jquery easyUI中ajax异步校验用户名

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var isExist = true;//这里设置一个标识符用于后面阻止表单的提交$(function(){  //表单的验证  $('#fname').validatebox({   required:true ,    missingMessage:'用户名不能为空!' ,   precision:0  });  $('#floginname').validatebox({   required:true ,    missingMessage:'登录名不能为空!',   precision:0  });  //对于添加按钮的绑定  $('#addBtn').bind('click',function(){   addUser();  }); });/**  * 添加用户  */ function addUser(){ var obj = $('#orgTree').tree('getSelected'); if(obj){  $('#fdepname').val($('#orgTree').tree('getSelected').text);  $('#fdepid').val($('#orgTree').tree('getSelected').id);  $('#operator_user').dialog({   width:350,   height:300,   title:'新增管理',   modal:true,   buttons:[{    text:'提交',    handler: function(){    //判断是否符合条件      if(!isExist){      if($('#operator_user').form('validate')){       $.ajax({        url:"<%=request.getContextPath()%>/peixun/addUser.action",        type:"post",        dataType:'json',        data:$('#myform').serialize(),               success:function(data,response,status){         if(data.type=='success'){          $.messager.alert("提示","新增成功!");          $('#sysUserTable').datagrid('reload');          $('#operator_user').dialog('close');          //清空表单          $('#myform')[0].reset();         }else{          $.messager.alert("提示","新增失败!");         }        }       });      }     }    }   },{    text:'取消',    handler: function(){     $('#operator_user').dialog('close');     $('#myform')[0].reset();    }   }],  });  }else if(obj==null){   alert("未选择树。。。"); }};/**  * AJAX异步校验用户名  */function checkUserName(){   var floginname = $("#floginname").val();   $.ajax({  url :"${contextPath}/peixun/checkUserName.action",  type:'POST',  data:{   loginname:floginname  },     dataType:'json',  success:function(data){  //根据后台返回的数据来进行判断，并给出提示。   if (data.type == "true") {    $("#label")[0].innerHTML="<font color='red'>登录名重复</font>";    isExist = true;   }else if(data.type == "false") {    $("#label")[0].innerHTML="<font color='green'>恭喜你,登录名可以使用</font>";    isExist = false;   }  },  error:function(data){   alert("获取用户信息失败，请联系管理员！");  } });}

package ais.peixun.web;import java.io.Serializable;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import ais.adl.model.TreeNode;import ais.framework.struts.BaseAction;import ais.framework.util.UUID;import ais.peixun.service.PeixunService;import ais.user.model.UUser;public class PeixunAction extends BaseAction { private static final long serialVersionUID = 6269156200927918770L; private PeixunService peixunService; private Map<String, Object> resultMap = new HashMap<String, Object>(); private UUser user; private String id; private String fname; private String floginname; private String name; private String loginname; private String fsex; /**  * 添加用户  ** public String addUser(){  try{   if(user !=null){    String id = new UUID().toString();    user.setFuserid(id);    Serializable ser = this.peixunService.addOneUser(user);    if(ser != null && ser!=""){     this.resultMap.put("type","success");    }else{     this.resultMap.put("type","error");    }   }   }catch(Exception e){   e.printStackTrace();  }  return SUCCESS; } /**  * 校用名是否存在的方法  */ public String checkUserName(){  try{   if(loginname !=null&&loginname !=null){   //这里通过daoImpl返回的数据来进行判断    int count=this.peixunService.checkUserName(loginname);    if(count==1){    //将结果true放到 type中返回给前台     this.resultMap.put("type","true");    }else{     this.resultMap.put("type","false");    }   }  }catch(Exception e){   e.printStackTrace();  }  return SUCCESS; } public PeixunService getPeixunService() {  return peixunService; } public void setPeixunService(PeixunService peixunService) {  this.peixunService = peixunService; } public Map<String, Object> getResultMap() {  return resultMap; } public void setResultMap(Map<String, Object> resultMap) {  this.resultMap = resultMap; }  public String getFname() {  return fname; } public void setFname(String fname) {  this.fname = fname; } public String getFloginname() {  return floginname; } public void setFloginname(String floginname) {  this.floginname = floginname; } public String getFsex() {  return fsex; } public void setFsex(String fsex) {  this.fsex = fsex; } public String getFdepname() {  return fdepname; } public void setFdepname(String fdepname) {  this.fdepname = fdepname; } public UUser getUser() {  return user; } public void setUser(UUser user) {  this.user = user; } public String getName() {  return name; } public void setName(String name) {  this.name = name; } public String getLoginname() {  return loginname; } public void setLoginname(String loginname) {  this.loginname = loginname; } public String getId() {  return id; } public void setId(String id) {  this.id = id; }}

package ais.peixun.service;import java.io.Serializable;import java.util.List;import java.util.Map;import ais.adl.model.TreeNode;import ais.framework.service.IBaseService;import ais.user.model.UUser;public interface PeixunService extends IBaseService { public Serializable addOneUser(UUser user);  public int checkUserName(String loginname);}package ais.peixun.service.impl;import java.io.Serializable; import java.util.List;import java.util.Map;import ais.adl.model.TreeNode;import ais.framework.service.impl.BaseServiceImpl;import ais.peixun.dao.PeixunDao;import ais.peixun.service.PeixunService;import ais.user.model.UUser;public class PeixunServiceImpl extends BaseServiceImpl implements PeixunService { private PeixunDao peixunDao; public PeixunDao getPeixunDao() {  return peixunDao; } public void setPeixunDao(PeixunDao peixunDao) {  this.peixunDao = peixunDao; } @Override  public Serializable addOneUser(UUser user){  return this.peixunDao.addOneUser( user); } @Override public int checkUserName(String loginname) {  return this.peixunDao.checkUserName(loginname); }}

package ais.peixun.dao;import java.io.Serializable;import java.util.List;import java.util.Map;import ais.adl.model.TreeNode;import ais.framework.dao.IBaseDAO;import ais.user.model.UUser;public interface PeixunDao extends IBaseDAO { public Serializable addOneUser(UUser user);  public int checkUserName(String loginname);}

import java.io.Serializable;import java.sql.SQLException;import java.util.ArrayList;import java.util.List;import java.util.Map;import org.hibernate.HibernateException;import org.hibernate.Query;import org.hibernate.Session;import org.springframework.dao.DataAccessException;import org.springframework.orm.hibernate3.HibernateCallback;import com.sybase.jdbc2.jdbc.Convert;import ais.adl.model.TreeNode;import ais.framework.dao.hibernate.BaseDAOImpl;import ais.organization.model.UOrganization;import ais.peixun.dao.PeixunDao;import ais.resmngt.audobj.model.AuditingObject;import ais.user.model.UUser;/** * @author Forlangel * */public class PeixunDaoImpl extends BaseDAOImpl implements PeixunDao { /*   * 添加用户  */ @Override public Serializable addOneUser(UUser user) {  Serializable ser;  try{   ser = this.getHibernateTemplate().save(user);  }catch(Exception e){   e.printStackTrace();   return null;  }  return ser; } /*   * ajax校验  */ @SuppressWarnings("unchecked") @Override public int checkUserName( String loginname) {   //设置一个标识符用于返回    int flag = 0;   try{     StringBuffer sbf=new StringBuffer();    sbf.append("from UUser u where u.floginname =");    sbf.append("'"+loginname+"'");    //如果从数据库中查询出数据，表示用户名重复    List<UUser> list =this.getHibernateTemplate().find(sbf.toString());    if( list.size() > 0){        flag = 1;      }    }catch(Exception e){    e.printStackTrace();   }   return flag; }}