SSM-SPRINGMVC-24:SPRINGMVC Exception Advanced Custom exception

------------I do not have him, but the hand is ripe, humble and foolish, and eager to be hungry-------------

Custom exception, everyone, yes, nothing is inherited exception class operations, very simple, I do not much, but in the XML configuration file has a different operation, I will focus on the list to

Case Start:

1. Custom Exception class: Userageexception

Package cn.dawn.day17selfexceptionresolver.userexception; /*  */Publicclass  userageexception extends Exception    {public  userageexception () {        super ();    }      Public userageexception (String message) {        super (message);}    }

2. Custom Exception class: Usernameexception

Package cn.dawn.day17selfexceptionresolver.userexception; /*  */Publicclass  usernameexception extends Exception    {public  usernameexception () {        super ();    }      Public usernameexception (String message) {        super (message);}    }

3. Define the processor and processing method:

Package Cn.dawn.day17selfexceptionresolver;import Cn.dawn.day17selfexceptionresolver.userexception.userageexception;import Cn.dawn.day17selfexceptionresolver.userexception.usernameexception;import Org.springframework.stereotype.controller;import org.springframework.web.bind.annotation.RequestMapping;/** * Created by Dawn on 2018/3/28.*/@Controller Public classZdyexceptioncontroller {@RequestMapping ("/zidingyiexception")     Publicstring Zidingyiexception (String Username,integer userage) throws Exception {if(!username.equals ("Admin")){            Throw NewUsernameexception ("login name is incorrect"); }        if(userage< -){            Throw NewUserageexception ("underage, go away"); }        return "Success"; }}

In its own XML large configuration: Simplemappingexceptionresolver with a exceptionmappings

<?xml version="1.0"encoding="UTF-8"? ><beans xmlns="Http://www.springframework.org/schema/beans"Xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"Xmlns:mvc="Http://www.springframework.org/schema/mvc"Xmlns:context="Http://www.springframework.org/schema/context"xsi:schemalocation="Http://www.springframework.org/schema/beanshttp//www.springframework.org/schema/beans/spring-beans.xsdhttp//Www.springframework.org/schema/mvchttp//www.springframework.org/schema/mvc/spring-mvc.xsdhttp//Www.springframework.org/schema/contexthttp//www.springframework.org/schema/context/spring-context.xsd "><!--package Scanner--<context:component-scanBase-package="Cn.dawn.day16exceptionhigh"></context:component-scan> <!--View Resolver-<beanclass="Org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix"Value="/day16/"></property> <property name="suffix"Value=". JSP"></property> </bean> <beanclass="Org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <!--Default exception jumps page-<property name="Defaulterrorview"Value="Error"></property> <!--This can inject an exception object, just like the catch parameter (Exception ex)--<property name="Exceptionattribute"Value="ex"></property><!--Custom exceptions--<property name= "exceptionmappings" > <props> <prop key= "Cn.dawn.day16exceptionhigh.userexception.UserageException" >age</prop> <prop key= "cn.dawn.d Ay16exceptionhigh.userexception.UsernameException ">name</prop> </props> </property> </bean></beans>

Red is the top priority.

4. Change the central scheduler context configuration location for Web. XML to the new one above

5.jsp page

5.1age.jsp

<%@ page  pageencoding="UTF-8" contenttype="text/html;charset= UTF-8" language="java" iselignored="false "  %>server was cut by monkeys, siege lion in repair, also killed a program ape worship </body></ Html>

5.2name.jsp

<%@ page  pageencoding="UTF-8" contenttype="text/html;charset= UTF-8" language="java" iselignored="false "  %>server was cut by monkeys, siege lion in repair, also killed a program ape worship </body></ Html>

5.3login.jsp

<%@ page pageencoding="UTF-8"Contenttype="Text/html;charset=utf-8"Language="Java"Iselignored="false"%>"${pagecontext.request.contextpath}/zidingyiexception"Method="Post">User name:<input name="username">Age:<input name="Userage"> <input type="Submit"Value="Login"/></form></body>
5.4success.jsp
<%@ page language="java" pageencoding="utf-8" iselignored ="false" %>"image/1.jpg  ">--%>
5.5error.jsp
<%@ page  pageencoding="UTF-8" contenttype="text/html;charset= UTF-8" language="java" iselignored="false"   %>server was cut by monkeys, siege lion in repair, also killed a program ape worship </body></ Html>
6. Launch Tomcat Access login.jsp
 Ssm-springmvc-24:springmvc Exception Advanced Custom exception