JSR303校验

Posted 2020-09-23 腾飞新星

由于Validation框架通过硬编码完成数据校验，在实际开发中会显得比较麻烦，因此现代开发更加推荐使用JSR303完成数据校验。

JSR303是java为bean数据合法性校验锁提供的一个标准规范，叫做Bean Validation。它是一个运行时的数据验证框架，在验证之后验证的错误信息会被马上返回。

JSR303是一个规范，它的核心接口是javax.validation.Validator,该接口根据目标对象类中所标注的校验注解进行数据校验，并得到校验结果。

目前有两个实现，第一个是Hibernate Validator(下载地址http://hibernate.org/validator/)，第二个Apache bval

 

package com.domain;

import java.io.Serializable;
import java.util.Date;

import javax.validation.constraints.Pattern;

import org.hibernate.validator.constraints.Email;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.NotBlank;
import org.hibernate.validator.constraints.Range;
import org.springframework.format.annotation.DateTimeFormat;

public class User implements Serializable{
    
    @NotBlank(message="NotBlank.user.loginname")
    private String loginname;
    @NotBlank(message="NotBlank.user.password")
    @Length(min=6,max=8,message="Length.user.password")
    private String password;
    @NotBlank(message="NotBlank.user.username")
    private String username;
    @Email(message="Email.user.youxiang")
    private String youxiang;
    @Range(min=15,max=60,message="Range.user.nianling")
    private String nianling;
    //日期使用注解方式转换
    @DateTimeFormat(pattern="yyyy-MM-dd")
    private Date shengri;
    @Pattern(regexp="[1],[3,8],[3,6,9][0-9]{8}",message="Patter.user.dianhua")
    private String dianhua;
    public String getLoginname() {
        return loginname;
    }
    public void setLoginname(String loginname) {
        this.loginname = loginname;
    }
    public String getPassword() {
        return password;
    }
    public void setPassword(String password) {
        this.password = password;
    }
    public String getUsername() {
        return username;
    }
    public void setUsername(String username) {
        this.username = username;
    }
    public String getYouxiang() {
        return youxiang;
    }
    public void setYouxiang(String youxiang) {
        this.youxiang = youxiang;
    }
    public String getNianling() {
        return nianling;
    }
    public void setNianling(String nianling) {
        this.nianling = nianling;
    }
    public Date getShengri() {
        return shengri;
    }
    public void setShengri(Date shengri) {
        this.shengri = shengri;
    }
    public String getDianhua() {
        return dianhua;
    }
    public void setDianhua(String dianhua) {
        this.dianhua = dianhua;
    }
    
    
}

package com.controller;

import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.Errors;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import com.domain.User;

@Controller
public class UserController {

    @RequestMapping(value="/{formName}")
    public String loginForm(@PathVariable String formName,Model model)
    {
        User user = new User();
        model.addAttribute("user", user);
        return formName; 
    }
    
    //使用@Valid注解对提交的数据进行校验
    @RequestMapping(value="/login",method=RequestMethod.POST)
    public String login(@Valid @ModelAttribute User user,Errors errors,Model model)
    {
        if(errors.hasErrors())
        {
            return "registerForm";
        }
        return "success";
    }
    
}

<form:form modelAttribute="user" method="post" action="login">
        <table>
            <tr>
                <td>登录名</td>
                <td><form:input path="loginname"/></td>
                <td><form:errors path="loginname" cssStyle="color:Red"></form:errors></td>
                <td></td>
            </tr>
            <tr>
                <td>密码</td>
                <td><form:input path="password"/></td>
                <td><form:errors path="password" cssStyle="color:Red"></form:errors></td>
                <td></td>
            </tr>
            <tr>
                <td>用户名</td>
                <td><form:input path="username"/></td>
                <td><form:errors path="username" cssStyle="color:Red"></form:errors></td>
            </tr>
            <tr>
                <td>年龄</td>
                <td><form:input path="nianling"/></td>
                <td><form:errors path="nianling" cssStyle="color:Red"></form:errors></td>
            </tr>
            <tr>
                <td>邮箱</td>
                <td><form:input path="youxiang"/></td>
                <td><form:errors path="youxiang" cssStyle="color:Red"></form:errors></td>
            </tr>
            <tr>
                <td>生日</td>
                <td><form:input path="shengri"/></td>
                <td><form:errors path="shengri" cssStyle="color:Red"></form:errors></td>
            </tr>
            <tr>
                <td>电话</td>
                <td><form:input path="dianhua"/></td>
                <td><form:errors path="dianhua" cssStyle="color:Red"></form:errors></td>
            </tr>
            <tr>
                <td><input type="submit" value="提交"></td>
            </tr>
        </table>
    </form:form>

<context:component-scan base-package="com.controller"></context:component-scan>
          <mvc:annotation-driven></mvc:annotation-driven>
        <!-- 配置视图解析器 如何把handler 方法返回值解析为实际的物理视图 -->
        <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
            <property name="prefix">
                <value>/WEB-INF/content/</value>
            </property>
            <property name="suffix">
                <value>.jsp</value>
            </property>
        </bean>
        
        <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
            <property name="basenames" value="classpath:messages"></property>
        </bean>