構建springboot專案

這裡使用的是eclipse,簡單化 其他實體之類的程式碼省略

專案程式碼

application.properties

# 資料來源配置
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>
        <!-- 資料庫連線池 -->
        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>druid</artifactId>
            <version>1.1.9</version>
        </dependency>
    </dependencies>

自定義的Interceptor

/**
 * 自定攔截器實現HandlerInterceptor介面
 * 重寫這幾個方法，在preHandle方法中加入自己的
 * 邏輯程式碼
 * @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;

/**
 * 繼承於WebMvcConfigurerAdapter 重寫它的addInterceptors方法
 * 將自定義的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("/*");
    }


}