Springboot服务端数据校验

一，实体对象做数据校验

1，pojo类

public class User {
    /*
    * @NotNull:对基本数据类型的对象类型做非空校验
    * @NotBlank:对字符串类型做非空校验
    * @NotEmpty:对集合类型做非空校验
    * */
    @NotNull
    private Integer id;
    @NotBlank
    private String password;
    @NotBlank
    private String username;

    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password == null ? null : password.trim();
    }

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username == null ? null : username.trim();
    }

    @Override
    public String toString() {
        return "User{" +
                "id=" + id +
                ", password='" + password + '\'' +
                ", username='" + username + '\'' +
                '}';
    }
}

2，controller类

@Controller
@RequestMapping("/user")
public class UserController {
    @RequestMapping("/addUser")
    public String addUser(@Validated User user, BindingResult result)
    {
        //如果错了就进去
        if(result.hasErrors())
        {
            //这里只是为了输出一下数据校验信息
            List<ObjectError> list= result.getAllErrors();
            for (ObjectError err:list) {
                FieldError fieldError=(FieldError)err;
                String field = fieldError.getField();
                String msg = fieldError.getDefaultMessage();
                System.out.println(field+"\t"+msg);
            }
            return "addUser";

        };
        System.out.println(user);
        return "ok";
    };
}