Spring boot之SpringApplicationBuilder,@@Configuration注解,@Component注解
Posted 谁将新樽辞旧月,今月曾经照古人
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SpringApplicationBuilder:
该方法的作用是可以把项目打包成war包
需要配置启动类,pom.xml文件等,具体见:http://blog.csdn.net/linzhiqiang0316/article/details/52601292
@SpringBootApplication public class FavoritesApplication extends SpringBootServletInitializer{ /** * 如此配置打包后可以用tomcat下使用 * @param application * @return */ @Override protected SpringApplicationBuilder configure(SpringApplicationBuilder application) { return application.sources(FavoritesApplication.class); } public static void main(String[] args) { SpringApplication.run(FavoritesApplication.class, args); } }
@Configuration注解:
从Spring3.0,@Configuration用于定义配置类,可替换xml配置文件,被注解的类内部包含有一个或多个被@Bean注解的方法,这些方法将会被AnnotationConfigApplicationContext或AnnotationConfigWebApplicationContext类进行扫描,并用于构建bean定义,初始化Spring容器。
@Configuration public class WebConfiguration { @Bean public FilterRegistrationBean filterRegistration() { FilterRegistrationBean registration = new FilterRegistrationBean(); registration.setFilter(new SecurityFilter()); registration.addUrlPatterns("/*"); registration.addInitParameter("paramName", "paramValue"); registration.setName("MyFilter"); registration.setOrder(1); return registration; } }
public class SecurityFilter implements Filter { protected Logger logger = Logger.getLogger(this.getClass()); private static Set<String> GreenUrlSet = new HashSet<String>(); @Autowired private UserRepository userRepository; @Override public void init(FilterConfig arg0) throws ServletException { // TODO Auto-generated method stub GreenUrlSet.add("/login"); GreenUrlSet.add("/register"); GreenUrlSet.add("/index"); GreenUrlSet.add("/forgotPassword"); GreenUrlSet.add("/newPassword"); GreenUrlSet.add("/tool"); } @Override public void doFilter(ServletRequest srequest, ServletResponse sresponse, FilterChain filterChain) throws IOException, ServletException { // TODO Auto-generated method stub HttpServletRequest request = (HttpServletRequest) srequest; String uri = request.getRequestURI(); if (request.getSession().getAttribute(Const.LOGIN_SESSION_KEY) == null) { Cookie[] cookies = request.getCookies(); if (containsSuffix(uri) || GreenUrlSet.contains(uri) || containsKey(uri)) { logger.debug("don‘t check url , " + request.getRequestURI()); filterChain.doFilter(srequest, sresponse); return; }else if (cookies!=null) { boolean flag = true; for (int i = 0; i < cookies.length; i++) { Cookie cookie = cookies[i]; if (cookie.getName().equals(Const.LOGIN_SESSION_KEY)) { if(StringUtils.isNotBlank(cookie.getValue())){ flag = false; }else{ break; } String value = getUserId(cookie.getValue()); Long userId = 0l; if (userRepository == null) { BeanFactory factory = WebApplicationContextUtils.getRequiredWebApplicationContext(request.getServletContext()); userRepository = (UserRepository) factory.getBean("userRepository"); } if(StringUtils.isNotBlank(value)){ userId = Long.parseLong(value); } User user = userRepository.findOne(userId); String html = ""; if(null == user){ html = "<script type=\"text/javascript\">window.location.href=\"_BP_login\"</script>"; }else{ logger.info("userId :" + user.getId()); request.getSession().setAttribute(Const.LOGIN_SESSION_KEY, user); String referer = this.getRef(request); if(referer.indexOf("/collect?") >= 0 || referer.indexOf("/lookAround/standard/") >= 0 || referer.indexOf("/lookAround/simple/") >= 0){ filterChain.doFilter(srequest, sresponse); return; }else{ html = "<script type=\"text/javascript\">window.location.href=\"_BP_\"</script>"; } } html = html.replace("_BP_", Const.BASE_PATH); sresponse.getWriter().write(html); /** * HttpServletResponse response = (HttpServletResponse) sresponse; response.sendRedirect("/"); */ } } if(flag){ //跳转到登陆页面 String referer = this.getRef(request); logger.debug("security filter, deney, " + request.getRequestURI()); String html = ""; if(referer.contains("/collect?") || referer.contains("/lookAround/standard/") || referer.contains("/lookAround/simple/")){ html = "<script type=\"text/javascript\">window.location.href=\"_BP_login\"</script>"; }else{ html = "<script type=\"text/javascript\">window.location.href=\"_BP_index\"</script>"; } html = html.replace("_BP_", Const.BASE_PATH); sresponse.getWriter().write(html); } }else{ //跳转到登陆页面 String referer = this.getRef(request); logger.debug("security filter, deney, " + request.getRequestURI()); String html = ""; if(referer.contains("/collect?") || referer.contains("/lookAround/standard/") || referer.contains("/lookAround/simple/")){ html = "<script type=\"text/javascript\">window.location.href=\"_BP_login\"</script>"; }else{ html = "<script type=\"text/javascript\">window.location.href=\"_BP_index\"</script>"; } html = html.replace("_BP_", Const.BASE_PATH); sresponse.getWriter().write(html); // HttpServletResponse response = (HttpServletResponse) sresponse; //response.sendRedirect("/"); } }else{ filterChain.doFilter(srequest, sresponse); } } /** * @param url * @return * @author neo * @date 2016-5-4 */ private boolean containsSuffix(String url) { if (url.endsWith(".js") || url.endsWith(".css") || url.endsWith(".jpg") || url.endsWith(".gif") || url.endsWith(".png") || url.endsWith(".html") || url.endsWith(".eot") || url.endsWith(".svg") || url.endsWith(".ttf") || url.endsWith(".woff") || url.endsWith(".ico") || url.endsWith(".woff2")) { return true; } else { return false; } } /** * @param url * @return * @author neo * @date 2016-5-4 */ private boolean containsKey(String url) { if (url.contains("/media/") || url.contains("/login")||url.contains("/user/login") || url.contains("/register")||url.contains("/user/regist")||url.contains("/index") || url.contains("/forgotPassword")||url.contains("/user/sendForgotPasswordEmail") || url.contains("/newPassword")||url.contains("/user/setNewPassword") || (url.contains("/collector") && !url.contains("/collect/detail/")) || url.contains("/collect/standard/")||url.contains("/collect/simple/") || url.contains("/user")||url.contains("/favorites")||url.contains("/comment") || url.startsWith("/lookAround/standard/") || url.startsWith("/lookAround/simple/") || url.startsWith("/user/") || url.startsWith("/feedback") || url.startsWith("/standard/") || url.startsWith("/collect/standard/lookAround/") || url.startsWith("/collect/simple/lookAround/")) { return true; } else { return false; } } @Override public void destroy() { // TODO Auto-generated method stub } public String codeToString(String str) { String strString = str; try { byte tempB[] = strString.getBytes("ISO-8859-1"); strString = new String(tempB); return strString; } catch (Exception e) { return strString; } } public String getRef(HttpServletRequest request){ String referer = ""; String param = this.codeToString(request.getQueryString()); if(StringUtils.isNotBlank(request.getContextPath())){ referer = referer + request.getContextPath(); } if(StringUtils.isNotBlank(request.getServletPath())){ referer = referer + request.getServletPath(); } if(StringUtils.isNotBlank(param)){ referer = referer + "?" + param; } request.getSession().setAttribute(Const.LAST_REFERER, referer); return referer; } public String getUserId(String value){ try { String userId = Des3EncryptionUtil.decode(Const.DES3_KEY,value); userId = userId.substring(0,userId.indexOf(Const.PASSWORD_KEY)); return userId; }catch (Exception e){ logger.error("解析cookie异常:",e); } return null; } }
@Component:
关于Spring的@Component、@Repository、@Service、@Controller四个注解的区别,查阅了spring的官方文档:http://spring.io/search,文档中只是说了组件的注解要在组件处,service的注解要用在service处,但是他们的定义却没有区别。
问题:
1.那既然没有区别,为什么要分开来定义四个注解呢?
2.既然如他定义中说的,使用具体场景如下:
@Repository注解:用于标注数据访问组件,即DAO组件
@Service注解:用于标注业务层组件
@Controller注解:用于标注控制层组件(如struts中的action)
@Component注解:泛指组件,当组件不好归类的时候,我们可以使用这个注解进行标注。
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