如何添加e.getmessage（）作為Java方法的回報

Question

如果以下方法有任何問題，是否可以在返回結果中添加異常？

我嘗試了以下方式，但收到驗證錯誤消息

 Multiple markers at this line
- e cannot be resolved to a variable
- e cannot be resolved 


@RestController
public class RunnerController {

    @RequestMapping(value="/run", method=RequestMethod.POST)    
    public String runScript(@RequestParam Integer order) {      
        try{
            //some code here//
        } catch (Exception e) { 
            log.error("An unexpected error occurred when attempting to run script. The error was: " + e.getMessage() + ".", e);
        }
        return ("An unexpected error occurred running script. The error was: " + e.getMessage());
    }
}

Answer 1

如果您將其返回到catch塊中，該怎么辦？

public class RunnerController { 
    @RequestMapping(value="/run", method=RequestMethod.POST)    
    public String runScript(@RequestParam Integer order) {      
        try{
            //some code here//
        } catch (Exception e) { 
            log.error("An unexpected error occurred when attempting to run script. The error was: " + e.getMessage() + ".", e);
            return ("An unexpected error occurred running script. The error was: " + e.getMessage());
        }

        return ("No unexpected error occurred running script");

    }
}

Answer 2

香檳代碼如下

 @RequestMapping(value="/run", method=RequestMethod.POST)    
    public String runScript(@RequestParam Integer order) {     
    String message = null;
        try{
            //some code here//
    } catch (Exception e) { 
      message = e.getMessage();
        log.error("An unexpected error occurred when attempting to run script. The error was: " + e.getMessage() + ".", e);
    }
        return message != null ? message : "something that you want to return";

    }

或者您可以直接從catch返回錯誤消息。

Answer 3

您應該在catch返回異常e ，因為在外部不可見