Spring Security自定义登录实例图解

【Spring Security自定义登录实例图解】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可访问性。
模块提供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, 如果我们想自定义登录页面, 那我们该如何做呢？
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。
参见示例。通过提供以下详细信息来创建Maven项目。

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完成后, 它将创建以下项目结构。

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安全配置
配置项目以应用spring安全性。它需要以下四个文件。创建一个包com.srcmini并将这些文件放入其中。
// AppConfig.java

package com.srcmini; 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.srcmini.controller.*" })public class AppConfig {@Beanpublic InternalResourceViewResolver viewResolver() {InternalResourceViewResolver viewResolver= new InternalResourceViewResolver(); viewResolver.setViewClass(JstlView.class); viewResolver.setPrefix("/WEB-INF/views/"); viewResolver.setSuffix(".jsp"); return viewResolver; }}

// MvcWebApplicationInitializer.java

package com.srcmini; import org.springframework.web.servlet.support.AbstractAnnotationConfigDispatcherServletInitializer; public class MvcWebApplicationInitializer extendsAbstractAnnotationConfigDispatcherServletInitializer {@Overrideprotected Class< ?> [] getRootConfigClasses() {return new Class[] { WebSecurityConfig.class }; }@Overrideprotected Class< ?> [] getServletConfigClasses() {// TODO Auto-generated method stubreturn null; }@Overrideprotected String[] getServletMappings() {return new String[] { "/" }; }}

// SecurityWebApplicationInitializer.java

package com.srcmini; import org.springframework.security.web.context.*; public class SecurityWebApplicationInitializerextends AbstractSecurityWebApplicationInitializer {}

// WebSecurityConfig.java

package com.srcmini; 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.srcmini")public class WebSecurityConfig extends WebSecurityConfigurerAdapter {@Beanpublic UserDetailsService userDetailsService() {InMemoryUserDetailsManager manager = new InMemoryUserDetailsManager(); manager.createUser(User.withDefaultPasswordEncoder().username("irfan").password("khan123").roles("ADMIN").build()); return manager; }@Overrideprotected 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。
视图
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="http://www.srcmini.com/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="http://www.srcmini.com/${_csrf.token}"/> < button type="submit" class="btn"> Log in< /button> < /form>

// index.jsp

< html> < head> < title> Home Page< /title> < /head> < body> < h3> Welcome to srcmini! < br> < /h3> < a href="http://www.srcmini.com/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="http://www.srcmini.com/logout"> logout< /a> < /body> < /html>

控制者
在com.srcmini.controller包内创建一个控制器HomeController。
// HomeController.java

package com.srcmini.controller; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.RequestMethod; @Controllerpublic class HomeController {@RequestMapping(value="http://www.srcmini.com/", method=RequestMethod.GET)public String index() {return "index"; }@RequestMapping(value="http://www.srcmini.com/login", method=RequestMethod.GET)public String login() {return "login"; }@RequestMapping(value="http://www.srcmini.com/admin", method=RequestMethod.GET)public String admin() {return "admin"; }}

项目依赖
// 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.srcmini< /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>

项目结构
我们的项目如下所示：