这篇“SpringBoot集成Validation参数校验的方法是什么”文章的知识点大部分人都不太理解,所以小编给大家总结了以下内容,内容详细,步骤清晰,具有一定的借鉴价值,希望大家阅读完这篇文章能有所收获,下面我们一起来看看这篇“spri
这篇“SpringBoot集成Validation参数校验的方法是什么”文章的知识点大部分人都不太理解,所以小编给大家总结了以下内容,内容详细,步骤清晰,具有一定的借鉴价值,希望大家阅读完这篇文章能有所收获,下面我们一起来看看这篇“springBoot集成Validation参数校验的方法是什么”文章吧。
SpringBoot在WEB启动器中已经包含validator包
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId></dependency>
非SpringBoot项目,需要自定引入依赖
<dependency> <groupId>org.hibernate.validator</groupId> <artifactId>hibernate-validator</artifactId> <version>6.1.5.Final</version></dependency><dependency> <groupOd>org.glassfish</groupId> <artifactId>jakarta.el</artifactId> <version>3.0.3</version></dependency>
package com.smile.project.validator.utils; public class 常用约束说明 { }
import com.smile.project.validator.utils.Gender;import lombok.Data;import javax.validation.constraints.Email;import javax.validation.constraints.NotNull;import javax.validation.constraints.Size; @Datapublic class SysUser { private Long id; @NotNull(message = "用户名不能为空") @Size(min = 3,max = 5,message = "用户名长度为{min}-{max}之间") private String username; @NotNull(message = "昵称不能为空") private String name; @NotNull(message = "密码不能为空") private String passWord; @Email(message = "邮箱格式不合法") private String email; private String gender; }
需要在class加上@Validated注解
如果参数时实体,需要加上@Valid注解
import com.smile.project.validator.entity.SysUser;import org.springframework.Http.ResponseEntity;import org.springframework.validation.annotation.Validated;import org.springframework.web.bind.annotation.GetMapping;import org.springframework.web.bind.annotation.PostMapping;import org.springframework.web.bind.annotation.RestController;import javax.validation.Valid;import javax.validation.constraints.NotNull; @RestController@Validatedpublic class SysUserController { @PostMapping("/reGISter") public ResponseEntity register(@Valid SysUser sysUser){ return ResponseEntity.ok(sysUser); } @GetMapping("user") public ResponseEntity getUser(@NotNull(message = "用户名不能为空") String username){ SysUser sysUser = new SysUser(); sysUser.setName("smile"); return ResponseEntity.ok(sysUser); } }
全局异常捕获,当出现参数校验不合法时捕获异常,并且返回给前端
import org.springframework.http.ResponseEntity;import org.springframework.validation.FieldError;import org.springframework.validation.ObjectError;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 javax.validation.ConstraintViolation;import javax.validation.ConstraintViolationException;import java.util.HashMap;import java.util.List;import java.util.Set; @ControllerAdvicepublic class GlobHandler { @ExceptionHandler(ConstraintViolationException.class) @ResponseBody public ResponseEntity constraintViolationExceptionHandler(ConstraintViolationException e){ Set<ConstraintViolation<?>> message = e.getConstraintViolations(); HashMap<String,Object> map = new HashMap<>(); message.stream().forEach(msg ->{ String path = msg.getPropertyPath().toString(); String field = path.substring(path.indexOf(".")+1); map.put(field,msg.getMessageTemplate()); }); return ResponseEntity.ok(map); } @ExceptionHandler(MethodArgumentNotValidException.class) @ResponseBody public ResponseEntity resolveMethodArgumentNotValidException(MethodArgumentNotValidException e){ List<ObjectError> allErrors = e.getBindingResult().getAllErrors(); HashMap<String,Object> map = new HashMap<>(); allErrors.stream().forEach(error -> { FieldError fieldError = (FieldError) error; map.put(fieldError.getField(),fieldError.getDefaultMessage()); }); return ResponseEntity.ok(map); } }
特殊的字段需要自定义规则,比如身份证号码,邮箱,电话等
6.1、定义校验注解
import com.smile.project.validator.utils.GenderValidator;import javax.validation.Constraint;import javax.validation.Payload;import java.lang.annotation.*;import static java.lang.annotation.ElementType.FIELD;import static java.lang.annotation.ElementType.METHOD;import static java.lang.annotation.RetentionPolicy.RUNTIME; @Target({METHOD,FIELD})@Retention(RUNTIME)@Constraint(validatedBy = GenderValidator.class)@Documentedpublic @interface Gender { String message() default "性别为男或者女"; Class<?>[] groups() default {}; Class<? extends Payload[]>[] payload() default {}; }
6.2、GenderValidator实现ConstraintValidator接口并提供校验规则
import javax.validation.ConstraintValidator;import javax.validation.ConstraintValidatorContext; public class GenderValidator implements ConstraintValidator<Gender,String> { //初始化校验值 @Override public void initialize(Gender constraintAnnotation) { } //检验规则 @Override public boolean isValid(String value, ConstraintValidatorContext content) { return "男".equals(value) || "女".equals(value); }}
6.3、在成员变量中使用注解
import com.smile.project.validator.utils.Gender;import lombok.Data;import javax.validation.constraints.Email;import javax.validation.constraints.NotNull;import javax.validation.constraints.Size; @Datapublic class SysUser { private Long id; @NotNull(message = "用户名不能为空") @Size(min = 3,max = 5,message = "用户名长度为{min}-{max}之间") private String username; @NotNull(message = "昵称不能为空") private String name; @NotNull(message = "密码不能为空") private String password; @Email(message = "邮箱格式不合法") private String email; @Gender() private String gender; }
默认情况下,不指定分组都属于默认组;使用分组校验有利于分层校验开发
7.1、新建两个接口,一个用于查询,一个用于添加
public interface ADD extends Default { } public interface Select extends Default { }
7.2、修改尸体校验规则,如果不指定分组默认时Default组;
import com.smile.project.validator.utils.Gender;import lombok.Data;import javax.validation.constraints.Email;import javax.validation.constraints.NotNull;import javax.validation.constraints.Size; @Datapublic class SysUser { private Long id; @NotNull(message = "用户名不能为空",groups = ADD.class) @Size(min = 3,max = 5,message = "用户名长度为{min}-{max}之间") private String username; @NotNull(message = "昵称不能为空",groups = Select.class) private String name; @NotNull(message = "密码不能为空",groups = ADD.class) private String password; @Email(message = "邮箱格式不合法",groups = Select.class) private String email; @Gender() private String gender; }
7.3、控制层示例,此时只会校验ADD组和Default组
//分组校验@PostMapping("/user")public ResponseEntity addUser(@Validated(value = ADD.class) @RequestBody SysUser sysUser){ return ResponseEntity.ok(sysUser);}
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