struts2学习笔记六（第6讲.Struts2的输入校验续一）
Struts2的输入校验续一
说明:
遇到类型转换错误的时候（也就是说不能进行类型转换），struts2框架自动生成一条错误信息，并且将该错误信息放到addFieldError里面。
类型转换与输入校验的流程：
1. 首先Struts2对客户端传来的数据进行类型转换
2. 类型转换完毕后再进行输入校验
3. 如果类型转换和输入校验都没有错误发生，那么进入execute方法（调用商业逻辑）
注意：如果类型转换不成功，也同样要进行输入校验
一、修改注册页面register.jsp:
<body><table align="center" width="40%"><tr><td style="color:red"><s:fielderror></s:fielderror></td></tr></table><form action="register.action" method="post"><table align="center" width="40%" border="1"><tr><td>username:</td><td><input type="text" name="username" value="${username}"></td></tr><tr><td>password:</td><td><input type="password" name="password"></td></tr><tr><td>repassword:</td><td><input type="password" name="repassword"></td></tr><tr><td>age:</td><td><input type="text" name="age"></td></tr><tr><td>birthday:</td><td><input type="text" name="birthday"></td></tr><tr><td>graduation:</td><td><input type="text" name="graduation"></td></tr><tr><td><input type="submit" value=" submit "></td><td><input type="reset" value=" reset "></td></tr></table></form> </body>xwork.default.invalid.fieldvalue={0} error<constant name="struts.custom.i18n.resources" value="message"></constant>这里的message就是上面定义的message.properties文件。
invalid.fieldvalue.age=age conversion error还是age的类型转化为例的。
<%@ page language="java" import="java.util.*" pageEncoding="GB18030"%><%@ taglib prefix="s" uri="/struts-tags" %><%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%>"> <title>My JSP 'register2.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"><!--<link rel="stylesheet" type="text/css" href="styles.css">--> </head> <body> <s:form action="register"> <s:textfield name="username" label="username"></s:textfield> <s:password name="password" label="password"></s:password> <s:password name="repassword" label="repassword"></s:password> <s:textfield name="age" label="age"></s:textfield> <s:textfield name="birthday" label="birthday"></s:textfield> <s:textfield name="graduation" label="graduation"></s:textfield> <s:submit value=" submit "></s:submit> </s:form> </body></html>
<action name="register" name="code">invalid.fieldvalue.age=\u5e74\u9f84\u4fe1\u606f\u8f93\u5165\u4e0d\u6b63\u786einvalid.fieldvalue.birthday=\u751f\u65e5\u65e5\u671f\u8f93\u5165\u9519\u8befinvalid.fieldvalue.graduation=\u6bd5\u4e1a\u65f6\u95f4\u65e5\u671f\u8f93\u5165\u9519\u8bef
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 String 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 age) {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 {return SUCCESS;}@Overridepublic void validate() {if(null == username || username.length() < 6 || username.length() > 10){this.addFieldError("username", "username invalid");}if(null == password || password.length() <6 || password.length() > 10){this.addFieldError("password", "password invalid");}else if(null == repassword || repassword.length() < 6 || repassword.length() > 10){this.addFieldError("repassword", "repassword invalid");}else if(!password.equals(repassword)){this.addFieldError("password", "two passwords not the same");}if(age <= 0 || age > 150){this.addFieldError("age", "age should be between 1 and 150");}//if(null == birthday){//this.addFieldError("birthday", "birthday invalid");//}//if(null == graduation){//this.addFieldError("graduation", "graduation invalid");//}if(null != birthday && null != graduation){Calendar c1 = Calendar.getInstance();c1.setTime(birthday);Calendar c2 = Calendar.getInstance();c2.setTime(graduation);if(!c1.before(c2)){this.addFieldError("birthday", "birthday should be before graduation");}}}}