依赖

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-validation</artifactId>
        </dependency>

校验类TestSayHelloForm

package com.example.emos.wx.controller.form;

import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import javax.validation.constraints.NotBlank;
import javax.validation.constraints.Pattern;

@ApiModel
@Data
public class TestSayHelloForm {
    @NotBlank
    //必须是简体汉字(2~15)个
    @Pattern(regexp = "^[\\u4e00-\\u9fa5]{2,15}$",message = "不符合正则表达式")
    @ApiModelProperty("姓名")
    private String name;
}

Controller中使用校验类TestSayHelloForm

package soulboy.emos.wx.controller;

import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import org.springframework.web.bind.annotation.*;
import soulboy.emos.wx.common.util.R;
import soulboy.emos.wx.controller.form.TestSayHelloForm;

import javax.validation.Valid;

@RestController
@RequestMapping("/test")
@Api("测试Web接口")
public class TestController {

    @PostMapping("/sayHello")
    @ApiOperation("最简单的测试方法")
    public R sayHello(@Valid @RequestBody TestSayHelloForm form){
        return R.ok().put("message", "Hello," + form.getName());
    }

}