关于结果处理类型input的代码演示-深入Struts2

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一 Input因为年龄输入错误自动跳转回输入界面

1、struts.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd";>

<default-action-ref name="index"></default-action-ref>

<result>/error.jsp</result>

</action>

<result>/result.jsp</result>

</action>

<result>/success.jsp</result>

<result name="input">/login.jsp</result>

</action>

</package>

</struts>

2、User.java

package com.cakin.po;

import java.util.List;

public class User {

private String username;

private String password;

private int age;

public int getAge() {

return age;

}

public void setAge(int age) {

this.age = age;

}

private List<User> booklist;

public List<User> getBooklist() {

return booklist;

}

public void setBooklist(List<User> booklist) {

this.booklist = booklist;

}

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;

}

3、login.jsp

<%@ 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>

<title>My JSP 'login.jsp' starting page</title>

<!--

-->

</head>

<body>

用户名：<input type="text" name="username">

密码：<input type="password" name="password">

书籍1：<input type="text" name="booklist[0].username">

书籍2：<input type="text" name="booklist[1].username">

年龄：<input type="text" name="age">

</form>

</body>

</html>

4、测试

二通过addFieldError跳回到输入页码，并带错误提示

1、struts.xml

<?xml version="1.0" encoding="UTF-8" ?>

<!DOCTYPE struts PUBLIC "-//Apache Software Foundation//DTD Struts Configuration 2.1//EN" "http://struts.apache.org/dtds/struts-2.1.dtd";>

<default-action-ref name="index"></default-action-ref>

<result>/error.jsp</result>

</action>

<result>/result.jsp</result>

</action>

<result>/success.jsp</result>

<result name="input">/login.jsp</result>

</action>

</package>

</struts>

2、login.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>

<%@ 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>

<title>My JSP 'login.jsp' starting page</title>

<!--

-->

</head>

<body>

用户名：<input type="text" name="username"><s:fielderror name="username"></s:fielderror>

密码：<input type="password" name="password">

书籍1：<input type="text" name="booklist[0].username">

书籍2：<input type="text" name="booklist[1].username">

年龄：<input type="text" name="age">

</form>

</body>

</html>

3、LoginAction

package com.cakin.action;

import com.cakin.po.User;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class LoginAction extends ActionSupport implements ModelDriven<User>{

private User user =new User();

public String login(){

if(user.getUsername()==null

||"".equals(user.getUsername()))

{

this.addFieldError("username", "用户名为空");

return INPUT;

}

System.out.println(user.getUsername());

System.out.println(user.getBooklist().get(0).getUsername());

System.out.println(user.getBooklist().get(1).getUsername());

return SUCCESS;

}

@Override

public User getModel() {

// TODO Auto-generated method stub

return user;

}

4、测试

三通过validate方法实现调回到输入页码

1、LoginAction.jsp

package com.cakin.action;

import com.cakin.po.User;

import com.opensymphony.xwork2.ActionSupport;

import com.opensymphony.xwork2.ModelDriven;

public class LoginAction extends ActionSupport implements ModelDriven<User>{

private User user =new User();

public String login(){

System.out.println(user.getUsername());

System.out.println(user.getBooklist().get(0).getUsername());

System.out.println(user.getBooklist().get(1).getUsername());

return SUCCESS;

}

@Override

public void validate() {

// TODO Auto-generated method stub

if(user.getUsername()==null

||"".equals(user.getUsername()))

{

this.addFieldError("username", "用户名为空");

//return INPUT;

}

@Override

public User getModel() {

// TODO Auto-generated method stub

return user;

}

2、测试

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