1.首先编写拦截器代码
package com.sarnath.interceptor;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.springframework.stereotype.Service;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import com.sarnath.constants.Constants;
import com.sarnath.controller.BaseController;
import com.sarnath.dto.output.UserOutput;
/**
* 自定义拦截器
* @Description
* @author Sunny
* @date 2018年1月15日
*/
@Service
public class CustomerInterceptor extends BaseController implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
String url = request.getRequestURI().substring(1,request.getRequestURI().length()-1);
/**登录和退出登录不做拦截*/
if(noLoginUrl.contains(url)){
return true;
}
//判断用户是否已登录
UserOutput user = getLoginUser(request, response);
if(user == null || user.getUserId() == null){
response.sendRedirect("/index");
return false;
}
//判断当前用户请求路径是否拥有对应权限
boolean allowRequesst = false;
if(user.getUserType() == Constants.USER_TYPE_ADMIN){
if(adminUrl.contains(url)){
allowRequesst = true;
}
}else if(user.getUserType() == Constants.USER_TYPE_TEACHER){
if(teacherUrl.contains(url)){
allowRequesst = true;
}
}else if(user.getUserType() == Constants.USER_TYPE_STUDENT){
if(studentUrl.contains(url)){
allowRequesst = true;
}
}
if(allowRequesst){
return allowRequesst;
}
//默认跳转到登录页面
response.sendRedirect("/index");
return false;
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
}
}
2.将拦截器增加到Spring Boot配置中
package com.sarnath.config;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.servlet.config.annotation.InterceptorRegistry;
import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter;
import com.sarnath.interceptor.CustomerInterceptor;
@Configuration
public class InterceptorConfig extends WebMvcConfigurerAdapter {
@Autowired
private CustomerInterceptor interceptor;
/**
* 添加拦截器到Spring Boot配置中
*/
@Override
public void addInterceptors(InterceptorRegistry registry) {
registry.addInterceptor(interceptor).addPathPatterns("/**");
}
}
Ok,只需要这两部,设置好方法或路径的拦截业务逻辑即可