复制代码 代码如下:
步骤二 公用js文件 dictionary.js
复制代码 代码如下:
$(function(){
$("#code").blur(callback);//1.code就是你要验证的唯一标志的控件ID 2.你控件后面必须要有个接收错误信息的控件
$("#submit").click(callback);//你页面的提交按钮ID
});
function callback() {
var slef=$("#code");
var code=slef.val();
var submit=$("#submit");
var flag=$("#flag").val();
if(null==code||""==code){
slef.next().html("下载包标识不能为空!");
submit.attr("disabled",true);
return;
}else{
if(!code.match("^\w+$")){
slef.next().html("标识由数字母或下划线组成!");
return ;
}
slef.next().html("*");
}
$.ajax({
type:'post',
url:'../dictionary/checkCodeOnly.do',
data:'bean.code='+code+'&bean.flag='+flag,
dataType:'json',
success:function(json){
if(json>0){
slef.next().html("此标识已存在!");
submit.attr("disabled",true);
return ;
}else{
slef.next().html("");
if(code != null && code!=""){
submit.attr("disabled",false);
}else{
submit.attr("disabled",true);
return;
}
}
},
error:function(){
alert('验证信息出错');
}
});
}
步骤三 页面部分
复制代码 代码如下:
*
步骤四 action里的方法
复制代码 代码如下:
public void checkCodeonly(){
String json="";
try{
json = String.valueOf(yhaoDictionaryService.checkCodeonly(bean));
json=JSON.toJSonString(json);
System.out.println("json=="+json);
HttpServletResponse response=ServletActionContext.getResponse();
response.setContentType("text/html");
response.setCharacterEncoding("utf-8");
PrintWriter out;
out = response.getWriter();
out.println(json);
out.flush();
out.close();
}catch(Exception e){
e.printStackTrace();
}
}
步骤五 dao里的方法
复制代码 代码如下:
public int checkCodeonly(DictionaryBean bean)throws DataAccessException,Exception {
Object[] sqlParams = new Object[4];
int index = 0;
String sql="";
if (bean.getFlag().equals("1")) {
sql = "select count(1) from YHAO_PORTALS_PAGE where PAGE_FLAG = ? ";
sqlParams[index]=bean.getCode();
index++;
}
if (bean.getFlag().equals("2")) {
sql = "select count(1) from YHAO_PORTALS_DOWNTYPE where DOWNTYPE_FLAG = ? ";
sqlParams[index]=bean.getCode();
index++;
}
if (bean.getFlag().equals("3")) {
sql = "select count(1) from YHAO_PORTALS_DOWN where DOWN_FLAG = ? ";
sqlParams[index]=bean.getCode();
index++;
}
if (bean.getFlag().equals("4")) {
sql = "select count(1) from YHAO_PORTALS_KUAI where KUAI_FLAG = ? ";
sqlParams[index]=bean.getCode();
index++;
}
Object[] sqlParamsEnd = new Object[index];
System.arraycopy(sqlParams, 0, sqlParamsEnd, 0, index);
int count = this.queryForInt(sql,sqlParamsEnd);
return count;
} 
