Spring Boot MVC请求参数Validation及国际化

傷城~ 2022-11-13 11:21 324阅读 0赞

### 目录 ###

*  一、Validation及国际化配置
 *   *  1、添加依赖
     *  2、校验失败提示消息国际化配置
     *  3、application.properties
     *  4、国际化资源文件
 *  二、代码演示
 *   *  1、全局异常处理
     *  2、MessageUtils工具类
     *  3、响应VO
     *  2、测试Controller和请求DTO
     *  3、多语言属性文件
     *  4、测试用例
     *   *  (1)简单对象UserReqDTO测试
         *  (2)包含List集合对象的ChargeRuleReqDTO测试

# 一、Validation及国际化配置 #

## 1、添加依赖 ##

<dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-validation</artifactId>
    </dependency>

## 2、校验失败提示消息国际化配置 ##

@Configuration
    public class ValidationConfig { 
    
    	@Bean
    	public LocalValidatorFactoryBean defaultValidator(MessageSource messageSource) { 
    		LocalValidatorFactoryBean factoryBean = new LocalValidatorFactoryBean();
    		factoryBean.setValidationMessageSource(messageSource);
    		return factoryBean;
    	}
    }

> Spring Boot中针对Validation和国际化有两个自动配置类：  
> 1、**ValidationAutoConfiguration**  
> 2、**MessageSourceAutoConfiguration**  
> 其中**MessageSourceAutoConfiguration**会自动实例化一个**MessageSource**实例，如下：  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70]

## 3、application.properties ##

#国际化配置，basename可以用全限定类名，如下，也可以是i18n/message
    spring.messages.basename=i18n.messages
    spring.messages.encoding=UTF-8

> 更多配置可参考：  
> [https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html\#common-application-properties-integration][https_docs.spring.io_spring-boot_docs_current_reference_html_appendix-application-properties.html_common-application-properties-integration].  
> ![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 1]

## 4、国际化资源文件 ##

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 2]

> 注意：我们basename的配置为：**spring.messages.basename=i18n.messages**  
> 因此在类路径下新建`i18n`的文件夹即可，而不是`i18n/messages`文件夹,文件夹内必须有一个文件名称为message.properties的属性文件，不然会有问题。多语言以messages\_语言\_国家.properties命名。

# 二、代码演示 #

## 1、全局异常处理 ##

public class GlobalExceptionHandler { 
    
    	@ResponseBody
    	@ExceptionHandler(MethodArgumentNotValidException.class)
    	public ApiRespVO<?> handleException(MethodArgumentNotValidException e) { 
    		FieldError fieldError = e.getBindingResult().getFieldError();
    		// 校验注解名称
    		String code = fieldError.getCode();
    		// 校验字段名称
    		String field = fieldError.getField();
    		// 检验失败默认消息
    		String defaultMessage = fieldError.getDefaultMessage();
    
    		List<Object> args = Arrays.stream(Optional.ofNullable(fieldError.getArguments()).orElse(new Object[] { }))
    			.filter(argument -> !(argument instanceof DefaultMessageSourceResolvable))
    			.map(Object::toString)
    			.collect(Collectors.toList());
    		args.add(0, field);
    
    		// 默认根据注解名称取，如果没有则取默认消息
    		String errorMsg = MessageUtils.getMessage(code, args.toArray(), LocaleContextHolder.getLocale(), StringUtils.EMPTY);
    		if (StringUtils.isNotBlank(errorMsg)) { 
    			return ApiRespVO.failure(ErrorCode.INVALID_PARAM, errorMsg);
    		}
    
    		return ApiRespVO.failure(ErrorCode.INVALID_PARAM, defaultMessage);
    	}
    }

> 备注：关于LocalContextHolder，每次web请求到来时，Spring中的`RequestContextFilter`会将Locale实例注入到LocalContextHolder。

## 2、MessageUtils工具类 ##

public class MessageUtils { 
    
    	private static MessageSource messageSource = WebApplicationContextHolder.getBean(MessageSource.class);
    
    	public static String getMessage(String code, Object[] args, Locale locale, String defaultValue) { 
    		return messageSource.getMessage(code, args, defaultValue, locale);
    	}
    
    	public static String getMessage(String code, Object[] args, Locale locale) { 
    		return messageSource.getMessage(code, args, locale);
    	}
    
    }

## 3、响应VO ##

public class ApiRespVO<T> { 
    
    	private static final String SUCCESS = "00000";
    	private static final String FAILURE = "99999";
    
    	private String code;
    	private String message;
    	private T data;
    
    	public static <T> ApiRespVO<T> success() { 
    		return success(null);
    	}
    
    	public static <T> ApiRespVO<T> success(T data) { 
    		ApiRespVO<T> apiRespDTO = new ApiRespVO<>();
    		apiRespDTO.setCode(SUCCESS);
    		apiRespDTO.setData(ObjectUtils.defaultIfNull(data, (T) new Object()));
    		return apiRespDTO;
    	}
    
    	public static <T> ApiRespVO<T> failure(String code) { 
    		return failure(code, new Object[] { });
    	}
    
    	public static <T> ApiRespVO<T> failure(String code, Object[] args) { 
    		String errorMsg = MessageUtils.getMessage(code, args, LocaleContextHolder.getLocale());
    		return failure(FAILURE, errorMsg);
    	}
    
    	public static <T> ApiRespVO<T> failure(String code, String message) { 
    		ApiRespVO<T> apiRespDTO = new ApiRespVO<>();
    		apiRespDTO.setCode(code);
    		apiRespDTO.setMessage(message);
    		return apiRespDTO;
    	}
    
    	public String getCode() { 
    		return code;
    	}
    
    	public void setCode(String code) { 
    		this.code = code;
    	}
    
    	public String getMessage() { 
    		return message;
    	}
    
    	public void setMessage(String message) { 
    		this.message = message;
    	}
    
    	public T getData() { 
    		return data;
    	}
    
    	public void setData(T data) { 
    		this.data = data;
    	}
    
    	@Override
    	public String toString() { 
    		return ToStringBuilder.reflectionToString(this, ToStringStyle.SHORT_PREFIX_STYLE);
    	}
    }

## 2、测试Controller和请求DTO ##

@RestController
    public class ValidationController { 
    
    	@Autowired
    	private MessageSource messageSource;
    
    	@RequestMapping("/validate")
    	public ApiRespVO<?> hanldeRequest(@Validated @RequestBody UserReqDTO userDTO) { 
    		return ApiRespVO.success();
    	}
    
    	@RequestMapping("/validate-list")
    	public ApiRespVO<?> validateListParam(@Validated @RequestBody ChargeRuleReqDTO request) { 
    		return ApiRespVO.success();
    	}
    }

public class UserReqDTO { 
    
    	@NotNull
    	private String username;
    
    	@NotBlank
    	@Length(min = 5,max = 8)
    	private String password;
    
    	@Size(max = 1)
    	private String gender;
    
    	@Positive
    	private int age;
    
    	@NotBlank
    	@Pattern(regexp = "^\\d{11}$", message = "{Pattern.UserReqDTO.phone}")
    	private String phone;
    
    	public String getUsername() { 
    		return username;
    	}
    
    	public void setUsername(String username) { 
    		this.username = username;
    	}
    
    	public String getPassword() { 
    		return password;
    	}
    
    	public void setPassword(String password) { 
    		this.password = password;
    	}
    
    	public String getGender() { 
    		return gender;
    	}
    
    	public void setGender(String gender) { 
    		this.gender = gender;
    	}
    
    	public int getAge() { 
    		return age;
    	}
    
    	public void setAge(int age) { 
    		this.age = age;
    	}
    
    	public String getPhone() { 
    		return phone;
    	}
    
    	public void setPhone(String phone) { 
    		this.phone = phone;
    	}
    }

public class ChargeRuleReqDTO { 
    
    	@NotBlank
    	private String appId;
    
    	@Valid
    	private List<ChannelChargeInfo> chargeInfo;
    
    	private static class ChannelChargeInfo { 
    
    		@NotBlank
    		private String channelCode;
    
    		@NotNull
    		private BigDecimal channelCharge;
    
    		public String getChannelCode() { 
    			return channelCode;
    		}
    
    		public void setChannelCode(String channelCode) { 
    			this.channelCode = channelCode;
    		}
    
    		public BigDecimal getChannelCharge() { 
    			return channelCharge;
    		}
    
    		public void setChannelCharge(BigDecimal channelCharge) { 
    			this.channelCharge = channelCharge;
    		}
    	}
    
    	public String getAppId() { 
    		return appId;
    	}
    
    	public void setAppId(String appId) { 
    		this.appId = appId;
    	}
    
    	public List<ChannelChargeInfo> getChargeInfo() { 
    		return chargeInfo;
    	}
    
    	public void setChargeInfo(List<ChannelChargeInfo> chargeInfo) { 
    		this.chargeInfo = chargeInfo;
    	}
    }

> 备注：如果请求参数DTO中实例变量为List集合对象，则要加上`@Valid注解`，否则校验不会生效。

## 3、多语言属性文件 ##

**messages.properties**

NotNull=
    NotBlank=
    Length=
    Positive=
    Pattern.UserReqDTO.phone=

> 备注：文件内容为空即可

**messages\_en\_US.properties**

NotNull=[{ 0}] cannot be null
    NotBlank=[{ 0}] cannot be blank
    Length=[{ 0}] minimum length is { 2},maximum length is { 1}
    Positive=[{ 0}] must be greater than 0
    Pattern.UserReqDTO.phone=phone number format is invalid and must be digit. maximum length is 11

**messages\_zh\_CN.properties**

NotNull=[{ 0}]不能为空
    NotBlank=[{ 0}]不能为空
    Length=[{ 0}]最小长度为{ 2},最大长度为{ 1}
    Positive=[{ 0}]必须大于
    Pattern.UserReqDTO.phone=手机号格式不正确，必须为全数字，长度为11位

## 4、测试用例 ##

### (1)简单对象UserReqDTO测试 ###

`语言为中文：`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 3]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 4]  
`语言为英文：`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 5]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 6]

### (2)包含List集合对象的ChargeRuleReqDTO测试 ###

`语言为中文：`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 7]  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 8]

`语言为英文：`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L2xpbmdib21hbmJ1X2x5bA_size_16_color_FFFFFF_t_70 9]  
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[https_docs.spring.io_spring-boot_docs_current_reference_html_appendix-application-properties.html_common-application-properties-integration]: https://docs.spring.io/spring-boot/docs/current/reference/html/appendix-application-properties.html#common-application-properties-integration
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