创建控制器类
package com.byzore.controller; import com.byzore.exception.AgeException; import com.byzore.exception.NameException; import org.springframework.stereotype.Controller; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.bind.annotation.RequestMapping; import org.springframework.web.servlet.ModelAndView; /** * 控制器 */ @Controller @RequestMapping("/first") public class FirstController { @RequestMapping("/firstRequest") public String firstRequest(){ //模拟异常 int result=5/0; return "index"; } @RequestMapping("/secondRequest") public String secondRequest(String userName,Integer userAge) throws NameException, AgeException { if (!userName.equals("admin")){ //手动创建一个Name异常 throw new NameException("名称错误！！！"); } if (userAge>80){ //手动创建一个Age异常 throw new AgeException("年龄太大，不符合要求"); } return "index"; } }
一、系统异常处理
1、配置applicationContext.xml文件
<!--系统异常处理-->
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="defaultErrorView" value="error"/>
<property name="exceptionAttribute" value="ex"/>
</bean>
2、创建NameException异常类
package com.byzore.exception; public class NameException extends Exception{ public NameException() { } public NameException(String message) { super(message); } }
3、创建AgeException异常类
package com.byzore.exception; /** * 一个类变为异常类 */ public class AgeException extends Exception{ public AgeException() { } public AgeException(String message) { super(message); } }
4、创建主页面index
<%@ page contentType="text/html; charset=UTF-8" language="java" isELIgnored="false" %> <html> <body> <h2>Hello World!</h2> </body> </html>
5、创建登录页面login
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>登录页面</title> </head> <body> <form action="/conter/conteRequest" method="post"> 姓名：<input type="text" name="userName"> 年龄：<input type="text" name="userAge"> <input type="submit" value="提交"> </form> </body> </html>
6、创建ageError.jsp页面
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>错误页面</title> </head> <body> ${ex.message} 年龄不符合要求 </body> </html>
7、创建nameError.jsp页面
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %> <html> <head> <title>错误页面</title> </head> <body> ${ex.message} 用户名错误！！ </body> </html>
二、局部异常处理
1、控制器类
/** * 控制器 */ @Controller @RequestMapping("/first") public class FirstController { /** * 局部注解处理 */ @ExceptionHandler public ModelAndView exceptionHandler(Exception ex){ ModelAndView mv=new ModelAndView(); //如果发生异常，我们就给他一个默认的异常处理页面 mv.setViewName("error"); mv.addObject("ex",ex); //如果发生Name异常，则跳转到Nam异常页面 if (ex instanceof NameException){ mv.setViewName("nameError"); } if (ex instanceof AgeException){ mv.setViewName("ageError"); } return mv; } }
三、自定义异常处理器
1、定义自定义异常类
package com.byzore.exception; import org.springframework.web.servlet.HandlerExceptionResolver; import org.springframework.web.servlet.ModelAndView; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; /** * 自定义异常处理器 */ public class MyHandlerException implements HandlerExceptionResolver { @Override public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception ex) { ModelAndView mv=new ModelAndView(); //如果发生异常，我们就给他一个默认的异常处理页面 mv.setViewName("error"); mv.addObject("ex",ex); //如果发生Name异常，则跳转到Nam异常页面 if (ex instanceof NameException){ mv.setViewName("nameError"); } if (ex instanceof AgeException){ mv.setViewName("ageError"); } return mv; } }
2、配置applicationContext.xml文件
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--将Controller注入到容器当中 id就是浏览器请求地址--> <!--<bean id="/firstController" class="com.springmvc.controller.FirstController"></bean>--> <!--配置包扫描器--> <context:component-scan base-package="com.byzore"/> <!--Spring支持SpringMVC--> <mvc:annotation-driven/> <!--配置视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"/> <property name="suffix" value=".jsp"/> </bean> <!--利用DefaultServlet放行资源--> <mvc:default-servlet-handler/> <!--从Spring3.0.4版本提供资源放行的方式--> <!--<mvc:resources mapping="/**" location="/img"/>--> <!--系统异常处理--> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="defaultErrorView" value="error"/> <property name="exceptionAttribute" value="ex"/> <!--定制异常--> <property name="exceptionMappings"> <props> <prop key="com.byzore.exception.NameException">nameError</prop> <prop key="com.byzore.exception.AgeException">ageError</prop> </props> </property> </bean> </beans>
四、全局异常处理
1、创建全局异常处理类
package com.byzore.exception; import org.springframework.web.bind.annotation.ControllerAdvice; import org.springframework.web.bind.annotation.ExceptionHandler; import org.springframework.web.servlet.ModelAndView; /** * 处理所有的异常类 */ @ControllerAdvice public class MyControllerAdvice { @ExceptionHandler public ModelAndView exceptionHandler(Exception ex){ ModelAndView mv=new ModelAndView(); //如果发生异常，我们就给他一个默认的异常处理页面 mv.setViewName("error"); mv.addObject("ex",ex); //如果发生Name异常，则跳转到Nam异常页面 if (ex instanceof NameException){ mv.setViewName("nameError"); } if (ex instanceof AgeException){ mv.setViewName("ageError"); } return mv; } }
2、配置applicationContext.xml文件
<?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:aop="http://www.springframework.org/schema/aop" xmlns:context="http://www.springframework.org/schema/context" xmlns:mvc="http://www.springframework.org/schema/mvc" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc.xsd"> <!--将Controller注入到容器当中 id就是浏览器请求地址--> <!--<bean id="/firstController" class="com.springmvc.controller.FirstController"></bean>--> <!--配置包扫描器--> <context:component-scan base-package="com.byzore"/> <!--Spring支持SpringMVC--> <mvc:annotation-driven/> <!--配置视图解析器--> <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> <property name="prefix" value="/"/> <property name="suffix" value=".jsp"/> </bean> <!--利用DefaultServlet放行资源--> <mvc:default-servlet-handler/> <!--从Spring3.0.4版本提供资源放行的方式--> <!--<mvc:resources mapping="/**" location="/img"/>--> <!--系统异常处理--> <bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver"> <property name="defaultErrorView" value="error"/> <property name="exceptionAttribute" value="ex"/> </bean> <!--注入自定义异常处理器--> <bean class="com.byzore.exception.MyHandlerException"></bean> </beans>
