Difference between them

Group example

public interface First{}

public interface Second{}

public class User {
	// All verified
	@NotNull(message = "...")
	private int id;

 	// First to verify
	@NotNull(message = "...", groups = { First.class })
	private String username;
 
 	// First or Second to verify
	@NotNull(message = "...", groups = { First.class, Second.class })
	private String content;
	
	// First verify NotEmpty, Second verify Size
	@NotEmpty(message = "...", groups = { First.class })
	@Size(message = "...", min = 3, max = 8, groups = { Second.class })
	private String height;
}

// Verify only Second grouping and ungrouped properties
public String save(@Validated( { Second.class }) User user, BindingResult result) {
	if (result.hasErrors()) {
		return "validate/error";
	}
	return "redirect:/success";
}

Packet sequence

public interface GroupA {}
 
public interface GroupB {}
 
@GroupSequence( { GroupA.class, GroupB.class })
public interface Group {}

public @ResponseBody String save(@Validated({ Group.class }) User user, BindingResult result) {
	if(result.hasErrors()) {
		return false;
	}
	return true;
}

Nested validation

public class Item {
    @NotNull(message = "id Can not be empty")
    @Min(value = 1, message = "id Must be a positive integer")
    private Long id;

	@Valid
    @NotNull(message = "props Can not be empty")
    @Size(min = 1, message = "At least one attribute is required")
    private List<Prop> props;
}

public class Prop {
    @NotNull(message = "pid Can not be empty")
    @Min(value = 1, message = "pid Must be a positive integer")
    private Long pid;

    @NotNull(message = "vid Can not be empty")
    @Min(value = 1, message = "vid Must be a positive integer")
    private Long vid;

    @NotBlank(message = "pidName Can not be empty")
    private String pidName;

    @NotBlank(message = "vidName Can not be empty")
    private String vidName;
}

@RestController
public class ItemController {
    @RequestMapping("/item/add")
    public void addItem(@Validated Item item, BindingResult bindingResult) {
        doSomething();
    }
}

Validate multiple objects

@Controller  
public class PeopleController {  
    @RequestMapping("/add")  
    public @ResponseBody String add(@Validated People pp, BindingResult result1, @Validated Person ps, BindingResult result2)  
    {  
        if(result1.hasErrors())  
        {  
            return false;  
        }  
        if(result2.hasErrors())  
        {  
            return false;  
        }  
        return true;  
    }  
}