Spring4下validation数据校验无效(maven)的解决

SpringMVC4使用数据校验的时候需要使用hibernate-validator的包

第一步添加依赖

   <dependency>
     <groupId>javax.validation</groupId>
     <artifactId>validation-api</artifactId>
     <version>2.0.0.Final</version>
   </dependency>
   <dependency>
     <groupId>org.hibernate</groupId>
     <artifactId>hibernate-validator</artifactId>
     <version>5.4.1.Final</version>
   </dependency>

第二步添加校验注解

package com.demo.model;
/*
* spring4 用hibernate中的validation
*
* */
import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.NotBlank;
import javax.validation.constraints.Size;
public class User {
   private String username;
   private String password;
   private String nickname;
   private String email;
   public User(){
   }
   public User(String username, String password, String nickname, String email) {
       this.username = username;
       this.password = password;
       this.nickname = nickname;
       this.email = email;
   }
   @NotBlank(message = "用户名不能为空")
   public String getUsername() {
       return username;
   }
   public void setUsername(String username) {
       this.username = username;
   }
   @Size(min = 6,max = 20,message = "密码为6-20位")
   public String getPassword() {
       return password;
   }
   public void setPassword(String password) {
       this.password = password;
   }
   public String getNickname() {
       return nickname;
   }
   public void setNickname(String nickname) {
       this.nickname = nickname;
   }
   @Email(message = "请输入合法的邮箱")
   public String getEmail() {
       return email;
   }
   public void setEmail(String email) {
       this.email = email;
   }
}

第三步在控制器中对指定参数进行校验注解

 注:BindingResult 必须紧跟在@Validate

   //@Validated指定验证对象 BindingResult紧跟Validated
   @RequestMapping(value="/add",method = RequestMethod.POST)
   public String add(@Validated User user, BindingResult br){
       System.out.println(br);
       System.out.println(br.getErrorCount());
       if(br.hasErrors())
           return "user/add";
       users.put(user.getUsername(),user);
       return "redirect:/user/users";
   }

注：这个配置也会影响到校验是否生效

<mvc:annotation-driven/>

SpringBoot-----数据验证validation(实战中,不推荐使用)

1、定义错误信息

在resources/下创建名称为ValidationMessages.properties

member.mid.notnull.error=用户名不允许为空
member.mid.email.error=用户名的注册必须输入正确的邮箱
member.mid.length.error=用户名的格式错误

2、给Vo类添加注解

package com.zemel.micorboot.vo;
import java.io.Serializable;
import java.util.Date;
import javax.validation.constraints.Email;
import javax.validation.constraints.NotNull;
import org.hibernate.validator.constraints.Length;
public class Member implements Serializable{

/**
 *
 */
private static final long serialVersionUID = 1L;
@NotNull(message="{member.mid.notnull.error}")
@Email(message="{member.mid.email.error}")
@Length(min=6,message="{member.mid.length.error}")
private String mid;
private Integer age;
private Double salary;
private Date birthday;
public String getMid() {
 return mid;
}
public void setMid(String mid) {
 this.mid = mid;
}
public Integer getAge() {
 return age;
}
public void setAge(Integer age) {
 this.age = age;
}
public Double getSalary() {
 return salary;
}
public void setSalary(Double salary) {
 this.salary = salary;
}
public Date getBirthday() {
 return birthday;
}
public void setBirthday(Date birthday) {
 this.birthday = birthday;
}
}

3、控制添加验证

@Valid Member vo, BindingResult result
package com.zemel.micorboot.controller;
import java.util.List;
import javax.validation.Valid;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
import com.zemel.micorboot.base.AbstractBaseController;
import com.zemel.micorboot.vo.Member;

@Controller
public class MemberController extends AbstractBaseController {
@GetMapping("/addPre")
public String addPre(){
 return "message/member_add";
}

@GetMapping("/add")
@ResponseBody
public Object add(@Valid Member vo, BindingResult result){
 System.out.println("【ADD方法】"+result.hasErrors());

if(result.hasErrors()){
  List<ObjectError> list = result.getAllErrors();
  list.forEach(oe -> {

});
  return result.getAllErrors();
 }
 return vo;
}
}

4、访问结果

[{"codes":["Email.member.mid","Email.mid","Email.java.lang.String","Email"],"arguments":[{"codes":["member.mid","mid"],"arguments":null,"defaultMessage":"mid","code":"mid"},[],{"defaultMessage":".*","arguments":null,"codes":[".*"]}],"defaultMessage":"&ccedil;¨&aelig;·&aring;&ccedil;&aelig;&sup3;¨&aring;&aring;&iquest;é&iexcl;&raquo;è&frac34;&aring;&yen;&aelig;&shy;&pound;&ccedil;&iexcl;&reg;&ccedil;é&reg;&ccedil;&reg;±","objectName":"member","field":"mid","rejectedValue":"xx","bindingFailure":false,"code":"Email"}]

来源：https://blog.csdn.net/g1418377085/article/details/77206822