轉載自:https://blog.csdn.net/yuhui123999/article/details/51802293
1.編碼方式驗證
在Action的execute方式執行前會先執行validate方法,如果在validate方法裏addFieldError或者addActionError,那麼Action將不會執行execu方法,並且會直接跳轉到一個名爲“input”的result視圖。推薦對每個需要數據驗證的方法創建validate加上自定義方法的名稱的一個驗證方式,如自定義方法login,則創建validateLogin驗證方法。
Action
- package com.zucc.action;
- import com.opensymphony.xwork2.ActionSupport;
- import com.opensymphony.xwork2.ModelDriven;
- import com.zucc.model.User;
- public class UserAction extends ActionSupport implements ModelDriven<User>{
- private User user;
- @Override
- public String execute() throws Exception {
- System.out.println("UserAction execute.....");
- System.out.println("username:"+user.getUsername());
- System.out.println("password:"+user.getPassword());
- System.out.println("rePassword:"+user.getRePassword());
- System.out.println("age:"+user.getAge());
- System.out.println("do register....");
- return SUCCESS;
- }
- @Override
- public User getModel() {
- this.user = new User();
- return this.user;
- }
- @Override
- public void validate() {
- System.out.println("UserAction validate....");
- if(user.getUsername()==null||user.getUsername().trim().equals("")){
- this.addFieldError("username", "用戶賬號不能爲空");
- }
- if(user.getPassword()==null||user.getPassword().trim().equals("")){
- this.addFieldError("password", "密碼不能爲空");
- }
- if(user.getRePassword()==null||user.getRePassword().trim().equals("")){
- this.addFieldError("rePassword", "確認密碼不能爲空");
- }
- if(!(user.getPassword().equals(user.getRePassword()))){
- this.addFieldError("rePassword", "兩次輸入密碼不一致");
- }
- if(user.getAge()<=0||user.getAge()>150){
- this.addFieldError("age", "年齡不合法");
- }
- }
- }
驗證不通過跳轉到一個名爲“input”的result視圖,在struts.xml中配置
struts.xml
- <struts>
- <constant name="struts.enable.DynamicMethodInvocation" value="true" />
- <constant name="struts.devMode" value="true" />
- <package name="default" namespace="/" extends="struts-default">
- <action name="user_register" class="com.zucc.action.UserAction" method="register">
- <result>/Hello.jsp</result>
- <result name="input">/register.jsp</result>
- </action>
- </package>
- </struts>
在表單上顯示addFieldError中的信息有三種方式,一種是使用EL,一種是使用struts-tags標籤,一種是完全使用struts-tags標籤
使用EL
- <body>
- <h1>用戶註冊</h1>
- <div>${fieldErrors['password'][0]}</div>
- <div>${fieldErrors['rePassword'][0]}</div>
- <div>${fieldErrors['age'][0]}</div></span>
- <form action="user_register" method="post">
- 帳號:<input type="text" name="username"><br/>
- 密碼:<input type="password" name="password"><br/>
- 確認密碼:<input type="password" name="rePassword"><br/>
- 年齡:<input type="text" name="age"><br/>
- <input type="submit" value="提交">
- </form>
- <hr/>
- </body>
使用struts-tags標籤
- <%@ taglib prefix="s" uri="/struts-tags" %>
- <body>
- <h1>用戶註冊</h1>
- <div><s:fielderror></s:fielderror></div>
- <form action="user_register" method="post">
- 帳號:<input type="text" name="username"><br/>
- 密碼:<input type="password" name="password"><br/>
- 確認密碼:<input type="password" name="rePassword"><br/>
- 年齡:<input type="text" name="age"><br/>
- <input type="submit" value="提交">
- </form>
- </body>
完全使用struts-tags標籤
- <%@ taglib prefix="s" uri="/struts-tags" %>
- <body>
- <h1>用戶註冊</h1>
- <s:form action="user_register" method="post">
- <s:textfield name="username" label="帳號"/>
- <s:password name="password" label="密碼"/>
- <s:password name="rePassword" label="確認密碼"/>
- <s:textfield name="age" label="年齡"/>
- <s:submit value="提交"/>
- </s:form>
- </body>
2.使用validation.xml驗證
使用XML對Action方法進行校驗方式有兩種:
一種是對Action的所有方法進行校驗,validation.xml的名字是ActionClassName-validation.xml,其ActionClassName爲action的類名,-valication爲固定寫法,如UserAction-validation.xml;
另一種是對Action指定方法進行校驗,validation.xml的名字是ActionClassName-AccessActionName-validation.xml,其中ActionClassName爲action的類名,AccessActionName爲指定Action的方法在struts.xml的 action name,-valication爲固定寫法,如UserAction-user_register-validation.xml
Action-UserAction
- package com.zucc.action;
- import com.opensymphony.xwork2.ActionSupport;
- import com.opensymphony.xwork2.ModelDriven;
- import com.zucc.model.User;
- public class UserAction extends ActionSupport implements ModelDriven<User>{
- private User user;
- @Override
- public String execute() throws Exception {
- System.out.println("UserAction execute.....");
- System.out.println("username:"+user.getUsername());
- System.out.println("password:"+user.getPassword());
- System.out.println("rePassword:"+user.getRePassword());
- System.out.println("age:"+user.getAge());
- System.out.println("do register....");
- return SUCCESS;
- }
- @Override
- public User getModel() {
- this.user = new User();
- return this.user;
- }
- public String register() throws Exception{
- System.out.println("UserAction register....");
- return SUCCESS;
- }
- }
如果validation.xml的名字是UserAction-validation.xml,那就是對UserAction中的所有方法進行驗證;如果validation.xml的名字是UserAction-user_register-validation.xml,那就只是對UserAction中的register方法進行驗證。
user_register是因爲struts.xml的action name是user_register,如下面的struts.xml
struts.xml
- <struts>
- <constant name="struts.enable.DynamicMethodInvocation" value="true" />
- <constant name="struts.devMode" value="true" />
- <package name="default" namespace="/" extends="struts-default">
- <action name="user_register" class="com.zucc.action.UserAction" method="register">
- <result>/Hello.jsp</result>
- </action>
- </package>
- </struts>
屬性field
- <?xml version="1.0" encoding="UTF-8"?>
- <!DOCTYPE validators PUBLIC
- "-//Apache Struts//XWork Validator 1.0.3//EN"
- "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">
- <validators>
- <field name="username">
- <field-validator type="required">
- <message>用戶名不能爲空</message>
- </field-validator>
- <field-validator type="requiredstring">
- <message>用戶名不能爲空</message>
- </field-validator>
- </field>
- <field name="age">
- <field-validator type="int">
- <param name="max">150</param>
- <param name="min">1</param>
- <message>年齡必須介於1-150</message>
- </field-validator>
- </field>
- <field name="password">
- <field-validator type="requiredstring">
- <message>密碼不能爲空</message>
- </field-validator>
- </field>
- <field name="rePassword">
- <field-validator type="requiredstring">
- <message>確認密碼不能爲空</message>
- </field-validator>
- </field>
- <field name="rePassword">
- <field-validator type="fieldexpression">
- <param name="expression">password.equals(rePassword)</param>
- <message>密碼必須一致</message>
- </field-validator>
- </field>
- </validators>
- <?xml version="1.0" encoding="UTF-8"?>
- <!DOCTYPE validators PUBLIC
- "-//Apache Struts//XWork Validator 1.0.3//EN"
- "http://struts.apache.org/dtds/xwork-validator-1.0.3.dtd">
- <validators>
- <validator type="requiredstring">
- <param name="fieldName">username</param>
- <message>用戶名不能爲空</message>
- </validator>
- <validator type="requiredstring">
- <param name="fieldName">password</param>
- <message>密碼不能爲空</message>
- </validator>
- <validator type="requiredstring">
- <param name="fieldName">rePassword</param>
- <message>確認密碼不能爲空</message>
- </validator>
- <validator type="fieldexpression">
- <param name="expression">password.equals(rePassword)</param>
- <param name="fieldName">rePassword</param>
- <message>密碼必須一致</message>
- </validator>
- <validator type="int">
- <param name="fieldName">age</param>
- <param name="max">150</param>
- <param name="min">1</param>
- <message>年齡必須介於1-150</message>
- </validator>
- </validators>