jquery.validationEngine ajax表单验证数据库重复，指定数据库表名（tableName）、表字段（columnName）和录入数据（inputValue）进行验证，sql为 select count(*) from tableNamewhere columnName = inputValue，判断count并返回。
需要修改jquery.validationEngine.js和jquery.validationEngine-zh_CN.js文件来完成。
/**
* Ajax field validation
*
* @param {jqObject} field
* @param {Array[String]} rules
* @param {int} i rules index
* @param {Map}
* user options
* @return nothing! the ajax validator handles the prompts itself
*/
_ajax: function(field, rules, i, options) {
var errorSelector = rules[i + 1];
/**
* 增加参数 表名和字段名
*/
var tableName = "";
var columnName = "";
if( rules[i + 2])
tableName = rules[i + 2];
if( rules[i + 3])
columnName = rules[i + 3];
var rule = options.allrules[errorSelector];
var extraData = rule.extraData;
var extraDataDynamic = rule.extraDataDynamic;
var data = {
"fieldId" : field.attr("id"),
"fieldValue" : field.val(),
"tableName" : tableName,
"columnName" : columnName
};
if (typeof extraData === "object") {
$.extend(data, extraData);
} else if (typeof extraData === "string") {
var tempData = extraData.split("&");
for(var i = 0; i < tempData.length; i++) {
var values = tempData[i].split("=");
if (values[0] && values[0]) {
data[values[0]] = values[1];
}
}
} //tls warning:homegrown not fielded
"dateTimeFormat": {
"regex": /^\d{4}[\/\-](0?[1-9]|1[012])[\/\-](0?[1-9]|[12][0-9]|3[01])\s+(1[012]|0?[1-9]){1}:(0?[1-5]|[0-6][0-9]){1}:(0?[0-6]|[0-6][0-9]){1}\s+(am|pm|AM|PM){1}$|^(?:(?:(?:0?[13578]|1[02])(\/|-)31)|(?:(?:0?[1,3-9]|1[0-2])(\/|-)(?:29|30)))(\/|-)(?:[1-9]\d\d\d|\d[1-9]\d\d|\d\d[1-9]\d|\d\d\d[1-9])$|^((1[012]|0?[1-9]){1}\/(0?[1-9]|[12][0-9]|3[01]){1}\/\d{2,4}\s+(1[012]|0?[1-9]){1}:(0?[1-5]|[0-6][0-9]){1}:(0?[0-6]|[0-6][0-9]){1}\s+(am|pm|AM|PM){1})$/,
"alertText": "* 无效的日期或时间格式",
"alertText2": "可接受的格式： ",
"alertText3": "mm/dd/yyyy hh:mm:ss AM|PM 或 ",
"alertText4": "yyyy-mm-dd hh:mm:ss AM|PM"
},
//通用表单验证
"checkIsExist" : {
"url" : "Common!checkIsExist.action",
"extraData" : "",
"alertText" : "* 输入值已被使用",
"alertTextLoad" : "* 正在确认输入值是否被使用，请稍等。"
}<%@ page contentType="text/html; charset=UTF-8"%>
<html>
<head>
<title></title>
<link rel="stylesheet" type="text/css" href="./jquery/css/validationEngine.jquery.css" />
<script type="text/javascript" src="./jquery/jquery-1.9.1.js"></script>
<script type="text/javascript" src="./jquery/jquery.validationEngine.js"></script>
<script type="text/javascript" src="./jquery/jquery.validationEngine-zh_CN.js"></script>
<script type="text/javascript">
function insertTest() {
$("#myform").submit();
}
function listTest() {
var myform = document.forms[0];
myform.action = "Test!list.action";
myform.method = "post";
myform.submit();
}
function init(){
$("#myform").validationEngine({
// 属性promptPosition : "bottomLeft"
});
}
</script>
</head>
<body onload="init();">
<h1>样例</h1>
<hr>
<form name="myform" id="myform" action="Test!save.action" method="post">
<!--对ID进行重复验证-->
id: <input type="text" name="test.id" class="validate[required,ajax[checkIsExist,t_test,id]]"> <br> <br>
name： <input type="text" name="test.name" class="validate[required,minSize[1],maxSize[10]]" > <br>
<input type="button" name="btninsert" onclick="insertTest()" value="增加" />
<input type="button" name="btninsert" onclick="listTest()" value="列表页面" />
</form>
</body>
</html>
package com.zhou.bean;
/**
* @author zhouzhenlong
* @date 2014-1-29 上午11:02:40
* @description
* @version V1.0
*/
public class Common {
/**
* tableName 表名
*/
private String tableName;
/**
* @param columnName
* 列名
*/
private String columnName;
/**
* @param columnValue
* 列值
*/
private String columnValue;
public String getTableName() {
return tableName;
}
public void setTableName(String tableName) {
this.tableName = tableName;
}
public String getColumnName() {
return columnName;
}
public void setColumnName(String columnName) {
this.columnName = columnName;
}
public String getColumnValue() {
return columnValue;
}
public void setColumnValue(String columnValue) {
this.columnValue = columnValue;
}
}
package com.zhou.action;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts2.ServletActionContext;
import com.opensymphony.xwork2.ActionContext;
import com.zhou.bean.Common;
import com.zhou.services.CommonService;
/**
* @author zhouzhenlong
* @date 2014-1-29 上午11:00:14
* @description
* @version V1.0
*/
public class CommonAction {
private static final long serialVersionUID = 1L;
private CommonService commonService;
/**
* 公用方法，根据表名 列名 和值检查数据库是否存在该信息
*/
public void checkIsExist() {
PrintWriter pw = null;
try {
ActionContext ac = ActionContext.getContext();
HttpServletRequest request = (HttpServletRequest) ac.get(ServletActionContext.HTTP_REQUEST);
HttpServletResponse response = (HttpServletResponse) ac.get(ServletActionContext.HTTP_RESPONSE);
String fieldId = request.getParameter("fieldId");
String tableName = request.getParameter("tableName");
String columnName = request.getParameter("columnName");
String fieldValue = request.getParameter("fieldValue");
Common common = new Common();
common.setTableName(tableName);
common.setColumnName(columnName);
common.setColumnValue(fieldValue);
int count = commonService.checkIsExist(common);
pw = response.getWriter();
if (count == 0) {
pw.write("[\"" + fieldId + "\"," + true + "]");
} else
pw.write("[\"" + fieldId + "\"," + false + "]");
} catch (Exception e) {
e.printStackTrace();
} finally {
pw.flush();
pw.close();
}
}
public void setCommonService(CommonService commonService) {
this.commonService = commonService;
}
}
package com.zhou.services;
import com.zhou.bean.Common;
/**
* @author zhouzhenlong
* @date 2014-1-29 上午11:05:40
* @description
* @version V1.0
*/
public interface CommonService {
/**
* 验证接口
* @param common
* @return
*/
public int checkIsExist(Common common);
}
package com.zhou.services.impl;
import com.zhou.bean.Common;
import com.zhou.dao.CommonDao;
import com.zhou.services.CommonService;
/**
* @author zhouzhenlong
* @date 2014-1-29 上午11:08:37
* @description
* @version V1.0
*/
public class CommonServiceImpl implements CommonService {
private CommonDao commonDao;
@Override
public int checkIsExist(Common common) {
// TODO Auto-generated method stub
return commonDao.checkIsExist(common);
}
public void setCommonDao(CommonDao commonDao) {
this.commonDao = commonDao;
}
}
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN" "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.zhou.dao.CommonDao">
<select id="checkIsExist" parameterType="com.zhou.bean.Common"
resultType="int">
select count(*) from ${tableName}
where ${columnName} =
#{columnValue}
</select>
</mapper>
<!-- ajax通用验证 -->
<bean id="commonAction" class="com.zhou.action.CommonAction"
scope="prototype">
<property name="commonService" ref="commonService" />
</bean>
<bean id="commonDao" class="org.mybatis.spring.mapper.MapperFactoryBean"
scope="prototype">
<property name="mapperInterface" value="com.zhou.dao.CommonDao" />
<property name="sqlSessionFactory" ref="sqlSessionFactory" />
</bean>
<bean id="commonService" class="com.zhou.services.impl.CommonServiceImpl"
scope="prototype">
<property name="commonDao" ref="commonDao" />
</bean>
<action name="Common!*" class="commonAction" method="{1}">
</action>
