Struts2+jquery realize Ajax Login instance detailed _jsp programming

Text instrument An example of the implementation of struts2+jquery implementation of Ajax landing method, the following steps:

First, create a new Web project, name test. Configure the STRUTS2 environment and import jquery's JS files to the project.

Second, under the Com.action package, a new Loginaction.java

Loginaction.java's code 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 = {"Da Ta "," Flag "}), public class Loginaction extends Actionsupport {/** * */private static final long Serialv
  Ersionuid = 1751244794407005783L;
  Private String flag;
  Private String username;

  private String password; Public String Execute () {try {if (getusername () = null | | getusername (). Trim (). Equals ("")) {Setflag (
        "User name cannot be empty");
      return SUCCESS;
        else if (getpassword () = null | | GetPassword (). Trim (). Equals ("")) {Setflag ("Password cannot be blank");
      return SUCCESS;
else if (getusername (). Trim (). Equals ("admin")          && GetPassword (). Equals ("admin")) {Setflag ("login succeeded");
      return SUCCESS;
        else {setflag ("User name or password error");
      return SUCCESS;
      } catch (Exception e) {e.printstacktrace ();
      Setflag ("Landing anomaly");
    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;

 }

}

Iii. new index.jsp and success.jsp in the Webroot catalogue

Index.jsp for landing interface, success.jsp for landing after the successful jump interface.

Index.jsp contents are 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" >