简介
Spring Security是一个专注于为Java程序提供身份认证和授权的框架，他可以轻松扩展以满足自定义的需求
特征
- 对身份的认证和授权提供全面的、可扩展的支持
- 防止各种攻击，如回话固定攻击、点击劫持、csrf攻击等
- 支持与Servlet API、Spring MVC等Web技术集成
引入依赖
xml
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-security</artifactId>
</dependency>只要引入依赖，Spring Security会立刻对该项目生效。自动生成账号密码管理用户登录，并使用它自带的登录界面。
更改Spring Security的配置
java
// User.java
public class User implements UserDetails {
private int id;
private String username;
private String password;
private String salt;
private String email;
private int type;
private int status;
private String activationCode;
private String headerUrl;
private Date createTime;
public int getId() {
return id;
}
public void setId(int id) {
this.id = id;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getSalt() {
return salt;
}
public void setSalt(String salt) {
this.salt = salt;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public int getType() {
return type;
}
public void setType(int type) {
this.type = type;
}
public int getStatus() {
return status;
}
public void setStatus(int status) {
this.status = status;
}
public String getActivationCode() {
return activationCode;
}
public void setActivationCode(String activationCode) {
this.activationCode = activationCode;
}
public String getHeaderUrl() {
return headerUrl;
}
public void setHeaderUrl(String headerUrl) {
this.headerUrl = headerUrl;
}
public Date getCreateTime() {
return createTime;
}
public void setCreateTime(Date createTime) {
this.createTime = createTime;
}
@Override
public String toString() {
return "User{" +
"id=" + id +
", username='" + username + '\'' +
", password='" + password + '\'' +
", salt='" + salt + '\'' +
", email='" + email + '\'' +
", type=" + type +
", status=" + status +
", activationCode='" + activationCode + '\'' +
", headerUrl='" + headerUrl + '\'' +
", createTime=" + createTime +
'}';
}
// true: 账号未过期.
@Override
public boolean isAccountNonExpired() {
return true;
}
// true: 账号未锁定.
@Override
public boolean isAccountNonLocked() {
return true;
}
// true: 凭证未过期.
@Override
public boolean isCredentialsNonExpired() {
return true;
}
// true: 账号可用.
@Override
public boolean isEnabled() {
return true;
}
@Override
public Collection<? extends GrantedAuthority> getAuthorities() {
List<GrantedAuthority> list = new ArrayList<>();
list.add(new GrantedAuthority() {
@Override
public String getAuthority() {
switch (type) {
case 1:
return "ADMIN";
default:
return "USER";
}
}
});
return list;
}
}
java
// UserService.java
// Spring Security底层本身就有自动判断账号密码的功能，依赖于UserDetailsService接口
// 在UserService中实现的原因是UserService中有查询用户的功能
@Service
public class UserService implements UserDetailsService {
@Autowired
private UserMapper userMapper;
public User findUserByName(String username) {
return userMapper.selectByName(username);
}
@Override
public UserDetails loadUserByUsername(String username) throws UsernameNotFoundException {
return this.findUserByName(username);
}
}Spring Security配置类：
java
// SecurityConfig.java
@Configuration
public class SecurityConfig extends WebSecurityConfigurerAdapter {
@Autowired
private UserService userService;
@Override
public void configure(WebSecurity web) throws Exception {
// 忽略静态资源的访问，提高性能
web.ignoring().antMatchers("/resources/**");
}
// AuthenticationManager: 认证的核心接口.
// AuthenticationManagerBuilder: 用于构建AuthenticationManager对象的工具.
// ProviderManager: AuthenticationManager接口的默认实现类.
@Override
protected void configure(AuthenticationManagerBuilder auth) throws Exception {
// 内置的认证规则
// auth.userDetailsService(userService).passwordEncoder(new Pbkdf2PasswordEncoder("12345"));
// 自定义认证规则
// AuthenticationProvider: ProviderManager持有一组AuthenticationProvider,每个AuthenticationProvider负责一种认证.
// 委托模式: ProviderManager将认证委托给AuthenticationProvider.
auth.authenticationProvider(new AuthenticationProvider() {
// Authentication: 用于封装认证信息的接口,不同的实现类代表不同类型的认证信息.
// 此处Authentication代表封装账号密码的实现类
@Override
public Authentication authenticate(Authentication authentication) throws AuthenticationException {
// 获取账号
String username = authentication.getName();
// 获取密码
String password = (String) authentication.getCredentials();
User user = userService.findUserByName(username);
if (user == null) {
throw new UsernameNotFoundException("账号不存在!");
}
password = CommunityUtil.md5(password + user.getSalt());
if (!user.getPassword().equals(password)) {
throw new BadCredentialsException("密码不正确!");
}
// principal: 主要信息; credentials: 证书，通常为密码; authorities: 权限;
return new UsernamePasswordAuthenticationToken(user, user.getPassword(), user.getAuthorities());
}
// 当前的AuthenticationProvider支持哪种类型的认证.
@Override
public boolean supports(Class<?> aClass) {
// UsernamePasswordAuthenticationToken: Authentication接口的常用的实现类.
return UsernamePasswordAuthenticationToken.class.equals(aClass);
}
});
}
@Override
protected void configure(HttpSecurity http) throws Exception {
// 登录相关配置
http.formLogin()
.loginPage("/loginpage")
.loginProcessingUrl("/login")
.successHandler(new AuthenticationSuccessHandler() {
@Override
public void onAuthenticationSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
response.sendRedirect(request.getContextPath() + "/index");
}
})
.failureHandler(new AuthenticationFailureHandler() {
@Override
public void onAuthenticationFailure(HttpServletRequest request, HttpServletResponse response, AuthenticationException e) throws IOException, ServletException {
request.setAttribute("error", e.getMessage());
request.getRequestDispatcher("/loginpage").forward(request, response);
}
});
// 退出相关配置
http.logout()
.logoutUrl("/logout")
.logoutSuccessHandler(new LogoutSuccessHandler() {
@Override
public void onLogoutSuccess(HttpServletRequest request, HttpServletResponse response, Authentication authentication) throws IOException, ServletException {
response.sendRedirect(request.getContextPath() + "/index");
}
});
// 授权配置
http.authorizeRequests()
.antMatchers("/letter").hasAnyAuthority("USER", "ADMIN")
.antMatchers("/admin").hasAnyAuthority("ADMIN")
.and().exceptionHandling().accessDeniedPage("/denied");
// 增加Filter,处理验证码
http.addFilterBefore(new Filter() {
@Override
public void doFilter(ServletRequest servletRequest, ServletResponse servletResponse, FilterChain filterChain) throws IOException, ServletException {
HttpServletRequest request = (HttpServletRequest) servletRequest;
HttpServletResponse response = (HttpServletResponse) servletResponse;
if (request.getServletPath().equals("/login")) {
String verifyCode = request.getParameter("verifyCode");
if (verifyCode == null || !verifyCode.equalsIgnoreCase("1234")) {
request.setAttribute("error", "验证码错误!");
request.getRequestDispatcher("/loginpage").forward(request, response);
return;
}
}
// 让请求继续向下执行.
filterChain.doFilter(request, response);
}
}, UsernamePasswordAuthenticationFilter.class);
// 记住我
http.rememberMe()
.tokenRepository(new InMemoryTokenRepositoryImpl())
.tokenValiditySeconds(3600 * 24)
.userDetailsService(userService);
}
}