Question

我的控制器中有以下GET请求：

@Controller
public class TestController {

    @InitBinder
    protected void initBinder(WebDataBinder binder) {
        binder.setValidator(new ProfileTokenValidator());
    }

    @RequestMapping(value = "/more/{fromLocation:.+}/to/{toLocation:.+}", method = RequestMethod.GET)
    @ResponseBody
    public void copyProfile(@PathVariable @Valid String fromLocation, @PathVariable String toLocation) {
    ...
    }
}

我有一个简单的字符串fromLocation验证器

public class ProfileTokenValidator implements Validator{

    @Override
    public boolean supports(Class validatedClass) {
        return String.class.equals(validatedClass);
    }

    @Override
    public void validate(Object obj, Errors errors) {
        String location = (String) obj;

        if (location == null || location.length() == 0) {
            errors.reject("destination.empty", "Destination should not be empty.");
        }
    }

}

当fromLocation与toLocation相同时，我需要为case提供验证的问题。请帮忙咨询一下，有没有办法编写验证器，它会同时检查两个参数的Get请求？感谢。

块引用

Answer 1

这是一个坏主意。我走了另一条路，在控制器中创建了一个简单的方法来验证我的参数。如果出现错误，它会抛出特殊异常，由处理程序处理。此处理程序在抛出之前返回400状态错误请求和消息。所以它的行为与自定义验证器完全相同。通过此链接http://doanduyhai.wordpress.com/2012/05/06/spring-mvc-part-v-exception-handling/

的文章提供了很大的帮助

以下是我的代码：

@Controller
public class TestController {

    @RequestMapping(value = "/more/{fromLocation:.+}/to/{toLocation:.+}", method = RequestMethod.GET)
    @ResponseBody
    public void copyProfile(@PathVariable String fromLocation, @PathVariable String toLocation) {
        validateParams(fromLocation, toLocation);
        ...
    }

    private void validateParams(String fromLocation, String toLocation) {
        if(fromLocation.equals(toLocation)) {
            throw new BadParamsException("Bad request: locations should differ.");
        }
    }

    @ExceptionHandler(BadParamsException.class)
    @ResponseStatus(value = HttpStatus.BAD_REQUEST)
    @ResponseBody
    public String handleBadParamsException(BadParamsException ex) {
        return ex.getMessage();
    }

    @ResponseStatus(value = HttpStatus.BAD_REQUEST)
    public static class BadParamsException extends RuntimeException {
        public BadParamsException(String errorMessage) {
            super(errorMessage);
        }
    }
}

多个参数的Spring验证器

1 个答案: