spring boot——请求与参数校验——重要概念——异常处理——@ControllerAdvice注解——华章...

清疚 2023-09-29 00:29 1阅读 0赞

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package org.example.Exception;
    
    public class MyException extends RuntimeException
    {
        private int code;
        private String msg;
    
        public MyException(String msg){
            super(msg);
            this.code=500;
            this.msg = msg;
        }
    
        public int getCode() {
            return code;
        }
    
        public void setCode(int code) {
            this.code = code;
        }
    
        public String getMsg() {
            return msg;
        }
    
        public void setMsg(String msg) {
            this.msg = msg;
        }
    }

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package org.example.controller.GlobalExceptionHandler;
    
    import org.example.Exception.MyException;
    import org.springframework.web.bind.annotation.ControllerAdvice;
    import org.springframework.web.bind.annotation.ExceptionHandler;
    import org.springframework.web.bind.annotation.ResponseBody;
    import org.springframework.web.servlet.ModelAndView;
    import java.util.HashMap;
    import java.util.Map;
    
    @ControllerAdvice
    public class GlobalExceptionHandlerController
    {
        /**
         * 返回页面
         * @param e
         * @return
         */
        @ExceptionHandler(RuntimeException.class)
        public ModelAndView handle(RuntimeException e){
            ModelAndView modelAndView = new ModelAndView();
            modelAndView.setViewName("errorPage");
            modelAndView.addObject("code", 500);
            modelAndView.addObject("msg", e.getMessage());
            return modelAndView;
        }
    
        /**
         * 返回JSON
         * @param e
         * @return
         */
        @ResponseBody
        @ExceptionHandler(MyException.class)
        public Map<String,Object> handleMyException(MyException e){
            Map<String,Object> map = new HashMap<>();
            map.put("code",e.getCode());
            map.put("message",e.getMsg());
            return map;
        }
    }

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package org.example.controller.GlobalExceptionHandler;
    
    import org.example.Exception.MyException;
    import org.springframework.stereotype.Controller;
    import org.springframework.web.bind.annotation.RequestMapping;
    import org.springframework.web.bind.annotation.RestController;
    
    import java.sql.SQLException;
    
    @RestController
    public class HandleExceptionController
    {
    //    @RequestMapping("/f123")
    //    public String index()
    //    {
    //
    //        return "index";
    //    }
    //
    //    @RequestMapping("/db")
    //    public void db() throws SQLException
    //    {
    //
    //        throw new SQLException("数据库异常");
    //    }
    //
    //    @RequestMapping("/my")
    //    public void my() throws MyException
    //    {
    //
    //        throw new MyException("自定义异常");
    //    }
    //
    //    @RequestMapping("/no")
    //    public void no() throws Exception
    //    {
    //
    //        throw new Exception("未知异常");
    //    }
    //
    //
    //
        @RequestMapping("/index")
        public String index(){
            int n = 1/0;
            return "SUCCESS";
        }
    
        @RequestMapping("/test")
        public String testException(){
            throw new MyException("sorry,it is too bad");
        }
    
    
    }

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