（六）struts2- 2.3.15.3 spring3.2.4 mybatis-3.2.3 jquery.validationEngine ajax表单验证 数据库重复



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。

1、            修改jquery.validationEngine.js文件1359行修改如下：

/**
		* 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];
					}
				}
			 }

2、            修改jquery.validationEngine-zh_CN.js文件171行增加checkIsExist方法：

 //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。"
				}

3、            修改test.jsp,在ID input 增加class class="validate[required,ajax[checkIsExist,t_test,id]]"

checkIsExist为增加的js方法，t_test数据库表名，id表字段

<%@ page contentType="text/html; charset=UTF-8"%>













	
样例
	

	

		
		id:  
 
 
		name：  
 
		
		
	

4、            在包bean下增加实体Common.java

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;
	}

}

5、            在包Action下增加CommonAction.java

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;
	}

	
}

6、            在包sevices下增加接口CommonService.java

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);
	
}

7、            在service.impl增加CommonServiceImpl实现类

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;
	}

}

8、            在mapper下增加common-mapper.xml

	
		select count(*) from ${tableName}
		where ${columnName} =
		#{columnValue}
	

9、            在applicationContext-beans.xml增加类注入关系

10、            在struts-test.xml增加映射关系

11、            部署到tomcat下访问http://localhost:8080/Test/test.jsp在Id输入框中输入验证