安全漏洞防护完全指南前言本文介绍常见的安全漏洞及其防护措施确保系统安全。一、常见漏洞防护1.1 SQL注入防护Service RequiredArgsConstructor public class UserRepository { private final JdbcTemplate jdbcTemplate; // 使用参数化查询防止SQL注入 public User findByUsername(String username) { String sql SELECT * FROM users WHERE username ?; return jdbcTemplate.queryForObject(sql, new Object[]{username}, new UserRowMapper()); } }1.2 XSS防护Component public class XssFilter implements Filter { Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletRequest httpRequest (HttpServletRequest) request; chain.doFilter(new XssHttpServletRequestWrapper(httpRequest), response); } } public class XssHttpServletRequestWrapper extends HttpServletRequestWrapper { Override public String getParameter(String name) { String value super.getParameter(name); return xssEncode(value); } private String xssEncode(String value) { if (value null) return null; return value.replaceAll(, lt;) .replaceAll(, gt;) .replaceAll(\, quot;) .replaceAll(, #x27;) .replaceAll(/, #x2F;); } }1.3 CSRF防护Configuration EnableWebSecurity public class CsrfSecurityConfig { Bean public SecurityFilterChain filterChain(HttpSecurity http) throws Exception { http .csrf(csrf - csrf .csrfTokenRepository(CookieCsrfTokenRepository.withHttpOnlyFalse()) .ignoringRequestMatchers(/api/public/**) ); return http.build(); } }二、安全响应头Component public class SecurityHeadersFilter implements Filter { Override public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) throws IOException, ServletException { HttpServletResponse httpResponse (HttpServletResponse) response; httpResponse.setHeader(X-Content-Type-Options, nosniff); httpResponse.setHeader(X-Frame-Options, DENY); httpResponse.setHeader(X-XSS-Protection, 1; modeblock); httpResponse.setHeader(Strict-Transport-Security, max-age31536000; includeSubDomains); httpResponse.setHeader(Content-Security-Policy, default-src self; script-src self unsafe-inline); httpResponse.setHeader(Referrer-Policy, strict-origin-when-cross-origin); chain.doFilter(request, response); } }三、总结通过多种防护措施组合可以有效防止常见的安全漏洞保障系统安全。
