【Java】【参数校验】使用spring-validation校验请求参数

添加依赖

//maven

    org.springframework.boot
    spring-boot-starter-validation
    2.1.6.RELEASE


//gradle
implementation group: 'org.springframework.boot', name: 'spring-boot-starter-validation', version: '2.1.6.RELEASE'

请求参数前加上@Valid注解

    @ResponseBody
    @PostMapping(value = "/login")
    public String login(@Valid LoginRequest req) {
    	return "";
    }

字段里设置校验类型

@Data
public class LoginRequest {

    @NotNull
    public String account;

    @NotNull
    public String password;
}

注意类所在的包，不要引用错误的同名注解

import javax.validation.Valid;
import javax.validation.constraints.NotNull;