Spring Security提供了它自己的内置登录模块来对用户进行身份验证。它验证用户凭据并提供对应用程序的访问权限。
该模块呈现的登录页面是内置的。因此,我们不需要创建新的jsp页面。但是,如果我们要自定义登录页面,那我们该怎么做呢?
答案是,我们可以创建自己的jsp登录页面并将其集成到应用程序中。在本主题中,我们将创建一个自定义登录页面并将使用它来登录。
请参见示例。通过提供以下详细信息来创建maven项目。
完成后,它将创建以下项目结构。
配置项目以应用Spring security性。它需要以下四个文件。创建一个包 com.nhooo 并将这些文件放入其中。
//AppConfig.java
package com.nhooo;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.EnableWebMvc;
import org.springframework.web.servlet.view.InternalResourceViewResolver;
import org.springframework.web.servlet.view.JstlView;
@EnableWebMvc
@Configuration
@ComponentScan({ "com.nhooo.controller.*" })
public class AppConfig {
@Bean
public InternalResourceViewResolver viewResolver() {
InternalResourceViewResolver viewResolver
= new InternalResourceViewResolver();
viewResolver.setViewClass(JstlView.class);
viewResolver.setPrefix("/WEB-INF/views/");
viewResolver.setSuffix(".jsp");
return viewResolver;
}
}
//MvcWebApplicationInitializer.java
package com.nhooo;
import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer;
public class MvcWebApplicationInitializer extends
AbstractAnnotationConfigDispatcherServletInitializer {
@Override
protected Class<?>[] getRootConfigClasses() {
return new Class[] { WebSecurityConfig.class };
}
@Override
protected Class<?>[] getServletConfigClasses() {
// TOdo Auto-generated method stub
return null;
}
@Override
protected String[] getServletMappings() {
return new String[] { "/" };
}
}
//SecurityWebApplicationInitializer.java
package com.nhooo;
import org.springframework.security.web.context.*;
public class SecurityWebApplicationInitializer
extends AbstractSecurityWebApplicationInitializer {
}
//WebSecurityConfig.java
package com.nhooo;
import org.springframework.context.annotation.*;
//import org.springframework.security.config.annotation.authentication.builders.*;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.*;
import org.springframework.security.core.userdetails.*;
//import org.springframework.security.core.userdetails.UserDetailsService;
import org.springframework.security.provisioning.InMemoryUserDetailsManager;
import org.springframework.security.web.util.matcher.AntPathRequestMatcher;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
@EnableWebSecurity
@ComponentScan("com.nhooo")
public class WebSecurityConfig extends WebSecurityConfigurerAdapter {
@Bean
public UserDetailsService userDetailsService() {
InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager();
manager.createUser(User.withDefaultPasswordEncoder()
.username("irfan").password("khan123").roles("ADMIN").build());
return manager;
}
@Override
protected void configure(HttpSecurity http) throws Exception {
http.authorizeRequests().
antMatchers("/index", "/user","/").permitAll()
.antMatchers("/admin").authenticated()
.and()
.formLogin()
.loginPage("/login")
.and()
.logout()
.logoutRequestMatcher(new AntPathRequestMatcher("/logout"));
}
}
请参阅,在configure方法中,在formLogin()之后,使用方法 loginPage("/login")。这是调用自定义登录页面所需的实际方法。
首先创建我们自己的登录页面。根据Spring官员的说法,登录页面应如下所示。
//login.jsp
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<c:url value="/login" var="loginUrl"/>
<form action="${loginUrl}" method="post">
<c:if test="${param.error != null}">
<p>
Invalid username and password.
</p>
</c:if>
<c:if test="${param.logout != null}">
<p>
You have been logged out.
</p>
</c:if>
<p>
<label for="username">Username</label>
<input type="text" id="username" name="username"/>
</p>
<p>
<label for="password">Password</label>
<input type="password" id="password" name="password"/>
</p>
<input type="hidden"
name="${_csrf.parameterName}"
value="${_csrf.token}"/>
<button type="submit" class="btn">Log in</button>
</form>
//index.jsp
<html> <head> <title>Home Page</title> </head> <body> <h3> Welcome to Nhooo! <br> </h3> <a href="admin">Login here</a> </body> </html>
//admin.jsp
<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> <title>Home Page</title> </head> <body> Login Successful! <a href="logout">logout</a> </body> </html>
在com.nhooo.controller包内创建一个控制器HomeController。
//HomeController.java
package com.nhooo.controller;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
@Controller
public class HomeController {
@RequestMapping(value="/", method=RequestMethod.GET)
public String index() {
return "index";
}
@RequestMapping(value="/login", method=RequestMethod.GET)
public String login() {
return "login";
}
@RequestMapping(value="/admin", method=RequestMethod.GET)
public String admin() {
return "admin";
}
}
//pom.xml
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"> <modelVersion>4.0.0</modelVersion> <groupId>com.nhooo</groupId> <artifactId>springcustomlogin</artifactId> <version>0.0.1-SNAPSHOT</version> <packaging>war</packaging> <properties> <maven.compiler.target>1.8</maven.compiler.target> <maven.compiler.source>1.8</maven.compiler.source> </properties> <dependencies> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>5.0.2.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-web</artifactId> <version>5.0.0.RELEASE</version> </dependency> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-core</artifactId> <version>5.0.4.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/org.springframework.security/spring-security-config --> <dependency> <groupId>org.springframework.security</groupId> <artifactId>spring-security-config</artifactId> <version>5.0.4.RELEASE</version> </dependency> <!-- https://mvnrepository.com/artifact/javax.servlet/javax.servlet-api --> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> <scope>provided</scope> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> </dependencies> <build> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-war-plugin</artifactId> <version>2.6</version> <configuration> <failOnMissingWebXml>false</failOnMissingWebXml> </configuration> </plugin> </plugins> </build> </project>
我们的项目如下所示:
输出:
现在,通过提供用户凭据登录。
看,它工作正常。现在,我们可以根据需要创建更具装饰性和个性化的装饰。