Spring MVC异常处理的方式有以下几种
1.
<bean class="org.springframework.web.servlet.handler.SimpleMappingExceptionResolver">
<property name="defaultErrorView" value="error"/>
<property name="exceptionAttribute" value="ex"/>
@Controller
@RequestMapping("/first")
public class FirstController {
@RequestMapping("/firstRequest")
public String firstRequest(){
//模拟异常
int result=5/0;
return "index";
}
<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
<title>错误页面</title>
</head>
<body>
发生错误：${ex.message}
</body>
</html>
2.
<body>
<form action="/second/secondRequest" method="post">
姓名：<input type="text" name="userName"/>
年龄:<input type="text" name="userAge"/>
<input type="submit" value="提交"/>
</form>
</body>
<!--系统异常处理器-->
<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.springmvc.exception.NameException">nameError</prop>
<prop key="com.springmvc.exception.AgeException">ageError</prop>
</props>
</property>
</bean>
@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，不符合规定！！！！！！");
}
return "index";
}
public class NameException extends Exception{
public NameException() {
}
public NameException(String message) {
super(message);
}
}
public class AgeException extends Exception{
public AgeException() {
}
public AgeException(String message) {
super(message);
}
}
3.
/**
* 自定义异常处理器
*/
public class MyHandlerException implements HandlerExceptionResolver {
@Override
public ModelAndView resolveException(HttpServletRequest request, HttpServletResponse response, Object handler, Exception ex) {
ModelAndView modelAndView=new ModelAndView();
//如果发生异常，我们给他一个默认的异常处理页面
modelAndView.setViewName("error");
modelAndView.addObject("ex",ex);
//如果发生Name异常，则跳转到Name异常页面
if(ex instanceof NameException){
modelAndView.setViewName("nameError");
}
if(ex instanceof AgeException){
modelAndView.setViewName("ageError");
}
return modelAndView;
}
}
<!--将自定义异常处理器注册到Spring容器当中-->
<bean class="com.springmvc.exception.MyHandlerException"/>
4.
@ExceptionHandler
public ModelAndView exceptionHandler(Exception ex){
ModelAndView modelAndView=new ModelAndView();
//如果发生异常，我们给他一个默认的异常处理页面
modelAndView.setViewName("error");
modelAndView.addObject("ex",ex);
//如果发生Name异常，则跳转到Name异常页面
if(ex instanceof NameException){
modelAndView.setViewName("nameError");
}
if(ex instanceof AgeException){
modelAndView.setViewName("ageError");
}
return modelAndView;
}
5.
/**
* 要让这个类处理所有Controller的异常
*/
@ControllerAdvice
public class MyControllerAdvice {
@ExceptionHandler
public ModelAndView exceptionHandler(Exception ex){
ModelAndView modelAndView=new ModelAndView();
//如果发生异常，我们给他一个默认的异常处理页面
modelAndView.setViewName("error");
modelAndView.addObject("ex",ex);
//如果发生Name异常，则跳转到Name异常页面
if(ex instanceof NameException){
modelAndView.setViewName("nameError");
}
if(ex instanceof AgeException){
modelAndView.setViewName("ageError");
}
return modelAndView;
}
}