具体代码如下：
import java.lang.annotation.Documented;
import java.lang.annotation.ElementType;
import java.lang.annotation.Retention;
import java.lang.annotation.RetentionPolicy;
import java.lang.annotation.Target;
/**
* 标注此注解的controller不需要登陆
* @author 尘世间迷茫的小书童
*
*/
@Documented //该注解表示 是否被JavaDoc处理并保留在文档中
@Target({ElementType.METHOD, ElementType.TYPE}) //注解使用的地方
@Retention(RetentionPolicy.RUNTIME) //源码保留级别
public @interface NoLogin {
}
CheckLoginInterceptor:
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.log4j.Logger;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class CheckLoginInterceptor implements HandlerInterceptor {
private static final Logger logger = Logger.getLogger(CheckLoginInterceptor.class);
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
throws Exception {
// TODO Auto-generated method stub
if(!(handler instanceof HandlerMethod)) {
logger.warn("当前操作handler不为HandlerMethod=" + handler.getClass().getName() + ",req=" + request.getQueryString());
return true;
}
HandlerMethod handlerMethod = (HandlerMethod) handler;
String methodName = handlerMethod.getMethod().getName();
NoLogin noLogin = handlerMethod.getMethod().getAnnotation(NoLogin.class);
if(null != noLogin) {
logger.info("当前访问methodName=" + methodName + "不需要登陆");
System.out.println("当前访问methodName=" + methodName + "不需要登陆");
return true;
}
noLogin = handlerMethod.getMethod().getDeclaringClass().getAnnotation(NoLogin.class);
if(null != noLogin) {
logger.info("当前访问methodName= " + methodName + " 不需要登陆");
System.out.println("当前访问methodName= " + methodName + " 不需要登陆");
return true;
}
//验证请求中是否包含session
if(null == request.getSession()) {
logger.info("当前访问 methodName=" + methodName + "用户未登录，IP= " + request.getRemoteAddr());
System.out.println("当前访问 methodName=" + methodName + "用户未登录，IP= " + request.getRemoteAddr());
return false;
}
logger.info("当前访问methodName=" + methodName + "需要登陆");
System.out.println("当前访问methodName=" + methodName + "需要登陆");
return false;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
ModelAndView modelAndView) throws Exception {
// TODO Auto-generated method stub
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
throws Exception {
// TODO Auto-generated method stub
}
}
InterceptorConfig:
import java.util.List; import org.springframework.context.annotation.Configuration; import org.springframework.format.FormatterRegistry; import org.springframework.http.converter.HttpMessageConverter; import org.springframework.validation.MessageCodesResolver; import org.springframework.validation.Validator; import org.springframework.web.method.support.HandlerMethodArgumentResolver; import org.springframework.web.method.support.HandlerMethodReturnValueHandler; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.config.annotation.AsyncSupportConfigurer; import org.springframework.web.servlet.config.annotation.ContentNegotiationConfigurer; import org.springframework.web.servlet.config.annotation.CorsRegistry; import org.springframework.web.servlet.config.annotation.DefaultServletHandlerConfigurer; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.PathMatchConfigurer; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; import org.springframework.web.servlet.config.annotation.ViewResolverRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurer;
//也可以继承WebMvcConfigurerAdapter类只重写addInterceptors方法，下面代码比较啰嗦 @Configuration public class InterceptorConfig implements WebMvcConfigurer { @Override public void configurePathMatch(PathMatchConfigurer configurer) { // TODO Auto-generated method stub } @Override public void configureContentNegotiation(ContentNegotiationConfigurer configurer) { // TODO Auto-generated method stub } @Override public void configureAsyncSupport(AsyncSupportConfigurer configurer) { // TODO Auto-generated method stub } @Override public void configureDefaultServletHandling(DefaultServletHandlerConfigurer configurer) { // TODO Auto-generated method stub } @Override public void addFormatters(FormatterRegistry registry) { // TODO Auto-generated method stub } @Override public void addInterceptors(InterceptorRegistry registry) { registry.addInterceptor(new CheckLoginInterceptor()).addPathPatterns("/**"); } @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { // TODO Auto-generated method stub } @Override public void addCorsMappings(CorsRegistry registry) { // TODO Auto-generated method stub } @Override public void addViewControllers(ViewControllerRegistry registry) { // TODO Auto-generated method stub } @Override public void configureViewResolvers(ViewResolverRegistry registry) { // TODO Auto-generated method stub } @Override public void addArgumentResolvers(List<HandlerMethodArgumentResolver> argumentResolvers) { // TODO Auto-generated method stub } @Override public void addReturnValueHandlers(List<HandlerMethodReturnValueHandler> returnValueHandlers) { // TODO Auto-generated method stub } @Override public void configureMessageConverters(List<HttpMessageConverter<?>> converters) { // TODO Auto-generated method stub } @Override public void extendMessageConverters(List<HttpMessageConverter<?>> converters) { // TODO Auto-generated method stub } @Override public void configureHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) { // TODO Auto-generated method stub } @Override public void extendHandlerExceptionResolvers(List<HandlerExceptionResolver> exceptionResolvers) { // TODO Auto-generated method stub } @Override public Validator getValidator() { // TODO Auto-generated method stub return null; } @Override public MessageCodesResolver getMessageCodesResolver() { // TODO Auto-generated method stub return null; } }
TestController:
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.ResponseBody;
@Controller
public class TestController {
@NoLogin
@GetMapping("/user/login.htm")
@ResponseBody
public void login(String username, String password) {
}
@ResponseBody
@GetMapping("/user/userInfo.htm")
public void getUserInfo(Long userId) {
}
@NoLogin
@ResponseBody
@GetMapping("/user/register.htm")
public void register(String username, String password) {
}
}
运行效果:
2019-06-29 00:17:41.222 INFO 11388 --- [nio-8001-exec-1] www.mxh.com.CheckLoginInterceptor : 当前访问methodName=getUserInfo需要登陆 当前访问methodName=getUserInfo需要登陆 2019-06-29 00:17:57.987 INFO 11388 --- [nio-8001-exec-4] www.mxh.com.CheckLoginInterceptor : 当前访问methodName=login不需要登陆 当前访问methodName=login不需要登陆 2019-06-29 00:27:37.214 INFO 11388 --- [nio-8001-exec-9] www.mxh.com.CheckLoginInterceptor : 当前访问methodName=register不需要登陆 当前访问methodName=register不需要登陆