java：Springmvc框架3（Validator）

1.springmvcValidator：

　　web.xml：

<?xml version="1.0" encoding="UTF-8"?>
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd" id="WebApp_ID" version="3.0">
  <display-name>springmvc01</display-name>
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>

  <!-- 解决post提交乱码问题 -->
  <filter>
      <filter-name>encodingFilter</filter-name>
      <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
      <init-param>
          <param-name>encoding</param-name>
          <param-value>UTF-8</param-value>
      </init-param>
  </filter>
  <filter-mapping>
      <filter-name>encodingFilter</filter-name>
      <url-pattern>/*</url-pattern>
  </filter-mapping>

  <!-- spring mvc的前端控制器,类似struts2的核心过滤器 -->
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>

      <!-- 通过contextConfigLocation参数指定配置文件的位置，默认在WEB-INF/查找名称为 [servlet-name]-servlet.xml -->
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
      </init-param>

      <!-- servlet随web容器而启动 -->
      <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>
</web-app>

　　springmvc.xml：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xsi:schemaLocation="http://www.springframework.org/schema/beans
      http://www.springframework.org/schema/beans/spring-beans-4.3.xsd
      http://www.springframework.org/schema/mvc
      http://www.springframework.org/schema/mvc/spring-mvc.xsd
      http://www.springframework.org/schema/context
      http://www.springframework.org/schema/context/spring-context.xsd">

     <!-- 注解扫描!!!-->
      <context:component-scan base-package="cn.zzsxt.controller"></context:component-scan>

          <!-- 配置视图解析器 -->
    <!-- InternalResourceViewResolver：支持JSP视图解析 -->
    <!-- viewClass：JstlView表示JSP模板页面需要使用JSTL标签库，所以classpath中必须包含jstl的相关jar包； -->
    <!-- prefix 和suffix：查找视图页面的前缀和后缀，最终视图的址为： -->
    <!-- 前缀+逻辑视图名+后缀，逻辑视图名需要在controller中返回ModelAndView指定，比如逻辑视图名为hello，-->
    <!-- 则最终返回的jsp视图地址 "WEB-INF/view/hello.jsp" -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
        <property name="viewClass" value="org.springframework.web.servlet.view.JstlView"></property>
        <property name="prefix" value="/"></property>
        <property name="suffix" value=".jsp"></property>
    </bean>

    <!--文件上传视图解析器-->
    <bean id="multipartResolver" class="org.springframework.web.multipart.commons.CommonsMultipartResolver">
         <!--允许上传的文件最大大小  单位是byte-->
        <property name="maxUploadSize" value="100000000"></property>
    </bean>

       <!-- 注解映射器
        说明 ：对类中标记@ResquestMapping的方法进行映射，根据ResquestMapping定义的url匹配
        ResquestMapping标记的方法，匹配成功返回HandlerMethod对象给前端控制器，HandlerMethod对象中封装url对应的方法Method
    -->
    <!--
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping"/>
    -->
    <!-- 注解适配器
         说明：注解式处理器适配器，对标记@ResquestMapping的方法进行适配。
    -->
    <!--
    <bean class="org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter"/>
    -->
    <!-- springmvc使用<mvc:annotation-driven> -->
    <!-- 自动加载RequestMappingHandlerMapping和RequestMappingHandlerAdapter， -->
    <!-- 可用在springmvc.xml配置文件中使用<mvc:annotation-driven>替代注解处理器和适配器的配置。 -->
    <mvc:annotation-driven validator="validator"></mvc:annotation-driven>

     <!-- 处理静态资源 让静态资源可以直接访问-->
<!--     <mvc:resources mapping="/jquery-ui-1.12.1.custom/**" location="/jquery-ui-1.12.1.custom/"/> -->
    <!-- 当在web.xml 中 DispatcherServlet使用 <url-pattern>/</url-pattern> 映射时，能映射静态资源  -->
     <mvc:default-servlet-handler/>

        <!-- 加载校验信息资源文件 -->
    <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource">
        <!-- 资源文件的基础名称 -->
        <property name="basenames">
            <list>
                <value>classpath:CustomValidationMessages</value>
            </list>
        </property>

        <!-- 资源文件的编码集 -->
        <property name="fileEncodings" value="UTF-8"></property>
        <!-- 资源文件的缓存时间 -->
        <property name="cacheSeconds" value="120"></property>
    </bean>

    <!-- 校验器 -->
    <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean">
        <property name="providerClass" value="org.hibernate.validator.HibernateValidator"></property>
        <property name="validationMessageSource" ref="messageSource"></property>
    </bean>
</beans>

　　CustomValidationMessages.properties：

username.length.error=\u7528\u6237\u540D\u957F\u5EA6\u5FC5\u987B\u57286\u4F4D\u523010\u4F4D\u4E4B\u95F4\!
username.isnull.error=\u7528\u6237\u540D\u4E0D\u80FD\u4E3A\u7A7A\!
password.isnull.error=\u5BC6\u7801\u4E0D\u80FD\u4E3A\u7A7A\!

　　UserController.java：

package cn.zzsxt.controller;

import java.util.List;

import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.validation.ObjectError;
import org.springframework.validation.annotation.Validated;
import org.springframework.web.bind.annotation.RequestMapping;

import cn.zzsxt.group.ValidationGroup1;
import cn.zzsxt.group.ValidationGroup2;
import cn.zzsxt.model.Userinfo;
@Controller
@RequestMapping("/user")
public class UserController {

    @RequestMapping("/add")
    public String add(@Validated(value={ValidationGroup1.class}) Userinfo user,BindingResult result,Model model){
        //判断是否存在错误消息
        if(result.hasErrors()){
            //获取所有错误消息
            List<ObjectError> list = result.getAllErrors();
            for (ObjectError objectError : list) {
                System.out.println("错误码:"+objectError.getCode());
                System.out.println("错误消息:"+objectError.getDefaultMessage());
            }
            model.addAttribute("errors", list);
            return "add";
        }
        System.out.println("执行了add()方法....");
        return "success";
    }

    @RequestMapping("/login")
    public String login(@Validated(value={ValidationGroup2.class}) Userinfo user,BindingResult result,Model model){
        //判断是否存在错误消息
        if(result.hasErrors()){
            //获取所有错误消息
            List<ObjectError> list = result.getAllErrors();
            for (ObjectError objectError : list) {
                System.out.println("错误码:"+objectError.getCode());
                System.out.println("错误消息:"+objectError.getDefaultMessage());
            }
            model.addAttribute("errors", list);
            return "add";
        }
        System.out.println("执行了login()方法....");
        return "success";
    }
}

　　ValidationGroup1.java：

package cn.zzsxt.group;

public interface ValidationGroup1 {

}

　　ValidationGroup2.java：

　　

package cn.zzsxt.group;

public interface ValidationGroup2 {

}

　　

　　Userinfo.java：

package cn.zzsxt.model;

import javax.validation.constraints.Size;

import org.hibernate.validator.constraints.NotEmpty;

import cn.zzsxt.group.ValidationGroup1;
import cn.zzsxt.group.ValidationGroup2;

public class Userinfo {
    private int userId;
    @Size(min=6,max=10,message="{username.length.error}",groups={ValidationGroup1.class})
    @NotEmpty(message="{username.isnull.error}",groups={ValidationGroup2.class})
    private String userName;

    @NotEmpty(message="{password.isnull.error}")
    private String password;

    public int getUserId() {
        return userId;
    }
    public void setUserId(int userId) {
        this.userId = userId;
    }
    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;
    }

}

　　add.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>
  </head>

  <body>
     <c:forEach items="${errors}" var="error">
         ${error.defaultMessage}<br>
     </c:forEach>
     <hr>
      <form action="user/add" method="post">
          用户名:<input type="text" name="userName"/><br>
          密码:<input type="text" name="password"/><br>
          <input type="submit" value="提交"/>
      </form>
  </body>
</html>

　　login.jsp：

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core"  prefix="c" %>
<%
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    <base href="<%=basePath%>">

    <title>My JSP 'index.jsp' starting page</title>
  </head>

  <body>
     <c:forEach items="${errors}" var="error">
         ${error.defaultMessage}<br>
     </c:forEach>
     <hr>
      <form action="user/login" method="post">
          用户名:<input type="text" name="userName"/><br>
          密码:<input type="text" name="password"/><br>
          <input type="submit" value="提交"/>
      </form>
  </body>
</html>