Spring validator参数校验

框架整合

依赖包

<dependency>  
     <groupId>javax.validationgroupId>  
     <artifactId>validation-apiartifactId>  
     <version>1.1.0.Finalversion>  
 dependency>  
<dependency>  
     <groupId>org.hibernategroupId>  
     <artifactId>hibernate-validatorartifactId>  
     <version>5.1.2.Finalversion>  
dependency>

@Valid是javax.validation里的；@Valid不提供分组功能。
@Validated是@Valid 的一次封装，是Spring提供的校验机制使用。

默认校验参数

JSR提供的校验注解

注解	适用的数据类型	说明
@AssertFalse	Boolean, boolean	验证注解的元素值是false
@AssertTrue	Boolean, boolean	验证注解的元素值是true
@DecimalMax（value=x）	BigDecimal, BigInteger, String, byte,short, int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number andCharSequence.	验证注解的元素值小于等于@ DecimalMax指定的value值
@DecimalMin（value=x）	BigDecimal, BigInteger, String, byte,short, int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number andCharSequence.	验证注解的元素值小于等于@ DecimalMin指定的value值
@Digits(integer=整数位数, fraction=小数位数)	BigDecimal, BigInteger, String, byte,short, int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of Number andCharSequence.	验证注解的元素值的整数位数和小数位数上限
@Future	java.util.Date, java.util.Calendar; Additionally supported by HV, if theJoda Time date/time API is on the class path: any implementations ofReadablePartial andReadableInstant.	验证注解的元素值（日期类型）比当前时间晚
@Max（value=x）	BigDecimal, BigInteger, byte, short,int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type ofCharSequence (the numeric value represented by the character sequence is evaluated), any sub-type of Number.	验证注解的元素值小于等于@Max指定的value值
@Min（value=x）	BigDecimal, BigInteger, byte, short,int, long and the respective wrappers of the primitive types. Additionally supported by HV: any sub-type of CharSequence (the numeric value represented by the char sequence is evaluated), any sub-type of Number.	验证注解的元素值大于等于@Min指定的value值
@NotNull	Any type	验证注解的元素值不是null
@Null	Any type	验证注解的元素值是null
@Past	java.util.Date, java.util.Calendar; Additionally supported by HV, if theJoda Time date/time API is on the class path: any implementations ofReadablePartial andReadableInstant.	验证注解的元素值（日期类型）比当前时间早
@Pattern(regex=正则表达式, flag=)	String. Additionally supported by HV: any sub-type of CharSequence.	验证注解的元素值与指定的正则表达式匹配
@Size(min=最小值, max=最大值)	String, Collection, Map and arrays. Additionally supported by HV: any sub-type of CharSequence.	验证注解的元素值的在min和max（包含）指定区间之内，如字符长度、集合大小
@Valid	Any non-primitive type（引用类型）	验证关联的对象，如账户对象里有一个订单对象，指定验证订单对象

Hibernate Validator提供的校验注解：

注解	适用的数据类型	说明
@NotEmpty	CharSequence,Collection, Map and Arrays	验证注解的元素值不为null且不为空（字符串长度不为0、集合大小不为0）
@Range(min=最小值, max=最大值)	CharSequence, Collection, Map and Arrays,BigDecimal, BigInteger, CharSequence, byte, short, int, long and the respective wrappers of the primitive types	验证注解的元素值在最小值和最大值之间
@NotBlank	CharSequence	验证注解的元素值不为空（不为null、去除首位空格后长度为0），不同于@NotEmpty，@NotBlank只应用于字符串且在比较时会去除字符串的空格
@Length(min=下限, max=上限)	CharSequence	验证注解的元素值长度在min和max区间内
@Email	CharSequence	验证注解的元素值是Email，也可以通过正则表达式和flag指定自定义的email格式

Spring Bean校验

package com.gz.springmvc;

import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty;

/**
 * 
功能: 用户实体类
 * 
版本: 1.0
 * 
开发人员: 弓振
 * 
创建日期: 2018年4月26日
 * 
修改日期: 2018年4月26日
 * 
修改列表:
 */
public class User {

	@NotEmpty(message = "用户名不能为空")  
	@Length(min = 5, max = 20, message = "用户名长度必须在5-20之间") 
	private String name;
	
	@NotEmpty(message = "用户密码不能为空")  
	@Length(min = 5, max = 20, message = "用户密码长度必须在5-20之间") 
	private String pwd;

	public String getName() {
		return name;
	}

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

	public String getPwd() {
		return pwd;
	}

	public void setPwd(String pwd) {
		this.pwd = pwd;
	}

	@Override
	public String toString() {
		return "User [name=" + name + ", pwd=" + pwd + "]";
	}
}

package com.gz.springmvc;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Description: validatorController
 * @author gz
 * @date 2018年2月12日
 */
@RestController
public class ValidatorControllerBean {

	private static final Logger logger = LoggerFactory.getLogger(ValidatorControllerBean.class);
	
	/**
	 * @Description: validator 请求
	 * @param user
	 * @param result1
	 * @return Map    
	 */
	@RequestMapping(value="/beanValid",method=RequestMethod.GET)
	public Map beanValid(@Validated User user,BindingResult errors) {
		logger.info("【beanValid开始】param user:{}",user);
		
		Map result = new HashMap();
		if(errors.hasErrors()){
			List errorList = new ArrayList();
            for (ObjectError error : errors.getAllErrors()) {
            	errorList.add(error.getDefaultMessage());
            }
            Map errorReturn = new HashMap();
    		errorReturn.put("ERROR", errorList);
            return errorReturn;
        }
		
		result.put("SUCCESS", "SUCCESS");
		return result;
	}
	
}

响应结果：{“ERROR”: [“用户名不能为空”,“用户密码不能为空”]}

Spring Bean校验代码示例

Spring 方法级验证

注：如通过以下两种方式获取数据，@Validated将失效

1.用@RequestParam注解获取
2.直接在方法上写入对应的属性名，如：String name

增加方法级验证步骤：

1. 将MethodValidationPostProcessor增加到Spring上下中
   
2. 在***类***上增加@Validated

示例：

package com.gz.springmvc;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import javax.servlet.http.HttpServletRequest;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;

import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotEmpty;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.RestController;

/**
 * @Description: validatorController
 * @author gz
 * @date 2018年2月12日
 */
@RestController
@Validated
public class ValidatorControllerMethod {

	private static final Logger logger = LoggerFactory.getLogger(ValidatorControllerMethod.class);
	
	/**
	 * @Description: 异常处理
	 * @param e
	 * @param request
	 * @return Map    
	 */
	@ExceptionHandler(ConstraintViolationException.class)
	@ResponseBody
	public Map execption(Exception e,HttpServletRequest request) {
		ConstraintViolationException exception = (ConstraintViolationException)e;
		Set> errors = exception.getConstraintViolations();
		Iterator> itera = errors.iterator();
		List errorList = new ArrayList();
		while(itera.hasNext()) {
			errorList.add(itera.next().getMessage());
		}
		Map errorReturn = new HashMap();
		errorReturn.put("ERROR", errorList);
		return errorReturn;
	}
	
	
	/**
	 * @Description: validator Get请求
	 * @param name1
	 * @return Map    
	 */
	@RequestMapping(value="/methodValid",method=RequestMethod.GET)
	public Map loginGet(
			@NotEmpty(message = "用户名空") 
			@Length(min = 5, max = 20, message = "用户名太短，应该在{min}--{max}") String name) {
		logger.info("【login GET开始】param name:{}",name);
		
		Map result = new HashMap();
		result.put("SUCCESS", "SUCCESS");
		return result;
	}
	
}

响应结果：{“ERROR”: [“用户名空”]}

Spring 方法级验证校验

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spring 自定义参数校验