springMVC异常处理总结-蒲公英云

springMVC异常处理总结

Myth丶恋晨 2024-04-17 21:03 91阅读 0赞

直接上手记录一下总结吧：
模拟异常的java后台：

@RequestMapping("/testException")
    public String testException()throws Exception{
        System.out.println("testException方法执行了。。。");
        //模拟异常
        try {
            int a = 10/0;
        } catch (Exception e) {
            e.printStackTrace();
            throw new SysException("查询用户出现错误...");
        }
        return "success";
    }

异常类：

public class SysException extends Exception {
    //存储提示信息
    private String message;
    public SysException(String message) {
        this.message = message;
    }
    @Override
    public String getMessage() {
        return message;
    }
    public void setMessage(String message) {
        this.message = message;
    }
}

异常处理器类：

public class SysExceptionResolver implements HandlerExceptionResolver {
    @Override
    public ModelAndView resolveException(HttpServletRequest httpServletRequest, HttpServletResponse httpServletResponse, Object o, Exception e) {
        SysException sysException = null;
        if (e instanceof SysException){
            sysException = (SysException) e;
        }else {
            sysException = new SysException("系统正在维护...");
        }
        //创建ModelAndView对象
        ModelAndView modelAndView = new ModelAndView();
        modelAndView.addObject("errorMsg",sysException.getMessage());
        modelAndView.setViewName("error");
        return modelAndView;
    }
}