HttpMessageNotReadableException: Required request body is missing:

完整错误：

Resolved [org.springframework.http.converter.HttpMessageNotReadableException: Required request body is missing: public java.lang.Object com.example.sx.study.Econtroller.test1(com.example.sx.study.Entity,org.springframework.validation.BindingResult)]

解决办法：

在@RequestBody后加上(required = false)

虽然通过此方法的确返回了信息，但是还是存在问题的。

写该类的目的是为了对于请求体（request body）传来参数进行校验，这种改法根本起不了作用。

正确改法：

打开postman，在Body中填入需要验证的数据。

这样才能达到参数检验的效果。

源码如下：

@Data
public class Entity{@NotNull(message = "姓名不能为null")private String name;@Min(value = 30,message = "年龄最小为30")private Integer age;private Integer password;private String sex;
}

@RestController
public class Econtroller {@RequestMapping("test1")public String test1(@Valid @RequestBody Entity entity, BindingResult result){if (result.hasErrors()){String defaultMessage = result.getFieldError().getDefaultMessage();return defaultMessage;}System.out.println(entity);return "注册成功";}}

希望有帮助！！！

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