spring boot 1.4默认使用 hibernate validator

spring boot 1.4默认使用 hibernate validator 5.2.4 Final实现校验功能。hibernate validator 5.2.4 Final是JSR 349 Bean Validation 1.1的具体实现。

How to disable Hibernate validation in a Spring Boot project

As [M. Deinum] mentioned in a comment on my original post, the solution is to set:

spring.jpa.properties.javax.persistence.validation.mode=none
In the application.properties file.

Additionally, this behaviour is described here (its easy to miss because no example is provided).

http://stackoverflow.com/questions/26764532/how-to-disable-hibernate-validation-in-a-spring-boot-project

一 初步使用
hibernate vilidator主要使用注解的方式对bean进行校验，初步的例子如下所示：

package com.query;
import javax.validation.constraints.Min;
import org.hibernate.validator.constraints.NotBlank;
public class Student {
//在需要校验的字段上指定约束条件
 @NotBlank
 private String name;
 @Min(3)
 private int age;
 @NotBlank
 private String classess;

  public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public String getClassess() {
  return classess;
 }
 public void setClassess(String classess) {
  this.classess = classess;
 }

}

然后在controller中可以这样调用，加上@Validated注解即可。

package com.controller;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.learn.validate.domain.Student;

@RestController
public class ValidateController {

 @RequestMapping(value="testStudent")
 public void testStudent(@Validated Student student) {
 }
}

如果校验失败，默认会返回Spring boot 框架的出错信息。是一个json串，里面有详细的出错描述。

二 使用gruops 属性来实现区别不同的校验需求
在上面的例子中，如果Student bean想要用于两个不同的请求中，每个请求有不同的校验需求，例如一个请求只需要校验name字段,一个请求需要校验name和age两个字段，那该怎么做呢？
使用注解的groups属性可以很好的解决这个问题,如下所示：

package com.query;
import javax.validation.constraints.Min;

import org.hibernate.validator.constraints.NotBlank;

public class Student {
    //使用groups属性来给分组命名，然后在需要的地方指定命令即可
    @NotBlank(groups=NAME.class)
    private String name;
    @Min(value=3,groups=AGE.class)
    private int age;
    @NotBlank
    private String classess;

    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getAge() {
        return age;
    }
    public void setAge(int age) {
        this.age = age;
    }
    public String getClassess() {
        return classess;
    }
    public void setClassess(String classess) {
        this.classess = classess;
    }

    public interface NAME{};

    public interface AGE{};

}

根据需要在@Validated属性中指定需要校验的分组名，可以指定1到多个。指定到的分组名会全部进行校验，不指定的不校验。

package com.controller;

import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.learn.validate.domain.Student;
import com.learn.validate.domain.Student.AGE;
import com.learn.validate.domain.Student.NAME;

@RestController
public class ValidateController {

    @RequestMapping(value="testStudent")
    public void testStudent(@Validated Student student) {

    }

    @RequestMapping(value="testStudent1")
    public void testStudent1(@Validated(NAME.class) Student student) {

    }

    @RequestMapping(value="testStudent2")
    public void testStudent2(@Validated({NAME.class,AGE.class})
    Student student) {

    }
}

三 使用 @ScriptAssert 注解校验复杂的业务逻辑
如果需要校验的业务逻辑比较复杂，简单的@NotBlank，@Min注解已经无法满足需求了，这时可以使用@ScriptAssert来指定进行校验的方法，通过方法来进行复杂业务逻辑的校验，然后返回 true或false来表明是否校验成功。
例如下面的例子：

package com.query;
import javax.validation.constraints.Min;

import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.constraints.ScriptAssert;

import com.learn.validate.domain.Student.CHECK;
//通过script 属性指定进行校验的方法，传递校验的参数，
//依然可以通过groups属性指定分组名称
@ScriptAssert(lang="javascript",script="com.learn.validate.domain
.Student.checkParams(_this.name,_this.age,_this.classes)",
groups=CHECK.class)
public class Student {

 @NotBlank(groups=NAME.class)
 private String name;
 @Min(value=3,groups=AGE.class)
 private int age;
 @NotBlank
 private String classess;

 public String getName() {
  return name;
 }
 public void setName(String name) {
  this.name = name;
 }
 public int getAge() {
  return age;
 }
 public void setAge(int age) {
  this.age = age;
 }
 public String getClassess() {
  return classess;
 }
 public void setClassess(String classess) {
  this.classess = classess;
 }

 public interface NAME{};

 public interface AGE{};

 public interface CHECK{};

 //注意进行校验的方法要写成静态方法，否则会出现
 //TypeError: xxx is not a function 的错误
 public static boolean checkParams(String name,int age,String classes) {
  if(name!=null&&age>8&classes!=null)
  {
   return true;
  }
  else
  {
   return false;
  }

 }

}

在需要的地方，通过分组名称进行调用

package com.controller;

import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import com.learn.validate.domain.Student;
import com.learn.validate.domain.Student.CHECK;

@RestController
public class ValidateController {

 @RequestMapping(value="testStudent3")
 public void testStudent3(@Validated(CHECK.class) Student student) {

 }
}

原文链接：http://www.jianshu.com/p/a9b1e2f7a749

著作权归作者所有，转载请联系作者获得授权，并标注“简书作者”。

import java.util.Set;

import javax.validation.ConstraintViolation;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
import javax.validation.constraints.Max;
import javax.validation.constraints.Min;
import javax.validation.constraints.NotNull;

public class JavaxValidation {
    public static void main(String[] args) {
        Dog d = new Dog();
        d.setName("小明");
        d.setAge(2);
        ValidatorFactory vf = Validation.buildDefaultValidatorFactory();
        Validator validator = vf.getValidator();
        Set<ConstraintViolation<Dog>> set = validator.validate(d);
        for (ConstraintViolation<Dog> constraintViolation : set) {
            System.out.println(constraintViolation.getMessage());
        }
    }
}

class Dog {
    @NotNull(message = "不能为空")
    private String name;

    @Min(value = 1, message = "最少为1")
    @Max(value = 20, message = "最大为20")
    private int age;

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

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

https://my.oschina.net/p2ng/blog/336690