SpringSecurity 在MVC 中的简单使用（翻译的，稍加改动）

Spring Security允许开发人员轻松地将安全功能集成到J2EE Web应用程序中，它通过Servlet过滤器实现“用户自定义”安全检查。

在本教程中，我们将向您展示如何在Spring MVC中集成Spring Security 3.0并安全访问。在集成成功后，当我们查看页面的内容时用户需要先输入正确的“用户名”和“密码”。

1.目录结构

项目最终目录如下所示：

SpringSecurity 在MVC 中的简单使用（翻译的，稍加改动）

2.Spring Security依赖关系

为了正常运行 Spring security , 你需要加入 “spring-security-core.jar“, “spring-security-web.jar” and “spring-security-config.jar“. 在Maven库中你需要加入Spring配置库

pom.xml

        <!-- Spring Security -->

        <dependency>

            <groupId>org.springframework.security</groupId>

            <artifactId>spring-security-core</artifactId>

            <version>${org.springframework-version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.security</groupId>

            <artifactId>spring-security-web</artifactId>

            <version>${org.springframework-version}</version>

        </dependency>

        <dependency>

            <groupId>org.springframework.security</groupId>

            <artifactId>spring-security-config</artifactId>

            <version>${org.springframework-version}</version>

        </dependency>

3.Spring MVC Web应用程序

当访问“/welcome”跳转到“home.jsp”页面，稍后用Spring Security安全访问这个链接。

HomeController.java

package com.jd.vicapp;

import org.springframework.stereotype.Controller;

import org.springframework.ui.Model;

import org.springframework.web.bind.annotation.RequestMapping;

import org.springframework.web.bind.annotation.RequestMethod;

@Controller

@RequestMapping("/welcome")

public class HomeController {

    @RequestMapping(method = RequestMethod.GET)

    public String printWelcome(Model model) {

        model.addAttribute("message", "Spring Security Hello World");

        return "home";

    }

}

home.jsp

<html>

<body>

    <h1>Message : ${message}</h1>

</body>

</html>

4.Spring Secuity:用户验证

创建一个单独的Spring配置文件去定义Spring Security相关的东西。它要实现的是：只有用户输入了正确的用户名“mkyong”和密码“123456”才可以访问“/welcome” 。

下面的Spring配置文件你应该明白是什么意思。

spring-security.xml

<beans:beans xmlns="http://www.springframework.org/schema/security"

    xmlns:beans="http://www.springframework.org/schema/beans"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://www.springframework.org/schema/beans

    http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

    http://www.springframework.org/schema/security

    http://www.springframework.org/schema/security/spring-security-3.1.xsd">

    <http auto-config="true">

        <intercept-url pattern="/" access="ROLE_USER" />

    </http>

    <authentication-manager>

      <authentication-provider>

        <user-service>

        <user name="victorruan" password="123456" authorities="ROLE_USER" />

        </user-service>

      </authentication-provider>

    </authentication-manager>

</beans:beans>

5.整合Spring Security

想要在Web应用程序中整合Spring Security,只需加入“DelegatingFilterProxy”作为Servlet过滤器拦截到来的请求即可。

web.xml

<?xml version="1.0" encoding="UTF-8"?>

<web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"

    xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

    xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">

    <!-- The definition of the Root Spring Container shared by all Servlets and Filters -->

    <context-param>

        <param-name>contextConfigLocation</param-name>

        <param-value>/WEB-INF/spring/root-context.xml,

            /WEB-INF/spring/spring-security.xml        </param-value>

    </context-param>

    <!-- Creates the Spring Container shared by all Servlets and Filters -->

    <listener>

        <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>

    </listener>

    <!-- Processes application requests -->

    <servlet>

        <servlet-name>appServlet</servlet-name>

        <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

        <init-param>

            <param-name>contextConfigLocation</param-name>

            <param-value>

            /WEB-INF/spring/appServlet/servlet-context.xml

            </param-value>

        </init-param>

        <load-on-startup>1</load-on-startup>

    </servlet>

    <servlet-mapping>

        <servlet-name>appServlet</servlet-name>

        <url-pattern>/</url-pattern>

    </servlet-mapping>

       <!-- Spring Security -->

    <filter>

        <filter-name>springSecurityFilterChain</filter-name>

        <filter-class>

                  org.springframework.web.filter.DelegatingFilterProxy

                </filter-class>

    </filter>

    <filter-mapping>

        <filter-name>springSecurityFilterChain</filter-name>

        <url-pattern>/*</url-pattern>

    </filter-mapping>

</web-app>