SpringMVC 属性校验

快来打我* 2022-05-27 06:46 183阅读 0赞

属性校验是在用户输入一些数据后针对这些数据有无错误进行检测。

加入下边3个包

hibernate-validator-6.0.9.Final.jar

validation-api-2.0.1.Final.jar

jboss-logging-3.3.2.Final.jar

然后在springmvc.xml配置文件里加入校验器

<mvc:annotation-driven validator="validator">  
        </mvc:annotation-driven>  
        <context:component-scan base-package="com.samrtian.action"/> 
        
        
    	<bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
    		<property name="providerClass" value="org.hibernate.validator.HibernateValidator"/>
    
    		<property name="validationMessageSource" ref="messageSource"/>
    	</bean>
    
    	<bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
    		<property name="basenames">
    			<list>
    				<value>classpath:CustomValidationMessages</value>
    			</list>
    		</property>
    		<property name="fileEncodings" value="utf-8"/>
    		<property name="cacheSeconds" value="120"/>
    	</bean>

接着在需要校验的属性字段上加入注解

public class TUser {
    	private Integer id;
            //user.name.length.error是在CustomValidationMessages.properties配置文件里定义的key=value
    	@Size(min=6, max=30, message="{user.name.length.error}")
        private String name;
    
    	@NotNull(message="user.password.length.error")
        private String password;

接下来在控制器里对需要校验的字段加注解

@RequestMapping("/login.do")
    	public String login(Model model, @Validated TUser user, BindingResult bindingResult) throws Exception {
    		// TODO Auto-generated method stub	
                     @Validated BingdingResult是配对使用的一前一后
    		if (bindingResult.hasErrors()) {
    			List<ObjectError> allError = bindingResult.getAllErrors();
    			for (ObjectError objectError : allError) {
    				System.out.println(objectError.getDefaultMessage());
    			}
    			model.addAttribute("error", allError);
    			return "forward:index.jsp";
    		}
    		return "LoginSuccess";
    	}

前台页面接收error参数显示即可