Spring Security 4 安全视图片段使用标签（Spring Security 标签）

时间：2016-05-06 15:12:22 阅读：376 评论：0 收藏：0 [点我收藏+]

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原文地址： http://websystique.com/spring-security/spring-security-4-secure-view-layer-using-taglibs/

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本教程向你展示怎样创建安全视图层，Spring MVC web 应用中，使用Spring Security 标签，基于用户角色显示或者隐藏部分jsp或者视图。

第一步,想使用Spring Security标签需要在pom.xml文件中添加 spring-security-taglibs依赖

<dependency>
    <groupId>org.springframework.security</groupId>
    <artifactId>spring-security-taglibs</artifactId>
    <version>4.0.1.RELEASE</version>
</dependency>

下一步，在views或者jsp页面头添加包含标签

<%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags"%>

最后，我们可以使用Spring Security 表单式中hasRole, hasAnyRole等标签，如下：

<%@ page language="java" contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core"%>
<%@ taglib prefix="sec" uri="http://www.springframework.org/security/tags"%>
<html>
<head>
    <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
    <title>Welcome page</title>
</head>
<body>
    Dear <strong>${user}</strong>, Welcome to Home Page.
    <a href="<c:url value="/logout" />">Logout</a>
 
    <br/>
    <br/>
    <div>
        <label>View all information| This part is visible to Everyone</label>
    </div>
 
    <br/>
    <div>
        <sec:authorize access="hasRole('ADMIN')">
            <label><a href="#">Edit this page</a> | This part is visible only to ADMIN</label>
        </sec:authorize>
    </div>
 
    <br/>
    <div>
        <sec:authorize access="hasRole('ADMIN') and hasRole('DBA')">
            <label><a href="#">Start backup</a> | This part is visible only to one who is both ADMIN & DBA</label>
        </sec:authorize>
    </div>
</html

如果你需要根据角色显示或者隐藏视图中的片段，可以参考上面的例子。

下面是本例中 Security Configuration 的配置：

package com.websystique.springsecurity.configuration;
 
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.security.config.annotation.authentication.builders.AuthenticationManagerBuilder;
import org.springframework.security.config.annotation.web.builders.HttpSecurity;
import org.springframework.security.config.annotation.web.configuration.EnableWebSecurity;
import org.springframework.security.config.annotation.web.configuration.WebSecurityConfigurerAdapter;
 
@Configuration
@EnableWebSecurity
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {
 
     
    @Autowired
    public void configureGlobalSecurity(AuthenticationManagerBuilder auth) throws Exception {
        auth.inMemoryAuthentication().withUser("bill").password("abc123").roles("USER");
        auth.inMemoryAuthentication().withUser("admin").password("root123").roles("ADMIN");
        auth.inMemoryAuthentication().withUser("dba").password("root123").roles("ADMIN","DBA");
    }
     
    @Override
    protected void configure(HttpSecurity http) throws Exception {
       
      http.authorizeRequests()
        .antMatchers("/", "/home").access("hasRole('USER') or hasRole('ADMIN') or hasRole('DBA')")
        .and().formLogin().loginPage("/login")
        .usernameParameter("ssoId").passwordParameter("password")
        .and().exceptionHandling().accessDeniedPage("/Access_Denied");
    }
}

上面配置对应的xml配置如下：

<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-4.1.xsd
    http://www.springframework.org/schema/security http://www.springframework.org/schema/security/spring-security-4.0.xsd">
      
    <http auto-config="true" >
        <intercept-url pattern="/"     access="hasRole('USER') or hasRole('ADMIN') or hasRole('DBA')" />
        <intercept-url pattern="/home" access="hasRole('USER') or hasRole('ADMIN') or hasRole('DBA')" />
        <form-login  login-page="/login"
                     username-parameter="ssoId"
                     password-parameter="password"
                     authentication-failure-url="/Access_Denied" />
    </http>
  
    <authentication-manager >
        <authentication-provider>
            <user-service>
                <user name="bill"  password="abc123"  authorities="ROLE_USER" />
                <user name="admin" password="root123" authorities="ROLE_ADMIN" />
                <user name="dba"   password="root123" authorities="ROLE_ADMIN,ROLE_DBA" />
            </user-service>
        </authentication-provider>
    </authentication-manager>
      
     
</beans:beans>

controller

package com.websystique.springsecurity.controller;
 
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
 
import org.springframework.security.core.Authentication;
import org.springframework.security.core.context.SecurityContextHolder;
import org.springframework.security.core.userdetails.UserDetails;
import org.springframework.security.web.authentication.logout.SecurityContextLogoutHandler;
import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
 
@Controller
public class HelloWorldController {
 
     
    @RequestMapping(value = { "/", "/home" }, method = RequestMethod.GET)
    public String homePage(ModelMap model) {
        model.addAttribute("user", getPrincipal());
        return "welcome";
    }
 
    @RequestMapping(value = "/Access_Denied", method = RequestMethod.GET)
    public String accessDeniedPage(ModelMap model) {
        model.addAttribute("user", getPrincipal());
        return "accessDenied";
    }
 
    @RequestMapping(value = "/login", method = RequestMethod.GET)
    public String loginPage() {
        return "login";
    }
 
    @RequestMapping(value="/logout", method = RequestMethod.GET)
    public String logoutPage (HttpServletRequest request, HttpServletResponse response) {
        Authentication auth = SecurityContextHolder.getContext().getAuthentication();
        if (auth != null){    
            new SecurityContextLogoutHandler().logout(request, response, auth);
        }
        return "redirect:/login?logout";
    }
 
    private String getPrincipal(){
        String userName = null;
        Object principal = SecurityContextHolder.getContext().getAuthentication().getPrincipal();
 
        if (principal instanceof UserDetails) {
            userName = ((UserDetails)principal).getUsername();
        } else {
            userName = principal.toString();
        }
        return userName;
    }
 
}

其他代码和本系列其他文章一样。