Ajax check whether duplicate implementation code-JS Tutorial-php.cn

Ajax check whether duplicate implementation code

亚连

Release： 2018-05-22 16:15:17

Original

1892 people have browsed it

This article mainly introduces the implementation code of Ajax verification for duplication. It is very good and has reference value. Friends in need can refer to

and post the code directly!

1. Controller layer:

@ResponseBody 
@RequestMapping("entityFindByCode") 
public String entityFindByCode(Entity bean, HttpSession httpSession, Model m,HttpServletResponse res) throws IOException{ 
  res.setContentType("text/plain; charset=UTF-8"); 
  //res.reset(); 
  //PrintWriter out = res.getWriter(); 
  String data=null; 
  @SuppressWarnings("unchecked") 
  List<Entity> list = (List<Entity>) this.service.find("beanByCode", "Entity", new Object[]{bean.getCode()}); 
  if(list.size()==0){ 
    data="YES"; 
  }else{ 
    data="NO"; 
  } 
  res.getOutputStream().write(data.getBytes()); 
  //out.print(data); 
  //out.flush(); 
  //out.close(); 
  return data; 
}

Copy after login

2. HTML layer:

$.ajax({ 
      url    :&#39;entityFindByCode&#39;, 
      type   :&#39;post&#39;, 
      dataType :&#39;text&#39;, 
      data   :{code:$("#code").val()},//{key,value} 
      success  :function(data) { 
        if (data == "YES"){ 
          document.getElementById("msg-code").innerHTML = "(<fmt:message key=&#39;warn.field.required.unique&#39; bundle=&#39;${bundle }&#39; />)"; 
          return true; 
        } 
        else { 
          $("#p-code").addClass("has-error"); 
          document.getElementsByName("code")[0].value = "";  
          //document.getElementsByName("code")[0].setAttribute("placeholder", "<fmt:message key=&#39;warn.duplicate&#39; bundle=&#39;${bundle }&#39; />");  
          document.getElementById("msg-code").innerHTML = "(<fmt:message key=&#39;warn.duplicate&#39; bundle=&#39;${bundle }&#39; /> !!!)"; 
          return false; 
        } 
      } 
    });

Copy after login

The above is what I compiled for everyone. I hope it will be helpful to everyone in the future.

Detailed explanation of the steps to implement the blog post adding category function with PHP AJAX

How to implement the voting function with PHP AJAX

How does PHP get the headers (case) in ajax

The above is the detailed content of Ajax check whether duplicate implementation code. For more information, please follow other related articles on the PHP Chinese website!