SpringBoot学习之Json数据交互的方法

{
"username": "清风一阵吹我心",
"password": "123456"
}

[
"one",
"two",
"three"
]

{
"student": [
"张三",
"李四",
"王五"
],
"teacher": [
"语文",
"数学",
"英语"
]
}

[
{
"username": "张三",
"age": 18
},
{
"username": "李四",
"age": 20
}
]

{
 "msg": "查询成功",
 "code": 200,
 "data": {
  "provinces": [
   {
    "name": "重庆",
    "cities": [
     {
      "name": "重庆市",
      "district": [
       "江北区",
       "渝北区",
       "万州区",
       "合川区"
      ]
     }
    ]
   },
   {
    "name": "北京",
    "cities": [
     {
      "name": "北京市",
      "district": [
       "海淀区",
       "昌平区",
       "朝阳区",
       "丰台区"
      ]
     }
    ]
   }
  ]
 }
}

@Controller
@RequestMapping("/user")
public class UserController {

 @RequestMapping("/login")
 @ResponseBody
 public RespEntity login(@RequestBody ReqUser reqUser) { //使用reqUser模型来接受，而不用User

  User user = new User();
  if(reqUser != null) {
   user.setName(reqUser.getName());
   user.setPassword(reqUser.getPassword());
  }

  return new RespEntity(RespCode.SUCCESS, user); //返回的响应实体具体看下节
 }
}

public class RespEntity {
 private int code;
 private String msg;
 private Object data;

 public RespEntity(RespCode respCode) {
  this.code = respCode.getCode();
  this.msg = respCode.getMsg();
 }

 public RespEntity(RespCode respCode, Object data) {
  this(respCode);
  this.data = data;
 }

 ... 
}

public enum RespCode {

 SUCCESS(0, "请求成功"),
 WARN(-1, "网络异常，请稍后重试");

 private int code;
 private String msg;

 RespCode(int code, String msg) {
  this.msg = msg;
 }

 public int getCode() {
  return code;
 }
 public String getMsg() {
  return msg;
 }
}

public class LoginController {

 @RequestMapping("/login")
 @ResponseBody
 public RespEntity login(@RequestBody @Valid ReqUser reqUser) {

 }
}
----
public class ReqUser {
 @NotBlank(message = "用户名不能为空")
 public String getName() {
  return name;
 }

 @NotBlank(message = "密码不能为空")
 public String getPassword() {
  return password;
 }
 ...
}

@NotBlank(message = "用户名不能为空")
@Pattern(
  regexp = "1(([38]\\d)|(5[^4&&\\d])|(4[579])|(7[0135678]))\\d{8}",
  message = "手机号格式不合法"
)
public String getUsername() {
 return username;
}

@Constraint(validatedBy = PhoneValidator.class)
@Target({ElementType.METHOD, ElementType.FIELD})
@Retention(RetentionPolicy.RUNTIME)
@Documented
public @interface Phone {

 String message() default "手机号格式不合法";

 Class<?>[] groups() default {};

 Class<? extends Payload>[] payload() default {};

}

public class PhoneValidator implements ConstraintValidator<Phone, String> {

 private Pattern pattern = Pattern.compile("1(([38]\\d)|(5[^4&&\\d])|(4[579])|(7[0135678]))\\d{8}");

 @Override
 public void initialize(Phone phone) {
 }

 @Override
 public boolean isValid(String value, ConstraintValidatorContext constraintValidatorContext) {
  return pattern.matcher(value).matches();
 }
}

@Phone
public String getUsername() {
 return username;
}