@RestControllerAdvice原创
直接上代码，后面再说怎么用
1、这个是一个Form,用来接收参数的，一个简单的NotEmpty注解校验，merchantName这个参数是必传的；
package com.cloudwalk.shark.dto.validate;
import org.hibernate.validator.constraints.NotEmpty;
public class AdvertQueryForm {
@NotEmpty
private String merchantName;
private String merchantCode;
private String clientCode;
private String id;
public String getMerchantName() {
return merchantName;
}
public void setMerchantName(String merchantName) {
this.merchantName = merchantName;
}
public String getMerchantCode() {
return merchantCode;
}
public void setMerchantCode(String merchantCode) {
this.merchantCode = merchantCode;
}
public String getClientCode() {
return clientCode;
}
public void setClientCode(String clientCode) {
this.clientCode = clientCode;
}
public String getId() {
return id;
}
public void setId(String id) {
this.id = id;
}
}
2、Controller中直接通过RequestBody取到参数，下面是重点@Validated
这个注解可以直接用来校验传递的参数；
package com.cloudwalk.shark.controller; import com.cloudwalk.shark.common.utils.ResponseData;
import com.cloudwalk.shark.dto.validate.AdvertQueryForm;
import org.springframework.http.MediaType;
import org.springframework.stereotype.Controller;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestBody;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.ResponseBody; @Controller
@RequestMapping(value = "/validate", produces = {MediaType.APPLICATION_JSON_UTF8_VALUE})
public class SharkValidationController { @PostMapping("/bean")
@ResponseBody
public ResponseData checkBeanIsValid(@Validated @RequestBody AdvertQueryForm advertQueryForm){
return new ResponseData(true,"2","3",advertQueryForm);
}
}
直接友好的捕获了你的参数校验异常，统一的去实现了参数异常的捕获！
重点！produces = {MediaType.APPLICATION_JSON_UTF8_VALUE}这个参数如果不设定，默认返回的就会是XML；
package com.cloudwalk.shark.config.controllerException; import com.cloudwalk.shark.common.em.GlobalCodeEnum;
import com.cloudwalk.shark.common.utils.ResponseData;
import org.springframework.http.HttpStatus;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.MethodArgumentNotValidException;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice; import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import java.util.Set; @RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(MethodArgumentNotValidException.class)
@ResponseStatus(HttpStatus.OK)
@ResponseBody
public ResponseData handleMethodArgumentNotValidException(MethodArgumentNotValidException exception) {
StringBuilder errorInfo = new StringBuilder();
BindingResult bindingResult = exception.getBindingResult();
for(int i = 0; i < bindingResult.getFieldErrors().size(); i++){
if(i > 0){
errorInfo.append(",");
}
FieldError fieldError = bindingResult.getFieldErrors().get(i);
errorInfo.append(fieldError.getField()).append(" :").append(fieldError.getDefaultMessage());
} //返回BaseResponse
ResponseData response = new ResponseData();
response.setMessage(errorInfo.toString());
response.setCode(GlobalCodeEnum.FAIL.getErrorCode());
return response;
} @ExceptionHandler(ConstraintViolationException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
@ResponseBody
public ResponseData<String> handleConstraintViolationException(ConstraintViolationException exception) {
StringBuilder errorInfo = new StringBuilder();
String errorMessage ; Set<ConstraintViolation<?>> violations = exception.getConstraintViolations();
for (ConstraintViolation<?> item : violations) {
errorInfo.append(item.getMessage()).append(",");
}
errorMessage = errorInfo.toString().substring(0, errorInfo.toString().length()-1); ResponseData<String> response = new ResponseData<String>();
response.setMessage(errorMessage);
response.setCode(GlobalCodeEnum.FAIL.getErrorCode());
return response;
} @ExceptionHandler(Exception.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
public ResponseData<String> handleDefaultException(Exception exception) { ResponseData<String> response = new ResponseData<>();
response.setMessage("其他错误");
response.setCode(GlobalCodeEnum.FAIL.getErrorCode());
return response;
}
}