Spring MVC异常处理

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;
    }
}

 

 

posted @ 2019-11-11 16:58  听风忆雪  阅读(161)  评论(0)  编辑  收藏  举报