SpringMVC使用@Valid注解进行数据验证

<dependency>
			<groupId>javax.validation</groupId>
			<artifactId>validation-api</artifactId>
			<version>1.1.0.Final</version>
		</dependency>
		<dependency>
			<groupId>org.apache.bval</groupId>
			<artifactId>bval-jsr303</artifactId>
			<version>0.5</version>
		</dependency>

实现Validator接口

package com.zkn.learnspringmvc.validtor;

import com.zkn.learnspringmvc.scope.PersonScope;
import org.springframework.util.StringUtils;
import org.springframework.validation.Errors;
import org.springframework.validation.ValidationUtils;
import org.springframework.validation.Validator;

/**
 * Created by wb-zhangkenan on 2016/9/2.
 */
public class PersonalValidtor implements Validator{

    /**
     * 判断支持的JavaBean类型
     * @param aClass
     * @return
     */
    @Override
    public boolean supports(Class<?> aClass) {
        return PersonScope.class.equals(aClass);
    }

    /**
     * 实现Validator中的validate接口
     * @param obj
     * @param errors
     */
    @Override
    public void validate(Object obj, Errors errors) {
        //把校验信息注册到Error的实现类里
        ValidationUtils.rejectIfEmpty(errors,"name",null,"姓名不能为空!");
        PersonScope personScope = (PersonScope) obj;
        if(StringUtils.isEmpty(personScope.getAddress())){
            errors.rejectValue("address",null,"家庭地址不能为空!!!!");
        }
    }
}

使用Validtor的校验实现类

//绑定PersonalValidator
    @InitBinder
    public void initBinder(WebDataBinder webDataBinder){
        webDataBinder.addValidators(new PersonalValidtor());
    }

@RequestMapping(value = "testPersonalValidtor.do")
    @ResponseBody
    //直接返回对象
    public Object testPersonalValidtor(@Valid PersonScope personScope, BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            StringBuffer sb = new StringBuffer();
            for(ObjectError objectError : bindingResult.getAllErrors()){
                sb.append(((FieldError)objectError).getField() +" : ").append(objectError.getDefaultMessage());
            }
            return sb.toString();
        }else{
            return personScope;
        }
    }

package com.zkn.learnspringmvc.news.controller;

import com.alibaba.fastjson.JSON;
import com.zkn.learnspringmvc.scope.PersonScope;
import com.zkn.learnspringmvc.validtor.PersonalValidtor;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.validation.ObjectError;
import org.springframework.web.bind.WebDataBinder;
import org.springframework.web.bind.annotation.InitBinder;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.bind.annotation.ResponseBody;

import javax.servlet.http.HttpServletResponse;
import javax.validation.Valid;

/**
 * 用来测试PersonalValidator的控制器
 * Created by wb-zhangkenan on 2016/9/2.
 */
@Controller
public class TestPersonlalValidtorController {

    //绑定PersonalValidator
    @InitBinder
    public void initBinder(WebDataBinder webDataBinder){
        webDataBinder.addValidators(new PersonalValidtor());
    }

    @RequestMapping(value = "testPersonalValidtor.do")
    @ResponseBody
    //直接返回对象
    public Object testPersonalValidtor(@Valid PersonScope personScope, BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            StringBuffer sb = new StringBuffer();
            for(ObjectError objectError : bindingResult.getAllErrors()){
                sb.append(((FieldError)objectError).getField() +" : ").append(objectError.getDefaultMessage());
            }
            return sb.toString();
        }else{
            return personScope;
        }
    }
}

package com.zkn.learnspringmvc.scope;

import java.io.Serializable;

/**
 * Person对象
 * @author zkn
 *
 */

public class PersonScope implements Serializable{

	/**
	 * 序列
	 */
	private static final long serialVersionUID = 1L;
	/**
	 * 姓名
	 */
	private String name;
	/**
	 * 年龄
	 */
	private Integer age;
	/**
	 * 家庭地址
	 */
	private String address;

	private StudentScope studentScope;

	public String getName() {
		return name;
	}
	
	public void setName(String name) {
		this.name = name;
	}
	
	public Integer getAge() {
		return age;
	}
	
	public void setAge(Integer age) {
		this.age = age;
	}

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

	public StudentScope getStudentScope() {
		return studentScope;
	}

	public void setStudentScope(StudentScope studentScope) {
		this.studentScope = studentScope;
	}

	public String getAddress() {
		return address;
	}

	public void setAddress(String address) {
		this.address = address;
	}
}

<mvc:annotation-driven validator="personalValidtor">

<bean id="personalValidtor" class="com.zkn.learnspringmvc.validtor.PersonalValidtor"/>

使用<form:errors />标签

@RequestMapping(value = "testPersonalValidtor02.do")
    public Object testPersonalValidtor01(@Valid PersonScope personScope, BindingResult bindingResult){
        if(bindingResult.hasErrors()){
            return "error";
        }else{
            return "home";
        }
    }

<%@taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<%@page pageEncoding="utf-8" contentType="text/html;utf-8"%>

<form:errors path="personScope.name"/>