spring boot快速入门 6: 表单验证

廖师兄源码： https://gitee.com/liaoshixiong/girl

样例：拦截所有未满18岁的女生

第一步：在girl实体类中：添加注解 @Min(value=18 ,message = "未成年少女禁止入内！")

package com.payease.domain;

import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.validation.constraints.Min;

/**
 * Created by liuxiaoming on 2017/11/6.
 */
@Entity
public class Girl {

    @Id
    @GeneratedValue
    private int id;

    private String cupSize;

    @Min(value=18 ,message = "未成年少女禁止入内！")
    private int age;

    public int getId() {
        return id;
    }

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

    public String getCupSize() {
        return cupSize;
    }

    public void setCupSize(String cupSize) {
        this.cupSize = cupSize;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

}

第二步：GirlResposity

package com.payease.respository;

import com.payease.domain.Girl;
import org.springframework.data.jpa.repository.JpaRepository;

import java.util.List;

/**
 * Created by liuxiaoming on 2017/11/6.
 */
public interface GirlRespository extends JpaRepository<Girl,Integer>{
}

第三步：在controller 中 添加注解：@Valid

 @Autowired
    private GirlRespository girlRespository;    

   /**
     * 创建一个女生
     */
    @PostMapping("/girls")
    public Girl girlAdd(@Valid Girl girl, BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            System.out.println(bindingResult.getFieldError().getDefaultMessage());
            return null;
        }
        girl.setCupSize(girl.getCupSize());
        girl.setAge(girl.getAge());
        return girlRespository.save(girl);
    }

第四步：postman提交