2，Spring-mvc添加參數校驗：避免參數格式不正確致使的400

 在有參數校驗的基礎上，新建異常處理類：（@ControllerAdvice("com.store.score.rpc.web")控制訪問提示信息範圍）

package com.store.score.util;

import java.util.HashMap;
import java.util.List;
import java.util.Map;
import javax.servlet.http.HttpServletResponse;
import javax.validation.UnexpectedTypeException;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.http.HttpStatus;
import org.springframework.http.converter.HttpMessageNotReadableException;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
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.bind.annotation.ResponseStatus;
import com.store.score.model.response.MapResModel;

@ResponseBody
@ControllerAdvice("com.store.score.rpc.web")
public class ApiExceptionHandler {
    private static final Logger LOGGER = LoggerFactory.getLogger(ApiExceptionHandler.class);

    /**
     * @param exception UnexpectedTypeException
     * @param response
     * @return
     */
    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(UnexpectedTypeException.class)
    public MapResModel unexpectedType(UnexpectedTypeException exception, HttpServletResponse response){
    	MapResModel mapResModel = new MapResModel();
        LOGGER.error("校驗方法太多，不肯定合適的校驗方法。", exception);
        mapResModel.failure("校驗方法太多，不肯定合適的校驗方法。");
        return mapResModel;
    }

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(HttpMessageNotReadableException.class)
    public MapResModel messageNotReadable(HttpMessageNotReadableException exception, HttpServletResponse response){
    	MapResModel mapResModel = new MapResModel();
        LOGGER.error("請求參數不匹配。", exception);
        mapResModel.failure("請求參數不匹配："+exception.getMessage());
        return mapResModel;
    }

    @ResponseStatus(HttpStatus.BAD_REQUEST)
    @ExceptionHandler(Exception.class)
    public MapResModel ex(MethodArgumentNotValidException exception, HttpServletResponse response){
    	MapResModel mapResModel = new MapResModel();
        LOGGER.error("請求參數不合法。", exception);
        Map<String, String> map = getErrors(exception.getBindingResult());
        mapResModel.setData(map);
        mapResModel.failure("請求參數不合法。");
        return mapResModel;
    }

    private Map<String, String> getErrors(BindingResult result) {
        Map<String, String> map = new HashMap<>();
        List<FieldError> list = result.getFieldErrors();
        for (FieldError error : list) {
            map.put(error.getField(), error.getDefaultMessage());
        }
        return map;
    }
}