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。

完成后, 它将创建以下项目结构。

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 {  
    @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.srcmini;  
  
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.srcmini;  
    import org.springframework.security.web.context.*;  
      
    public class SecurityWebApplicationInitializer  
        extends 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 {  
  
@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。

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="/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 srcmini! <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>

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;  
@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";  
    }  
}

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：

运行服务器

输出

现在, 通过提供用户凭据登录。

瞧, 一切正常。现在, 我们可以根据需要创建更具装饰性和定制性的产品。

下载此示例。