技術標籤：Javaspringspring boot

一.不用springboot，使用validation引數校驗需要自己寫ValidationUtil工具類，來校驗

public class ValidatorUtil {  
    private static Validator validator = Validation.buildDefaultValidatorFactory()  
            .getValidator();  
      
    public static <T> Map<String,StringBuffer>
 
 validate(T obj){  
        Map<String,StringBuffer> errorMap = null;  
        Set<ConstraintViolation<T>> set = validator.validate(obj,Default.class);  
        if(set != null && set.size() >0 ){  
            errorMap = new HashMap<String,StringBuffer>();  
            String property =
 
 null;  
            for(ConstraintViolation<T> cv : set){  
                //這裡迴圈獲取錯誤資訊，可以自定義格式  
                property = cv.getPropertyPath().toString();  
                if(errorMap.get(property) != null){  
                    errorMap.get(property).append("," + cv.getMessage(
 
));  
                }else{  
                    StringBuffer sb = new StringBuffer();  
                    sb.append(cv.getMessage());  
                    errorMap.put(property, sb);  
                }  
            }  
        }  
        return errorMap;  
    }  

在測試類中的使用方法（片段）

 public static void main(String[] args) {  
        StudentInfo s = new StudentInfo();  
        long startTime = System.currentTimeMillis();  
        print(ValidatorUtil.validate(s));  
        System.out.println("===============耗時(毫秒)=" + (System.currentTimeMillis() - startTime));  

二.使用springboot需要加上註解@Validated和引入相關依賴

<!--validate 依賴-->
        <dependency>
            <groupId>javax.validation</groupId>
            <artifactId>validation-api</artifactId>
            <version>1.1.0.Final</version>
        </dependency>
        <dependency>
            <groupId>org.hibernate</groupId>
            <artifactId>hibernate-validator</artifactId>
            <version>5.4.1.Final</version>
        </dependency>
        <dependency>
            <groupId>org.jboss.logging</groupId>
            <artifactId>jboss-logging</artifactId>
            <version>3.3.0.Final</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml</groupId>
            <artifactId>classmate</artifactId>
            <version>1.3.3</version>
        </dependency>

1.使用@valid + BindingResult來處理，並且要在controller裡面寫關於bindingresult返回結果的判斷來列印資訊 （太麻煩）

@PostMapping("/UserRegister")
@ApiOperation("使用者註冊")
public Object userRegister(@Valid UserRegisterForm registerForm, BindingResult bindingResult) {
    return userService.UserRegister(registerForm, bindingResult);
}

2.使用全域性異常處理，在controller里加上@valid註解即可，不需要bindingresult，也不用判斷bindingresult返回的值（推薦）

@ControllerAdvice
public class ValidationUtil{

    @ExceptionHandler(org.springframework.validation.BindException.class)
    @ResponseBody
    public ResultVO handleEx(BindException e){
        List<FieldError> fieldErrors = e.getFieldErrors();
        StringBuilder sb = new StringBuilder();
        for(FieldError fe: fieldErrors){
            sb.append("屬性:").append(fe.getField()).append("校驗不通過:").append(fe.getDefaultMessage()).append("; ");
        }
        log.info("引數錯誤 : "+sb);
        return ResultVOUtil.error(sb);
    }
}

測試程式碼：

@Data
public class LoginForm {

    @NotNull(message = "手機號不能為空")
    @ApiModelProperty("手機號")
    private String phone;

    @NotNull(message = "密碼不能為空")
    @ApiModelProperty("密碼")
    private String password;

    @NotNull(message = "驗證碼不能為空")
    @ApiModelProperty("驗證碼")
    private String securityCode;

    //  @NotNull(message = "驗證碼不能為空")
    //  @ApiModelProperty("驗證碼")
    //  private String securityCode;
}

執行案例：