springboot实现自定义的Interceptor拦截器

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构建springboot项目

这里使用的是eclipse,简单化 其他实体之类的代码省略

项目代码

application.properties

# 数据源配置
spring.datasource.username=root
spring.datasource.password=root
spring.datasource.url=jdbc:mysql://localhost:3306/cloud?allowMultiQueries=true&useUnicode=true&characterEncoding=UTF-8
spring.datasource.driver-class-name=com.mysql.jdbc.Driver

pom.xml

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>mysql</groupId>
            <artifactId>mysql-connector-java</artifactId>
            <scope>runtime</scope>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        <!-- 数据库连接池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.9</version>
        </dependency>
    </dependencies>

自定义的Interceptor

/**
 * 自定拦截器实现HandlerInterceptor接口
 * 重写这几个方法，在preHandle方法中加入自己的
 * 逻辑代码
 * @author lx
 *
 */
public class LoginInterceptor implements HandlerInterceptor{

    @Override
    public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)
            throws Exception {
        // TODO Auto-generated method stub
        HandlerInterceptor.super.afterCompletion(request, response, handler, ex);
    }

    @Override
    public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
            ModelAndView modelAndView) throws Exception {
        // TODO Auto-generated method stub
        HandlerInterceptor.super.postHandle(request, response, handler, modelAndView);
    }

    @Override
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler)
            throws Exception {
        // TODO Auto-generated method stub
        if(request.getSession().getAttribute("loginUser")!=null) {
            return true;
        }
        response.sendRedirect("/user/login");
        return false;
    }


}

加入到springboot配置中

import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;

/**
 * 继承于WebMvcConfigurerAdapter 重写它的addInterceptors方法
 * 将自定义的Interceptor加入
 * @author lx
 *
 */
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter{

    @Override
    public void addInterceptors(InterceptorRegistry registry) {
        // TODO Auto-generated method stub
        registry.addInterceptor(new LoginInterceptor()).addPathPatterns("/*");
    }


}

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