创建一个类MyInterceptor继承Springmvc框架的接口（HandlerInterceptor）

配置SpringMVC的xml文件

<mvc:interceptors>

<mvc:interceptor>

<mvc:mapping path="/rollOversLoanRepayReport/rollmainpage.do"/>//需要拦截的控制器

<bean class="com.ydly.utils.interceptor.MyInterceptor"></bean>

</mvc:interceptor>

</mvc:interceptors>

在MyInterceptor中

@Override

public void afterCompletion(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex)

throws Exception {

System.out.println("afterCompletion");

logger.error(getTrace(ex));

}

public static String getTrace(Throwable t) {

StringWriter stringWriter= new StringWriter();

PrintWriter writer= new PrintWriter(stringWriter);

t.printStackTrace(writer);

StringBuffer buffer= stringWriter.getBuffer();

return buffer.toString();

}