javaweb添加拦截器
Posted 浪子丶沙
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js请求后台代码添加拦截器:
package com.ctzj.biz.isale.deploy.controller; import java.io.IOException; import java.io.UnsupportedEncodingException; import java.util.Date; import java.util.List; import java.util.Map; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.apache.curator.utils.ZKPaths; import org.springframework.beans.factory.annotation.Autowired; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.bind.annotation.ResponseBody; import org.springframework.web.bind.annotation.RestController; import org.springframework.web.context.request.RequestContextHolder; import org.springframework.web.context.request.ServletRequestAttributes; import org.springframework.web.servlet.config.annotation.InterceptorRegistry; import org.springframework.web.servlet.config.annotation.ResourceHandlerRegistry; import org.springframework.web.servlet.config.annotation.ViewControllerRegistry; import org.springframework.web.servlet.config.annotation.WebMvcConfigurerAdapter; import org.springframework.web.socket.WebSocketSession; import com.ctzj.biz.isale.deploy.config.ApplicationProperties; import com.ctzj.biz.isale.deploy.model.Menu; import com.ctzj.biz.isale.deploy.model.ResponseResult; import com.ctzj.biz.isale.deploy.model.dataobject.DeployConfigDo; import com.ctzj.biz.isale.deploy.model.query.DeployConfigQuery; import com.ctzj.biz.isale.deploy.service.DeployConfigService; import com.ctzj.biz.isale.deploy.service.MenuConfigService; import com.ctzj.biz.isale.deploy.util.Interceptor; import com.google.common.collect.Lists; import com.google.common.collect.Maps; @RestController @RequestMapping(value = "/dispatcher") public class DispatcherController extends WebMvcConfigurerAdapter{ @Autowired private DeployConfigService deployConfigService; @Autowired private MenuConfigService menuConfigService; @Autowired private ApplicationProperties properties; /** * 登录验证 * @param request * @param response * @return * @throws UnsupportedEncodingException */ @RequestMapping("/login") @ResponseBody public ResponseResult<String> login(HttpServletRequest request, HttpServletResponse response,String username,String password) throws UnsupportedEncodingException { HttpSession session = request.getSession(); if(properties.getPstUsername().equals(username)&&properties.getPstPassword().equals(password)){ session.setAttribute("user", username); }else if(properties.getProdUsername().equals(username)&&properties.getProdPassword().equals(password)){ session.setAttribute("user", username); }else if(properties.getSuperUsername().equals(username)&&properties.getSuperPassword().equals(password)){ session.setAttribute("user", username); }else{ username="用户名或密码错误!!!"; return ResponseResult.buildFailure(username); } return ResponseResult.buildSuccessInstance (username); } public void addInterceptors(InterceptorRegistry registry) { // 多个拦截器组成一个拦截器链 // addPathPatterns 用于添加拦截规则 // excludePathPatterns 用户排除拦截 registry.addInterceptor(new Interceptor()).addPathPatterns("/dispatcher/*").excludePathPatterns("/dispatcher/login"); super.addInterceptors(registry); } @Override public void addResourceHandlers(ResourceHandlerRegistry registry) { registry.addResourceHandler("/static/**").addResourceLocations("classpath:/static/"); super.addResourceHandlers(registry); } @Override public void addViewControllers(ViewControllerRegistry registry) { registry.addViewController("/toLogin").setViewName("login.html"); super.addViewControllers(registry); } }
只要继承
WebMvcConfigurerAdapter类后重写addInterceptors方法
再新建拦截器的类
package com.ctzj.biz.isale.deploy.util; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import javax.servlet.http.HttpSession; import org.slf4j.Logger; import org.slf4j.LoggerFactory; import org.springframework.web.servlet.HandlerInterceptor; import org.springframework.web.servlet.ModelAndView; import com.ctzj.biz.isale.deploy.websocket.LocalShellThread; /** * Created by 风流丶沙. * Date :2017/10/25 9:36 */ public class Interceptor implements HandlerInterceptor { private static final Logger LOG = LoggerFactory.getLogger(LocalShellThread.class); @Override public void afterCompletion(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, Exception arg3) throws Exception { // TODO Auto-generated method stub } @Override public void postHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2, ModelAndView arg3) throws Exception { // TODO Auto-generated method stub } @Override public boolean preHandle(HttpServletRequest arg0, HttpServletResponse arg1, Object arg2) throws Exception { LOG.info("method={}",arg0.getMethod()); String role = (String) arg0.getSession().getAttribute("user"); if(null==role||"".equals(role)){ arg1.sendRedirect("/login.html"); // arg0.getRequestDispatcher("/login.html").forward(arg0, arg1); return false; }else{ return true; } } }
preHandle这个方法再调用controller前调用,返回true继续执行下面代码,返回false不执行后面的代码!
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