struts2+jquery implementation ajax login example details
- 2020-12-19 21:08:57
- OfStack
An example of text instrument describes the implementation method of struts2+jquery to realize ajax landing. The specific steps are as follows:
1. Create a new web project and name it test. Configure the environment for struts2 and import the js file for Jquery into the project.
2. Under com. action package, create a new ES15en. java
The code for loginAction. java is as follows
package com.action;
import org.apache.struts2.convention.annotation.Action;
import org.apache.struts2.convention.annotation.ParentPackage;
import org.apache.struts2.convention.annotation.Result;
import org.apache.struts2.convention.annotation.Results;
import com.opensymphony.xwork2.ActionSupport;
@Action("login")
@ParentPackage(value = "json-default")
@Results({ @Result(name = "success", type = "json", params = { "data", "flag" }), })
public class LoginAction extends ActionSupport {
/**
*
*/
private static final long serialVersionUID = 1751244794407005783L;
private String flag;
private String username;
private String password;
public String execute() {
try {
if (getUsername() == null || getUsername().trim().equals("")) {
setFlag(" The user name cannot be empty ");
return SUCCESS;
} else if (getPassword() == null || getPassword().trim().equals("")) {
setFlag(" The password cannot be empty ");
return SUCCESS;
} else if (getUsername().trim().equals("admin")
&& getPassword().equals("admin")) {
setFlag(" Log in successfully ");
return SUCCESS;
} else {
setFlag(" Incorrect user name or password ");
return SUCCESS;
}
} catch (Exception e) {
e.printStackTrace();
setFlag(" Log in abnormal ");
return SUCCESS;
}
}
public String getFlag() {
return flag;
}
public void setFlag(String flag) {
this.flag = flag;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
}
3. Create index.jsp and success.jsp in the WebRoot directory
index. jsp is the login interface, and ES33en. jsp is the interface to jump after successful login.
index.jsp reads as follows:
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
String path = request.getContextPath();
String basePath = request.getScheme() + "://"
+ request.getServerName() + ":" + request.getServerPort()
+ path + "/";
%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<base href="<%=basePath%>" rel="external nofollow" >
<title>My JSP 'index.jsp' starting page</title>
<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">
<script type="text/javascript" src="./resource/js/jquery.min.js"></script>
</head>
<script type="text/javascript">
$(document).ready(function() {
$(".loginButton").click(function() {
var name = $("#username").val();// Gets the login user name
var password = $("#password").val(); // Get the login password
$.post("login", {
username : name,
password : password
}, callback, "json");
});
function callback(data) {
var value=data.flag;
if(value==" Log in successfully "){
location.href="./success.jsp" rel="external nofollow" ;
}else{
alert(value);
}
});
</script>
<body>
<input name="username" id="username" type="text" />
<input name="password" id="password" type="password" />
<button class="loginButton" class="btn btn-inverse"> landing </button>
</body>
</html>