第①步：引入依赖

             
                 
      
       org.hibernate
                  
      
       hibernate-validator
                  
      
       4.3.1.Final
              
             
             
                 
      
       javax.validation
                  
      
       validation-api
                  
      
       1.0.0.GA
              
     

　　

第②步：配置Spring.xml

　　

第③步：实体类注解

 

package cn.happy.day15Validator;import org.hibernate.validator.constraints.NotEmpty;import javax.validation.constraints.Max;import javax.validation.constraints.Min;import javax.validation.constraints.Pattern;import javax.validation.constraints.Size;/** * Created by Administrator on 2018/3/31. */public class UserInfo {    /**     * Min:设置最小值     * Max:设置最大值     * Message:打印信息     */    //指定年龄在18-120之间    @Min(value = 18,message = "年龄不能小于18岁")    @Max(value = 120,message = "年龄不能大于100岁")    private Integer age;    /**     * 三种验证方式     * @NotEmpty  用于集合     * @NotNull   用于基本类型     * @NotBlank  用于引用类型     * @Size    设置大小     */    //非空验证    @NotEmpty(message = "用户名不能为空")    @Size(max = 20,min = 6,message = "用户名不能大于20个字符或小于6个字符")    private String name;    /**     * @Pattern  rehexp匹配正则     */    @NotEmpty(message = "邮箱不能为空")    @Pattern(regexp = "^\\w+@\\w+/.\\w+$",message = "邮箱格式错误")    private String email;    @Pattern(regexp = "^1[35789]\\d{9}$",message = "手机号格式错误")    private String phone;    public String getPhone() {        return phone;    }    public void setPhone(String phone) {        this.phone = phone;    }    public String getEmail() {        return email;    }    public void setEmail(String email) {        this.email = email;    }    public Integer getAge() {        return age;    }    public void setAge(Integer age) {        this.age = age;    }    public String getName() {        return name;    }    public void setName(String name) {        this.name = name;    }}

 

　　

第④步：配置处理器

import org.springframework.stereotype.Controller;import org.springframework.ui.Model;import org.springframework.validation.BindingResult;import org.springframework.validation.FieldError;import org.springframework.web.bind.annotation.RequestMapping;import javax.validation.Valid;import java.text.SimpleDateFormat;import java.util.Date;/** * Created by Administrator on 2018/3/30. */@Controllerpublic class FirstController {    @RequestMapping("/first")    /**     * @Valid   验证对象     * BindingResult  绑定结果     * Model    视图对象     */    public String doFirst(@Valid UserInfo userInfo, BindingResult br, Model mv) throws Exception {        //判断br中的错误数        if(br.getErrorCount()>0){  //证明至少有一个数据错误            //获取信息            FieldError name = br.getFieldError("name");            FieldError age = br.getFieldError("age");            FieldError phone = br.getFieldError("phone");            FieldError email = br.getFieldError("email");            //获取错误信息            if(name!=null){                String namemsg = name.getDefaultMessage();                //把错误信息返回到页面                mv.addAttribute("namemsg",namemsg);            }            if(age!=null){                String agemsg = age.getDefaultMessage();                mv.addAttribute("agemsg",agemsg);            }            if(phone!=null){                String phonemsg = phone.getDefaultMessage();                mv.addAttribute("phonemsg",phonemsg);            }            if(email!=null){                String emailmsg = email.getDefaultMessage();                mv.addAttribute("emailmsg",emailmsg);            }            //返回请求View            return "Validator";        }        return "doSecond";    }}

　　配置完成！

 

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