(02)Structs初學筆記——用DomainModel接收參數

實現功能:點擊按鈕後傳uer的值到後臺


前後臺URL傳值一共有三種方法,一種用屬性傳,一種傳domainmodel即傳類,還有一種是modeldrivenparam,

我們通常用第一種或者第二種用的多,這裏用第二種爲例:



先寫前臺:

<?xml version="1.0" encoding="GB18030" ?>
<%@ page language="java" contentType="text/html; charset=GB18030"
    pageEncoding="GB18030"%>

<% 
String path = request.getContextPath();
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
%>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=GB18030" />
<base href="<%=basePath %>"/>
<title>Insert title here</title>
</head>
<body> 
使用Domain Model接收參數<a href="user/user!add?user.name=a&user.age=8">添加用戶</a><br />


使用Domain Model接收參數<a href="user/user!addDetail?userDTO.name=a&userDTO.password=123456&userDTO.confirmingPassword=123456">添加用戶詳細</a>
	
</body>
</html>

structs.xml:

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">

<struts>
    <constant name="struts.devMode" value="true" />
    <package name="user" extends="struts-default" namespace="/user">      
        <action name="user" class="com.bjsxt.struts2.user.action.UserAction">
            <result>/user_add_success.jsp</result>
        </action>
    </package>
</struts>

user.java:

package com.bjsxt.struts2.user.model;

public class User {
	private String name;
	private int age;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public int getAge() {
		return age;
	}
	public void setAge(int age) {
		this.age = age;
	}
}

userDTO.java:

package com.bjsxt.struts2.user.dto;

public class UserDTO {
	private String name;
	private String password;
	private String confirmingPassword;
	public String getName() {
		return name;
	}
	public void setName(String name) {
		this.name = name;
	}
	public String getPassword() {
		return password;
	}
	public void setPassword(String password) {
		this.password = password;
	}
	public String getConfirmingPassword() {
		return confirmingPassword;
	}
	public void setConfirmingPassword(String confirmingPassword) {
		this.confirmingPassword = confirmingPassword;
	}
}

Action類:

structs想要接受前臺數據url的數據很簡單,直接建一個bean,然後直接用bean.屬性取值,例如我前臺url是user.name=a,後臺想取值,直接是user.getName就能得到數據了
注意,這裏的name不一定要前後臺保持一致,他是通過getName這個方法獲取參數的,如果後臺想用XXX這個名字,請把構造函數改成
    public void setXXX(String name) {
        this.XXX = name;
    }
    不過如果你沒有特殊需求,一般還是保持一致比較好。

package com.bjsxt.struts2.user.action;

import com.bjsxt.struts2.user.dto.UserDTO;
import com.bjsxt.struts2.user.model.User;
import com.opensymphony.xwork2.ActionSupport;

public class UserAction extends ActionSupport {
	
	private User user;
	
	//DTO:數據傳輸對象
	//正常user裏放用戶名密碼,而我想要確認密碼這個屬性,放user表又不合適,所以就九遊了userDto這個類,專門存傳輸數據中所需要用到的屬性,其本質就是一個叫userDTO的model,專門接受下數據,然後傳遞下
	private UserDTO userDTO;

	public String add() {
		System.out.println("name=" + user.getName());
		System.out.println("age=" + user.getAge());
		return SUCCESS;
	}
	
	public String addDetail() {
		System.out.println("userDTO.Name=" + userDTO.getName());
		System.out.println("userDTO.Password=" + userDTO.getPassword());
		System.out.println("userDTO.userConfirmingPassword=" + userDTO.getConfirmingPassword());
		return SUCCESS;
	}


	public User getUser() {
		return user;
	}
	public void setUser(User user) {
		this.user = user;
	}
	public UserDTO getUserDTO() {
		return userDTO;
	}
	public void setUserDTO(UserDTO userDTO) {
		this.userDTO = userDTO;
	}
	
}


項目結構如圖:


            

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