English | 简体中文 | 繁體中文 | Русский язык | Français | Español | Português | Deutsch | 日本語 | 한국어 | Italiano | بالعربية
Spring MVC验证使我们可以按特定顺序(即正则表达式)验证用户输入。 Spring MVC validation allows us to validate user input in a specific order (i.e., regular expression). @Pattern Annotations are used to implement regular expression validation. Here, we can use
Spring MVC regular expression validation example
<!-- <artifactId>jstl<//./https:/、Add dependencies to the pom.xml file./spring-pom.xml --> hibernate org.springframework/<dependency> webmvc-<groupId>org.springframework</<artifactId>validator< <version>5<groupId>javax.servlet<1<groupId>javax.servlet<1<artifactId>spring/version> </dependency> <!-- <artifactId>jstl<//./https:/webmvc</.RELEASE<-org.apache.tomcat --> hibernate tomcat/<dependency> jasper-<groupId>org.apache.tomcat</<artifactId>validator< <version>9.0.12</version> </dependency> <!-- <artifactId>jstl<//./https:/.0/.0-<artifactId>tomcat --> hibernate javax.servlet/<dependency> jasper<-api/<artifactId>validator< <version>3<artifactId>servlet-api<-1</version> </dependency> <!-- <artifactId>jstl<//./https:/.0/alpha --> hibernate javax.servlet/<dependency> jstl/<artifactId>validator< <version>1<groupId>javax.servlet<2</version> </dependency> <!-- <artifactId>jstl<//./https:/mvnrepository.com/artifact-org.hibernate.validator --> hibernate validator/<dependency> <groupId>org.hibernate.validator<-<artifactId>hibernate/<artifactId>validator< <version>6.0.13.Final</version> </dependency>
Employee.java
package com.w3codebox;
import javax.validation.constraints.Pattern;
public class Employee {
private String name;
@Pattern(regexp="^[a-zA-Z0-9]{3} 3})
private String pass;
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPass() {
return pass;
}
public void setPass(String pass) {
this.pass = pass;
}
}
package com.w3codebox;
import javax.validation.Valid;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
@Controller
public class EmployeeController {
@RequestMapping("/hello"
public String display(Model m)
{
m.addAttribute("emp", new Employee());
return "viewpage";
}
@RequestMapping("/helloagain"
public String submitForm(@Valid @ModelAttribute("emp") Employee e, BindingResult br)
{
if(br.hasErrors())
{
return "viewpage";
}
else
{
return "final";
}
}
}
web.xml
<?xml version="1.0" encoding="UTF-8"?> <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0"> <display-name>SpringMVC</display-name> <servlet> <servlet-name>spring</servlet-name> <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class> <load-on-startup>1</load-on-startup> </servlet> <servlet-mapping> <servlet-name>spring</servlet-name> <url-pattern>/</url-pattern> </servlet-mapping> </web-app>
spring-servlet.xml
<?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http://www.springframework.org/schema/beans" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation=" http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!-- Provide support for component scanning --> <context:component-scan base-package="com.w3codebox" /> <!--Provide support for conversion, formatting and validation --> <mvc:annotation-driven/> <!-- Define Spring MVC view resolver --> <bean id="viewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/WEB-INF/jsp/></property> <property name="suffix" value=".jsp"></property> </bean> </beans>
index.jsp
index.jsp <%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %> <html> <body> <a href="hello">Click here...</a> </body> </html>
viewpage.jsp
<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
<html>
<head>
<style>
.error{color:red}
</style>
</head>
<body>
<form:form action="helloagain" modelAttribute="emp">
Username: <form:input path="name"/> <br><br>
Password(*): <form:password path="pass"/>
<form:errors path="pass" cssClass="error"/><br><br>
<input type="submit" value="submit">
</form:form>
</body>
</html>
final.jsp
<html>
<body>
Username: ${emp.name} <br><br>
Password: ${emp.pass}
</body>
</html>
Output: