Difference between @Valid and @Validated in Spring

Question

Spring supports two different validation methods: Spring validation and JSR-303 bean validation. Both can be used by defining a Spring validator that delegates to other dele

Answer 1

A more straight forward answer. For those who still don't know what on earth is "validation group".

Usage for @Valid Validation

Controller:

@RequestMapping(value = "createAccount")
public String stepOne(@Valid Account account) {...}

Form object:

public class Account {

    @NotBlank
    private String username;

    @Email
    @NotBlank
    private String email;

}

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Usage for @Validated Validation Group
Source: http://blog.codeleak.pl/2014/08/validation-groups-in-spring-mvc.html

Controller:

@RequestMapping(value = "stepOne")
public String stepOne(@Validated(Account.ValidationStepOne.class) Account account) {...}

@RequestMapping(value = "stepTwo")
public String stepTwo(@Validated(Account.ValidationStepTwo.class) Account account) {...}

Form object:

public class Account {

    @NotBlank(groups = {ValidationStepOne.class})
    private String username;

    @Email(groups = {ValidationStepOne.class})
    @NotBlank(groups = {ValidationStepOne.class})
    private String email;

    @NotBlank(groups = {ValidationStepTwo.class})
    @StrongPassword(groups = {ValidationStepTwo.class})
    private String password;

    @NotBlank(groups = {ValidationStepTwo.class})
    private String confirmedPassword;

}