spring-mvc學習整理 form validation

使用@Valid annatation的表單校驗

須要引入的依賴 ：

 javax.validation.validation-api-1.0.0.GA.jar  校驗標準接口

hibernate-annotations-3.4.0.GA.jar，hibernate-validator-4.0.1.GA.jar hibernate提供的實現包

slf4j-api-1.5.0.jar，slf4j-nop-1.5.0.jar 日誌依賴包

1.pojo Form

public class LeadsForm {
    /**
     * @see  javax.validation.constraints.NotNull 使用標準中的註釋類
     */
    @NotNull 
    @Size()
    private String  contactName;
    @NotNull 
    @Pattern(regexp = "^1\\d{10}$")
    private String  contactTel;

    //~~GETTERS && SETTERS
}

2.controller

/**
 * Renhenet.com Inc.
 * Copyright (c) 2004-2012 All Rights Reserved.
 */
package com.renhenet.web;
import javax.validation.Valid;

import org.springframework.stereotype.Controller;
import org.springframework.ui.ModelMap;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.ModelAttribute;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;

import sample.LeadsForm;

/**
 *
 * @author  xiaoxia.dong
 * @version $Id: PostController.java,v 1.1 2012/08/10 14:38:11 dongxx Exp $
 */
@Controller
@RequestMapping("/post.html")
public class PostController {

    @ModelAttribute("leadsForm")
    public void modelAttribute(LeadsForm leadsForm) {
    }

    //使用 @Valid 
    @RequestMapping(method = RequestMethod.POST)
    public String processSubmit(@Valid LeadsForm leadsForm, BindingResult result, ModelMap map) {
        if (result.hasErrors()) {
           
        }

        return "post";
    }
}

使用@Valid annatation 就不用在xml文件中配置 validator。其實使用了接口org.springframework.validation.Validator，默認實現類org.springframework.validation.beanvalidation.LocalValidatorFactoryBean

3.使用velocity模板，創建macro。spring的RequestContext能夠經過$springMacroRequestContext變量在velocity中使用。

另外error.code恰好是@NotNull @Pattern等的類名

#macro( getErrorCode $objectName $field)
#set($errors = $springMacroRequestContext.getErrors($objectName))#if($errors && $errors.fieldErrors && $errors.fieldErrors.size()>0)#foreach($e in $errors.fieldErrors)#if("$!field"=="$e.field")$e.code#end#end#end
#end

#macro( Pattern $objectName $field $message)
	#if("#getErrorCode($objectName,$field)"=="Pattern")
		$!message
	#end
#end
#macro( NotNull $objectName $field $message)
	#if("#getErrorCode($objectName,$field)"=="NotNull")
		$!message
	#end
#end
#macro( Size $objectName $field $message)
	#if("#getErrorCode($objectName,$field)"=="Size")
		$!message
	#end
#end

模板頁面這樣使用

<form class="form-horizontal" method="post">
  <fieldset>
    <legend>快速報名</legend>
    <div class="control-group">
      <label class="control-label" for="input01">姓名</label>
      <div class="controls">
        <input type="text" class="input-xlarge" name="contactName" value="$!leadsForm.contactName">
        <p class="help-block">字母，數字，漢字皆可 #getErrorCode("leadsForm","contactName")</p>
      </div>
    </div>
    <div class="control-group">
      <label class="control-label" for="input01">手機號碼</label>
      <div class="controls">
         <input type="text" class="input-xlarge" name="contactTel">
        <p class="help-block">#Pattern("leadsForm","contactTel","手機號碼的格式不正確")</p>
        
      </div>
    </div>
    <div class="control-group">
      <label class="control-label" for="input01">地址</label>
      <div class="controls">
         <select name="contactRegion" id="user_region" onchange='select_region("user_hot","H",this.value)' class="span2">
         <option value="">-請選擇-</option>
         </select>
         #NotNull("leadsForm","contactRegion","請選擇地區")
         <select name="contactRegionHot" id="user_hot" class="span2">
         <option value="">-請選擇-</option>
         </select>
         <input type="text" class="input-xlarge" name="contactAddress">
         #Size("leadsForm","contactAddress","請輸入詳細地址")
      </div>
    </div>
  </fieldset>
  <input type="submit" value="報名">
</form>