SpringBoot攔截器和視圖控制器

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);
	}
}

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