Ajax+struts用户验证

package com.web.action; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import org.apache.struts.action.ActionForm; import org.apache.struts.action.ActionForward; import org.apache.struts.action.ActionMapping; import com.systex.eyehospital.storage.mgr.UtilMgr; import com.systex.utils.baseaction.BaseAction; /** * 公用方法Action * */ public class UtilAction extends BaseAction { private UtilMgr utilMgr; public void setUtilMgr(UtilMgr utilMgr) { this.utilMgr = utilMgr; } /** * 数据查重 */ public ActionForward checkDataRepeat(ActionMapping mapping,ActionForm form, HttpServletRequest request,HttpServletResponse response)throws Exception { String tableName=request.getParameter("tableName");//表名 String colName=request.getParameter("colName");//列名 String colValue=request.getParameter("colValue");//列值 String responseStr = ""; if(utilMgr.isRepeat(tableName, colName, colValue))//调用业务类方法验证 { responseStr="该代码已被使用,请用其他代码!"; } response.setContentType("text/xml"); response.setHeader("Cache-Control", "no-cache"); response.setHeader("Content-Type", "text/xml; charset=utf-8"); response.getWriter().print(responseStr); response.getWriter().close(); return null; } }