springboot 参数格式校验
@Validated
字面意思校验
@RequestBody
该注解不用多说，意思是接收为json格式的参数
@Validated
字面意思校验， 需要配合@NotBlank 或者 @NotNull 注解才能生效
进入到请求体参数中。
springboot 参数注解校验
1.添加依赖
org.springframework.boot spring-boot-starter-validation
package com.xl.annotation;
import lombok.Data;
import org.hibernate.validator.constraints.Length;
import org.hibernate.validator.constraints.Range;
import javax.validation.constraints.*;
import java.math.BigDecimal;
import java.util.Date;
@Data
public class User {
@NotNull(message = "ID不能为空")
@Range(min = 1, max = 100, message = "ID必须在1到100之间")
private Integer id;
@NotNull(message = "姓名不能为空")
@Length(min = 2, max = 6, message = "姓名必须在2到6位之间")
private String name;
@NotNull(message = "余额不能为空")
@DecimalMax(value = "30.50", message = "余额不能超过30.5")
@DecimalMin(value = "1.50", message = "余额不能低于1.5")
private BigDecimal amount;
@NotNull(message = "生日不能为空")
@Past(message = "生日必须是过去")
private Date birthday;
@NotBlank(message = "邮箱不能为空")
@Email(message = "邮箱格式不正确")
private String email;
@NotBlank(message = "手机号不能为空")
@Pattern(regexp = "^(((13[0-9])|(14[579])|(15([0-3]|[5-9]))|(16[6])|(17[0135678])|(18[0-9])|(19[89]))d{8})$", message = "手机号格式错误")
private String phone;
}2.controller层
package com.xl.annotation;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import io.swagger.annotations.ApiParam;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.*;
import javax.validation.ValidationException;
import javax.validation.constraints.Max;
import javax.validation.constraints.NotNull;
@RestController
@Validated
@Api(value = "手机验证",description = "手机验证")
public class MobileController {
@ApiOperation("手机验证")
@RequestMapping("/phone")
public String mobilePattern( Phone phone){
return "chengg";
}
@PostMapping("/getUser")
@ApiOperation("手机验证12")
public String getUserStr( @NotNull(message = "name 不能为空")@RequestParam String name,
@Max(value = 99, message = "不能大于99岁")@RequestParam Integer age) {
return "name: " + name + " ,age:" + age;
}
/* @PostMapping("/getUser1")
@ApiOperation("手机验证c")
public String getUser(@RequestBody @Validated User user, BindingResult bindingResult) {
validData(bindingResult);
return "name: " + user.getName() + " ,age:" + user.getAge();
}*/
private void validData(BindingResult bindingResult) {
if (bindingResult.hasErrors()) {
StringBuffer sb = new StringBuffer();
for (ObjectError error : bindingResult.getAllErrors()) {
sb.append(error.getDefaultMessage());
}
throw new ValidationException(sb.toString());
}
}
@PostMapping("/test")
@ApiOperation(value = "测试", notes = "")
public String test(@ApiParam(name = "test", value = "参数", required = true) @Validated @RequestBody User test, BindingResult bindingResult) {
validData(bindingResult);
if(bindingResult.hasErrors()){
String errorMsg = bindingResult.getFieldError().getDefaultMessage();
return errorMsg;
}
return "参数验证通过";
}
}3.自定义一个抛出异常类
package com.xl.annotation;
import org.springframework.http.HttpStatus;
import org.springframework.web.bind.annotation.ExceptionHandler;
import org.springframework.web.bind.annotation.ResponseStatus;
import org.springframework.web.bind.annotation.RestControllerAdvice;
import javax.validation.ConstraintViolation;
import javax.validation.ConstraintViolationException;
import javax.validation.ValidationException;
import java.util.Set;
/**
* 自定义验证抛出异常
*/
@RestControllerAdvice
public class GlobalExceptionHandler {
@ExceptionHandler(ValidationException.class)
@ResponseStatus(HttpStatus.BAD_REQUEST)
public String handle(ValidationException exception) {
if(exception instanceof ConstraintViolationException){
ConstraintViolationException exs = (ConstraintViolationException) exception;
Set> violations = exs.getConstraintViolations();
for (ConstraintViolation item : violations) {
//打印验证不通过的信息
System.out.println(item.getMessage());
}
}
return exception.getMessage();
}
} 4.加一个当检测第一个参数不合法时立即返回错误不会继续进行校验
package com.xl.annotation;
import org.hibernate.validator.HibernateValidator;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import javax.validation.Validation;
import javax.validation.Validator;
import javax.validation.ValidatorFactory;
@Configuration
public class ValidatorConf {
@Bean
public Validator validator() {
ValidatorFactory validatorFactory = Validation.byProvider( HibernateValidator.class )
.configure()
.failFast( true )
.buildValidatorFactory();
Validator validator = validatorFactory.getValidator();
return validator;
}
} 
