今天带来Springmvc异常处理器及拦截器实现代码教程详解
一、异常处理器
1、实现HandlerExceptionResolver接口
package com.wuxi.exceptions;
import org.springframework.web.servlet.HandlerExceptionResolver;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class RequestExceptionResolver implements HandlerExceptionResolver {
@Override
public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
ModelAndView mv = new ModelAndView();
mv.addObject("errorMsg", e.getMessage());//错误信息
mv.setViewName("error");//请求转发的页面
return mv;
}
}
2、springmvc的xml配置文件
二、拦截器
1、实现HandlerInterceptor接口
package com.wuxi.interceptors;
import org.springframework.web.servlet.HandlerInterceptor;
import org.springframework.web.servlet.ModelAndView;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
public class ControllerInterceptor implements HandlerInterceptor {
@Override
public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
System.out.println("controller的方法执行之前执行");
return true;//true：放行；false：拦截
}
@Override
public void postHandle(HttpServletRequest request, HttpServletResponse response, Object handler, ModelAndView modelAndView) throws Exception {
System.out.println("controller的方法执行之后执行");
}
@Override
public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) throws Exception {
System.out.println("jsp执行之后执行");
}
}
2、springmvc的xml配置文件
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