springboot全局异常处理详解
一、单个controller范围的异常处理
packagecom.xxx.secondboot.web; importorg.springframework.web.bind.annotation.ExceptionHandler; importorg.springframework.web.bind.annotation.RequestMapping; importorg.springframework.web.bind.annotation.RequestMethod; importorg.springframework.web.bind.annotation.RestController; importcom.xxx.secondboot.exception.MyExceptionResponse; importio.swagger.annotations.Api; @Api("测试controllerAdvice和全局异常处理") @RestController @RequestMapping("/advice1") publicclassAdviceController{ @RequestMapping(value="/test1",method=RequestMethod.GET) publicStringtest1(){ thrownewRuntimeException("advice1-exception1"); } @RequestMapping(value="/test2",method=RequestMethod.GET) publicStringtest2(){ thrownewRuntimeException("advice1-exception2"); } @ExceptionHandler(RuntimeException.class) publicMyExceptionResponseexceptionHandler(){ MyExceptionResponseresp=newMyExceptionResponse(); resp.setCode(300); resp.setMsg("exception-Handler"); returnresp; } }
说明:
- 在controller中加入被@ExceptionHandler修饰的类即可(在该注解中指定该方法需要处理的那些异常类)
- 该异常处理方法只在当前的controller中起作用
二、全部controller范围内起作用的异常处理(全局异常处理)
1、全局异常处理类
packagecom.xxx.secondboot.web; importjavax.servlet.http.HttpServletResponse; importorg.springframework.web.bind.annotation.ControllerAdvice; importorg.springframework.web.bind.annotation.ExceptionHandler; importorg.springframework.web.bind.annotation.ResponseBody; importorg.springframework.web.bind.annotation.RestController; importcom.xxx.secondboot.exception.MyExceptionResponse; importcom.xxx.secondboot.exception.MyRuntimeException; //@ControllerAdvice(annotations=RestController.class) //@ControllerAdvice(basePackages={"com.xxx","com.ooo"}) @ControllerAdvice publicclassGlobalExceptionHandler{ @ExceptionHandler(RuntimeException.class) //@ExceptionHandler(value={RuntimeException.class,MyRuntimeException.class}) //@ExceptionHandler//处理所有异常 @ResponseBody//在返回自定义相应类的情况下必须有,这是@ControllerAdvice注解的规定 publicMyExceptionResponseexceptionHandler(RuntimeExceptione,HttpServletResponseresponse){ MyExceptionResponseresp=newMyExceptionResponse(); resp.setCode(300); resp.setMsg("exception-Handler"); //response.setStatus(600); returnresp; } }
说明:
- @ControllerAdvice是controller的一个辅助类,最常用的就是作为全局异常处理的切面类
- @ControllerAdvice可以指定扫描范围
- @ControllerAdvice约定了几种可行的返回值,如果是直接返回model类的话,需要使用@ResponseBody进行json转换
- 返回String,表示跳到某个view
- 返回modelAndView
- 返回model+@ResponseBody
2、controller
packagecom.xxx.secondboot.web; importorg.springframework.web.bind.annotation.RequestMapping; importorg.springframework.web.bind.annotation.RequestMethod; importorg.springframework.web.bind.annotation.RestController; importio.swagger.annotations.Api; @Api("测试controllerAdvice和全局异常处理") @RestController @RequestMapping("/advice1") publicclassAdviceController{ @RequestMapping(value="/test1",method=RequestMethod.GET) publicStringtest1(){ thrownewRuntimeException("advice1-exception1"); } @RequestMapping(value="/test2",method=RequestMethod.GET) publicStringtest2(){ thrownewRuntimeException("advice1-exception2"); } //@ExceptionHandler(RuntimeException.class) //publicMyExceptionResponseexceptionHandler(){ //MyExceptionResponseresp=newMyExceptionResponse(); //resp.setCode(300); //resp.setMsg("exception-Handler"); //returnresp; //} }
注意:
- 同一个异常被局部范围异常处理器和全局范围异常处理器同时覆盖,会选择小范围的局部范围处理器
- 同一个异常被小范围的异常类和大范围的异常处理器同时覆盖,会选择小范围的异常处理器
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持毛票票。