一，参数校验

springmvc中我们可以使用第三方的校验框架来实现请求参数的校验，常用hibernate的校验框架validation1.pom中导入所需依赖hibernate-validator-4.3.2.Final.jarjboss-logging-3.1.0.CR2.jarvalidation-api-1.0.0.GA.jar
2.配置验证器<!-- 配置验证器 --><bean id="myvalidator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"><property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property></bean> <mvc:annotation-driven validator="myvalidator"/>3.创建实体类，用注解配置校验规则public class Phone {private Integer id;@NotBlank(message = "品牌呢？")private String brand;@NotBlank(message = "没型号？")private String model;@Max(value = 99999, message = "太贵了吧？")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";}}注意：参数列表中，被校验的参数（phone）和BindingResult必须相邻并保证顺序。5.jsp显示错误信息品  牌：<input type="text" name="brand"><span style="color: red;">${ brandmsg }</span><br>型  号：<input type="text" name="model"><span style="color: red;">${ modelmsg }</span><br>价  格：<input type="text" name="price"><span style="color: red;">${ pricemsg }</span><br>二，SpringMVC中的文件上传

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-data
4.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