SpringBoot攔截器
1、定義攔截器(與SpringMVC的定義方式一致)
package com.mingde.interceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
public class MyInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest req, HttpServletResponse resp, Object arg2) throws Exception {
System.out.println("MyInterceptor01--->preHandle()執行控制器之前調用此方法....");
//返回true則放行,返回false則將其攔截住
return true;
}
@Override
public void postHandle(HttpServletRequest req, HttpServletResponse resp, Object arg2, ModelAndView arg3)
throws Exception {
System.out.println("MyInterceptor01--->postHandle()執行控制器之後且在渲染視圖前調用此方法....");
}
@Override
public void afterCompletion(HttpServletRequest req, HttpServletResponse resp, Object arg2, Exception arg3)
throws Exception {
System.out.println("MyInterceptor01--->afterCompletion()執行控制器之後且在完成渲染視圖後調用此方法....");
}
}
2、註冊攔截器
package com.mingde.configurer;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.mingde.interceptor.MyInterceptor;
@Configuration
public class MyWebAppConfigurer extends WebMvcConfigurerAdapter {
//重寫添加攔截器的方法(添加調用的攔截器,並指定攔截的目標)
@Override
public void addInterceptors(InterceptorRegistry registry) { //註冊攔截器
//代表指定攔截所有路徑的資源.並且排除掉xxx(不攔截xxx)
//registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**").excludePathPatterns("xxx");
//addPathPatterns("/**")代表指定攔截所有路徑的資源
registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
super.addInterceptors(registry);
}
}
SpringBoot添加視圖控制器
在上面的類中補習addview方法即可
package com.mingde.configurer;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.ViewControllerRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.mingde.interceptor.MyInterceptor;
@Configuration
public class MyWebAppConfigurer extends WebMvcConfigurerAdapter {
//重寫添加攔截器的方法(添加調用的攔截器,並指定攔截的目標)
@Override
public void addInterceptors(InterceptorRegistry registry) { //註冊攔截器
//代表指定攔截所有路徑的資源.並且排除掉xxx(不攔截xxx)
//registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**").excludePathPatterns("xxx");
//addPathPatterns("/**")代表指定攔截所有路徑的資源
registry.addInterceptor(new MyInterceptor()).addPathPatterns("/**");
super.addInterceptors(registry);
}
//加載靜態資源
/*@Override
public void addResourceHandlers(ResourceHandlerRegistry registry) {
// TODO Auto-generated method stub
super.addResourceHandlers(registry);
}*/
//重寫添加視圖控制器(不用寫controller就可以跳轉至指定的jsp,比如:http://localhost:90/tologin)
//此時就跳轉到/WEB-INF/jsp/list.jsp頁面
@Override
public void addViewControllers(ViewControllerRegistry registry) {
registry.addViewController("tologin").setViewName("list");
super.addViewControllers(registry);
}
}