如何添加e.getmessage（）作为Java方法的回报

Question

Is it possible to add the exception in the return result incase of any issues in the below method?

I tried the below way but receiving validation error message

 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

What if you return it in the catch block, like

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

Chagne code as below

 @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";

    }

or you can return error message directly from catch.

Answer 3

您应该在catch返回异常e ，因为在外部不可见