        // 设置连接参数
        conn.setDoOutput(true);
        conn.setDoInput(true);
        conn.setConnectTimeout(5000);
        conn.setReadTimeout(20000);
        conn.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
        // 提交数据
        OutputStream out = conn.getOutputStream();
        out.write(body.getBytes());
        out.flush();
        out.close();
        // 读取返回数据
        in = new BufferedReader(new InputStreamReader(conn.getInputStream(), "UTF-8"));
        String line = "";
        boolean firstLine = true; // 读第一行不加换行符
        while ((line = in.readLine()) != null) {
            if (firstLine) {
                firstLine = false;
            } else {
                result += System.lineSeparator();
            }
            result += line;
        }
    } catch (Exception e) {
        e.printStackTrace();
    }
    return result;
}

附录1：返回数据的数据结构

public class Result<T> {
    private Status status;

    private T data;

    public Result() {
    }

public static Result ok() {
    return new Result(Status.ok());
}

public static <T> Result<T> ok(T data) {
    return new Result(Status.ok(), data);
}

public static <T> Result<T> error(String errorMsg) {
    return new Result(Status.error(errorMsg));
}
｝

public class Status implements StatusConstant {
    private int code;
    private String statusMsg;

public static Status ok() {
    return new Status(SUCCESS, STATUS_OK);
}

public static Status error() {
        return new Status(INTERNAL_ERR, STATUS_INTERNAL_ERR);
    }

    public static Status error(String msg) {
        return new Status(INTERNAL_ERR, msg);
    }
}

public interface StatusConstant extends ResultCode {
    String STATUS_OK = "OK";
    String STATUS_NOT_FOUND = "Not Found";
    String STATUS_PARAMS_INVALID = "Params Invalid";
    String STATUS_INTERNAL_ERR = "Server Internal Error";
}

public interface ResultCode {
    int SUCCESS = 200;
    int BAD_REQUEST = 400;
    int UNAUTHORIZED = 401;
    int FORBIDDEN = 403;
    int NOT_FOUND = 404;
    int METHOD_ALLOWED = 405;
    int PARAMS_INVALID = 412;
    int INTERNAL_ERR = 500;
}

附录2：入参的数据结构

/**
 * @ClassName: MemberChangePasswordDTO
 * @Description: 密码变更
 * @author: yaozhenhua
 * @date: 2019/3/26 15:26
 */
@Data
public class MemberChangePasswordDTO {
    private String oldPassword;
    private String password;
    private String passwordEnsure;
}

来源：oschina

链接：https://my.oschina.net/u/4255039/blog/3590588