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| | | package com.yeshi.fanli.interceptor;
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| | | import java.io.PrintWriter;
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| | | import javax.servlet.http.Cookie;
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| | | import javax.servlet.http.HttpServletRequest;
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| | | import javax.servlet.http.HttpServletResponse;
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| | | import net.sf.json.JSONObject;
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| | | import org.springframework.web.servlet.ModelAndView;
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| | | import org.springframework.web.servlet.handler.HandlerInterceptorAdapter;
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| | | public class CommonInterceptor extends HandlerInterceptorAdapter {
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| | | /**
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| | | * 在业务处理器处理请求之前被调用 如果返回false 从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链
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| | | * |
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| | | * 如果返回true 执行下一个拦截器,直到所有的拦截器都执行完毕 再执行被拦截的Controller 然后进入拦截器链, 从最后一个拦截器往回执行所有的postHandle()
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| | | * 接着再从最后一个拦截器往回执行所有的afterCompletion()
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| | | */
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| | | @Override
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| | | public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) |
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| | | throws Exception {
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| | | String id = request.getSession().getId();
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| | | System.out.println("------start:" + id);
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| | | String origin = request.getHeader("Origin");
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| | | response.setHeader("Access-Control-Allow-Origin", origin);
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| | | response.setHeader("Access-Control-Allow-Methods", "*");
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| | | response.setHeader("Access-Control-Allow-Credentials","true");
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| | | response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept");
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| | | String method = request.getMethod();
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| | | System.out.println("-----method--------" + method);
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| | | if ("OPTIONS".equalsIgnoreCase(method)) {
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| | | System.out.println("------OPTIONS:");
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| | | JSONObject object = new JSONObject();
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| | | object.put("code", 200);
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| | | object.put("msg", "OPTIONS成功");
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| | | PrintWriter writer = response.getWriter();
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| | | writer.print(object);
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| | | return false;
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| | | }
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| | | |
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| | | return true;
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| | | }
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| | | /**
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| | | * 在业务处理器处理请求执行完成后,生成视图之前执行的动作 可在modelAndView中加入数据，比如当前时间
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| | | */
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| | | @Override
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| | | public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler,
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| | | ModelAndView modelAndView) throws Exception {
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| | | }
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| | |
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| | | /**
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| | | * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion()
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| | | */
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| | | @Override
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| | | public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, |
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| | | Exception ex)
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| | | throws Exception {
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| | | }
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| | | }
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| | | package com.yeshi.fanli.interceptor; |
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| | | |
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| | | import java.io.PrintWriter; |
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| | | import java.util.Collection; |
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| | | |
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| | | import javax.servlet.http.HttpServletRequest; |
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| | | import javax.servlet.http.HttpServletResponse; |
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| | | |
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| | | import net.sf.json.JSONObject; |
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| | | |
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| | | import org.springframework.http.HttpHeaders; |
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| | | import org.springframework.web.servlet.ModelAndView; |
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| | | import org.springframework.web.servlet.handler.HandlerInterceptorAdapter; |
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| | | |
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| | | public class CommonInterceptor extends HandlerInterceptorAdapter { |
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| | | |
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| | | |
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| | | /** |
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| | | * 在业务处理器处理请求之前被调用 如果返回false 从当前的拦截器往回执行所有拦截器的afterCompletion(),再退出拦截器链 |
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| | | * |
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| | | * 如果返回true 执行下一个拦截器,直到所有的拦截器都执行完毕 再执行被拦截的Controller 然后进入拦截器链, 从最后一个拦截器往回执行所有的postHandle() |
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| | | * 接着再从最后一个拦截器往回执行所有的afterCompletion() |
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| | | */ |
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| | | @Override |
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| | | public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) |
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| | | throws Exception { |
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| | | |
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| | | String origin = request.getHeader("Origin"); |
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| | | response.setHeader("Access-Control-Allow-Origin", origin); |
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| | | response.setHeader("Access-Control-Allow-Methods", "*"); // 任何方法 |
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| | | response.setHeader("Access-Control-Allow-Credentials","true");// 允许传递cookie |
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| | | response.setHeader("Access-Control-Allow-Headers", "Origin, X-Requested-With, Content-Type, Accept"); |
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| | | |
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| | | String method = request.getMethod(); |
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| | | if ("OPTIONS".equalsIgnoreCase(method)) { |
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| | | JSONObject object = new JSONObject(); |
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| | | object.put("code", 200); |
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| | | object.put("msg", "OPTIONS连接成功"); |
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| | | PrintWriter writer = response.getWriter(); |
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| | | writer.print(object); |
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| | | return false; |
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| | | } |
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| | | |
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| | | return true; |
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| | | |
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| | | } |
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| | | |
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| | | /** |
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| | | * 在业务处理器处理请求执行完成后,生成视图之前执行的动作 可在modelAndView中加入数据，比如当前时间 |
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| | | */ |
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| | | @Override |
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| | | public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, |
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| | | ModelAndView modelAndView) throws Exception { |
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| | | } |
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| | | |
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| | | /** |
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| | | * 在DispatcherServlet完全处理完请求后被调用,可用于清理资源等 当有拦截器抛出异常时,会从当前拦截器往回执行所有的拦截器的afterCompletion() |
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| | | */ |
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| | | @Override |
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| | | public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, |
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| | | Exception ex) throws Exception { |
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| | | } |
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| | | } |
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