springmvc全局异常处理

1.自定义异常类与自定义异常处理器

    1).自定义异常类

/**
*自定义异常类继承Exception
*/
public class SysException extends Exception {
    private String message;

    @Override
    public String getMessage() {
        return message;
    }
    
    public SysException(String message){
        this.message=message;
    }
}

   2).自定义异常处理器

/**
 * 自定义异常处理器实现HandlerExceptionResolver接口
 */
public class SysExceptionResolve implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
        ModelAndView mv = new ModelAndView();
        SysException sysException =null;
        if(e instanceof SysException){
              sysException= (SysException) e;
        }else {
            sysException = new SysException("服务器进入二次元了");
        }
        mv.addObject("message",sysException.getMessage());
        mv.setViewName("error");
        return mv;
    }
}

 

2.配置自定义异常处理器和编写error友好界面

      1). 在resources目录下的xml文件中配置bean

 <!--配置自定义异常处理器-->
    <bean id="sysExceptionResolve" class="cn.itcast.controller.utils.SysExceptionResolve"></bean>

<!--视图解析器-->
<bean id="internalResourceViewResolver" class="org.springframework.web.servlet.view.InternalResourceViewResolver">
    <property name="prefix" value="/WEB-INF/pages/"></property>
    <property name="suffix" value=".jsp"></property>
</bean>
 

    2).编写error友好界面

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<head>
    <title>异常界面</title>
</head>
<body>
    <h3>${message}</h3>
</body>
</html>

 

3.测试结果

  测试结果的前台代码

<%@ page contentType="text/html;charset=UTF-8" language="java" isELIgnored="false" %>
<html>
<body>
<h2>Hello World!</h2>

  <a href="/user/exception">Exception测试</a>
</body>
</html>

测试结果的后台代码

@Controller
@RequestMapping("/user")
public class UserController {
     @RequestMapping("/exception")
    public String testException() throws SysException {
         System.out.println("testException...");
         try {
             int a = 10/0;
         } catch (Exception e) {
             e.printStackTrace();
             throw new SysException("查询数据出错了");
         }
         return "success";
    }
}

 

posted on 2018-10-13 13:53  雨后黄昏  阅读(175)  评论(0)  编辑  收藏  举报

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