Spring frame--day04 parameter checksum file upload

One, the parameter check

Springmvc We can use a third-party calibration framework to achieve the validation of request parameters, commonly used hibernate check framework Validation1.pom import required Dependency Hibernate-validator-4.3.2.final.jar Jboss-logging-3.1.0.cr2.jar validation-api-1.0.0.ga.jar2. Configure Authenticator <!--configuration Validator-<bean id= "Myvalidator" CLA ss= "Org.springframework.validation.beanvalidation.LocalValidatorFactoryBean" > <property name= " Providerclass "value=" Org.hibernate.validator.HibernateValidator "></property> </bean> &LT;MVC: Annotation-driven validator= "Myvalidator"/>3. Create an entity class, configure the validation rule with annotations public class Phone {private Integer ID; @NotBlank (message = "Brand? ") Private String brand; @NotBlank (message = "no model?") ") Private String model; @Max (value = 99999, message = "too expensive?" ") Private Integer price; @DateTimeFormat (pattern = "YYYY-MM-DD") private Date launchdate; GETTERS and SETTERS ...} 4.contorller: @RequestMapping ("add") public String Add (Model MD, @Valid phone phone, Bindingresult bR) throws Exception {if (br.haserrors ()) {Fielderror brand = Br.getfielderror ("brand"); Fielderror model = Br.getfielderror ("model"); Fielderror Price = Br.getfielderror ("price"); if (brand = null) {Md.addattribute ("brandmsg", Brand.getdefaultmessage ()); } if (model! = NULL) {Md.addattribute ("modelmsg", Model.getdefaultmessage ()); } if (price! = null) {Md.addattribute ("pricemsg", Price.getdefaultmessage ()); } return "Add"; } else {phoneservice.add (phone); return "Redirect:list"; Note: In the parameter list, the checked parameters (phone) and Bindingresult must be adjacent and guaranteed in order. 5.JSP Display error message product?? Card: <input type= "text" Name= "brand" ><span style= "color:red;" >${brandmsg}</span><br> type?? Number: <input type= "text" name= "model" ><span style= "color:red;" >${modelmsg}</span><br> price?? Lattice: <iNput type= "text" name= "price" ><span style= "color:red;" >${pricemsg}</span><br>
two, file upload in Springmvc

1.springmvc对fileupload进行了封装，使用上传需要先导入fileupload的依赖： <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.2</version> </dependency>2.还需要在springmvc的配置文件中配置文件解析器： <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver"> <property name="maxUploadSize" value="10240000"/> </bean>3.表单中需要指定提交方式为post，并将enctype改为multipart/form-data4.完成以上设置，就可以在controller方法中接收文件了： @RequestMapping("/upload") public String upload(@RequestParam("fileName") CommonsMultipartFile file) throws Exception { } 注意该参数需要通过@RequestParam指定参数名

常用校验注解

@Null	The annotated element must be null
@NotNull	The annotated element must not be null
@NotEmpty	The annotated string must be non-empty
@NotBlank	The validation string is non-null and must be longer than 0
@Min (value)	The annotated element must be a number whose value must be greater than or equal to the specified minimum value
@Max (value)	The annotated element must be a number whose value must be less than or equal to the specified maximum value
@Size (max=, min=)	The size of the annotated element must be within the specified range
@Pattern (regex=)	The annotated element must conform to the specified regular expression
@Email	The annotated element must be an e-mail address
@DecimalMin (value)	The annotated element must be a number whose value must be greater than or equal to the specified minimum value
@DecimalMax (value)	The annotated element must be a number whose value must be less than or equal to the specified maximum value
@Digits (integer, fraction)	The annotated element must be a number whose value must be within an acceptable range
@Past	The annotated element must be a past date
@Future	The annotated element must be a future date
@Length (min=,max=)	The size of the annotated string must be within the specified range
@Range (min=,max=)	The annotated element must be within the appropriate range
@AssertTrue	The annotated element must be true
@AssertFalse	The annotated element must be false

Spring frame--day04 parameter checksum file upload