SpringMVC 表单验证

最新推荐文章于 2023-03-12 21:34:05 发布

青鸟88

最新推荐文章于 2023-03-12 21:34:05 发布

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分类专栏： Spring+SpringMVC+mybatis 文章标签：表单验证

原文链接：https://blog.youkuaiyun.com/xianglingchuan/article/details/73431079

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本文详细介绍了在SpringMVC框架中实现表单验证的方法，包括引入必要的jar包、定义验证规则、配置验证消息提示及实现表单提交与验证流程。

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引入相应的jar包

    <!-- start springMVC表单验证 -->
    <dependency>
        <groupId>javax.validation</groupId>
        <artifactId>validation-api</artifactId>
        <version>1.1.0.Final</version>
    </dependency>
    <dependency>
        <groupId>org.hibernate</groupId>
        <artifactId>hibernate-validator</artifactId>
        <version>5.1.2.Final</version>
    </dependency>
    <!-- end springMVC表单验证 -->
   
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验证Model对象

public class ValidatorBean {

    /**
     * 登录用户名
     */
    // message 直接提供错误信息
    @NotNull(message = "username 不能为空")
    // message 使用 {} 代表错误内容，从 resources 目录下的 ValidationMessages.properties文件中读取
    @Pattern(regexp = "[a-zA-Z0-9_]{5,10}", message = "{user.username.illegal}")
    private String username;

    /**
     * 登录密码
     */
    // ValidationMessages.properties文件中读取
    @Size(min = 5, max = 10, message = "{password.length.illegal}")
    private String password;

    /**
     * 用户姓名
     */
    @Size(min = 2, max = 30, message = "用户名长度必须大小{min},小于{max}位")
    @NotNull(message = "用户名不能为空")
    private String firstName;

    /**
     * 日期验证
     */
    @DateTimeFormat(pattern = "yyyy-MM-dd")
    @Past(message = "生日日期必须早于当前日期") // 验证注解的元素值（日期类型）比当前时间早
    private Date brithDay;

    @AssertFalse(message = "参数值必须为false")
    private Boolean isFalse;

    @AssertTrue(message = "参数值必须为true")
    private Boolean isTrue;

    @Email(message = "email格式不正确")
    private String email;

    @Length(min = 4, max = 20, message = "部门名称长度必须大于{min},小于{max}")
    @NotBlank(message = "部门名称不能为空,去掉首尾空格")
    private String section;

    @Range(min = 18, max = 60, message = "年龄必须大于{min},小于{max}")
    private int age;

    @Null(message = "参数值必须为null值")
    private String strNull;

    @NotNull(message = "参数值不能为null值")
    private String strNotNull;

    @Max(value = 20, message = "值必须大于等于{value}")
    private int intMax;

    @Min(value = 8, message = "值必须大于等于{value}")
    private int intMin;

    @DateTimeFormat(pattern = "yyyy-MM-dd")
    @Future(message = "未来日期必须大于当前日期")
    private Date futureDate;

    @Digits(integer = 5, fraction = 2, message = "Float整数最多{integer}位，小于最多{fraction}位")
    private Float floatValue;

    @DecimalMax(value = "100", message = "Long的值必须小于{value}")
    private long longMax;

    @DecimalMin(value = "1", message = "Long的值必须大于{value}")
    private long longMin;

    public String getUsername() {
        return username;
    }

    public void setUsername(String username) {
        this.username = username;
    }

    public String getPassword() {
        return password;
    }

    public void setPassword(String password) {
        this.password = password;
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public Date getBrithDay() {
        return brithDay;
    }

    public void setBrithDay(Date brithDay) {
        this.brithDay = brithDay;
    }

    public Boolean getIsFalse() {
        return isFalse;
    }

    public void setIsFalse(Boolean isFalse) {
        this.isFalse = isFalse;
    }

    public Boolean getIsTrue() {
        return isTrue;
    }

    public void setIsTrue(Boolean isTrue) {
        this.isTrue = isTrue;
    }

    public String getEmail() {
        return email;
    }

    public void setEmail(String email) {
        this.email = email;
    }

    public String getSection() {
        return section;
    }

    public void setSection(String section) {
        this.section = section;
    }

    public int getAge() {
        return age;
    }

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

    public String getStrNull() {
        return strNull;
    }

    public void setStrNull(String strNull) {
        this.strNull = strNull;
    }

    public String getStrNotNull() {
        return strNotNull;
    }

    public void setStrNotNull(String strNotNull) {
        this.strNotNull = strNotNull;
    }

    public int getIntMax() {
        return intMax;
    }

    public void setIntMax(int intMax) {
        this.intMax = intMax;
    }

    public int getIntMin() {
        return intMin;
    }

    public void setIntMin(int intMin) {
        this.intMin = intMin;
    }

    public Date getFutureDate() {
        return futureDate;
    }

    public void setFutureDate(Date futureDate) {
        this.futureDate = futureDate;
    }

    public Float getFloatValue() {
        return floatValue;
    }

    public void setFloatValue(Float floatValue) {
        this.floatValue = floatValue;
    }

    public long getLongMax() {
        return longMax;
    }

    public void setLongMax(long longMax) {
        this.longMax = longMax;
    }

    public long getLongMin() {
        return longMin;
    }

    public void setLongMin(long longMin) {
        this.longMin = longMin;
    }
}
 
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验证消息提示文件

ValidationMessages.properties

user.username.illegal=用户名格式不正确
password.length.illegal=密码[${validatedValue}]长度必须为{min}到{max}个字符
 
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暂时没有走通如何配置提示消息的国际化配置

Controller代码

@Controller
@RequestMapping("/home")
public class ValidateStudentController {


    /**
     * 表单提交方法
     */
    @RequestMapping(value="/index", method = {RequestMethod.GET})
    public String index(Model model){
        //如果模型数据中包含同名数据则不再添加，
        //如果不判断将一直重新new新的模型数据
        if(!model.containsAttribute("validatorBean")){
            ValidatorBean validatorBean = new ValidatorBean();
            model.addAttribute("validatorBean", new ValidatorBean());            
        }
        return "springmvc/student/index";
    }   
    /**
     * 表单验证方法
     */
    @RequestMapping(value="/index", method = {RequestMethod.POST})
    public String indexSave(Model model, @Valid @ModelAttribute("validatorBean") ValidatorBean validatorBean, 
            BindingResult result) throws UnsupportedEncodingException{
        //如果存在验证错误信息重定向到表单提交展示错误信息
        if(result.hasErrors()){
            return index(model);
        }      
        return "redirect:success"; 
    }   



    /**
     * 表单提交验证成功方法
     */
    @RequestMapping(value="/success")
    public String success(Model model){
        return "springmvc/student/success";
    }
}

 
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jsp代码

index.jsp

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%>
 <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>   
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
  <head>
    <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
    <title>Java验证框架测试</title>
  </head>
  <body>
    <form:form modelAttribute="validatorBean" method="post">     
        登录用户名:<form:input path="username" /><br/>
        <span style="color: red;"><form:errors path="username" /></span><br/>
        登录密码: <form:input path="password" /><br/>
        <span style="color: red;"><form:errors path="password" /></span><br/>
        用户姓名: <form:input path="firstName" /><br/>
        <span style="color: red;"><form:errors path="firstName" /></span><br/>
        出生日期: <form:input path="brithDay" /><br/>
        <span style="color: red;"><form:errors path="brithDay" /></span><br/>
        必须是False: <form:input path="isFalse" /><br/>
        <span style="color: red;"><form:errors path="isFalse" /></span><br/>
        必须是True: <form:input path="isTrue" /><br/>
        <span style="color: red;"><form:errors path="isTrue" /></span><br/>
        Email: <form:input path="email" /><br/>
        <span style="color: red;"><form:errors path="email" /></span><br/>
        部门名称: <form:input path="section" /><br/>
        <span style="color: red;"><form:errors path="section" /></span><br/>
        年龄: <form:input path="age" /><br/>
        <span style="color: red;"><form:errors path="age" /></span><br/>
        最大值: <form:input path="intMax" /><br/>
        <span style="color: red;"><form:errors path="intMax" /></span><br/>
        最小值: <form:input path="intMin" /><br/>
        <span style="color: red;"><form:errors path="intMin" /></span><br/>
        未来日期: <form:input path="futureDate" /><br/>
        <span style="color: red;"><form:errors path="futureDate" /></span><br/>       
        整数小数位验证: <form:input path="floatValue" /><br/>
        <span style="color: red;"><form:errors path="floatValue" /></span><br/> 
        最大值: <form:input path="longMax" /><br/>
        <span style="color: red;"><form:errors path="longMax" /></span><br/>
        最小值: <form:input path="longMin" /><br/>
        <span style="color: red;"><form:errors path="longMin" /></span><br/>   
        必须为null值: <form:input path="strNull" /><br/>
        <span style="color: red;"><form:errors path="strNull" /></span><br/>
        必须不为null值: <form:input path="strNotNull" /><br/>
        <span style="color: red;"><form:errors path="strNotNull" /></span><br/>           
        <input type="submit" value="提交"/>
    </form:form>
  </body>
</html>
 
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