控制器：

package com.awaimai.web;

import org.hibernate.validator.constraints.Range;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import org.springframework.web.servlet.ModelAndView;

import javax.validation.Valid;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import java.util.HashMap;
import java.util.Map;


@Controller
@Validated
public class kzq
{



    @RequestMapping(value = "/test6")
    @ResponseBody
    public String test6(@RequestBody Student student)
    {
        String a = student.getFirstName();
        String b = student.getLastName();
        return a+b;
    }


}

student類：

package com.awaimai.web;

import org.springframework.validation.annotation.Validated;

import javax.validation.constraints.NotNull;
import javax.validation.constraints.Size;


public class Student
{

    @Size(min = 2,max = 5)
    private String firstName;

    @NotNull
    @Size(min = 2,max = 3)
    private String lastName;

    public void setFirstName(String firstName)
    {
        this.firstName = firstName;
    }

    public String getFirstName()
    {
        return firstName;
    }

    public void setLastName(String lastName)
    {
        this.lastName = lastName;
    }

    public String getLastName()
    {
        return lastName;
    }

}

postman訪問：