Part 12th _STRUTS2 Input Check

An example of input validation is provided below, with progressive learning:

First, create the input page: register.jsp:

<%@ page language= "java" import= "java.util.*" pageencoding= "GBK"%><%@ taglib uri= "/struts-tags" prefix= "s"% ><%string path = Request.getcontextpath (); String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
The 
 Then establishes the processing class Registeraction: 
 
Package Com.test.action;import Java.util.calendar;import Java.util.date;import Com.opensymphony.xwork2.actionsupport;public class Registeraction extends actionsupport{private String username; private string Password;private string repassword;private int age;private Date birthday;private date graduation;public St Ring GetUserName () {return username;} public void Setusername (String username) {this.username = username;} Public String GetPassword () {return password;} public void SetPassword (String password) {this.password = password;} Public String Getrepassword () {return repassword;} public void Setrepassword (String repassword) {This.repassword = Repassword;} public int getage () {return age;} public void Setage (int.) {this.age = age;} Public Date Getbirthday () {return birthday;} public void Setbirthday (Date birthday) {this.birthday = birthday;} Public Date getgraduation () {return graduation;} public void Setgraduation (Date graduation) {this.graduation = graduation;} @Overridepublic String Execute () throws ExcepTion{system.out.println ("execute invoked"); return SUCCESS;} Public String test () throws Exception{system.out.println ("Test invoked"); return SUCCESS;} public void Validatetest () {} @Overridepublic void Validate () {System.out.println ("validate~~~~~~~~~~~~~~~~"); if (null = = Username | | Username.length () < 6 | | Username.length () > 10) {//error message Output This.addactionerror ("username invalid"); This.addfielderror ("username", "field Error:username invalid ");} if (null = = password | | password.length () < 6 | | password.length () >) {this.addactionerror ("password Invalid");} else if (null = = Repassword | | repassword.length () < 6 | | repassword.length () >) {this.addactionerror ("Repassword I Nvalid ");} else if (!password.equals (Repassword)) {This.addactionerror ("both passwords not the same");} if (age < 1 |-age > Max) {this.addactionerror ("Age Invalid");//This.addfielderror ("Age", "Field error:age invalid") ;} if (null = = Birthday) {this.addactionerror ("birthday Invalid");} if (null = = graduation) {thIs.addactionerror ("Graduation Invalid");} if (null! = Birthday && null! = Graduation)//Can not be written because the previous validation passed {Calendar C1 = calendar.getinstance (); C1.settime (Birt Hday); Calendar C2 = calendar.getinstance (), C2.settime (Graduation), if (!c1.before (C2)) {This.addactionerror ("Birthday Should be before graduation ");}}}
The 
 success.jsp is as follows: 
 
<%@ page language= "java" import= "java.util.*" pageencoding= "iso-8859-1"%><%string path = Request.getcontextpath (); String basepath = request.getscheme () + "://" +request.getservername () + ":" +request.getserverport () +path+ "/";%> <! DOCTYPE HTML PUBLIC "-//w3c//dtd HTML 4.01 transitional//en" >
The Web. xml file is configured as follows:
<?xml version= "1.0" encoding= "UTF-8"? ><web-app version= "2.5" xmlns= "Http://java.sun.com/xml/ns/javaee" Xmlns:xsi= "Http://www.w3.org/2001/XMLSchema-instance" xsi:schemalocation= "Http://java.sun.com/xml/ns/javaee http ://java.sun.com/xml/ns/javaee/web-app_2_5.xsd ">    <filter>  <filter-name>struts2</ filter-name>  <filter-class>  Org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter  </filter-class>  </ filter>    <filter-mapping>  <filter-name>struts2</filter-name>  <url-pattern >/*</url-pattern>  </filter-mapping>    </web-app>
The Struts.xml configuration is as follows:
<?xml version= "1.0" encoding= "UTF-8"? ><! DOCTYPE struts Public "-//apache software foundation//dtd struts Configuration 2.0//en" "Http://struts.apache.org/dt Ds/struts-2.0.dtd "><struts><package name=" struts2 "extends=" Struts-default "><action name=" HelloWorld "class=" Com.test.action.HelloWorld "><result name=" Success ">/helloworld.jsp</result> </action><action name= "Login" class= "com.test.action.LoginAction" ><result name= "Success" >/ Result.jsp</result></action><action name= "converteraction" class= "Com.test.action.PointAction" method= "Test" ><result name= "Success" >/output.jsp</result></action><action name= "register "Class=" com.test.action.RegisterAction "method=" test "><result name=" Success ">/success.jsp</result ><result name= "Input" >/REGISTER.JSP</RESULT></ACTION></PACKAGE></STRUTS> 
To localize, create a new Registeraction.properties file under the package com.test.action where Registeraction.java is located, adding the following via add:
　　
To access http://localhost:8080/struts2/register.jsp, here is an output case:
Here are a few things to note: The calibration method defined in the method of calibration is executed first, the last execution of the Validate method, and the action-level message struts does not help us to generate automatically, and the field-level error message will help us build, but also can write their own error message, This is the field-level struts-defined and byte-defined messages are output; In order to output information on a page, you need to add information like the following on the form form:
<s:actionerror cssstyle= "color:red"/><%--actionerror add all the information displayed on the page--%>
<s:fielderror cssstyle= "Color:blue" ></s:fielderror>
　　
Part 12th _STRUTS2 Input Check